Show payment stats

6 files changed, 203 insertions, 17 deletions

diff --git a/client/client.cabal b/client/client.cabal
index 227aed2..cf2c5a1 100644
--- a/client/client.cabal
+++ b/client/client.cabal
@@ -86,3 +86,5 @@ Executable client
     View.Payment.Reducer
     View.Payment.Table
     View.SignIn
+    View.Statistics.Chart
+    View.Statistics.Statistics
diff --git a/client/src/Model/Route.hs b/client/src/Model/Route.hs
index 63e5d10..f92e9be 100644
--- a/client/src/Model/Route.hs
+++ b/client/src/Model/Route.hs
@@ -6,5 +6,6 @@ data Route
   = RootRoute
   | IncomeRoute
   | CategoryRoute
+  | StatisticsRoute
   | NotFoundRoute
   deriving (Eq, Show)
diff --git a/client/src/View/App.hs b/client/src/View/App.hs
index b0b89fb..71f0234 100644
--- a/client/src/View/App.hs
+++ b/client/src/View/App.hs
@@ -2,23 +2,24 @@ 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 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 =
@@ -77,6 +78,11 @@ signedWidget init route = do
         , Category._in_users = _init_users init
         }
 
+    StatisticsRoute ->
+      Statistics.view $ Statistics.In
+        { Statistics._in_currency = _init_currency init
+        }
+
     NotFoundRoute ->
       NotFound.view
 
@@ -95,5 +101,8 @@ getRoute = do
     ["category"] ->
       CategoryRoute
 
+    ["statistics"] ->
+      StatisticsRoute
+
     _ ->
       NotFoundRoute
diff --git a/client/src/View/Header.hs b/client/src/View/Header.hs
index f91c408..ff9f40a 100644
--- a/client/src/View/Header.hs
+++ b/client/src/View/Header.hs
@@ -67,6 +67,11 @@ links route = do
     (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" $
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..71f93d4
--- /dev/null
+++ b/client/src/View/Statistics/Statistics.hs
@@ -0,0 +1,67 @@
+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, PaymentStats)
+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
+
+  categories <- AjaxUtil.getNow "api/allCategories"
+  statistics <- AjaxUtil.getNow "api/statistics"
+  let categoriesAndStatistics = (\c s -> (,) <$> c <*> s) <$> categories <*> statistics
+
+  R.divClass "withMargin" $
+    R.divClass "titleButton" $
+      R.el "h1" $
+        R.text $ Msg.get Msg.Statistics_Title
+
+  void . R.dyn . R.ffor categoriesAndStatistics . Loadable.viewHideValueWhileLoading $
+    stats (_in_currency input)
+
+stats :: forall t m. MonadWidget t m => Currency -> ([Category], PaymentStats) -> m ()
+stats currency (categories, stats) =
+  Chart.view $ Chart.In
+    { Chart._in_title = Msg.get (Msg.Statistics_ByMonthsAndMean averageEachMonth)
+    , Chart._in_labels = map (Format.monthAndYear . fst) stats
+    , Chart._in_datasets =
+      Chart.Dataset
+        { Chart._dataset_label = Msg.get Msg.Statistics_Total
+        , Chart._dataset_data  = totalSeries
+        , Chart._dataset_color = "#555555"
+        } : (map categoryDataset categories)
+    }
+
+  where
+    averageEachMonth =
+      Format.price currency $ sum totalSeries `div` length stats
+
+    totalSeries =
+      map (sum . map snd . M.toList . snd) stats
+
+    categoryDataset category =
+      Chart.Dataset
+        { Chart._dataset_label = _category_name category
+        , Chart._dataset_data  = map (M.findWithDefault 0 (_category_id category) . snd) stats
+        , Chart._dataset_color = _category_color category
+        }