Merge branch 'with-ghcjs' into 'master'

Use Haskell on the frontend

See merge request guyonvarch/shared-cost!2

47 files changed, 4365 insertions, 0 deletions

diff --git a/client/LICENSE b/client/LICENSE
new file mode 100644
index 0000000..45644ff
--- /dev/null
+++ b/client/LICENSE
@@ -0,0 +1,674 @@
+              GNU GENERAL PUBLIC LICENSE
+                Version 3, 29 June 2007
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+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+              END OF TERMS AND CONDITIONS
+
+     How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/client/Setup.hs b/client/Setup.hs
new file mode 100644
index 0000000..4467109
--- /dev/null
+++ b/client/Setup.hs
@@ -0,0 +1,2 @@
+import           Distribution.Simple
+main = defaultMain
diff --git a/client/client.cabal b/client/client.cabal
new file mode 100644
index 0000000..cf2c5a1
--- /dev/null
+++ b/client/client.cabal
@@ -0,0 +1,90 @@
+Name:                client
+Version:             0.0.1
+License:             GPL-3
+License-file:        LICENSE
+Author:              Joris Guyonvarch
+Maintainer:          joris@guyonvarch.me
+Category:            Web
+Build-type:          Simple
+Cabal-version:       >=1.10
+
+Executable client
+  Main-Is:           Main.hs
+  -- Ghc-options:       -Wall -Werror
+  Hs-source-dirs:    src
+  Default-language:  Haskell2010
+
+  Default-extensions:
+    ExistentialQuantification
+    LambdaCase
+    MultiParamTypeClasses
+    OverloadedStrings
+    RecursiveDo
+    ScopedTypeVariables
+
+  Build-depends:
+      aeson
+    , base >= 4.11 && < 5
+    , bytestring
+    , common
+    , containers
+    , data-default
+    , ghcjs-dom-jsffi
+    , jsaddle-dom
+    , reflex-dom
+    , text
+    , time
+    , validation
+
+    -- Router
+    , ghcjs-base
+    , ghcjs-prim
+    , ghcjs-dom
+    , jsaddle
+    , lens
+    , uri-bytestring
+
+  other-modules:
+    Component.Appearing
+    Component.Button
+    Component.ConfirmDialog
+    Component.Form
+    Component.Input
+    Component.Link
+    Component.Modal
+    Component.ModalForm
+    Component.Pages
+    Component.Select
+    Component.Table
+    Component.Tag
+    Loadable
+    Model.Route
+    Util.Ajax
+    Util.Css
+    Util.Either
+    Util.Reflex
+    Util.Router
+    Util.Validation
+    Util.WaitFor
+    View.App
+    View.Header
+    View.Icon
+    View.Income.Form
+    View.Income.Header
+    View.Income.Income
+    View.Income.Reducer
+    View.Income.Table
+    View.Category.Form
+    View.Category.Category
+    View.Category.Reducer
+    View.Category.Table
+    View.NotFound
+    View.Payment.Form
+    View.Payment.HeaderForm
+    View.Payment.HeaderInfos
+    View.Payment.Payment
+    View.Payment.Reducer
+    View.Payment.Table
+    View.SignIn
+    View.Statistics.Chart
+    View.Statistics.Statistics
diff --git a/client/src/Component/Appearing.hs b/client/src/Component/Appearing.hs
new file mode 100644
index 0000000..e0144ca
--- /dev/null
+++ b/client/src/Component/Appearing.hs
@@ -0,0 +1,10 @@
+module Component.Appearing
+  ( view
+  ) where
+
+import           Reflex.Dom (MonadWidget)
+import qualified Reflex.Dom as R
+
+view :: forall t m a. MonadWidget t m => m a -> m a
+view =
+  R.divClass "g-Appearing"
diff --git a/client/src/Component/Button.hs b/client/src/Component/Button.hs
new file mode 100644
index 0000000..153a61b
--- /dev/null
+++ b/client/src/Component/Button.hs
@@ -0,0 +1,57 @@
+module Component.Button
+  ( In(..)
+  , Out(..)
+  , view
+  , defaultIn
+  ) where
+
+import qualified Data.Map   as M
+import           Data.Maybe (catMaybes)
+import           Data.Text  (Text)
+import qualified Data.Text  as T
+import           Reflex.Dom (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom as R
+
+import qualified View.Icon  as Icon
+
+data In t m = In
+  { _in_class    :: Dynamic t Text
+  , _in_content  :: m ()
+  , _in_waiting  :: Event t Bool
+  , _in_tabIndex :: Maybe Int
+  , _in_submit   :: Bool
+  }
+
+defaultIn :: forall t m. MonadWidget t m => m () -> In t m
+defaultIn content = In
+  { _in_class    = R.constDyn ""
+  , _in_content  = content
+  , _in_waiting  = R.never
+  , _in_tabIndex = Nothing
+  , _in_submit   = False
+  }
+
+data Out t = Out
+  { _out_clic :: Event t ()
+  }
+
+view :: forall t m. MonadWidget t m => In t m -> m (Out t)
+view input = do
+  dynWaiting <- R.holdDyn False $ _in_waiting input
+
+  let attr = do
+        buttonClass <- _in_class input
+        waiting <- dynWaiting
+        return . M.fromList . catMaybes $
+          [ Just ("type", if _in_submit input then "submit" else "button")
+          , (\i -> ("tabindex", T.pack . show $ i)) <$> _in_tabIndex input
+          , Just ("class", T.intercalate " " [ buttonClass, if waiting then "waiting" else "" ])
+          ]
+
+  (e, _) <- R.elDynAttr' "button" attr $ do
+    Icon.loading
+    R.divClass "content" $ _in_content input
+
+  return $ Out
+    { _out_clic = R.domEvent R.Click e
+    }
diff --git a/client/src/Component/ConfirmDialog.hs b/client/src/Component/ConfirmDialog.hs
new file mode 100644
index 0000000..cf26593
--- /dev/null
+++ b/client/src/Component/ConfirmDialog.hs
@@ -0,0 +1,49 @@
+module Component.ConfirmDialog
+  ( In(..)
+  , view
+  ) where
+
+import           Data.Text        (Text)
+import           Reflex.Dom       (Event, MonadWidget)
+import qualified Reflex.Dom       as R
+
+import qualified Common.Msg       as Msg
+import qualified Component.Button as Button
+import qualified Component.Modal  as Modal
+import qualified Util.Either      as EitherUtil
+import qualified Util.WaitFor     as WaitFor
+
+data In t m = In
+  { _in_header  :: Text
+  , _in_confirm :: Event t () -> m (Event t ())
+  }
+
+view :: forall t m a. MonadWidget t m => (In t m) -> Modal.Content t m
+view input _ =
+  R.divClass "confirm" $ do
+    R.divClass "confirmHeader" $
+      R.text $ _in_header input
+
+    R.divClass "confirmContent" $ do
+      (confirm, cancel) <- R.divClass "buttons" $ do
+
+        cancel <- Button._out_clic <$> (Button.view $
+          (Button.defaultIn (R.text $ Msg.get Msg.Dialog_Undo))
+            { Button._in_class = R.constDyn "undo" })
+
+        rec
+          confirm <- Button._out_clic <$> (Button.view $
+            (Button.defaultIn (R.text $ Msg.get Msg.Dialog_Confirm))
+              { Button._in_class = R.constDyn "confirm"
+              , Button._in_submit = True
+              , Button._in_waiting = waiting
+              })
+
+          (result, waiting) <- WaitFor.waitFor (_in_confirm input) confirm
+
+        return (result, cancel)
+
+      return $
+        ( R.leftmost [ cancel, () <$ confirm ]
+        , confirm
+        )
diff --git a/client/src/Component/Form.hs b/client/src/Component/Form.hs
new file mode 100644
index 0000000..6878e68
--- /dev/null
+++ b/client/src/Component/Form.hs
@@ -0,0 +1,12 @@
+module Component.Form
+  ( view
+  ) where
+
+import qualified Data.Map   as M
+import           Reflex.Dom (MonadWidget)
+import qualified Reflex.Dom as R
+
+view :: forall t m a. MonadWidget t m => m a -> m a
+view content =
+  R.elAttr "form" (M.singleton "onsubmit" "event.preventDefault()") $
+    content
diff --git a/client/src/Component/Input.hs b/client/src/Component/Input.hs
new file mode 100644
index 0000000..bcff377
--- /dev/null
+++ b/client/src/Component/Input.hs
@@ -0,0 +1,151 @@
+module Component.Input
+  ( In(..)
+  , Out(..)
+  , view
+  , defaultIn
+  ) where
+
+import qualified Data.Map               as M
+import qualified Data.Maybe             as Maybe
+import           Data.Text              (Text)
+import qualified Data.Text              as T
+import           Data.Time              (NominalDiffTime)
+import           Data.Validation        (Validation (Failure, Success))
+import qualified Data.Validation        as V
+import           Reflex.Dom             (Dynamic, Event, MonadWidget, Reflex,
+                                         (&), (.~))
+import qualified Reflex.Dom             as R
+
+import qualified Common.Util.Validation as ValidationUtil
+import qualified Component.Button       as Button
+import qualified View.Icon              as Icon
+
+data In a = In
+  { _in_hasResetButton :: Bool
+  , _in_label          :: Text
+  , _in_initialValue   :: Text
+  , _in_inputType      :: Text
+  , _in_validation     :: Text -> Validation Text a
+  }
+
+defaultIn :: In Text
+defaultIn = In
+  { _in_hasResetButton = True
+  , _in_label          = ""
+  , _in_initialValue   = ""
+  , _in_inputType      = "text"
+  , _in_validation     = V.Success
+  }
+
+data Out t a = Out
+  { _out_raw   :: Dynamic t Text
+  , _out_value :: Dynamic t (Validation Text a)
+  , _out_enter :: Event t ()
+  }
+
+view
+  :: forall t m a b. MonadWidget t m
+  => In a
+  -> Event t Text -- reset
+  -> Event t b    -- validate
+  -> m (Out t a)
+view input reset validate = do
+  rec
+    let resetValue = R.leftmost
+          [ reset
+          , fmap (const "") resetClic
+          ]
+
+        inputAttr = R.ffor value (\v ->
+          if T.null v && _in_inputType input /= "date" && _in_inputType input /= "color"
+            then M.empty
+            else M.singleton "class" "filled")
+
+        value =  R._textInput_value textInput
+
+        containerAttr = R.ffor inputError (\e ->
+          M.singleton "class" $ T.intercalate " "
+            [ "textInput"
+            , if Maybe.isJust e then "error" else ""
+            ])
+
+    let valueWithValidation = R.ffor value (\v -> (v, _in_validation input $ v))
+    inputError <- getInputError valueWithValidation validate
+
+    (textInput, resetClic) <- R.elDynAttr "div" containerAttr $ do
+
+      textInput <- R.el "label" $ do
+        textInput <- R.textInput $ R.def
+          & R.attributes .~ inputAttr
+          & R.setValue .~ resetValue
+          & R.textInputConfig_initialValue .~ (_in_initialValue input)
+          & R.textInputConfig_inputType .~ (_in_inputType input)
+
+        R.divClass "label" $
+          R.text (_in_label input)
+
+        return textInput
+
+      resetClic <-
+        if _in_hasResetButton input
+          then
+            Button._out_clic <$> (Button.view $
+              (Button.defaultIn Icon.cross)
+                { Button._in_class   = R.constDyn "reset"
+                , Button._in_tabIndex = Just (-1)
+                })
+          else
+            return R.never
+
+      R.divClass "errorMessage" $
+        R.dynText . fmap (Maybe.fromMaybe "") $ inputError
+
+      return (textInput, resetClic)
+
+  let enter = fmap (const ()) $ R.ffilter ((==) 13) . R._textInput_keypress $ textInput
+
+  return $ Out
+    { _out_raw = value
+    , _out_value = fmap snd valueWithValidation
+    , _out_enter = enter
+    }
+
+getInputError
+  :: forall t m a b c. MonadWidget t m
+  => Dynamic t (Text, Validation Text a)
+  -> Event t c
+  -> m (Dynamic t (Maybe Text))
+getInputError validatedValue validate = do
+  let errorDynamic = fmap (\(t, v) -> (t, validationError v)) validatedValue
+      errorEvent = R.updated errorDynamic
+  delayedError <- R.debounce (1 :: NominalDiffTime) errorEvent
+  fmap (fmap fst) $ R.foldDyn
+    (\event (err, hasBeenResetted) ->
+      case event of
+        ModifiedEvent t ->
+          (Nothing, T.null t)
+
+        ValidateEvent e ->
+          (e, False)
+
+        DelayEvent e ->
+          if hasBeenResetted then
+            (Nothing, False)
+          else
+            (e, False)
+    )
+    (Nothing, False)
+    (R.leftmost
+      [ fmap (\(t, _) -> ModifiedEvent t) errorEvent
+      , fmap (\(_, e) -> DelayEvent e) delayedError
+      , R.attachWith (\(_, e) _ -> ValidateEvent e) (R.current errorDynamic) validate
+      ])
+
+validationError :: (Validation Text a) -> Maybe Text
+validationError (Failure e) = Just e
+validationError _           = Nothing
+
+data InputEvent
+  = ModifiedEvent Text
+  | DelayEvent (Maybe Text)
+  | ValidateEvent (Maybe Text)
diff --git a/client/src/Component/Link.hs b/client/src/Component/Link.hs
new file mode 100644
index 0000000..1fd620e
--- /dev/null
+++ b/client/src/Component/Link.hs
@@ -0,0 +1,33 @@
+module Component.Link
+  ( view
+  ) where
+
+import           Data.Map   (Map)
+import qualified Data.Map   as M
+import           Data.Text  (Text)
+import qualified Data.Text  as T
+import           Reflex.Dom (Dynamic, MonadWidget)
+import qualified Reflex.Dom as R
+
+view :: forall t m a. MonadWidget t m => Text -> Dynamic t (Map Text Text) -> Text -> m ()
+view href inputAttrs content =
+  R.elDynAttr "a" attrs (R.text content)
+  where
+
+    onclickHandler =
+      T.intercalate ";"
+        [ "history.pushState(0, '', event.target.href)"
+        , "dispatchEvent(new PopStateEvent('popstate', {cancelable: true, bubbles: true, view: window}))"
+        , "return false"
+        ]
+
+    attrs =
+      R.ffor inputAttrs (\as ->
+        (M.union
+          (M.fromList
+            [ ("onclick", onclickHandler)
+            , ("href", href)
+            ]
+          )
+          as)
+      )
diff --git a/client/src/Component/Modal.hs b/client/src/Component/Modal.hs
new file mode 100644
index 0000000..46d3f64
--- /dev/null
+++ b/client/src/Component/Modal.hs
@@ -0,0 +1,117 @@
+module Component.Modal
+  ( In(..)
