diff options
Diffstat (limited to 'src/parser/haskell/Parser')
-rw-r--r-- | src/parser/haskell/Parser/LeboncoinParser.hs | 24 | ||||
-rw-r--r-- | src/parser/haskell/Parser/OuestFranceParser.hs | 27 | ||||
-rw-r--r-- | src/parser/haskell/Parser/Utils.hs | 49 |
3 files changed, 100 insertions, 0 deletions
diff --git a/src/parser/haskell/Parser/LeboncoinParser.hs b/src/parser/haskell/Parser/LeboncoinParser.hs new file mode 100644 index 0000000..48eb80f --- /dev/null +++ b/src/parser/haskell/Parser/LeboncoinParser.hs @@ -0,0 +1,24 @@ +module Parser.LeboncoinParser + ( parse + ) where + +import Data.Maybe (catMaybes) +import Data.Text (Text) +import qualified Data.Text as T +import Text.HTML.TagSoup + +import Model.Ad (Ad (Ad)) +import Parser.Utils + +parse :: Text -> [Ad] +parse page = + catMaybes . fmap parseAd $ partitions (~== "<a>") tags + where tags = getTagsBetween "<li itemtype=http://schema.org/Offer>" "<div class=information-immo_content>" (parseTags page) + +parseAd :: [Tag Text] -> Maybe Ad +parseAd tags = do + name <- getTagTextAfter "<h2 class=item_title>" tags + location <- getTagAttribute "<meta itemprop=address>" (T.pack "content") tags + let price = getTagTextAfter "<h3 class=item_price>" tags + url <- getTagAttribute "<a>" (T.pack "href") tags + return (Ad name location price (T.concat [T.pack "https:", url])) diff --git a/src/parser/haskell/Parser/OuestFranceParser.hs b/src/parser/haskell/Parser/OuestFranceParser.hs new file mode 100644 index 0000000..a7b6360 --- /dev/null +++ b/src/parser/haskell/Parser/OuestFranceParser.hs @@ -0,0 +1,27 @@ +module Parser.OuestFranceParser + ( parse + ) where + +import Data.Maybe (catMaybes) +import Data.Text (Text) +import qualified Data.Text as T + +import Text.HTML.TagSoup + +import Model.Ad (Ad (Ad)) + +import Parser.Utils + +parse :: Text -> [Ad] +parse page = + catMaybes . fmap parseAd $ partitions (~== "<a>") tags + where tags = getTagsBetween "<div id=listAnnonces>" "<div id=interactions>" (parseTags page) + +parseAd :: [Tag Text] -> Maybe Ad +parseAd tags = do + name <- getTagTextAfter "<span class=annTitre>" tags + location <- getTagTextAfter "<span class=annVille>" tags + let price = getTagTextAfter "<span class=annPrix>" tags + let startUrl = T.pack "https://www.ouestfrance-immo.com/" + url <- getTagAttribute "<a>" (T.pack "href") tags + return (Ad name location price (T.concat [startUrl, url])) diff --git a/src/parser/haskell/Parser/Utils.hs b/src/parser/haskell/Parser/Utils.hs new file mode 100644 index 0000000..7c433c6 --- /dev/null +++ b/src/parser/haskell/Parser/Utils.hs @@ -0,0 +1,49 @@ +module Parser.Utils + ( getTagsBefore + , getTagsAfter + , getTagsBetween + , getTagAttributes + , getTagAttribute + , getTagTextAfter + ) where + +import Data.List (find, findIndex) +import Data.Maybe (catMaybes, listToMaybe) +import Data.Text (Text) +import qualified Data.Text as T + +import Text.HTML.TagSoup + +getTagsBefore :: String -> [Tag Text] -> [Tag Text] +getTagsBefore selector = takeWhile (~/= selector) + +getTagsAfter :: String -> [Tag Text] -> [Tag Text] +getTagsAfter selector = drop 1 . dropWhile (~/= selector) + +getTagsBetween :: String -> String -> [Tag Text] -> [Tag Text] +getTagsBetween begin end = getTagsBefore end . getTagsAfter begin + +getTagAttributes :: String -> Text -> [Tag Text] -> [Text] +getTagAttributes selector attribute = + catMaybes + . fmap (maybeTagAttribute attribute) + . filter (~== selector) + +getTagAttribute :: String -> Text -> [Tag Text] -> Maybe Text +getTagAttribute selector attribute = + listToMaybe + . getTagAttributes selector attribute + +getTagTextAfter :: String -> [Tag Text] -> Maybe Text +getTagTextAfter selector tags = + case findIndex (~== selector) tags of + Just index -> fmap T.strip $ safeGetAt (index + 1) tags >>= maybeTagText + Nothing -> Nothing + +maybeTagAttribute :: Text -> Tag Text -> Maybe Text +maybeTagAttribute name (TagOpen _ xs) = + fmap snd . find (\(x, _) -> x == name) $ xs +maybeTagAttribute _ _ = Nothing + +safeGetAt :: Int -> [a] -> Maybe a +safeGetAt index = listToMaybe . drop index |