+  , Content
+  , view
+  ) where
+
+import           Control.Monad     (void)
+import qualified Data.Map          as M
+import qualified Data.Map.Lazy     as LM
+import           Data.Text         (Text)
+import qualified Data.Text         as T
+import           Data.Time.Clock   (NominalDiffTime)
+import qualified GHCJS.DOM.Element as Element
+import qualified GHCJS.DOM.Node    as Node
+import           JSDOM.Types       (JSString)
+import           Reflex.Dom        (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom        as R
+import qualified Reflex.Dom.Class  as R
+
+import qualified Util.Reflex       as ReflexUtil
+
+-- Content = CurtainClickEvent -> (CancelEvent, ConfirmEvent)
+type Content t m = Event t () -> m (Event t (), Event t ())
+
+data In t m = In
+  { _in_show    :: Event t ()
+  , _in_content :: Content t m
+  }
+
+view :: forall t m a. MonadWidget t m => In t m -> m (Event t ())
+view input = do
+  rec
+    let show = Show <$ (_in_show input)
+
+        startHiding =
+          R.attachWithMaybe
+            (\a _ -> if a then Just StartHiding else Nothing)
+            (R.current canBeHidden)
+            (R.leftmost [ hide, curtainClick ])
+
+    canBeHidden <-
+      R.holdDyn True $ R.leftmost
+        [ False <$ startHiding
+        , True <$ endHiding
+        ]
+
+    endHiding <-
+      R.delay (0.2 :: NominalDiffTime) (EndHiding <$ startHiding)
+
+    let action =
+          R.leftmost [ show, startHiding, endHiding ]
+
+    modalClass <-
+      R.holdDyn "" (fmap getModalClass action)
+
+    (elem, dyn) <-
+      R.buildElement "div" (getAttributes <$> modalClass) $
+        ReflexUtil.visibleIfEvent
+          (isVisible <$> action)
+          (R.blank >> return (R.never, R.never, R.never))
+          (do
+            (curtain, _) <- R.elAttr' "div" (M.singleton "class" "g-Modal__Curtain") $ R.blank
+            let curtainClick = R.domEvent R.Click curtain
+            (hide, content) <- R.divClass "g-Modal__Content" (_in_content input curtainClick)
+            return (curtainClick, hide, content))
+
+
+    performShowEffects action elem
+
+    let curtainClick = R.switchDyn $ (\(a, _, _) -> a) <$> dyn
+    let hide = R.switchDyn $ (\(_, b, _) -> b) <$> dyn
+    let content = R.switchDyn $ (\(_, _, c) -> c) <$> dyn
+
+  -- Delay the event in order to let time for the modal to disappear
+  R.delay (0.5 :: NominalDiffTime) content
+
+getAttributes :: Text -> LM.Map Text Text
+getAttributes modalClass =
+  M.singleton "class" $
+    T.intercalate " " [ "g-Modal", modalClass]
+
+performShowEffects
+  :: forall t m a. MonadWidget t m
+  => Event t Action
+  -> Element.Element
+  -> m ()
+performShowEffects showEvent elem = do
+  body <- ReflexUtil.getBody
+
+  let showEffects =
+        flip fmap showEvent (\case
+          Show -> do
+            Node.appendChild body elem
+            Element.setClassName body ("g-Body--Modal" :: JSString)
+          StartHiding ->
+            return ()
+          EndHiding -> do
+            Node.removeChild body elem
+            Element.setClassName body ("" :: JSString)
+        )
+
+  R.performEvent_ $ void `fmap` showEffects
+
+data Action
+  = Show
+  | StartHiding
+  | EndHiding
+
+getModalClass :: Action -> Text
+getModalClass Show        = "g-Modal--Show"
+getModalClass StartHiding = "g-Modal--Hiding"
+getModalClass _           = ""
+
+isVisible :: Action -> Bool
+isVisible Show        = True
+isVisible StartHiding = True
+isVisible EndHiding   = False
diff --git a/client/src/Component/ModalForm.hs b/client/src/Component/ModalForm.hs
new file mode 100644
index 0000000..c56ff88
--- /dev/null
+++ b/client/src/Component/ModalForm.hs
@@ -0,0 +1,71 @@
+module Component.ModalForm
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import           Data.Aeson         (ToJSON)
+import           Data.Text          (Text)
+import qualified Data.Text          as T
+import           Data.Time.Calendar (Day)
+import           Data.Validation    (Validation)
+import qualified Data.Validation    as V
+import           Reflex.Dom         (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom         as R
+
+import qualified Common.Msg         as Msg
+import qualified Component.Button   as Button
+import qualified Component.Form     as Form
+import qualified Util.Either        as EitherUtil
+import qualified Util.Validation    as ValidationUtil
+import qualified Util.WaitFor       as WaitFor
+
+data In m t a e = In
+  { _in_headerLabel :: Text
+  , _in_form        :: m (Dynamic t (Validation e a))
+  , _in_ajax        :: Event t a -> m (Event t (Either Text ()))
+  }
+
+data Out t = Out
+  { _out_hide     :: Event t ()
+  , _out_cancel   :: Event t ()
+  , _out_confirm  :: Event t ()
+  , _out_validate :: Event t ()
+  }
+
+view :: forall t m a e. (MonadWidget t m, ToJSON a) => In m t a e -> m (Out t)
+view input =
+  R.divClass "form" $ do
+    R.divClass "formHeader" $
+      R.text (_in_headerLabel input)
+
+    Form.view $
+      R.divClass "formContent" $ do
+        rec
+          form <- _in_form input
+
+          (validate, cancel, confirm) <- R.divClass "buttons" $ do
+            rec
+              cancel <- Button._out_clic <$> (Button.view $
+                (Button.defaultIn (R.text $ Msg.get Msg.Dialog_Undo))
+                  { Button._in_class = R.constDyn "undo" })
+
+              confirm <- Button._out_clic <$> (Button.view $
+                (Button.defaultIn (R.text $ Msg.get Msg.Dialog_Confirm))
+                  { Button._in_class = R.constDyn "confirm"
+                  , Button._in_waiting = waiting
+                  , Button._in_submit = True
+                  })
+
+              (validate, waiting) <- WaitFor.waitFor
+                (_in_ajax input)
+                (ValidationUtil.fireValidation form confirm)
+
+            return (R.fmapMaybe EitherUtil.eitherToMaybe validate, cancel, confirm)
+
+        return Out
+          { _out_hide = R.leftmost [ cancel, () <$ validate ]
+          , _out_cancel = cancel
+          , _out_confirm = confirm
+          , _out_validate = validate
+          }
diff --git a/client/src/Component/Pages.hs b/client/src/Component/Pages.hs
new file mode 100644
index 0000000..d54cd3d
--- /dev/null
+++ b/client/src/Component/Pages.hs
@@ -0,0 +1,86 @@
+module Component.Pages
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import qualified Data.Text        as T
+import           Reflex.Dom       (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom       as R
+
+import qualified Component.Button as Button
+
+import qualified Util.Reflex      as ReflexUtil
+import qualified View.Icon        as Icon
+
+data In t = In
+  { _in_total   :: Dynamic t Int
+  , _in_perPage :: Int
+  , _in_page    :: Int
+  }
+
+data Out t = Out
+  { _out_newPage     :: Event t Int
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m (Out t)
+view input = do
+  newPage <- ReflexUtil.divVisibleIf ((> 0) <$> (_in_total input)) $ pageButtons input
+
+  return $ Out
+    { _out_newPage = newPage
+    }
+
+pageButtons
+  :: forall t m. MonadWidget t m
+  => In t
+  -> m (Event t Int)
+pageButtons input = do
+  R.divClass "pages" $ do
+    rec
+      let newPage = R.leftmost
+            [ firstPageClic
+            , previousPageClic
+            , pageClic
+            , nextPageClic
+            , lastPageClic
+            ]
+
+      currentPage <- R.holdDyn (_in_page input) newPage
+
+      firstPageClic <- pageButton noCurrentPage (R.constDyn 1) Icon.doubleLeftBar
+
+      previousPageClic <- pageButton noCurrentPage (fmap (\x -> max (x - 1) 1) currentPage) Icon.doubleLeft
+
+      pageClic <- pageEvent <$> (R.simpleList (range <$> currentPage <*> maxPage) $ \p ->
+        pageButton (Just <$> currentPage) p (R.dynText $ fmap (T.pack . show) p))
+
+      nextPageClic <- pageButton noCurrentPage ((\c m -> min (c + 1) m) <$> currentPage <*> maxPage) Icon.doubleRight
+
+      lastPageClic <- pageButton noCurrentPage maxPage Icon.doubleRightBar
+
+    return newPage
+
+    where maxPage = R.ffor (_in_total input) (\t -> ceiling $ toRational t / toRational (_in_perPage input))
+          pageEvent = R.switch . R.current . fmap R.leftmost
+          noCurrentPage = R.constDyn Nothing
+
+range :: Int -> Int -> [Int]
+range currentPage maxPage = [start..end]
+  where sidePages = 2
+        start = max 1 (min (currentPage - sidePages) (maxPage - sidePages * 2))
+        end = min maxPage (start + sidePages * 2)
+
+pageButton :: forall t m. MonadWidget t m => Dynamic t (Maybe Int) -> Dynamic t Int -> m () -> m (Event t Int)
+pageButton currentPage page content = do
+  clic <- Button._out_clic <$> (Button.view $ Button.In
+    { Button._in_class   = do
+        cp <- currentPage
+        p <- page
+        if cp == Just p then "page current" else "page"
+    , Button._in_content = content
+    , Button._in_waiting = R.never
+    , Button._in_tabIndex = Nothing
+    , Button._in_submit = False
+    })
+  return . fmap fst $ R.attach (R.current page) clic
diff --git a/client/src/Component/Select.hs b/client/src/Component/Select.hs
new file mode 100644
index 0000000..70f5f58
--- /dev/null
+++ b/client/src/Component/Select.hs
@@ -0,0 +1,80 @@
+module Component.Select
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import           Data.Map        (Map)
+import qualified Data.Map        as M
+import qualified Data.Maybe      as Maybe
+import           Data.Text       (Text)
+import qualified Data.Text       as T
+import           Data.Validation (Validation)
+import           Reflex.Dom      (Dynamic, Event, MonadWidget, Reflex)
+import qualified Reflex.Dom      as R
+
+import qualified Util.Validation as ValidationUtil
+
+data (Reflex t) => In t a b c = In
+  { _in_label        :: Text
+  , _in_initialValue :: a
+  , _in_value        :: Event t a
+  , _in_values       :: Dynamic t (Map a Text)
+  , _in_reset        :: Event t b
+  , _in_isValid      :: a -> Validation Text a
+  , _in_validate     :: Event t c
+  }
+
+data Out t a = Out
+  { _out_raw   :: Dynamic t a
+  , _out_value :: Dynamic t (Validation Text a)
+  }
+
+view :: forall t m a b c. (Ord a, MonadWidget t m) => In t a b c -> m (Out t a)
+view input = do
+  rec
+    let containerAttr = R.ffor showedError (\e ->
+          M.singleton "class" $ T.intercalate " "
+            [ "input selectInput"
+            , if Maybe.isJust e then "error" else ""
+            ])
+
+        validatedValue =
+          fmap (_in_isValid input) value
+
+        maybeError =
+          fmap ValidationUtil.maybeError validatedValue
+
+    showedError <- R.holdDyn Nothing $ R.leftmost
+      [ Nothing <$ _in_reset input
+      , R.updated maybeError
+      , R.attachWith const (R.current maybeError) (_in_validate input)
+      ]
+
+    value <- R.elDynAttr "div" containerAttr $ do
+      let initialValue = _in_initialValue input
+
+      let setValue = R.leftmost
+            [ initialValue <$ (_in_reset input)
+            , _in_value input
+            ]
+
+      value <- R.el "label" $ do
+        R.divClass "label" $
+          R.text (_in_label input)
+
+        R._dropdown_value <$>
+          R.dropdown
+            initialValue
+            (_in_values input)
+            (R.def { R._dropdownConfig_setValue = setValue })
+
+      R.divClass "errorMessage" . R.dynText $
+        R.ffor showedError (Maybe.fromMaybe "")
+
+      return value
+
+  return Out
+    { _out_raw = value
+    , _out_value = validatedValue
+    }
diff --git a/client/src/Component/Table.hs b/client/src/Component/Table.hs
new file mode 100644
index 0000000..1482f91
--- /dev/null
+++ b/client/src/Component/Table.hs
@@ -0,0 +1,105 @@
+module Component.Table
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import qualified Data.Map         as M
+import           Data.Text        (Text)
+import           Reflex.Dom       (Event, MonadWidget)
+import qualified Reflex.Dom       as R
+
+import qualified Component.Button as Button
+import qualified Component.Modal  as Modal
+import qualified Util.Reflex      as ReflexUtil
+import qualified View.Icon        as Icon
+
+data In m t h r = In
+  { _in_headerLabel :: h -> Text
+  , _in_rows        :: [r]
+  , _in_cell        :: h -> r -> m ()
+  , _in_cloneModal  :: r -> Modal.Content t m
+  , _in_editModal   :: r -> Modal.Content t m
+  , _in_deleteModal :: r -> Modal.Content t m
+  , _in_canEdit     :: r -> Bool
+  , _in_canDelete   :: r -> Bool
+  }
+
+data Out t = Out
+  { _out_add    :: Event t ()
+  , _out_edit   :: Event t ()
+  , _out_delete :: Event t ()
+  }
+
+view :: forall t m h r. (MonadWidget t m, Bounded h, Enum h)  => In m t h r -> m (Out t)
+view input =
+  R.divClass "table" $ do
+    rec
+      result <- R.divClass "lines" $ do
+
+        R.divClass "header" $ do
+          flip mapM_ [minBound..] $ \header ->
+            R.divClass "cell" . R.text $
+              _in_headerLabel input header
+
+          R.divClass "cell" $ R.blank
+          R.divClass "cell" $ R.blank
+          R.divClass "cell" $ R.blank
+
+        flip mapM (_in_rows input) $ \row ->
+          R.divClass "row" $ do
+            flip mapM_ [minBound..] $ \header ->
+              R.divClass "cell" $
+                _in_cell input header row
+
+            cloneButton <-
+              R.divClass "cell button" $
+                Button._out_clic <$> (Button.view $
+                  Button.defaultIn Icon.clone)
+
+            clone <-
+              Modal.view $ Modal.In
+                { Modal._in_show    = cloneButton
+                , Modal._in_content = _in_cloneModal input row
+                }
+
+            let visibleIf cond =
+                  R.elAttr
+                    "div"
+                    (if cond then M.empty else M.singleton "style" "display:none")
+
+            editButton <-
+              R.divClass "cell button" $
+                visibleIf (_in_canEdit input row) $
+                  Button._out_clic <$> (Button.view $
+                    Button.defaultIn Icon.edit)
+
+            edit <-
+              Modal.view $ Modal.In
+                { Modal._in_show    = editButton
+                , Modal._in_content = _in_editModal input row
+                }
+
+            deleteButton <-
+              R.divClass "cell button" $
+                visibleIf (_in_canDelete input row) $
+                  Button._out_clic <$> (Button.view $
+                    Button.defaultIn Icon.delete)
+
+            delete <-
+              Modal.view $ Modal.In
+                { Modal._in_show    = deleteButton
+                , Modal._in_content = _in_deleteModal input row
+                }
+
+            return (clone, edit, delete)
+
+    let add = R.leftmost . map (\(a, _, _) -> a) $ result
+        edit = R.leftmost . map (\(_, a, _) -> a) $ result
+        delete = R.leftmost . map (\(_, _, a) -> a) $ result
+
+    return $ Out
+      { _out_add = add
+      , _out_edit = edit
+      , _out_delete = delete
+      }
diff --git a/client/src/Component/Tag.hs b/client/src/Component/Tag.hs
new file mode 100644
index 0000000..f75b8d3
--- /dev/null
+++ b/client/src/Component/Tag.hs
@@ -0,0 +1,27 @@
+module Component.Tag
+  ( In(..)
+  , view
+  ) where
+
+import qualified Data.Map   as M
+import           Data.Text  (Text)
+import qualified Data.Text  as T
+import           Reflex.Dom (MonadWidget)
+import qualified Reflex.Dom as R
+
+data In = In
+  { _in_text  :: Text
+  , _in_color :: Text
+  }
+
+view :: forall t m a. MonadWidget t m => In -> m ()
+view input =
+  R.elAttr "span" attrs $
+    R.text $ _in_text input
+
+  where
+    attrs =
+      M.fromList
+        [ ("class", "tag")
+        , ("style", T.concat [ "background-color: ", _in_color input ])
+        ]
diff --git a/client/src/Loadable.hs b/client/src/Loadable.hs
new file mode 100644
index 0000000..4806b08
--- /dev/null
+++ b/client/src/Loadable.hs
@@ -0,0 +1,109 @@
+module Loadable
+  ( Loadable (..)
+  , fromEither
+  , fromEvent
+  , viewHideValueWhileLoading
+  , viewShowValueWhileLoading
+  ) where
+
+import qualified Data.Map     as M
+import           Reflex.Dom   (MonadWidget)
+import qualified Reflex.Dom   as R
+
+import           Data.Functor (Functor)
+import           Data.Text    (Text)
+import           Reflex.Dom   (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom   as R
+
+data Loadable t
+  = Loading
+  | Error Text
+  | Loaded t
+  deriving (Eq, Show)
+
+instance Functor Loadable where
+  fmap f Loading    = Loading
+  fmap f (Error e)  = Error e
+  fmap f (Loaded x) = Loaded (f x)
+
+instance Applicative Loadable where
+  pure x = Loaded x
+
+  Loading <*> _ = Loading
+  (Error e) <*> _ = Error e
+  (Loaded f) <*> Loading = Loading
+  (Loaded f) <*> (Error e) = Error e
+  (Loaded f) <*> (Loaded x) = Loaded (f x)
+
+instance Monad Loadable where
+  Loading >>= f = Loading
+  (Error e) >>= f = Error e
+  (Loaded x) >>= f = f x
+
+fromEither :: forall a b. Either Text b -> Loadable b
+fromEither (Left err)    = Error err
+fromEither (Right value) = Loaded value
+
+fromEvent :: forall t m a. MonadWidget t m => Event t (Either Text a) -> m (Dynamic t (Loadable a))
+fromEvent =
+  R.foldDyn
+    (\res _ -> case res of
+      Left err -> Error err
+      Right t  -> Loaded t
+    )
+    Loading
+
+viewHideValueWhileLoading :: forall t m a b. MonadWidget t m => (a -> m b) -> Loadable a -> m (Maybe b)
+viewHideValueWhileLoading f loadable =
+  case loadable of
+    Loading ->
+      (R.divClass "pageSpinner" $ R.divClass "spinner" $ R.blank) >> return Nothing
+
+    Error err ->
+      R.text err >> return Nothing
+
+    Loaded x ->
+      Just <$> f x
+
+viewShowValueWhileLoading
+  :: forall t m a b. (MonadWidget t m, Eq a)
+  => Dynamic t (Loadable a)
+  -> (a -> m b)
+  -> m (Event t (Maybe b))
+viewShowValueWhileLoading loadable f = do
+
+  value <-
+    (R.foldDyn
+      (\l v1 ->
+        case l of
+          Loaded v2 -> Just v2
+          _         -> v1)
+      Nothing
+      (R.updated loadable)) >>= R.holdUniqDyn
+
+  withLoader (fmap ((==) Loading) loadable) $
+    R.dyn . R.ffor value $ \case
+      Nothing -> return Nothing
+      Just x -> Just <$> f x
+
+withLoader
+  :: forall t m a. MonadWidget t m
+  => Dynamic t Bool
+  -> m a
+  -> m a
+withLoader isLoading block =
+  R.divClass "g-Loadable" $ do
+    res <- R.elDynAttr "div" (blockAttrs <$> isLoading) $
+      block
+    R.elDynAttr "div" (spinnerAttrs <$> isLoading) $
+      R.divClass "spinner" R.blank
+    return res
+
+  where
+    spinnerAttrs l = M.singleton "class" $
+      "g-Loadable__Spinner"
+      <> (if l then " g-Loadable__Spinner--Loading" else "")
+
+    blockAttrs l = M.singleton "class" $
+      "g-Loadable__Content"
+      <> (if l then " g-Loadable__Content--Loading" else "")
diff --git a/client/src/Main.hs b/client/src/Main.hs
new file mode 100644
index 0000000..c71b0f0
--- /dev/null
+++ b/client/src/Main.hs
@@ -0,0 +1,39 @@
+module Main
+  ( main
+  ) where
+
+import qualified Data.Aeson                           as Aeson
+import qualified Data.ByteString.Lazy                 as LB
+import qualified Data.JSString.Text                   as Dom
+import qualified Data.Text.Encoding                   as T
+import qualified JSDOM                                as Dom
+import qualified JSDOM.Generated.HTMLElement          as Dom
+import qualified JSDOM.Generated.NonElementParentNode as Dom
+import           JSDOM.Types                          (HTMLElement (..), JSM,
+                                                       JSString)
+import qualified JSDOM.Types                          as Dom
+import           Prelude                              hiding (error, init)
+
+import           Common.Model                         (Init)
+import qualified Common.Msg                           as Msg
+
+import qualified View.App                             as App
+
+main :: JSM ()
+main = do
+  initResult <- readInit
+  App.widget initResult
+
+readInit :: JSM (Maybe Init)
+readInit = do
+  document <- Dom.currentDocumentUnchecked
+  initNode <- Dom.getElementById document ("init" :: JSString)
+
+  case initNode of
+    Just node -> do
+      text <- Dom.textFromJSString <$> Dom.getInnerText (Dom.uncheckedCastTo HTMLElement node)
+      return $ case Aeson.decode (LB.fromStrict . T.encodeUtf8 $ text) of
+        Just init -> init
+        Nothing   -> Nothing
+    _ ->
+      return Nothing
diff --git a/client/src/Model/Route.hs b/client/src/Model/Route.hs
new file mode 100644
index 0000000..f92e9be
--- /dev/null
+++ b/client/src/Model/Route.hs
@@ -0,0 +1,11 @@
+module Model.Route
+  ( Route(..)
+  ) where
+
+data Route
+  = RootRoute
+  | IncomeRoute
+  | CategoryRoute
+  | StatisticsRoute
+  | NotFoundRoute
+  deriving (Eq, Show)
diff --git a/client/src/Util/Ajax.hs b/client/src/Util/Ajax.hs
new file mode 100644
index 0000000..dcfd402
--- /dev/null
+++ b/client/src/Util/Ajax.hs
@@ -0,0 +1,139 @@
+module Util.Ajax
+  ( getNow
+  , get
+  , post
+  , postAndParseResult
+  , put
+  , putAndParseResult
+  , delete
+  ) where
+
+import           Control.Arrow        (left)
+import           Data.Aeson           (FromJSON, ToJSON)
+import qualified Data.Aeson           as Aeson
+import           Data.ByteString      (ByteString)
+import qualified Data.ByteString.Lazy as LBS
+import           Data.Default         (def)
+import qualified Data.Map.Lazy        as LM
+import           Data.Text            (Text)
+import qualified Data.Text            as T
+import qualified Data.Text.Encoding   as T
+import           Data.Time.Clock      (NominalDiffTime)
+import           Reflex.Dom           (Dynamic, Event, IsXhrPayload,
+                                       MonadWidget, XhrRequest,
+                                       XhrRequestConfig (..), XhrResponse,
+                                       XhrResponseHeaders (..))
+import qualified Reflex.Dom           as R
+
+import           Loadable             (Loadable)
+import qualified Loadable
+
+getNow :: forall t m a. (MonadWidget t m, FromJSON a) => Text -> m (Dynamic t (Loadable a))
+getNow url = do
+  postBuild <- R.getPostBuild
+  get (url <$ postBuild)
+    >>= R.debounce (0 :: NominalDiffTime) -- Fired 2 times otherwise
+    >>= Loadable.fromEvent
+
+get
+  :: forall t m a. (MonadWidget t m, FromJSON a)
+  => Event t Text
+  -> m (Event t (Either Text a))
+get url =
+  fmap getJsonResult <$>
+    R.performRequestAsync (R.ffor url $ \u -> jsonRequest "GET" u (Aeson.String ""))
+
+post
+  :: forall t m a. (MonadWidget t m, ToJSON a)
+  => Text
+  -> Event t a
+  -> m (Event t (Either Text ()))
+post url input =
+  fmap checkResult <$>
+    R.performRequestAsync (jsonRequest "POST" url <$> input)
+
+postAndParseResult
+  :: forall t m a b. (MonadWidget t m, ToJSON a, FromJSON b)
+  => Text
+  -> Event t a
+  -> m (Event t (Either Text b))
+postAndParseResult url input =
+  fmap getJsonResult <$>
+    R.performRequestAsync (jsonRequest "POST" url <$> input)
+
+put
+  :: forall t m a. (MonadWidget t m, ToJSON a)
+  => Text
+  -> Event t a
+  -> m (Event t (Either Text ()))
+put url input =
+  fmap checkResult <$>
+    R.performRequestAsync (jsonRequest "PUT" url <$> input)
+
+putAndParseResult
+  :: forall t m a b. (MonadWidget t m, ToJSON a, FromJSON b)
+  => Text
+  -> Event t a
+  -> m (Event t (Either Text b))
+putAndParseResult url input =
+  fmap getJsonResult <$>
+    R.performRequestAsync (jsonRequest "PUT" url <$> input)
+
+delete
+  :: forall t m a. (MonadWidget t m)
+  => Dynamic t Text
+  -> Event t ()
+  -> m (Event t (Either Text Text))
+delete url fire = do
+  fmap getResult <$>
+    (R.performRequestAsync $
+      R.attachWith (\u _ -> request "DELETE" u ()) (R.current url) fire)
+
+checkResult :: XhrResponse -> Either Text ()
+checkResult response =
+  () <$ getResult response
+
+getJsonResult :: forall a. (FromJSON a) => XhrResponse -> Either Text a
+getJsonResult response =
+  case getResult response of
+    Left l  -> Left l
+    Right r -> left T.pack . Aeson.eitherDecodeStrict $ (T.encodeUtf8 r)
+
+getResult :: XhrResponse -> Either Text Text
+getResult response =
+  case R._xhrResponse_responseText response of
+    Just responseText ->
+      if R._xhrResponse_status response == 200
+        then Right responseText
+        else Left responseText
+    _ -> Left "NoKey"
+
+request :: forall a. (IsXhrPayload a) => Text -> Text -> a -> XhrRequest a
+request method url payload =
+  let
+    config = XhrRequestConfig
+      { _xhrRequestConfig_headers = def
+      , _xhrRequestConfig_user = def
+      , _xhrRequestConfig_password = def
+      , _xhrRequestConfig_responseType = def
+      , _xhrRequestConfig_responseHeaders = def
+      , _xhrRequestConfig_withCredentials = False
+      , _xhrRequestConfig_sendData = payload
+      }
+  in
+    R.xhrRequest method url config
+
+jsonRequest :: forall a. (ToJSON a) => Text -> Text -> a -> XhrRequest ByteString
+jsonRequest method url payload =
+  let
+    config = XhrRequestConfig
+      { _xhrRequestConfig_headers = def
+      , _xhrRequestConfig_user = def
+      , _xhrRequestConfig_password = def
+      , _xhrRequestConfig_responseType = def
+      , _xhrRequestConfig_responseHeaders = def
+      , _xhrRequestConfig_withCredentials = False
+      , _xhrRequestConfig_sendData = LBS.toStrict $ Aeson.encode payload
+      }
+  in
+    R.xhrRequest method url config
diff --git a/client/src/Util/Css.hs b/client/src/Util/Css.hs
new file mode 100644
index 0000000..804b10f
--- /dev/null
+++ b/client/src/Util/Css.hs
@@ -0,0 +1,9 @@
+module Util.Css
+  ( classes
+  ) where
+
+import           Data.Text (Text)
+import qualified Data.Text as T
+
+classes :: [(Text, Bool)] -> Text
+classes = T.unwords . map fst . filter snd
diff --git a/client/src/Util/Either.hs b/client/src/Util/Either.hs
new file mode 100644
index 0000000..e76bc8a
--- /dev/null
+++ b/client/src/Util/Either.hs
@@ -0,0 +1,7 @@
+module Util.Either
+  ( eitherToMaybe
+  ) where
+
+eitherToMaybe :: forall a b. Either a b -> Maybe b
+eitherToMaybe (Right b) = Just b
+eitherToMaybe _         = Nothing
diff --git a/client/src/Util/Reflex.hs b/client/src/Util/Reflex.hs
new file mode 100644
index 0000000..aa5cebb
--- /dev/null
+++ b/client/src/Util/Reflex.hs
@@ -0,0 +1,59 @@
+module Util.Reflex
+  ( visibleIfDyn
+  , visibleIfEvent
+  , divVisibleIf
+  , divClassVisibleIf
+  , flatten
+  , flattenTuple
+  , getBody
+  ) where
+
+import qualified Data.Map                 as M
+import           Data.Text                (Text)
+import qualified GHCJS.DOM                as Dom
+import qualified GHCJS.DOM.Document       as Document
+import qualified GHCJS.DOM.HTMLCollection as HTMLCollection
+import           GHCJS.DOM.Types          (Element)
+import           Reflex.Dom               (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom               as R
+
+visibleIfDyn :: forall t m a. MonadWidget t m => Dynamic t Bool -> m a -> m a -> m (Event t a)
+visibleIfDyn cond empty content =
+  R.dyn $ R.ffor cond $ \case
+    True -> content
+    False -> empty
+
+visibleIfEvent :: forall t m a. MonadWidget t m => Event t Bool -> m a -> m a -> m (Dynamic t a)
+visibleIfEvent cond empty content =
+  R.widgetHold empty $
+    R.ffor cond $ \case
+      True -> content
+      False -> empty
+
+divVisibleIf :: forall t m a. MonadWidget t m => Dynamic t Bool -> m a -> m a
+divVisibleIf cond content = divClassVisibleIf cond "" content
+
+divClassVisibleIf :: forall t m a. MonadWidget t m => Dynamic t Bool -> Text -> m a -> m a
+divClassVisibleIf cond className content =
+  R.elDynAttr
+    "div"
+    (fmap (\c -> (M.singleton "class" className) `M.union` if c then M.empty else M.singleton "style" "display:none") cond)
+    content
+
+flatten :: forall t m a. MonadWidget t m => Event t (Event t a) -> m (Event t a)
+flatten e = do
+  dyn <- R.holdDyn R.never e
+  return $ R.switchDyn dyn
+
+flattenTuple
+  :: forall t m a b. MonadWidget t m
+  => Event t (Event t a, Event t b)
+  -> m (Event t a, Event t b)
+flattenTuple e = (,) <$> (flatten $ fmap fst e) <*> (flatten $ fmap snd e)
+
+getBody :: forall t m. MonadWidget t m => m Element
+getBody = do
+  document <- Dom.currentDocumentUnchecked
+  nodelist <- Document.getElementsByTagName document ("body" :: String)
+  Just body <- nodelist `HTMLCollection.item` 0
+  return body
diff --git a/client/src/Util/Router.hs b/client/src/Util/Router.hs
new file mode 100644
index 0000000..e9d0a1a
--- /dev/null
+++ b/client/src/Util/Router.hs
@@ -0,0 +1,266 @@
+{-# LANGUAGE CPP                      #-}
+{-# LANGUAGE ConstraintKinds          #-}
+{-# LANGUAGE FlexibleContexts         #-}
+{-# LANGUAGE ForeignFunctionInterface #-}
+{-# LANGUAGE JavaScriptFFI            #-}
+{-# LANGUAGE LambdaCase               #-}
+{-# LANGUAGE OverloadedStrings        #-}
+{-# LANGUAGE RankNTypes               #-}
+{-# LANGUAGE RecursiveDo              #-}
+{-# LANGUAGE ScopedTypeVariables      #-}
+{-# LANGUAGE TemplateHaskell          #-}
+{-# LANGUAGE TypeFamilies             #-}
+
+module Util.Router (
+  -- == High-level routers
+    route
+  , route'
+  , partialPathRoute
+
+  -- = Low-level URL bar access
+  , getLoc
+  , getURI
+  , getUrlText
+  , uriOrigin
+  , URI
+
+  -- = History movement
+  , goForward
+  , goBack
+  ) where
+
+------------------------------------------------------------------------------
+import           Control.Lens                  ((&), (.~), (^.))
+import           Control.Monad.Fix             (MonadFix)
+import qualified Data.ByteString.Char8         as BS
+import           Data.Monoid                   ((<>))
+import           Data.Text                     (Text)
+import qualified Data.Text                     as T
+import qualified Data.Text.Encoding            as T
+import           GHCJS.DOM                     (currentDocumentUnchecked,
+                                                currentWindowUnchecked)
+import           GHCJS.DOM.Document            (createEvent)
+import           GHCJS.DOM.Event               (initEvent)
+import           GHCJS.DOM.EventM              (on)
+import           GHCJS.DOM.EventTarget         (dispatchEvent_)
+import           GHCJS.DOM.History             (History, back, forward,
+                                                pushState)
+import           GHCJS.DOM.Location            (getHref)
+import           GHCJS.DOM.PopStateEvent
+import           GHCJS.DOM.Types               (Location (..),
+                                                PopStateEvent (..))
+import           GHCJS.DOM.Types               (MonadJSM, uncheckedCastTo)
+import qualified GHCJS.DOM.Types               as DOM
+import           GHCJS.DOM.Window              (getHistory, getLocation)
+import           GHCJS.DOM.WindowEventHandlers (popState)
+import           GHCJS.Foreign                 (isFunction)
+import           GHCJS.Marshal.Pure            (pFromJSVal)
+import           Language.Javascript.JSaddle   (JSM, Object (..), ghcjsPure,
+                                                liftJSM)
+import qualified Language.Javascript.JSaddle   as JS
+import           Reflex.Dom.Core               hiding (EventName, Window)
+import qualified URI.ByteString                as U
+------------------------------------------------------------------------------
+
+
+-------------------------------------------------------------------------------
+-- | Manipulate and track the URL 'GHCJS.DOM.Types.Location' for dynamic
+--   routing of a widget
+--   These sources of URL-bar change will be reflected in the output URI
+--     - Input events to 'route'
+--     - Browser Forward/Back button clicks
+--     - forward/back javascript calls (or 'goForward'/'goBack') Haskell calls
+--     - Any URL changes followed by a popState event
+--   But external calls to pushState that don't manually fire a popState
+--   won't be detected
+route
+ :: forall t m.
+  ( MonadHold t m
+  , PostBuild t m
+  , TriggerEvent t m
+  , PerformEvent t m
+  , HasJSContext m
+  , HasJSContext (Performable m)
+  , MonadJSM m
+  , MonadJSM (Performable m))
+  => Event t T.Text
+  -> m (Dynamic t (U.URIRef U.Absolute))
+route pushTo = do
+  loc0    <- getURI
+
+  _ <- performEvent $ ffor pushTo $ \t -> do
+    let newState = Just t
+    withHistory $ \h -> pushState h (0 :: Double) ("" :: T.Text) (newState :: Maybe T.Text)
+    liftJSM dispatchEvent'
+
+  locUpdates <- getPopState
+  holdDyn loc0 locUpdates
+
+route'
+ :: forall t m a b.
+  ( MonadHold t m
+  , PostBuild t m
+  , TriggerEvent t m
+  , PerformEvent t m
+  , HasJSContext m
+  , HasJSContext (Performable m)
+  , MonadJSM m
+  , MonadJSM (Performable m)
+  , MonadFix m)
+  => (URI -> a -> URI)
+  -> (URI -> b)
+  -> Event t a
+  -> m (Dynamic t b)
+route' encode decode routeUpdate = do
+  rec rUri <- route (T.decodeUtf8 . U.serializeURIRef' <$> urlUpdates)
+      let urlUpdates = attachWith encode (current rUri) routeUpdate
+  return $ decode <$> rUri
+
+
+-------------------------------------------------------------------------------
+-- | Route a single page app according to the part of the path after
+--   pathBase
+partialPathRoute
+ :: forall t m.
+  ( MonadHold t m
+  , PostBuild t m
+  , DomBuilder t m
+  , TriggerEvent t m
+  , PerformEvent t m
+  , HasJSContext m
+  , HasJSContext (Performable m)
+  , MonadJSM m
+  , MonadJSM (Performable m)
+  , MonadFix m)
+  => T.Text  -- ^ The path segments not related to SPA routing
+             --   (leading '/' will be added automaticaly)
+  -> Event t T.Text -- ^ Updates to the path segments used for routing
+                    --   These values will be appended to the base path
+  -> m (Dynamic t [T.Text]) -- ^ Path segments used for routing
+partialPathRoute pathBase pathUpdates = do
+  route' (flip updateUrl) parseParts pathUpdates
+  where
+
+    rootPathBase :: T.Text
+    rootPathBase =
+      if T.null pathBase then
+        ""
+      else
+        "/" <> cleanT pathBase
+
+    toPath :: T.Text -> BS.ByteString
+    toPath dynpath = T.encodeUtf8 $ rootPathBase <> "/" <> cleanT dynpath
+
+    updateUrl :: T.Text -> URI -> URI
+    updateUrl updateParts u = u & U.pathL .~ toPath updateParts
+
+    parseParts :: URI -> [T.Text]
+    parseParts u =
+      maybe (error $ pfxErr u pathBase)
+            (T.splitOn "/" . T.decodeUtf8 . cleanB) .
+      BS.stripPrefix (T.encodeUtf8 $ cleanT pathBase) $
+      cleanB (u ^. U.pathL)
+
+    cleanT = T.dropWhile (=='/')
+    cleanB = BS.dropWhile (== '/')
+
+
+-------------------------------------------------------------------------------
+uriOrigin :: U.URIRef U.Absolute -> T.Text
+uriOrigin r = T.decodeUtf8 $ U.serializeURIRef' r'
+  where
+    r' = r { U.uriPath = mempty
+           , U.uriQuery = mempty
+           , U.uriFragment = mempty
+           }
+
+
+-------------------------------------------------------------------------------
+getPopState
+ :: forall t m.
+  ( MonadHold t m
+  , TriggerEvent t m
+  , MonadJSM m) => m (Event t URI)
+getPopState = do
+  window <- currentWindowUnchecked
+  wrapDomEventMaybe window (`on` popState) $ do
+    loc <- getLocation window
+    locStr <- getHref loc
+    return . hush $ U.parseURI U.laxURIParserOptions (T.encodeUtf8 locStr)
+
+
+-------------------------------------------------------------------------------
+goForward :: (HasJSContext m, MonadJSM m) => m ()
+goForward = withHistory forward
+
+
+-------------------------------------------------------------------------------
+goBack :: (HasJSContext m, MonadJSM m) => m ()
+goBack = withHistory back
+
+
+-------------------------------------------------------------------------------
+withHistory :: (HasJSContext m, MonadJSM m) => (History -> m a) -> m a
+withHistory act = do
+  w <- currentWindowUnchecked
+  h <- getHistory w
+  act h
+
+
+-------------------------------------------------------------------------------
+-- | (Unsafely) get the 'GHCJS.DOM.Location.Location' of a window
+getLoc :: (HasJSContext m, MonadJSM m) => m Location
+getLoc = do
+  win <- currentWindowUnchecked
+  loc <- getLocation win
+  return loc
+
+
+-------------------------------------------------------------------------------
+-- | (Unsafely) get the URL text of a window
+getUrlText :: (HasJSContext m, MonadJSM m) => m T.Text
+getUrlText = getLoc >>= getHref
+
+
+-------------------------------------------------------------------------------
+type URI = U.URIRef U.Absolute
+
+
+-------------------------------------------------------------------------------
+getURI :: (HasJSContext m, MonadJSM m) => m URI
+getURI = do
+  l <- getUrlText
+  return $ either (error "No parse of window location") id .
+    U.parseURI U.laxURIParserOptions $ T.encodeUtf8 l
+
+
+dispatchEvent' :: JSM ()
+dispatchEvent' = do
+  window <- currentWindowUnchecked
+  obj@(Object o) <- JS.create
+  JS.objSetPropertyByName obj ("cancelable" :: Text) True
+  JS.objSetPropertyByName obj ("bubbles" :: Text) True
+  JS.objSetPropertyByName obj ("view" :: Text) window
+  event <- JS.jsg ("PopStateEvent" :: Text) >>= ghcjsPure . isFunction >>= \case
+    True -> newPopStateEvent ("popstate" :: Text) $ Just $ pFromJSVal o
+    False -> do
+      doc <- currentDocumentUnchecked
+      event <- createEvent doc ("PopStateEvent" :: Text)
+      initEvent event ("popstate" :: Text) True True
+      JS.objSetPropertyByName obj ("view" :: Text) window
+      return $ uncheckedCastTo PopStateEvent event
+
+  dispatchEvent_ window event
+
+
+-------------------------------------------------------------------------------
+hush :: Either e a -> Maybe a
+hush (Right a) = Just a
+hush _         = Nothing
+
+
+-------------------------------------------------------------------------------
+pfxErr :: URI -> T.Text -> String
+pfxErr pn pathBase =
+  T.unpack $ "Encountered path (" <> T.decodeUtf8 (U.serializeURIRef' pn)
+            <> ") without expected prefix (" <> pathBase <> ")"
diff --git a/client/src/Util/Validation.hs b/client/src/Util/Validation.hs
new file mode 100644
index 0000000..50f2468
--- /dev/null
+++ b/client/src/Util/Validation.hs
@@ -0,0 +1,36 @@
+module Util.Validation
+  ( nelError
+  , toMaybe
+  , maybeError
+  , fireValidation
+  ) where
+
+import           Control.Monad      (join)
+import           Data.List.NonEmpty (NonEmpty)
+import qualified Data.List.NonEmpty as NEL
+import           Data.Text          (Text)
+import           Data.Validation    (Validation (Failure, Success))
+import qualified Data.Validation    as Validation
+import           Reflex.Dom         (Dynamic, Event, Reflex)
+import qualified Reflex.Dom         as R
+
+nelError :: Validation a b -> Validation (NonEmpty a) b
+nelError = Validation.validation (Failure . NEL.fromList . (:[])) Success
+
+toMaybe :: Validation a b -> Maybe b
+toMaybe (Success s) = Just s
+toMaybe (Failure _) = Nothing
+
+maybeError :: Validation a b -> Maybe a
+maybeError (Success _) = Nothing
+maybeError (Failure e) = Just e
+
+fireValidation
+  :: forall t a b c. Reflex t
+  => Dynamic t (Validation a b)
+  -> Event t c
+  -> Event t b
+fireValidation value validate =
+  R.fmapMaybe
+    (Validation.validation (const Nothing) Just)
+    (R.tag (R.current value) validate)
diff --git a/client/src/Util/WaitFor.hs b/client/src/Util/WaitFor.hs
new file mode 100644
index 0000000..fe7b733
--- /dev/null
+++ b/client/src/Util/WaitFor.hs
@@ -0,0 +1,17 @@
+module Util.WaitFor
+  ( waitFor
+  ) where
+
+import           Data.Time  (NominalDiffTime)
+import           Reflex.Dom (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom as R
+
+waitFor
+  :: forall t m a b. MonadWidget t m
+  => (Event t a -> m (Event t b))
+  -> Event t a
+  -> m (Event t b, Event t Bool)
+waitFor op input = do
+  result <- op input >>= R.debounce (0.5 :: NominalDiffTime)
+  let waiting = R.leftmost [ True <$ input , False <$ result ]
+  return (result, waiting)
diff --git a/client/src/View/App.hs b/client/src/View/App.hs
new file mode 100644
index 0000000..71f0234
--- /dev/null
+++ b/client/src/View/App.hs
@@ -0,0 +1,108 @@
+module View.App
+  ( widget
+  ) where
+
+import qualified Data.Text                  as T
+import           Prelude                    hiding (error, init)
+import           Reflex.Dom                 (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom                 as R
+
+import           Common.Model               (Currency, Init (..), UserId)
+import qualified Common.Msg                 as Msg
+
+import           Model.Route                (Route (..))
+import qualified Util.Reflex                as ReflexUtil
+import qualified Util.Router                as Router
+import qualified View.Category.Category     as Category
+import qualified View.Header                as Header
+import qualified View.Income.Income         as Income
+import qualified View.NotFound              as NotFound
+import qualified View.Payment.Payment       as Payment
+import qualified View.SignIn                as SignIn
+import qualified View.Statistics.Statistics as Statistics
+
+widget :: Maybe Init -> IO ()
+widget init =
+  R.mainWidget $ R.divClass "app" $ do
+
+    route <- getRoute
+
+    rec
+      header <- Header.view $ Header.In
+        { Header._in_init = initState
+        , Header._in_route = route
+        }
+
+      initState <-
+        R.foldDyn
+          const
+          init
+          (R.leftmost $
+            [ initEvent
+            , Nothing <$ (Header._out_signOut header)
+            ])
+
+      initEvent <-
+        (R.dyn . R.ffor initState $ \case
+          Nothing -> do
+            signIn <- SignIn.view
+            return (Just <$> SignIn._out_success signIn)
+
+          Just i -> do
+            signedWidget i route
+            return R.never) >>= ReflexUtil.flatten
+
+    return ()
+
+signedWidget :: forall t m. MonadWidget t m => Init -> Dynamic t Route -> m ()
+signedWidget init route = do
+  R.dyn . R.ffor route $ \case
+    RootRoute ->
+      Payment.view $ Payment.In
+        { Payment._in_currentUser = _init_currentUser init
+        , Payment._in_currency = _init_currency init
+        , Payment._in_users = _init_users init
+        }
+
+    IncomeRoute ->
+      Income.view $ Income.In
+        { Income._in_currentUser = _init_currentUser init
+        , Income._in_currency = _init_currency init
+        , Income._in_users = _init_users init
+        }
+
+    CategoryRoute ->
+      Category.view $ Category.In
+        { Category._in_currentUser = _init_currentUser init
+        , Category._in_currency = _init_currency init
+        , Category._in_users = _init_users init
+        }
+
+    StatisticsRoute ->
+      Statistics.view $ Statistics.In
+        { Statistics._in_currency = _init_currency init
+        }
+
+    NotFoundRoute ->
+      NotFound.view
+
+  return ()
+
+getRoute :: forall t m. MonadWidget t m => m (Dynamic t Route)
+getRoute = do
+  r <- Router.partialPathRoute "" . R.switchPromptlyDyn =<< R.holdDyn R.never R.never
+  return . R.ffor r $ \case
+    [""] ->
+      RootRoute
+
+    ["income"] ->
+      IncomeRoute
+
+    ["category"] ->
+      CategoryRoute
+
+    ["statistics"] ->
+      StatisticsRoute
+
+    _ ->
+      NotFoundRoute
diff --git a/client/src/View/Category/Category.hs b/client/src/View/Category/Category.hs
new file mode 100644
index 0000000..5b41bb6
--- /dev/null
+++ b/client/src/View/Category/Category.hs
@@ -0,0 +1,94 @@
+{-# LANGUAGE ExplicitForAll #-}
+
+module View.Category.Category
+  ( view
+  , In(..)
+  ) where
+
+import           Data.Aeson            (FromJSON)
+import qualified Data.Maybe            as Maybe
+import qualified Data.Text             as T
+import           Reflex.Dom            (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom            as R
+
+import           Common.Model          (Category, CategoryPage (..), Currency,
+                                        User, UserId)
+import qualified Common.Msg            as Msg
+
+import qualified Component.Button      as Button
+import qualified Component.Modal       as Modal
+import qualified Component.Pages       as Pages
+import           Loadable              (Loadable (..))
+import qualified Loadable
+import qualified Util.Ajax             as AjaxUtil
+import qualified Util.Reflex           as ReflexUtil
+import qualified Util.Reflex           as ReflexUtil
+import qualified View.Category.Form    as Form
+import qualified View.Category.Reducer as Reducer
+import qualified View.Category.Table   as Table
+
+data In t = In
+  { _in_users       :: [User]
+  , _in_currentUser :: UserId
+  , _in_currency    :: Currency
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m ()
+view input = do
+  rec
+    categoryPage <- Reducer.reducer $ Reducer.In
+      { Reducer._in_page         = page
+      , Reducer._in_addCategory    = R.leftmost [ headerAddCategory, tableAddCategory ]
+      , Reducer._in_editCategory   = editCategory
+      , Reducer._in_deleteCategory = deleteCategory
+      }
+
+    let eventFromResult :: forall a. ((Event t (), Table.Out t, Pages.Out t) -> Event t a) -> m (Event t a)
+        eventFromResult op = ReflexUtil.flatten $ (Maybe.fromMaybe R.never . fmap op) <$> result
+
+    page <- eventFromResult $ Pages._out_newPage . (\(_, _, c) -> c)
+    headerAddCategory <- eventFromResult $ (\(a, _, _) -> a)
+    tableAddCategory <- eventFromResult $ Table._out_add . (\(_, b, _) -> b)
+    editCategory <- eventFromResult $ Table._out_edit . (\(_, b, _) -> b)
+    deleteCategory <- eventFromResult $ Table._out_delete . (\(_, b, _) -> b)
+
+    result <- Loadable.viewShowValueWhileLoading categoryPage $
+      \(CategoryPage page categories usedCategories count) -> do
+        header <- headerView
+
+        table <- Table.view $ Table.In
+          { Table._in_currentUser = _in_currentUser input
+          , Table._in_currency = _in_currency input
+          , Table._in_categories = categories
+          , Table._in_usedCategories = usedCategories
+          , Table._in_users = _in_users input
+          }
+
+        pages <- Pages.view $ Pages.In
+          { Pages._in_total = R.constDyn count
+          , Pages._in_perPage = Reducer.perPage
+          , Pages._in_page = page
+          }
+
+        return (header, table, pages)
+
+  return ()
+
+headerView :: forall t m. MonadWidget t m => m (Event t ())
+headerView =
+  R.divClass "withMargin" $
+    R.divClass "titleButton" $ do
+      R.el "h1" $
+        R.text $
+          Msg.get Msg.Category_Title
+
+      addCategory <- Button._out_clic <$>
+        (Button.view . Button.defaultIn . R.text $
+          Msg.get Msg.Category_Add)
+
+      addCategory <- Modal.view $ Modal.In
+        { Modal._in_show    = addCategory
+        , Modal._in_content = Form.view $ Form.In { Form._in_operation = Form.New }
+        }
+
+      return addCategory
diff --git a/client/src/View/Category/Form.hs b/client/src/View/Category/Form.hs
new file mode 100644
index 0000000..d91fc2e
--- /dev/null
+++ b/client/src/View/Category/Form.hs
@@ -0,0 +1,117 @@
+module View.Category.Form
+  ( view
+  , In(..)
+  , Operation(..)
+  ) where
+
+import           Control.Monad.IO.Class     (liftIO)
+import           Data.Aeson                 (Value)
+import qualified Data.Aeson                 as Aeson
+import qualified Data.Maybe                 as Maybe
+import           Data.Text                  (Text)
+import qualified Data.Text                  as T
+import qualified Data.Time.Calendar         as Calendar
+import qualified Data.Time.Clock            as Time
+import           Data.Validation            (Validation)
+import qualified Data.Validation            as V
+import           Reflex.Dom                 (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom                 as R
+
+import           Common.Model               (Category (..),
+                                             CreateCategoryForm (..),
+                                             EditCategoryForm (..))
+import qualified Common.Msg                 as Msg
+import qualified Common.Util.Time           as TimeUtil
+import qualified Common.Validation.Category as CategoryValidation
+import qualified Component.Input            as Input
+import qualified Component.Modal            as Modal
+import qualified Component.ModalForm        as ModalForm
+import qualified Util.Ajax                  as Ajax
+
+data In = In
+  { _in_operation :: Operation
+  }
+
+data Operation
+  = New
+  | Clone Category
+  | Edit Category
+
+view :: forall t m a. MonadWidget t m => In -> Modal.Content t m
+view input cancel = do
+
+  rec
+    let reset = R.leftmost
+          [ "" <$ ModalForm._out_cancel modalForm
+          , "" <$ ModalForm._out_validate modalForm
+          , "" <$ cancel
+          ]
+
+    modalForm <- ModalForm.view $ ModalForm.In
+      { ModalForm._in_headerLabel = headerLabel
+      , ModalForm._in_ajax        = ajax "/api/category"
+      , ModalForm._in_form        = form reset (ModalForm._out_confirm modalForm)
+      }
+
+  return (ModalForm._out_hide modalForm, ModalForm._out_validate modalForm)
+
+  where
+
+    form
+      :: Event t String
+      -> Event t ()
+      -> m (Dynamic t (Validation Text Value))
+    form reset confirm = do
+      name <- Input._out_raw <$> (Input.view
+        (Input.defaultIn
+          { Input._in_label = Msg.get Msg.Category_Name
+          , Input._in_initialValue = name
+          , Input._in_validation = CategoryValidation.name
+          })
+        (name <$ reset)
+        confirm)
+
+      color <- Input._out_raw <$> (Input.view
+        (Input.defaultIn
+          { Input._in_label = Msg.get Msg.Category_Color
+          , Input._in_initialValue = color
+          , Input._in_inputType = "color"
+          , Input._in_hasResetButton = False
+          , Input._in_validation = CategoryValidation.color
+          })
+        (color <$ reset)
+        confirm)
+
+      return $ do
+        n <- name
+        c <- color
+        return . V.Success $ mkPayload n c
+
+    op = _in_operation input
+
+    name =
+      case op of
+        New     -> ""
+        Clone c -> _category_name c
+        Edit c  -> _category_name c
+
+    color =
+      case op of
+        New     -> ""
+        Clone c -> _category_color c
+        Edit c  -> _category_color c
+
+    ajax =
+      case op of
+        Edit _ -> Ajax.put
+        _      -> Ajax.post
+
+    headerLabel =
+      case op of
+        Edit _ -> Msg.get Msg.Category_Edit
+        _      -> Msg.get Msg.Category_Add
+
+    mkPayload =
+      case op of
+        Edit i -> \a b -> Aeson.toJSON $ EditCategoryForm (_category_id i) a b
+        _      -> \a b -> Aeson.toJSON $ CreateCategoryForm a b
diff --git a/client/src/View/Category/Reducer.hs b/client/src/View/Category/Reducer.hs
new file mode 100644
index 0000000..5ad0ddb
--- /dev/null
+++ b/client/src/View/Category/Reducer.hs
@@ -0,0 +1,59 @@
+module View.Category.Reducer
+  ( perPage
+  , reducer
+  , In(..)
+  ) where
+
+import           Data.Text    (Text)
+import qualified Data.Text    as T
+import           Reflex.Dom   (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom   as R
+
+import           Common.Model (CategoryPage)
+
+import           Loadable     (Loadable (..))
+import qualified Loadable     as Loadable
+import qualified Util.Ajax    as AjaxUtil
+import qualified Util.Either  as EitherUtil
+
+perPage :: Int
+perPage = 7
+
+data In t a b c = In
+  { _in_page           :: Event t Int
+  , _in_addCategory    :: Event t a
+  , _in_editCategory   :: Event t b
+  , _in_deleteCategory :: Event t c
+  }
+
+reducer :: forall t m a b c. MonadWidget t m => In t a b c -> m (Dynamic t (Loadable CategoryPage))
+reducer input = do
+
+  postBuild <- R.getPostBuild
+
+  currentPage <- R.holdDyn 1 (_in_page input)
+
+  let loadPage =
+        R.leftmost
+          [ 1 <$ postBuild
+          , _in_page input
+          , 1 <$ _in_addCategory input
+          , R.tag (R.current currentPage) (_in_editCategory input)
+          , R.tag (R.current currentPage) (_in_deleteCategory input)
+          ]
+
+  getResult <- AjaxUtil.get $ fmap pageUrl loadPage
+
+  R.holdDyn
+    Loading
+    (R.leftmost
+      [ Loading <$ loadPage
+      , Loadable.fromEither <$> getResult
+      ])
+
+  where
+    pageUrl p =
+      "api/categories?page="
+      <> (T.pack . show $ p)
+      <> "&perPage="
+      <> (T.pack . show $ perPage)
diff --git a/client/src/View/Category/Table.hs b/client/src/View/Category/Table.hs
new file mode 100644
index 0000000..90d013d
--- /dev/null
+++ b/client/src/View/Category/Table.hs
@@ -0,0 +1,93 @@
+module View.Category.Table
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import qualified Data.Maybe              as Maybe
+import           Data.Text               (Text)
+import qualified Data.Text               as T
+import           Reflex.Dom              (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom              as R
+
+import           Common.Model            (Category (..), CategoryId, Currency,
+                                          User (..), UserId)
+import qualified Common.Model            as CM
+import qualified Common.Msg              as Msg
+import qualified Common.View.Format      as Format
+
+import qualified Component.ConfirmDialog as ConfirmDialog
+import qualified Component.Table         as Table
+import qualified Component.Tag           as Tag
+import qualified Util.Ajax               as Ajax
+import qualified Util.Either             as EitherUtil
+import qualified View.Category.Form      as Form
+
+data In t = In
+  { _in_currentUser    :: UserId
+  , _in_currency       :: Currency
+  , _in_categories     :: [Category]
+  , _in_usedCategories :: [CategoryId]
+  , _in_users          :: [User]
+  }
+
+data Out t = Out
+  { _out_add    :: Event t ()
+  , _out_edit   :: Event t ()
+  , _out_delete :: Event t ()
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m (Out t)
+view input = do
+
+  table <- Table.view $ Table.In
+    { Table._in_headerLabel = headerLabel
+    , Table._in_rows = _in_categories input
+    , Table._in_cell = cell (_in_users input) (_in_currency input)
+    , Table._in_cloneModal = \category ->
+      Form.view $ Form.In
+        { Form._in_operation = Form.Clone category
+        }
+    , Table._in_editModal = \category ->
+      Form.view $ Form.In
+        { Form._in_operation = Form.Edit category
+        }
+    , Table._in_deleteModal = \category ->
+      ConfirmDialog.view $ ConfirmDialog.In
+        { ConfirmDialog._in_header  = Msg.get Msg.Category_DeleteConfirm
+        , ConfirmDialog._in_confirm = \e -> do
+          res <- Ajax.delete
+            (R.constDyn $ T.concat ["/api/category/", T.pack . show $ _category_id category])
+            e
+          return $ () <$ R.fmapMaybe EitherUtil.eitherToMaybe res
+        }
+    , Table._in_canEdit = const True
+    , Table._in_canDelete = not . flip elem (_in_usedCategories input) . _category_id
+    }
+
+  return $ Out
+    { _out_add = Table._out_add table
+    , _out_edit = Table._out_edit table
+    , _out_delete = Table._out_delete table
+    }
+
+data Header
+  = NameHeader
+  | ColorHeader
+  deriving (Eq, Show, Bounded, Enum)
+
+headerLabel :: Header -> Text
+headerLabel NameHeader  = Msg.get Msg.Category_Name
+headerLabel ColorHeader = Msg.get Msg.Category_Color
+
+cell :: forall t m. MonadWidget t m => [User] -> Currency -> Header -> Category -> m ()
+cell users currency header category =
+  case header of
+    NameHeader ->
+      R.text $ _category_name category
+
+    ColorHeader ->
+      Tag.view $ Tag.In
+        { Tag._in_text = _category_name category
+        , Tag._in_color = _category_color category
+        }
diff --git a/client/src/View/Header.hs b/client/src/View/Header.hs
new file mode 100644
index 0000000..ff9f40a
--- /dev/null
+++ b/client/src/View/Header.hs
@@ -0,0 +1,123 @@
+module View.Header
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import           Data.Map         (Map)
+import qualified Data.Map         as M
+import qualified Data.Maybe       as Maybe
+import           Data.Text        (Text)
+import qualified Data.Text        as T
+import           Data.Time        (NominalDiffTime)
+import           Prelude          hiding (error, init)
+import           Reflex.Dom       (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom       as R
+
+import           Common.Model     (Init (..), User (..))
+import qualified Common.Model     as CM
+import qualified Common.Msg       as Msg
+import qualified Component.Button as Button
+import qualified Component.Link   as Link
+import           Model.Route      (Route (..))
+import qualified Util.Css         as CssUtil
+import qualified Util.Reflex      as ReflexUtil
+import qualified View.Icon        as Icon
+
+data In t = In
+  { _in_init  :: Dynamic t (Maybe Init)
+  , _in_route :: Dynamic t Route
+  }
+
+data Out t = Out
+  { _out_signOut :: Event t ()
+  }
+
+view :: forall t m. MonadWidget t m => (In t) -> m (Out t)
+view input =
+  R.el "header" $ do
+
+    R.divClass "title" $
+      R.text $ Msg.get Msg.App_Title
+
+    let showLinks = Maybe.isJust <$> _in_init input
+
+    signOut <- R.el "div" $ do
+      ReflexUtil.visibleIfDyn showLinks R.blank (links $ _in_route input)
+      (R.dyn $ nameSignOut <$> _in_init input) >>= ReflexUtil.flatten
+
+    return $ Out
+      { _out_signOut = signOut
+      }
+
+links :: forall t m. MonadWidget t m => Dynamic t Route -> m ()
+links route = do
+  Link.view
+    "/"
+    (R.ffor route (attrs RootRoute))
+    (Msg.get Msg.Payment_Title)
+
+  Link.view
+    "/income"
+    (R.ffor route (attrs IncomeRoute))
+    (Msg.get Msg.Income_Title)
+
+  Link.view
+    "/category"
+    (R.ffor route (attrs CategoryRoute))
+    (Msg.get Msg.Category_Title)
+
+  Link.view
+    "/statistics"
+    (R.ffor route (attrs StatisticsRoute))
+    (Msg.get Msg.Statistics_Title)
+
+  where
+    attrs linkRoute currentRoute =
+      M.singleton "class" $
+        CssUtil.classes
+          [ ("item", True)
+          , ("current", linkRoute == currentRoute)
+          ]
+
+nameSignOut :: forall t m. MonadWidget t m => Maybe Init -> m (Event t ())
+nameSignOut init =
+  case init of
+    Just init -> do
+      rec
+        attr <- R.holdDyn
+          (M.singleton "class" "nameSignOut")
+          (fmap (const $ M.fromList [("style", "visibility: hidden"), ("class", "nameSignOut")]) signOut)
+
+        signOut <- R.elDynAttr "nameSignOut" attr $ do
+          case CM.findUser (_init_currentUser init) (_init_users init) of
+            Just user -> R.divClass "name" $ R.text (_user_name user)
+            Nothing   -> R.blank
+          signOutButton
+
+      return signOut
+    _ ->
+      return R.never
+
+signOutButton :: forall t m. MonadWidget t m => m (Event t ())
+signOutButton = do
+  rec
+    signOut <- Button.view $
+      (Button.defaultIn Icon.signOut)
+        { Button._in_class = R.constDyn "signOut item"
+        , Button._in_waiting = waiting
+        }
+    let signOutClic = Button._out_clic signOut
+        waiting = R.leftmost
+          [ fmap (const True) signOutClic
+          , fmap (const False) signOutSuccess
+          ]
+    signOutSuccess <- askSignOut signOutClic >>= R.debounce (0.5 :: NominalDiffTime)
+
+  return . fmap (const ()) . R.ffilter (== True) $ signOutSuccess
+
+  where askSignOut :: forall t m. MonadWidget t m => Event t () -> m (Event t Bool)
+        askSignOut signOut =
+          fmap getResult <$> R.performRequestAsync xhrRequest
+          where xhrRequest = fmap (const $ R.postJson "/api/signOut" ()) signOut
+                getResult = (== 200) . R._xhrResponse_status
diff --git a/client/src/View/Icon.hs b/client/src/View/Icon.hs
new file mode 100644
index 0000000..cc2ef3f
--- /dev/null
+++ b/client/src/View/Icon.hs
@@ -0,0 +1,71 @@
+module View.Icon
+  ( clone
+  , cross
+  , delete
+  , edit
+  , loading
+  , doubleLeft
+  , doubleLeftBar
+  , doubleRight
+  , doubleRightBar
+  , signOut
+  ) where
+
+import           Data.Map   (Map)
+import qualified Data.Map   as M
+import           Data.Text  (Text)
+import           Reflex.Dom (MonadWidget)
+import qualified Reflex.Dom as R
+
+clone :: forall t m. MonadWidget t m => m ()
+clone =
+  svgAttr "svg" (M.fromList [ ("width", "24"), ("height", "24"), ("viewBox", "0 0 24 24") ]) $
+    svgAttr "path" (M.fromList [("d", "M15.143 13.244l.837-2.244 2.698 5.641-5.678 2.502.805-2.23s-8.055-3.538-7.708-10.913c2.715 5.938 9.046 7.244 9.046 7.244zm8.857-7.244v18h-18v-6h-6v-18h18v6h6zm-2 2h-12.112c-.562-.578-1.08-1.243-1.521-2h7.633v-4h-14v14h4v-3.124c.6.961 1.287 1.823 2 2.576v6.548h14v-14z")]) $ R.blank
+
+cross :: forall t m. MonadWidget t m => m ()
+cross =
+  svgAttr "svg" (M.fromList [ ("width", "15"), ("height", "15"), ("viewBox", "0 0 1792 1792") ]) $
+    svgAttr "path" (M.fromList [("d", "M1490 1322q0 40-28 68l-136 136q-28 28-68 28t-68-28l-294-294-294 294q-28 28-68 28t-68-28l-136-136q-28-28-28-68t28-68l294-294-294-294q-28-28-28-68t28-68l136-136q28-28 68-28t68 28l294 294 294-294q28-28 68-28t68 28l136 136q28 28 28 68t-28 68l-294 294 294 294q28 28 28 68z")]) $ R.blank
+
+delete :: forall t m. MonadWidget t m => m ()
+delete =
+  svgAttr "svg" (M.fromList [ ("width", "18"), ("height", "18"), ("viewBox", "0 0 1792 1792") ]) $
+    svgAttr "path" (M.fromList [("d", "M704 1376v-704q0-14-9-23t-23-9h-64q-14 0-23 9t-9 23v704q0 14 9 23t23 9h64q14 0 23-9t9-23zm256 0v-704q0-14-9-23t-23-9h-64q-14 0-23 9t-9 23v704q0 14 9 23t23 9h64q14 0 23-9t9-23zm256 0v-704q0-14-9-23t-23-9h-64q-14 0-23 9t-9 23v704q0 14 9 23t23 9h64q14 0 23-9t9-23zm-544-992h448l-48-117q-7-9-17-11h-317q-10 2-17 11zm928 32v64q0 14-9 23t-23 9h-96v948q0 83-47 143.5t-113 60.5h-832q-66 0-113-58.5t-47-141.5v-952h-96q-14 0-23-9t-9-23v-64q0-14 9-23t23-9h309l70-167q15-37 54-63t79-26h320q40 0 79 26t54 63l70 167h309q14 0 23 9t9 23z")]) $ R.blank
+
+doubleLeft :: forall t m. MonadWidget t m => m ()
+doubleLeft =
+  svgAttr "svg" (M.fromList [ ("width", "13"), ("height", "13"), ("viewBox", "0 0 1792 1792") ]) $
+    svgAttr "path" (M.fromList [("d", "M1683 141q19-19 32-13t13 32v1472q0 26-13 32t-32-13l-710-710q-8-9-13-19v710q0 26-13 32t-32-13l-710-710q-19-19-19-45t19-45l710-710q19-19 32-13t13 32v710q5-11 13-19z")]) $ R.blank
+
+doubleLeftBar :: forall t m. MonadWidget t m => m ()
+doubleLeftBar =
+  svgAttr "svg" (M.fromList [ ("width", "13"), ("height", "13"), ("viewBox", "0 0 1792 1792") ]) $
+    svgAttr "path" (M.fromList [("d", "M1747 141q19-19 32-13t13 32v1472q0 26-13 32t-32-13l-710-710q-9-9-13-19v710q0 26-13 32t-32-13l-710-710q-9-9-13-19v678q0 26-19 45t-45 19h-128q-26 0-45-19t-19-45v-1408q0-26 19-45t45-19h128q26 0 45 19t19 45v678q4-11 13-19l710-710q19-19 32-13t13 32v710q4-11 13-19z")]) $ R.blank
+
+doubleRight :: forall t m. MonadWidget t m => m ()
+doubleRight =
+  svgAttr "svg" (M.fromList [ ("width", "13"), ("height", "13"), ("viewBox", "0 0 1792 1792") ]) $
+    svgAttr "path" (M.fromList [("d", "M109 1651q-19 19-32 13t-13-32v-1472q0-26 13-32t32 13l710 710q8 8 13 19v-710q0-26 13-32t32 13l710 710q19 19 19 45t-19 45l-710 710q-19 19-32 13t-13-32v-710q-5 10-13 19z")]) $ R.blank
+
+doubleRightBar :: forall t m. MonadWidget t m => m ()
+doubleRightBar =
+  svgAttr "svg" (M.fromList [ ("width", "13"), ("height", "13"), ("viewBox", "0 0 1792 1792") ]) $
+    svgAttr "path" (M.fromList [("d", "M45 1651q-19 19-32 13t-13-32v-1472q0-26 13-32t32 13l710 710q8 8 13 19v-710q0-26 13-32t32 13l710 710q8 8 13 19v-678q0-26 19-45t45-19h128q26 0 45 19t19 45v1408q0 26-19 45t-45 19h-128q-26 0-45-19t-19-45v-678q-5 10-13 19l-710 710q-19 19-32 13t-13-32v-710q-5 10-13 19z")]) $ R.blank
+
+edit :: forall t m. MonadWidget t m => m ()
+edit =
+  svgAttr "svg" (M.fromList [ ("width", "18"), ("height", "18"), ("viewBox", "0 0 1792 1792") ]) $
+    svgAttr "path" (M.fromList [("d", "M491 1536l91-91-235-235-91 91v107h128v128h107zm523-928q0-22-22-22-10 0-17 7l-542 542q-7 7-7 17 0 22 22 22 10 0 17-7l542-542q7-7 7-17zm-54-192l416 416-832 832h-416v-416zm683 96q0 53-37 90l-166 166-416-416 166-165q36-38 90-38 53 0 91 38l235 234q37 39 37 91z")]) $ R.blank
+
+loading :: forall t m. MonadWidget t m => m ()
+loading =
+  svgAttr "svg" (M.fromList [ ("width", "24"), ("height", "24"), ("viewBox", "0 0 24 24"), ("class", "loader"), ("fill", "currentColor") ]) $
+    svgAttr "path" (M.fromList [("d", "M13.75 22c0 .966-.783 1.75-1.75 1.75s-1.75-.784-1.75-1.75.783-1.75 1.75-1.75 1.75.784 1.75 1.75zm-1.75-22c-1.104 0-2 .896-2 2s.896 2 2 2 2-.896 2-2-.896-2-2-2zm10 10.75c.689 0 1.249.561 1.249 1.25 0 .69-.56 1.25-1.249 1.25-.69 0-1.249-.559-1.249-1.25 0-.689.559-1.25 1.249-1.25zm-22 1.25c0 1.105.896 2 2 2s2-.895 2-2c0-1.104-.896-2-2-2s-2 .896-2 2zm19-8c.551 0 1 .449 1 1 0 .553-.449 1.002-1 1-.551 0-1-.447-1-.998 0-.553.449-1.002 1-1.002zm0 13.5c.828 0 1.5.672 1.5 1.5s-.672 1.501-1.502 1.5c-.826 0-1.498-.671-1.498-1.499 0-.829.672-1.501 1.5-1.501zm-14-14.5c1.104 0 2 .896 2 2s-.896 2-2.001 2c-1.103 0-1.999-.895-1.999-2s.896-2 2-2zm0 14c1.104 0 2 .896 2 2s-.896 2-2.001 2c-1.103 0-1.999-.895-1.999-2s.896-2 2-2z")]) $ R.blank
+
+signOut :: forall t m. MonadWidget t m => m ()
+signOut =
+  svgAttr "svg" (M.fromList [ ("width", "30"), ("height", "30"), ("viewBox", "0 0 1792 1792") ]) $
+    svgAttr "path" (M.fromList [("d", "M1664 896q0 156-61 298t-164 245-245 164-298 61-298-61-245-164-164-245-61-298q0-182 80.5-343t226.5-270q43-32 95.5-25t83.5 50q32 42 24.5 94.5t-49.5 84.5q-98 74-151.5 181t-53.5 228q0 104 40.5 198.5t109.5 163.5 163.5 109.5 198.5 40.5 198.5-40.5 163.5-109.5 109.5-163.5 40.5-198.5q0-121-53.5-228t-151.5-181q-42-32-49.5-84.5t24.5-94.5q31-43 84-50t95 25q146 109 226.5 270t80.5 343zm-640-768v640q0 52-38 90t-90 38-90-38-38-90v-640q0-52 38-90t90-38 90 38 38 90z")]) $ R.blank
+
+svgAttr :: forall t m a. MonadWidget t m => Text -> Map Text Text -> m a -> m a
+svgAttr elementTag attrs child = R.elWith elementTag (R.ElConfig (Just "http://www.w3.org/2000/svg") attrs) child
diff --git a/client/src/View/Income/Form.hs b/client/src/View/Income/Form.hs
new file mode 100644
index 0000000..59f6a0d
--- /dev/null
+++ b/client/src/View/Income/Form.hs
@@ -0,0 +1,119 @@
+module View.Income.Form
+  ( view
+  , In(..)
+  , Operation(..)
+  ) where
+
+import           Control.Monad.IO.Class   (liftIO)
+import           Data.Aeson               (Value)
+import qualified Data.Aeson               as Aeson
+import qualified Data.Maybe               as Maybe
+import           Data.Text                (Text)
+import qualified Data.Text                as T
+import qualified Data.Time.Calendar       as Calendar
+import qualified Data.Time.Clock          as Time
+import           Data.Validation          (Validation)
+import qualified Data.Validation          as V
+import           Reflex.Dom               (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom               as R
+
+import           Common.Model             (CreateIncomeForm (..),
+                                           EditIncomeForm (..), Income (..))
+import qualified Common.Msg               as Msg
+import qualified Common.Util.Time         as TimeUtil
+import qualified Common.Validation.Income as IncomeValidation
+import qualified Component.Input          as Input
+import qualified Component.Modal          as Modal
+import qualified Component.ModalForm      as ModalForm
+import qualified Util.Ajax                as Ajax
+
+data In = In
+  { _in_operation :: Operation
+  }
+
+data Operation
+  = New
+  | Clone Income
+  | Edit Income
+
+view :: forall t m a. MonadWidget t m => In -> Modal.Content t m
+view input cancel = do
+
+  rec
+    let reset = R.leftmost
+          [ "" <$ ModalForm._out_cancel modalForm
+          , "" <$ ModalForm._out_validate modalForm
+          , "" <$ cancel
+          ]
+
+    modalForm <- ModalForm.view $ ModalForm.In
+      { ModalForm._in_headerLabel = headerLabel
+      , ModalForm._in_ajax        = ajax "/api/income"
+      , ModalForm._in_form        = form reset (ModalForm._out_confirm modalForm)
+      }
+
+  return (ModalForm._out_hide modalForm, ModalForm._out_validate modalForm)
+
+  where
+
+    form
+      :: Event t String
+      -> Event t ()
+      -> m (Dynamic t (Validation Text Value))
+    form reset confirm = do
+      amount <- Input._out_raw <$> (Input.view
+        (Input.defaultIn
+          { Input._in_label = Msg.get Msg.Income_Amount
+          , Input._in_initialValue = amount
+          , Input._in_validation = IncomeValidation.amount
+          })
+        (amount <$ reset)
+        confirm)
+
+      currentDay <- liftIO $ Time.getCurrentTime >>= TimeUtil.timeToDay
+
+      let initialDate = T.pack . Calendar.showGregorian $ date currentDay
+
+      date <- Input._out_raw <$> (Input.view
+        (Input.defaultIn
+          { Input._in_label = Msg.get Msg.Income_Date
+          , Input._in_initialValue = initialDate
+          , Input._in_inputType = "date"
+          , Input._in_hasResetButton = False
+          , Input._in_validation = IncomeValidation.date
+          })
+        (initialDate <$ reset)
+        confirm)
+
+      return $ do
+        a <- amount
+        d <- date
+        return . V.Success $ mkPayload a d
+
+    op = _in_operation input
+
+    amount =
+      case op of
+        New     -> ""
+        Clone i -> T.pack . show . _income_amount $ i
+        Edit i  -> T.pack . show . _income_amount $ i
+
+    date currentDay =
+      case op of
+        Edit i -> _income_date i
+        _      -> currentDay
+
+    ajax =
+      case op of
+        Edit _ -> Ajax.put
+        _      -> Ajax.post
+
+    headerLabel =
+      case op of
+        Edit _ -> Msg.get Msg.Income_Edit
+        _      -> Msg.get Msg.Income_AddLong
+
+    mkPayload =
+      case op of
+        Edit i -> \a b -> Aeson.toJSON $ EditIncomeForm (_income_id i) a b
+        _      -> \a b -> Aeson.toJSON $ CreateIncomeForm a b
diff --git a/client/src/View/Income/Header.hs b/client/src/View/Income/Header.hs
new file mode 100644
index 0000000..a26e16a
--- /dev/null
+++ b/client/src/View/Income/Header.hs
@@ -0,0 +1,77 @@
+module View.Income.Header
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import           Control.Monad.IO.Class (liftIO)
+import qualified Data.Map               as M
+import qualified Data.Maybe             as Maybe
+import qualified Data.Text              as T
+import qualified Data.Time.Clock        as Clock
+import           Reflex.Dom             (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom             as R
+
+import           Common.Model           (Currency, Income (..),
+                                         IncomeHeader (..), User (..))
+import qualified Common.Model           as CM
+import qualified Common.Msg             as Msg
+import qualified Common.View.Format     as Format
+
+import qualified Component.Button       as Button
+import qualified Component.Modal        as Modal
+import qualified View.Income.Form       as Form
+
+data In t = In
+  { _in_users    :: [User]
+  , _in_header   :: IncomeHeader
+  , _in_currency :: Currency
+  }
+
+data Out t = Out
+  { _out_add :: Event t ()
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m (Out t)
+view input =
+  R.divClass "withMargin" $ do
+
+    currentTime <- liftIO Clock.getCurrentTime
+
+    case _incomeHeader_since $ _in_header input of
+      Nothing ->
+        R.blank
+
+      Just since ->
+        R.el "div" $ do
+
+          R.el "h1" $ do
+            R.text $ Msg.get (Msg.Income_CumulativeSince (Format.longDay since))
+
+          R.el "ul" $
+            flip mapM_ (M.toList . _incomeHeader_byUser $ _in_header input) $ \(userId, amount) ->
+              R.el "li" $
+                R.text $
+                  T.intercalate " "
+                    [ Maybe.fromMaybe "" . fmap _user_name $ CM.findUser userId (_in_users input)
+                    , "−"
+                    , Format.price (_in_currency input) amount
+                    ]
+
+    R.divClass "titleButton" $ do
+      R.el "h1" $
+        R.text $
+          Msg.get Msg.Income_MonthlyNet
+
+      addIncome <- Button._out_clic <$>
+        (Button.view . Button.defaultIn . R.text $
+          Msg.get Msg.Income_AddLong)
+
+      addIncome <- Modal.view $ Modal.In
+        { Modal._in_show    = addIncome
+        , Modal._in_content = Form.view $ Form.In { Form._in_operation = Form.New }
+        }
+
+      return $ Out
+        { _out_add = addIncome
+        }
diff --git a/client/src/View/Income/Income.hs b/client/src/View/Income/Income.hs
new file mode 100644
index 0000000..7be8091
--- /dev/null
+++ b/client/src/View/Income/Income.hs
@@ -0,0 +1,75 @@
+{-# LANGUAGE ExplicitForAll #-}
+
+module View.Income.Income
+  ( view
+  , In(..)
+  ) where
+
+import           Data.Aeson          (FromJSON)
+import qualified Data.Maybe          as Maybe
+import qualified Data.Text           as T
+import           Reflex.Dom          (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom          as R
+
+import           Common.Model        (Currency, Income (..), IncomePage (..),
+                                      User, UserId)
+
+import qualified Component.Pages     as Pages
+import           Loadable            (Loadable (..))
+import qualified Loadable
+import qualified Util.Ajax           as AjaxUtil
+import qualified Util.Reflex         as ReflexUtil
+import qualified Util.Reflex         as ReflexUtil
+import qualified View.Income.Header  as Header
+import qualified View.Income.Reducer as Reducer
+import qualified View.Income.Table   as Table
+
+data In t = In
+  { _in_users       :: [User]
+  , _in_currentUser :: UserId
+  , _in_currency    :: Currency
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m ()
+view input = do
+  rec
+    incomePage <- Reducer.reducer $ Reducer.In
+      { Reducer._in_page         = page
+      , Reducer._in_addIncome    = R.leftmost [headerAddIncome, tableAddIncome]
+      , Reducer._in_editIncome   = editIncome
+      , Reducer._in_deleteIncome = deleteIncome
+      }
+
+    let eventFromResult :: forall a. ((Header.Out t, Table.Out t, Pages.Out t) -> Event t a) -> m (Event t a)
+        eventFromResult op = ReflexUtil.flatten . fmap (Maybe.fromMaybe R.never . fmap op) $ result
+
+    page <- eventFromResult $ Pages._out_newPage . (\(_, _, c) -> c)
+    headerAddIncome <- eventFromResult $ Header._out_add . (\(a, _, _) -> a)
+    tableAddIncome <- eventFromResult $ Table._out_add . (\(_, b, _) -> b)
+    editIncome <- eventFromResult $ Table._out_edit . (\(_, b, _) -> b)
+    deleteIncome <- eventFromResult $ Table._out_delete . (\(_, b, _) -> b)
+
+    result <- Loadable.viewShowValueWhileLoading incomePage $
+      \(IncomePage page header incomes count) -> do
+        header <- Header.view $ Header.In
+          { Header._in_users = _in_users input
+          , Header._in_header = header
+          , Header._in_currency = _in_currency input
+          }
+
+        table <- Table.view $ Table.In
+          { Table._in_currentUser = _in_currentUser input
+          , Table._in_currency = _in_currency input
+          , Table._in_incomes = incomes
+          , Table._in_users = _in_users input
+          }
+
+        pages <- Pages.view $ Pages.In
+          { Pages._in_total = R.constDyn count
+          , Pages._in_perPage = Reducer.perPage
+          , Pages._in_page = page
+          }
+
+        return (header, table, pages)
+
+  return ()
diff --git a/client/src/View/Income/Reducer.hs b/client/src/View/Income/Reducer.hs
new file mode 100644
index 0000000..ea9f664
--- /dev/null
+++ b/client/src/View/Income/Reducer.hs
@@ -0,0 +1,59 @@
+module View.Income.Reducer
+  ( perPage
+  , reducer
+  , In(..)
+  ) where
+
+import           Data.Text    (Text)
+import qualified Data.Text    as T
+import           Reflex.Dom   (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom   as R
+
+import           Common.Model (IncomePage)
+
+import           Loadable     (Loadable (..))
+import qualified Loadable     as Loadable
+import qualified Util.Ajax    as AjaxUtil
+import qualified Util.Either  as EitherUtil
+
+perPage :: Int
+perPage = 7
+
+data In t a b c = In
+  { _in_page         :: Event t Int
+  , _in_addIncome    :: Event t a
+  , _in_editIncome   :: Event t b
+  , _in_deleteIncome :: Event t c
+  }
+
+reducer :: forall t m a b c. MonadWidget t m => In t a b c -> m (Dynamic t (Loadable IncomePage))
+reducer input = do
+
+  postBuild <- R.getPostBuild
+
+  currentPage <- R.holdDyn 1 (_in_page input)
+
+  let loadPage =
+        R.leftmost
+          [ 1 <$ postBuild
+          , _in_page input
+          , 1 <$ _in_addIncome input
+          , R.tag (R.current currentPage) (_in_editIncome input)
+          , R.tag (R.current currentPage) (_in_deleteIncome input)
+          ]
+
+  getResult <- AjaxUtil.get $ fmap pageUrl loadPage
+
+  R.holdDyn
+    Loading
+    (R.leftmost
+      [ Loading <$ loadPage
+      , Loadable.fromEither <$> getResult
+      ])
+
+  where
+    pageUrl p =
+      "api/incomes?page="
+      <> (T.pack . show $ p)
+      <> "&perPage="
+      <> (T.pack . show $ perPage)
diff --git a/client/src/View/Income/Table.hs b/client/src/View/Income/Table.hs
new file mode 100644
index 0000000..7b7940d
--- /dev/null
+++ b/client/src/View/Income/Table.hs
@@ -0,0 +1,93 @@
+module View.Income.Table
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import qualified Data.Maybe              as Maybe
+import           Data.Text               (Text)
+import qualified Data.Text               as T
+import           Reflex.Dom              (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom              as R
+
+import           Common.Model            (Currency, Income (..), User (..),
+                                          UserId)
+import qualified Common.Model            as CM
+import qualified Common.Msg              as Msg
+import qualified Common.View.Format      as Format
+
+import qualified Component.ConfirmDialog as ConfirmDialog
+import qualified Component.Table         as Table
+import qualified Util.Ajax               as Ajax
+import qualified Util.Either             as EitherUtil
+import qualified View.Income.Form        as Form
+
+data In t = In
+  { _in_currentUser :: UserId
+  , _in_currency    :: Currency
+  , _in_incomes     :: [Income]
+  , _in_users       :: [User]
+  }
+
+data Out t = Out
+  { _out_add    :: Event t ()
+  , _out_edit   :: Event t ()
+  , _out_delete :: Event t ()
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m (Out t)
+view input = do
+
+  table <- Table.view $ Table.In
+    { Table._in_headerLabel = headerLabel
+    , Table._in_rows = _in_incomes input
+    , Table._in_cell = cell (_in_users input) (_in_currency input)
+    , Table._in_cloneModal = \income ->
+      Form.view $ Form.In
+        { Form._in_operation = Form.Clone income
+        }
+    , Table._in_editModal = \income ->
+      Form.view $ Form.In
+        { Form._in_operation = Form.Edit income
+        }
+    , Table._in_deleteModal = \income ->
+      ConfirmDialog.view $ ConfirmDialog.In
+        { ConfirmDialog._in_header  = Msg.get Msg.Income_DeleteConfirm
+        , ConfirmDialog._in_confirm = \e -> do
+          res <- Ajax.delete
+            (R.constDyn $ T.concat ["/api/income/", T.pack . show $ _income_id income])
+            e
+          return $ () <$ R.fmapMaybe EitherUtil.eitherToMaybe res
+        }
+    , Table._in_canEdit = (== (_in_currentUser input)) . _income_userId
+    , Table._in_canDelete = (== (_in_currentUser input)) . _income_userId
+    }
+
+  return $ Out
+    { _out_add = Table._out_add table
+    , _out_edit = Table._out_edit table
+    , _out_delete = Table._out_delete table
+    }
+
+data Header
+  = UserHeader
+  | AmountHeader
+  | DateHeader
+  deriving (Eq, Show, Bounded, Enum)
+
+headerLabel :: Header -> Text
+headerLabel UserHeader   = Msg.get Msg.Income_Name
+headerLabel DateHeader   = Msg.get Msg.Income_Date
+headerLabel AmountHeader = Msg.get Msg.Income_Amount
+
+cell :: forall t m. MonadWidget t m => [User] -> Currency -> Header -> Income -> m ()
+cell users currency header income =
+  case header of
+    UserHeader ->
+      R.text . Maybe.fromMaybe "" . fmap _user_name $ CM.findUser (_income_userId income) users
+
+    DateHeader ->
+      R.text . Format.longDay . _income_date $ income
+
+    AmountHeader ->
+      R.text . Format.price currency . _income_amount $ income
diff --git a/client/src/View/NotFound.hs b/client/src/View/NotFound.hs
new file mode 100644
index 0000000..1597849
--- /dev/null
+++ b/client/src/View/NotFound.hs
@@ -0,0 +1,20 @@
+module View.NotFound
+  ( view
+  ) where
+
+import qualified Data.Map       as M
+import           Reflex.Dom     (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom     as R
+
+import qualified Common.Msg     as Msg
+import qualified Component.Link as Link
+
+view :: forall t m. MonadWidget t m => m ()
+view =
+  R.divClass "notfound" $ do
+    R.text (Msg.get Msg.NotFound_Message)
+
+    Link.view
+      "/"
+      (R.constDyn $ M.singleton "class" "link")
+      (Msg.get Msg.NotFound_LinkMessage)
diff --git a/client/src/View/Payment/Form.hs b/client/src/View/Payment/Form.hs
new file mode 100644
index 0000000..6c31fad
--- /dev/null
+++ b/client/src/View/Payment/Form.hs
@@ -0,0 +1,199 @@
+module View.Payment.Form
+  ( view
+  , In(..)
+  , Operation(..)
+  ) where
+
+import           Control.Monad             (join)
+import           Control.Monad.IO.Class    (liftIO)
+import           Data.Aeson                (Value)
+import qualified Data.Aeson                as Aeson
+import qualified Data.List                 as L
+import           Data.List.NonEmpty        (NonEmpty)
+import qualified Data.Map                  as M
+import qualified Data.Maybe                as Maybe
+import           Data.Text                 (Text)
+import qualified Data.Text                 as T
+import           Data.Time                 (NominalDiffTime)
+import           Data.Time.Calendar        (Day)
+import qualified Data.Time.Calendar        as Calendar
+import qualified Data.Time.Clock           as Clock
+import           Data.Validation           (Validation)
+import qualified Data.Validation           as V
+import           Reflex.Dom                (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom                as R
+import qualified Text.Read                 as T
+
+import           Common.Model              (Category (..), CategoryId,
+                                            CreatePaymentForm (..),
+                                            EditPaymentForm (..),
+                                            Frequency (..), Payment (..))
+import qualified Common.Msg                as Msg
+import qualified Common.Util.Time          as TimeUtil
+import qualified Common.Validation.Payment as PaymentValidation
+
+import qualified Component.Input           as Input
+import qualified Component.Modal           as Modal
+import qualified Component.ModalForm       as ModalForm
+import qualified Component.Select          as Select
+import qualified Util.Ajax                 as Ajax
+import qualified Util.Either               as EitherUtil
+import qualified Util.Validation           as ValidationUtil
+
+data In t = In
+  { _in_categories :: [Category]
+  , _in_operation  :: Operation t
+  , _in_frequency  :: Frequency
+  }
+
+data Operation t
+  = New
+  | Clone Payment
+  | Edit Payment
+
+view :: forall t m a. MonadWidget t m => In t -> Modal.Content t m
+view input cancel = do
+  rec
+    let reset = R.leftmost
+          [ "" <$ ModalForm._out_cancel modalForm
+          , "" <$ ModalForm._out_validate modalForm
+          , "" <$ cancel
+          ]
+
+    modalForm <- ModalForm.view $ ModalForm.In
+      { ModalForm._in_headerLabel = headerLabel
+      , ModalForm._in_ajax        = ajax "/api/payment"
+      , ModalForm._in_form        = form reset (ModalForm._out_confirm modalForm)
+      }
+
+  return (ModalForm._out_hide modalForm, ModalForm._out_validate modalForm)
+
+  where
+
+    form
+      :: Event t String
+      -> Event t ()
+      -> m (Dynamic t (Validation (NonEmpty Text) Value))
+    form reset confirm = do
+      name <- Input.view
+        (Input.defaultIn
+          { Input._in_label = Msg.get Msg.Payment_Name
+          , Input._in_initialValue = name
+          , Input._in_validation = PaymentValidation.name
+          })
+        (name <$ reset)
+        confirm
+
+      cost <- Input._out_raw <$> (Input.view
+        (Input.defaultIn
+          { Input._in_label = Msg.get Msg.Payment_Cost
+          , Input._in_initialValue = cost
+          , Input._in_validation = PaymentValidation.cost
+          })
+        (cost <$ reset)
+        confirm)
+
+      currentDate <- date
+
+      date <-
+        case frequency of
+          Punctual -> do
+            Input._out_raw <$> (Input.view
+              (Input.defaultIn
+                { Input._in_label = Msg.get Msg.Payment_Date
+                , Input._in_initialValue = currentDate
+                , Input._in_inputType = "date"
+                , Input._in_hasResetButton = False
+                , Input._in_validation = PaymentValidation.date
+                })
+              (currentDate <$ reset)
+              confirm)
+          Monthly ->
+            return . R.constDyn $ currentDate
+
+      setCategory <-
+        R.debounce  (1 :: NominalDiffTime) (R.updated $ Input._out_raw name)
+          >>= (return . R.ffilter (\name -> T.length name >= 3))
+          >>= (Ajax.get . (fmap ("/api/payment/category?name=" <>)))
+          >>= (return . R.mapMaybe (join . EitherUtil.eitherToMaybe))
+
+      category <- Select._out_value <$> (Select.view $ Select.In
+        { Select._in_label = Msg.get Msg.Payment_Category
+        , Select._in_initialValue = category
+        , Select._in_value = setCategory
+        , Select._in_values = R.constDyn categories
+        , Select._in_reset = category <$ reset
+        , Select._in_isValid = PaymentValidation.category (map _category_id $ _in_categories input)
+        , Select._in_validate = confirm
+        })
+
+      return $ do
+        n <- Input._out_value name
+        c <- cost
+        d <- date
+        cat <- category
+        return (mkPayload
+          <$> ValidationUtil.nelError n
+          <*> V.Success c
+          <*> V.Success d
+          <*> ValidationUtil.nelError cat
+          <*> V.Success frequency)
+
+    frequencies =
+      M.fromList
+        [ (Punctual, Msg.get Msg.Payment_PunctualMale)
+        , (Monthly, Msg.get Msg.Payment_MonthlyMale)
+        ]
+
+    categories = M.fromList . flip map (_in_categories input) $ \c ->
+      (_category_id c, _category_name c)
+
+    category =
+      case op of
+        New     -> -1
+        Clone p -> _payment_category p
+        Edit p  -> _payment_category p
+
+    op = _in_operation input
+
+    name =
+      case op of
+        New     -> ""
+        Clone p -> _payment_name p
+        Edit p  -> _payment_name p
+
+    cost =
+      case op of
+        New     -> ""
+        Clone p -> T.pack . show . _payment_cost $ p
+        Edit p  -> T.pack . show . _payment_cost $ p
+
+    date = do
+      currentDay <- liftIO $ Clock.getCurrentTime >>= TimeUtil.timeToDay
+      return . T.pack . Calendar.showGregorian $
+        case op of
+          New     -> currentDay
+          Clone p -> currentDay
+          Edit p  -> _payment_date p
+
+    frequency =
+      case op of
+        New     -> _in_frequency input
+        Clone p -> _payment_frequency p
+        Edit p  -> _payment_frequency p
+
+    headerLabel =
+      case op of
+        New     -> Msg.get Msg.Payment_Add
+        Clone _ -> Msg.get Msg.Payment_CloneLong
+        Edit _  -> Msg.get Msg.Payment_EditLong
+
+    ajax =
+      case op of
+        Edit _ -> Ajax.put
+        _      -> Ajax.post
+
+    mkPayload =
+      case op of
+        Edit p -> \a b c d e -> Aeson.toJSON $ EditPaymentForm (_payment_id p) a b c d e
+        _      -> \a b c d e -> Aeson.toJSON $ CreatePaymentForm a b c d e
diff --git a/client/src/View/Payment/HeaderForm.hs b/client/src/View/Payment/HeaderForm.hs
new file mode 100644
index 0000000..1915841
--- /dev/null
+++ b/client/src/View/Payment/HeaderForm.hs
@@ -0,0 +1,85 @@
+module View.Payment.HeaderForm
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import qualified Data.Map          as M
+import           Data.Text         (Text)
+import qualified Data.Validation   as V
+import           Reflex.Dom        (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom        as R
+
+import           Common.Model      (Category, Currency, Frequency (..),
+                                    Income (..), Payment (..), User (..))
+import qualified Common.Msg        as Msg
+
+import qualified Component.Button  as Button
+import qualified Component.Input   as Input
+import qualified Component.Modal   as Modal
+import qualified Component.Select  as Select
+import qualified Util.Reflex       as ReflexUtil
+import qualified View.Payment.Form as Form
+
+data In t = In
+  { _in_reset      :: Event t ()
+  , _in_categories :: [Category]
+  }
+
+data Out t = Out
+  { _out_search     :: Event t Text
+  , _out_frequency  :: Event t Frequency
+  , _out_addPayment :: Event t ()
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m (Out t)
+view input =
+  R.divClass "g-PaymentHeaderForm" $ do
+
+    (searchName, frequency) <- R.el "div" $ do
+
+      searchName <- Input._out_raw <$> (Input.view
+        ( Input.defaultIn { Input._in_label = Msg.get Msg.Search_Name })
+        ("" <$ _in_reset input)
+        R.never)
+
+      let frequencies = M.fromList
+            [ (Punctual, Msg.get Msg.Payment_PunctualMale)
+            , (Monthly, Msg.get Msg.Payment_MonthlyMale)
+            ]
+
+      frequency <- Select._out_raw <$> (Select.view $ Select.In
+          { Select._in_label        = ""
+          , Select._in_initialValue = Punctual
+          , Select._in_value        = R.never
+          , Select._in_values       = R.constDyn frequencies
+          , Select._in_reset        = R.never
+          , Select._in_isValid      = V.Success
+          , Select._in_validate     = R.never
+          })
+
+      return (searchName, frequency)
+
+    addPaymentButton <- Button._out_clic <$>
+      (Button.view $
+        (Button.defaultIn (R.text $ Msg.get Msg.Payment_Add))
+          { Button._in_class = R.constDyn "addPayment"
+          })
+
+    addPayment <-
+      (R.dyn . R.ffor frequency $ \frequency ->
+        Modal.view $ Modal.In
+          { Modal._in_show    = addPaymentButton
+          , Modal._in_content =
+            Form.view $ Form.In
+              { Form._in_categories = _in_categories input
+              , Form._in_operation = Form.New
+              , Form._in_frequency = frequency
+              }
+          }) >>= ReflexUtil.flatten
+
+    return $ Out
+      { _out_search = R.updated searchName
+      , _out_frequency = R.updated frequency
+      , _out_addPayment = addPayment
+      }
diff --git a/client/src/View/Payment/HeaderInfos.hs b/client/src/View/Payment/HeaderInfos.hs
new file mode 100644
index 0000000..f84ee1f
--- /dev/null
+++ b/client/src/View/Payment/HeaderInfos.hs
@@ -0,0 +1,94 @@
+module View.Payment.HeaderInfos
+  ( view
+  , In(..)
+  ) where
+
+import           Control.Monad.IO.Class (liftIO)
+import qualified Data.List              as L hiding (groupBy)
+import           Data.Map               (Map)
+import qualified Data.Map               as M
+import           Data.Maybe             (fromMaybe)
+import           Data.Text              (Text)
+import qualified Data.Text              as T
+import qualified Data.Time              as Time
+import           Reflex.Dom             (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom             as R
+
+import           Common.Model           (Currency, ExceedingPayer (..),
+                                         Payment (..), PaymentHeader (..),
+                                         User (..), UserId)
+import qualified Common.Model           as CM
+import qualified Common.Msg             as Msg
+import qualified Common.View.Format     as Format
+
+data In t = In
+  { _in_users        :: [User]
+  , _in_currency     :: Currency
+  , _in_header       :: PaymentHeader
+  , _in_paymentCount :: Int
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m ()
+view input =
+  R.divClass "g-PaymentHeaderInfos" $ do
+    exceedingPayers
+      (_in_users input)
+      (_in_currency input)
+      (_paymentHeader_exceedingPayers header)
+
+    infos
+      (_in_users input)
+      (_in_currency input)
+      (_paymentHeader_repartition header)
+      (_in_paymentCount input)
+
+  where
+    header = _in_header input
+
+exceedingPayers
+  :: forall t m. MonadWidget t m
+  => [User]
+  -> Currency
+  -> [ExceedingPayer]
+  -> m ()
+exceedingPayers users currency payers =
+  R.divClass "g-PaymentHeaderInfos__ExceedingPayers" $
+    flip mapM_ payers $ \payer ->
+      R.elClass "span" "exceedingPayer" $ do
+        R.elClass "span" "userName" $
+          R.text $
+            fromMaybe "" . fmap _user_name $ CM.findUser (_exceedingPayer_userId payer) users
+        R.elClass "span" "amount" $ do
+          R.text "+ "
+          R.text . Format.price currency $ _exceedingPayer_amount payer
+
+infos
+  :: forall t m. MonadWidget t m
+  => [User]
+  -> Currency
+  -> Map UserId Int
+  -> Int
+  -> m ()
+infos users currency repartition paymentCount =
+  R.divClass "g-PaymentHeaderInfos__Repartition" $ do
+
+    R.elClass "span" "total" $ do
+      R.text $
+        Msg.get $ Msg.Payment_Worth
+          (T.intercalate " "
+            [ (Format.number paymentCount)
+            , if paymentCount > 1
+                then Msg.get Msg.Payment_Many
+                else Msg.get Msg.Payment_One
+            ])
+          (Format.price currency (M.foldl (+) 0 repartition))
+
+    R.elClass "span" "partition" . R.text $
+      let totalByUser =
+            L.sortBy (\(_, t1) (_, t2) -> compare t2 t1)
+              . M.toList
+              $ repartition
+      in  T.intercalate ", " . flip map totalByUser $ \(userId, userTotal) ->
+            Msg.get $ Msg.Payment_By
+              (fromMaybe "" . fmap _user_name $ CM.findUser userId users)
+              (Format.price currency userTotal)
diff --git a/client/src/View/Payment/Payment.hs b/client/src/View/Payment/Payment.hs
new file mode 100644
index 0000000..26444d7
--- /dev/null
+++ b/client/src/View/Payment/Payment.hs
@@ -0,0 +1,101 @@
+module View.Payment.Payment
+  ( view
+  , In(..)
+  ) where
+
+import           Control.Monad.IO.Class   (liftIO)
+import qualified Data.Maybe               as Maybe
+import           Data.Text                (Text)
+import qualified Data.Text                as T
+import           Data.Time.Clock          (NominalDiffTime)
+import           Prelude                  hiding (init)
+import           Reflex.Dom               (Dynamic, Event, MonadWidget, Reflex)
+import qualified Reflex.Dom               as R
+
+import           Common.Model             (Currency, Frequency, Income (..),
+                                           Payment (..), PaymentId,
+                                           PaymentPage (..), User, UserId)
+import qualified Common.Util.Text         as T
+
+import qualified Component.Pages          as Pages
+import           Loadable                 (Loadable (..))
+import qualified Loadable
+import qualified Util.Ajax                as AjaxUtil
+import qualified Util.Reflex              as ReflexUtil
+import qualified View.Payment.HeaderForm  as HeaderForm
+import qualified View.Payment.HeaderInfos as HeaderInfos
+import qualified View.Payment.Reducer     as Reducer
+import qualified View.Payment.Table       as Table
+
+data In t = In
+  { _in_currentUser :: UserId
+  , _in_users       :: [User]
+  , _in_currency    :: Currency
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m ()
+view input = do
+
+  categories <- AjaxUtil.getNow "api/allCategories"
+
+  R.dyn . R.ffor categories . Loadable.viewHideValueWhileLoading $ \categories -> do
+
+    rec
+      paymentPage <- Reducer.reducer $ Reducer.In
+        { Reducer._in_page          = page
+        , Reducer._in_search        = HeaderForm._out_search form
+        , Reducer._in_frequency     = HeaderForm._out_frequency form
+        , Reducer._in_addPayment    = addPayment
+        , Reducer._in_editPayment   = editPayment
+        , Reducer._in_deletePayment = deletePayment
+        }
+
+      let eventFromResult :: forall a. ((Table.Out t, Pages.Out t) -> Event t a) -> m (Event t a)
+          eventFromResult op = ReflexUtil.flatten . fmap (Maybe.fromMaybe R.never . fmap op) $ result
+
+      let addPayment =
+            R.leftmost
+              [ tableAddPayment
+              , HeaderForm._out_addPayment form
+              ]
+
+      page <- eventFromResult $ Pages._out_newPage . snd
+      tableAddPayment <- eventFromResult $ Table._out_add . fst
+      editPayment <- eventFromResult $ Table._out_edit . fst
+      deletePayment <- eventFromResult $ Table._out_delete . fst
+
+      form <- HeaderForm.view $ HeaderForm.In
+        { HeaderForm._in_reset             = () <$ addPayment
+        , HeaderForm._in_categories        = categories
+        }
+
+      result <- Loadable.viewShowValueWhileLoading paymentPage $
+        \(PaymentPage page frequency header payments count) -> do
+
+          HeaderInfos.view $ HeaderInfos.In
+            { HeaderInfos._in_users = _in_users input
+            , HeaderInfos._in_currency = _in_currency input
+            , HeaderInfos._in_header = header
+            , HeaderInfos._in_paymentCount = count
+            }
+
+          table <- Table.view $ Table.In
+            { Table._in_users = _in_users input
+            , Table._in_currentUser = _in_currentUser input
+            , Table._in_categories = categories
+            , Table._in_currency = _in_currency input
+            , Table._in_payments = payments
+            , Table._in_frequency = frequency
+            }
+
+          pages <- Pages.view $ Pages.In
+            { Pages._in_total = R.constDyn count
+            , Pages._in_perPage = Reducer.perPage
+            , Pages._in_page = page
+            }
+
+          return (table, pages)
+
+    return ()
+
+  return ()
diff --git a/client/src/View/Payment/Reducer.hs b/client/src/View/Payment/Reducer.hs
new file mode 100644
index 0000000..3fe59b2
--- /dev/null
+++ b/client/src/View/Payment/Reducer.hs
@@ -0,0 +1,110 @@
+module View.Payment.Reducer
+  ( perPage
+  , reducer
+  , In(..)
+  , Params(..)
+  ) where
+
+import           Data.Text    (Text)
+import qualified Data.Text    as T
+import           Data.Time    (NominalDiffTime)
+import           Reflex.Dom   (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom   as R
+
+import           Common.Model (Frequency (..), PaymentPage)
+
+import           Loadable     (Loadable (..))
+import qualified Loadable     as Loadable
+import qualified Util.Ajax    as AjaxUtil
+import qualified Util.Either  as EitherUtil
+
+perPage :: Int
+perPage = 7
+
+data In t a b c = In
+  { _in_page          :: Event t Int
+  , _in_search        :: Event t Text
+  , _in_frequency     :: Event t Frequency
+  , _in_addPayment    :: Event t a
+  , _in_editPayment   :: Event t b
+  , _in_deletePayment :: Event t c
+  }
+
+data Params = Params
+  { _params_page      :: Int
+  , _params_search    :: Text
+  , _params_frequency :: Frequency
+  } deriving (Show)
+
+initParams = Params 1 "" Punctual
+
+data Msg
+  = Page Int
+  | Search Text
+  | Frequency Common.Model.Frequency
+  | ResetSearch
+  deriving Show
+
+reducer :: forall t m a b c. MonadWidget t m => In t a b c -> m (Dynamic t (Loadable PaymentPage))
+reducer input = do
+
+  postBuild <- R.getPostBuild
+
+  debouncedSearch <- R.debounce (1 :: NominalDiffTime) (_in_search input)
+
+  params <- R.foldDynMaybe
+    (\msg params -> case msg of
+      Page page     ->
+        Just $ params { _params_page = page }
+
+      Search ""     ->
+        if _params_search params == "" then
+          Nothing
+
+        else
+          Just $ initParams { _params_frequency = _params_frequency params }
+
+      Search search ->
+        Just $ params { _params_search = search, _params_page = _params_page initParams }
+
+      Frequency frequency ->
+        Just $ params { _params_frequency = frequency, _params_page = _params_page initParams }
+
+      ResetSearch   ->
+        Just $ initParams { _params_frequency = _params_frequency params }
+    )
+    initParams
+    (R.leftmost
+      [ Page <$> _in_page input
+      , Search <$> debouncedSearch
+      , Frequency <$> _in_frequency input
+      , ResetSearch <$ _in_addPayment input
+      ])
+
+  let paramsEvent =
+        R.leftmost
+          [ initParams <$ postBuild
+          , R.updated params
+          , R.tag (R.current params) (_in_editPayment input)
+          , R.tag (R.current params) (_in_deletePayment input)
+          ]
+
+  getResult <- AjaxUtil.get (pageUrl <$> paramsEvent)
+
+  R.holdDyn
+    Loading
+    (R.leftmost
+      [ Loading <$ paramsEvent
+      , Loadable.fromEither <$> getResult
+      ])
+
+  where
+    pageUrl (Params page search frequency) =
+      "api/payments?page="
+      <> (T.pack . show $ page)
+      <> "&perPage="
+      <> (T.pack . show $ perPage)
+      <> "&search="
+      <> search
+      <> "&frequency="
+      <> (T.pack $ show frequency)
diff --git a/client/src/View/Payment/Table.hs b/client/src/View/Payment/Table.hs
new file mode 100644
index 0000000..bfa0fb9
--- /dev/null
+++ b/client/src/View/Payment/Table.hs
@@ -0,0 +1,143 @@
+module View.Payment.Table
+  ( view
+  , In(..)
+  , Out(..)
+  ) where
+
+import qualified Data.List               as L
+import qualified Data.Map                as M
+import qualified Data.Maybe              as Maybe
+import           Data.Text               (Text)
+import qualified Data.Text               as T
+import           Reflex.Dom              (Dynamic, Event, MonadWidget)
+import qualified Reflex.Dom              as R
+
+import           Common.Model            (Category (..), Currency,
+                                          Frequency (..), Payment (..),
+                                          User (..), UserId)
+import qualified Common.Model            as CM
+import qualified Common.Msg              as Msg
+import qualified Common.View.Format      as Format
+
+import qualified Component.ConfirmDialog as ConfirmDialog
+import qualified Component.Table         as Table
+import qualified Component.Tag           as Tag
+import qualified Util.Ajax               as Ajax
+import qualified Util.Either             as EitherUtil
+import qualified View.Payment.Form       as Form
+
+data In t = In
+  { _in_users       :: [User]
+  , _in_currentUser :: UserId
+  , _in_categories  :: [Category]
+  , _in_currency    :: Currency
+  , _in_payments    :: [Payment]
+  , _in_frequency   :: Frequency
+  }
+
+data Out t = Out
+  { _out_add    :: Event t ()
+  , _out_edit   :: Event t ()
+  , _out_delete :: Event t ()
+  }
+
+view :: forall t m. MonadWidget t m => In t -> m (Out t)
+view input = do
+
+  table <- Table.view $ Table.In
+    { Table._in_headerLabel = headerLabel (_in_frequency input)
+    , Table._in_rows = _in_payments input
+    , Table._in_cell =
+      cell
+        (_in_users input)
+        (_in_categories input)
+        (_in_frequency input)
+        (_in_currency input)
+    , Table._in_cloneModal = \payment ->
+      Form.view $ Form.In
+        { Form._in_categories = _in_categories input
+        , Form._in_operation = Form.Clone payment
+        , Form._in_frequency = _in_frequency input
+        }
+    , Table._in_editModal = \payment ->
+      Form.view $ Form.In
+        { Form._in_categories = _in_categories input
+        , Form._in_operation = Form.Edit payment
+        , Form._in_frequency = _in_frequency input
+        }
+    , Table._in_deleteModal = \payment ->
+      ConfirmDialog.view $ ConfirmDialog.In
+        { ConfirmDialog._in_header  = Msg.get Msg.Payment_DeleteConfirm
+        , ConfirmDialog._in_confirm = \e -> do
+          res <- Ajax.delete
+            (R.constDyn $ T.concat ["/api/payment/", T.pack . show $ _payment_id payment])
+            e
+          return $ () <$ R.fmapMaybe EitherUtil.eitherToMaybe res
+        }
+    , Table._in_canEdit = (== (_in_currentUser input)) . _payment_user
+    , Table._in_canDelete = (== (_in_currentUser input)) . _payment_user
+    }
+
+  return $ Out
+    { _out_add = Table._out_add table
+    , _out_edit = Table._out_edit table
+    , _out_delete = Table._out_delete table
+    }
+
+data Header
+  = NameHeader
+  | CostHeader
+  | UserHeader
+  | CategoryHeader
+  | DateHeader
+  deriving (Eq, Show, Bounded, Enum)
+
+headerLabel :: Frequency -> Header -> Text
+headerLabel _ NameHeader        = Msg.get Msg.Payment_Name
+headerLabel _ CostHeader        = Msg.get Msg.Payment_Cost
+headerLabel _ UserHeader        = Msg.get Msg.Payment_User
+headerLabel _ CategoryHeader    = Msg.get Msg.Payment_Category
+headerLabel Punctual DateHeader = Msg.get Msg.Payment_Date
+headerLabel Monthly DateHeader  = ""
+
+cell
+  :: forall t m. MonadWidget t m
+  => [User]
+  -> [Category]
+  -> Frequency
+  -> Currency
+  -> Header
+  -> Payment
+  -> m ()
+cell users categories frequency currency header payment =
+  case header of
+    NameHeader ->
+      R.text $ _payment_name payment
+
+    CostHeader ->
+      R.text . Format.price currency . _payment_cost $ payment
+
+    UserHeader ->
+      R.text . Maybe.fromMaybe "" . fmap _user_name $ CM.findUser (_payment_user payment) users
+
+    CategoryHeader ->
+      let
+        category =
+          L.find ((== (_payment_category payment)) . _category_id) categories
+      in
+        Maybe.fromMaybe R.blank . flip fmap category $ \c ->
+          Tag.view $ Tag.In
+            { Tag._in_text = _category_name c
+            , Tag._in_color = _category_color c
+            }
+
+    DateHeader ->
+      if frequency == Punctual then
+        do
+          R.elClass "span" "shortDate" $
+            R.text . Format.shortDay . _payment_date $ payment
+
+          R.elClass "span" "longDate" $
+            R.text . Format.longDay . _payment_date $ payment
+      else
+        R.blank
diff --git a/client/src/View/SignIn.hs b/client/src/View/SignIn.hs
new file mode 100644
index 0000000..e68755f
--- /dev/null
+++ b/client/src/View/SignIn.hs
@@ -0,0 +1,82 @@
+module View.SignIn
+  ( view
+  , Out(..)
+  ) where
+
+import qualified Data.Either              as Either
+import qualified Data.Maybe               as Maybe
+import           Data.Text                (Text)
+import qualified Data.Validation          as V
+import           Reflex.Dom               (Event, MonadWidget)
+import qualified Reflex.Dom               as R
+
+import           Common.Model             (Init, SignInForm (SignInForm))
+import qualified Common.Msg               as Msg
+import qualified Common.Validation.SignIn as SignInValidation
+
+import qualified Component.Button         as Button
+import qualified Component.Form           as Form
+import qualified Component.Input          as Input
+import qualified Util.Ajax                as Ajax
+import qualified Util.Validation          as ValidationUtil
+import qualified Util.WaitFor             as WaitFor
+
+data Out t = Out
+  { _out_success       :: Event t Init
+  }
+
+view :: forall t m. MonadWidget t m => m (Out t)
+view = do
+  signInResult <- R.divClass "signIn" $
+    Form.view $ do
+      rec
+        let resetForm = ("" <$ R.ffilter Either.isRight signInResult)
+
+        email <- Input._out_raw <$> (Input.view
+          (Input.defaultIn
+            { Input._in_label = Msg.get Msg.SignIn_EmailLabel
+            , Input._in_validation = SignInValidation.email
+            })
+          resetForm
+          validate)
+
+        password <- Input._out_raw <$> (Input.view
+          (Input.defaultIn
+            { Input._in_label = Msg.get Msg.SignIn_PasswordLabel
+            , Input._in_validation = SignInValidation.password
+            , Input._in_inputType = "password"
+            })
+          resetForm
+          validate)
+
+        validate <- Button._out_clic <$> (Button.view $
+          (Button.defaultIn (R.text $ Msg.get Msg.SignIn_Button))
+            { Button._in_class = R.constDyn "validate"
+            , Button._in_waiting = waiting
+            , Button._in_submit = True
+            })
+
+        let form = do
+              e <- email
+              p <- password
+              return . V.Success $ SignInForm e p
+
+        (signInResult, waiting) <- WaitFor.waitFor
+          (Ajax.postAndParseResult "/api/signIn")
+          (ValidationUtil.fireValidation form validate)
+
+      showSignInResult signInResult
+
+      return signInResult
+
+  return $ Out
+    { _out_success = R.filterRight signInResult
+    }
+
+showSignInResult :: forall t m. MonadWidget t m => Event t (Either Text Init) -> m ()
+showSignInResult signInResult = do
+  _ <- R.widgetHold R.blank $ showResult <$> signInResult
+  R.blank
+
+  where showResult (Left error) = R.divClass "error" . R.text $ error
+        showResult (Right _)    = R.blank
diff --git a/client/src/View/Statistics/Chart.hs b/client/src/View/Statistics/Chart.hs
new file mode 100644
index 0000000..63df2a1
--- /dev/null
+++ b/client/src/View/Statistics/Chart.hs
@@ -0,0 +1,102 @@
+{-# LANGUAGE CPP           #-}
+{-# LANGUAGE JavaScriptFFI #-}
+
+module View.Statistics.Chart
+  ( view
+  , In(..)
+  , Dataset(..)
+  ) where
+
+import qualified Control.Concurrent                as Concurrent
+import           Control.Monad                     (void)
+import           Control.Monad.IO.Class            (liftIO)
+import           Data.Aeson                        ((.=))
+import qualified Data.Aeson                        as AE
+import qualified Data.Map                          as M
+import           Data.Text                         (Text)
+import           Language.Javascript.JSaddle       (JSString, JSVal)
+import qualified Language.Javascript.JSaddle.Value as JSValue
+import           Reflex.Dom                        (MonadWidget)
+import qualified Reflex.Dom                        as R
+-- import GHCJS.Foreign.Callback
+
+
+#ifdef __GHCJS__
+foreign import javascript unsafe "new Chart(document.getElementById($1), $2);" drawChart :: JSString -> JSVal -> IO ()
+#else
+drawChart = error "drawChart: only available from JavaScript"
+#endif
+
+data In = In
+  { _in_title    :: Text
+  , _in_labels   :: [Text]
+  , _in_datasets :: [Dataset]
+  }
+
+data Dataset = Dataset
+  { _dataset_label :: Text
+  , _dataset_data  :: [Int]
+  , _dataset_color :: Text
+  }
+
+view :: forall t m. MonadWidget t m => In -> m ()
+view input = do
+  R.divClass "g-Chart" $
+    R.elAttr "canvas" (M.singleton "id" "chart") $
+      R.blank
+
+  liftIO $ Concurrent.forkIO $ do
+    Concurrent.threadDelay 500000
+    config <- JSValue.valMakeJSON (configToJson input)
+    drawChart "chart" config
+
+  return ()
+
+configToJson (In title labels datasets) =
+  AE.object
+    [ "type" .= AE.String "line"
+    , "data" .=
+      AE.object
+        [ "labels" .= labels
+        , "datasets" .= map datasetToJson datasets
+        ]
+    , "options" .=
+      AE.object
+        [ "responsive" .= True
+        , "title" .=
+          AE.object
+            [ "display" .= True
+            , "text" .= title
+            ]
+        , "tooltips" .=
+          AE.object
+            [ "mode" .= AE.String "nearest"
+            , "intersect" .= False
+            ]
+        , "hover" .=
+          AE.object
+            [ "mode" .= AE.String "nearest"
+            , "intersect" .= True
+            ]
+        , "scales" .=
+          AE.object
+            [ "yAxes" .=
+              [ [ AE.object
+                  [ "ticks" .=
+                    AE.object
+                      [ "beginAtZero" .= True ]
+                  ]
+                ]
+              ]
+            ]
+        ]
+      ]
+
+datasetToJson (Dataset label data_ color) =
+  AE.object
+    [ "label" .= label
+    , "data" .= data_
+    , "fill" .= False
+    , "backgroundColor" .= color
+    , "borderColor" .= color
+    ]
diff --git a/client/src/View/Statistics/Statistics.hs b/client/src/View/Statistics/Statistics.hs
new file mode 100644
index 0000000..d931b2b
--- /dev/null
+++ b/client/src/View/Statistics/Statistics.hs
@@ -0,0 +1,85 @@
+module View.Statistics.Statistics
+  ( view
+  , In(..)
+  ) where
+
+import           Control.Monad         (void)
+import           Data.Map              (Map)
+import qualified Data.Map              as M
+import qualified Data.Text             as T
+import           Data.Time.Calendar    (Day)
+import qualified Data.Time.Calendar    as Calendar
+import           Loadable              (Loadable)
+import qualified Loadable
+import           Reflex.Dom            (Dynamic, MonadWidget)
+import qualified Reflex.Dom            as R
+import qualified Util.Ajax             as AjaxUtil
+import qualified View.Statistics.Chart as Chart
+
+import           Common.Model          (Category (..), Currency, Income,
+                                        MonthStats (..), Stats, User (..))
+import qualified Common.Msg            as Msg
+import qualified Common.View.Format    as Format
+
+data In = In
+  { _in_currency    :: Currency
+  }
+
+view :: forall t m. MonadWidget t m => In -> m ()
+view input = do
+
+  users <- AjaxUtil.getNow "api/users"
+  categories <- AjaxUtil.getNow "api/allCategories"
+  statistics <- AjaxUtil.getNow "api/statistics"
+
+  let loadable = (\u c s -> (,,) <$> u <*> c <*> s) <$> users <*> categories <*> statistics
+
+  R.divClass "withMargin" $
+    R.divClass "titleButton" $
+      R.el "h1" $
+        R.text $ Msg.get Msg.Statistics_Title
+
+  void . R.dyn . R.ffor loadable . Loadable.viewHideValueWhileLoading $
+    stats (_in_currency input)
+
+stats :: forall t m. MonadWidget t m => Currency -> ([User], [Category], Stats) -> m ()
+stats currency (users, categories, stats) =
+  Chart.view $ Chart.In
+    { Chart._in_title = Msg.get (Msg.Statistics_ByMonthsAndMean averagePayment averageIncome)
+    , Chart._in_labels = map (Format.monthAndYear . _monthStats_start) stats
+    , Chart._in_datasets = totalIncomeDataset : totalPaymentDataset : (map categoryDataset categories)
+    }
+
+  where
+    averageIncome =
+      Format.price currency $ sum  totalIncomes `div` length stats
+
+    totalIncomeDataset =
+      Chart.Dataset
+        { Chart._dataset_label = Msg.get Msg.Statistics_TotalIncomes
+        , Chart._dataset_data  = totalIncomes
+        , Chart._dataset_color = "#222222"
+        }
+
+    totalIncomes =
+      map (sum . map snd . M.toList . _monthStats_incomeByUser) stats
+
+    averagePayment =
+      Format.price currency $ sum totalPayments `div` length stats
+
+    totalPaymentDataset =
+      Chart.Dataset
+        { Chart._dataset_label = Msg.get Msg.Statistics_TotalPayments
+        , Chart._dataset_data  = totalPayments
+        , Chart._dataset_color = "#555555"
+        }
+
+    totalPayments =
+      map (sum . map snd . M.toList . _monthStats_paymentsByCategory) stats
+
+    categoryDataset category =
+      Chart.Dataset
+        { Chart._dataset_label = _category_name category
+        , Chart._dataset_data  = map (M.findWithDefault 0 (_category_id category) . _monthStats_paymentsByCategory) stats
+        , Chart._dataset_color = _category_color category
+        }