commit 3619e9390b2f0df2bfa2a56f584aaa6e58cba06b Author: Akshay Mankar Date: Wed Oct 25 00:15:11 2023 +0200 Scrape and send to 1 chat diff --git a/berlin-scraper/CHANGELOG.md b/berlin-scraper/CHANGELOG.md new file mode 100644 index 0000000..7641c1e --- /dev/null +++ b/berlin-scraper/CHANGELOG.md @@ -0,0 +1,5 @@ +# Revision history for berlin-scraper + +## 0.1.0.0 -- YYYY-mm-dd + +* First version. Released on an unsuspecting world. diff --git a/berlin-scraper/LICENSE b/berlin-scraper/LICENSE new file mode 100644 index 0000000..dba13ed --- /dev/null +++ b/berlin-scraper/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + 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 AGPL, see +. diff --git a/berlin-scraper/app/Main.hs b/berlin-scraper/app/Main.hs new file mode 100644 index 0000000..6d6f66d --- /dev/null +++ b/berlin-scraper/app/Main.hs @@ -0,0 +1,235 @@ +{-# LANGUAGE BlockArguments #-} +{-# LANGUAGE DataKinds #-} +{-# LANGUAGE LambdaCase #-} +{-# LANGUAGE OverloadedRecordDot #-} +{-# LANGUAGE OverloadedStrings #-} +{-# LANGUAGE RecordWildCards #-} + +module Main where + +import Control.Lens (view) +import Control.Monad (when) +import Control.Monad.IO.Class +import Data.Aeson hiding (Options) +import Data.Aeson qualified as Aeson +import Data.ByteString.Lazy qualified as LBS +import Data.Maybe (fromJust, fromMaybe, listToMaybe) +import Data.Text qualified as Text +import Data.Text.Encoding qualified as Text +import Data.Text.IO qualified as Text +import Database.SQLite.Simple +import GHC.Generics +import Network.Wreq hiding (Options) +import Options.Generic +import System.Exit (exitFailure) +import Telegram.Bot.API +import Telegram.Bot.Simple +import Telegram.Bot.Simple.Debug +import Text.HTML.Scalpel + +main :: IO () +main = do + opts <- unwrapRecord "Berlin Scrapper" + token <- getEnvToken "TELEGRAM_BOT_TOKEN" + clientEnv <- defaultTelegramClientEnv token + startBot (traceBotDefault $ botApp opts) clientEnv >>= \case + Left err -> do + putStrLn $ "Bot failed with: " <> show err + exitFailure + _ -> pure () + +-- * Types + +newtype Options w = Options {dbFile :: w ::: FilePath "Path to the sqlite database"} + deriving (Generic) + +instance ParseRecord (Options Wrapped) + +data Offer = Offer + { id_ :: Text, + title :: Text, + address :: Maybe Text, + rooms :: Maybe Double, + area :: Maybe Double, + availableFrom :: Maybe Text, + link :: Text + } + deriving (Show, Generic) + +instance FromRow Offer + +instance ToRow Offer + +data IBWResponse = IBWResponse + { headline :: Text, + searchresults :: Text + } + deriving (Generic) + +instance FromJSON IBWResponse + +-- * Parsing + +queryIBW :: IO IBWResponse +queryIBW = do + let reqBody = + [ partText "q" "wf-save-srch", + partText "save" "false", + partText "heizung_zentral" "false", + partText "heizung_etage" "false", + partText "energy_fernwaerme" "false", + partText "heizung_nachtstrom" "false", + partText "heizung_ofen" "false", + partText "heizung_gas" "false", + partText "heizung_oel" "false", + partText "heizung_solar" "false", + partText "heizung_erdwaerme" "false", + partText "heizung_fussboden" "false", + partText "seniorenwohnung" "false", + partText "maisonette" "false", + partText "etagen_dg" "false", + partText "balkon_loggia_terrasse" "false", + partText "garten" "false", + partText "wbs" "0", + partText "barrierefrei" "false", + partText "gaeste_wc" "false", + partText "aufzug" "false", + partText "stellplatz" "false", + partText "keller" "false", + partText "badewanne" "false", + partText "dusche" "false", + partText "bez[]" "01_00", + partText "bez[]" "02_00", + partText "bez[]" "04_00", + partText "bez[]" "07_00", + partText "bez[]" "08_00", + partText "bez[]" "09_00", + partText "bez[]" "11_00" + ] + let link = "https://inberlinwohnen.de/wp-content/themes/ibw/skript/wohnungsfinder.php" + resBS <- view responseBody <$> post link reqBody + pure $ fromJust $ decode @IBWResponse resBS + +scrapeOffers :: Scraper Text [Offer] +scrapeOffers = do + let listItemsSelector = "div" @: [hasClass "result-list"] // "ul" // "li" + chroots listItemsSelector scrapeOffer + +scrapeOffer :: Scraper Text Offer +scrapeOffer = do + title <- Text.strip <$> text "h3" + + let tableSelector = "div" @: [hasClass "tb-merkdetails"] // "div" @: [hasClass "span_wflist_data"] // "table" @: [hasClass "fullw"] // "tbody" + rowsSelector = tableSelector // "tr" + tableDataParser = do + thVal <- text "th" + (Text.strip thVal,) <$> text "td" + allTableData <- chroots rowsSelector tableDataParser + let address = lookup "Adresse:" allTableData + roomsStr = lookup "Zimmeranzahl:" allTableData + rooms = readEuropeanNumber <$> roomsStr + areaStr = lookup "Wohnfläche:" allTableData + area = readEuropeanNumber <$> (Text.stripSuffix " m²" =<< areaStr) + availableFrom = lookup "Bezugsfertig ab:" allTableData + + link <- attr "href" $ "a" @: [hasClass "org-but"] + id_ <- attr "id" "li" + pure Offer {..} + +readEuropeanNumber :: Text -> Double +readEuropeanNumber x = do + read $ Text.unpack $ Text.replace "," "." x + +-- * SQLite + +insertOffer :: Connection -> Offer -> IO () +insertOffer conn = + execute conn "INSERT INTO offers (id, title, address, rooms, area, availableFrom, link) VALUES (?, ?, ?, ?, ?, ?, ?)" + +getOffer :: Connection -> Text -> IO (Maybe Offer) +getOffer conn offerId = + listToMaybe <$> query conn "SELECT * from offers where id = ?" (Only offerId) + +createTable :: Connection -> IO () +createTable conn = + execute_ conn "CREATE TABLE IF NOT EXISTS offers (id TEXT PRIMARY KEY, title TEXT, address TEXT, rooms REAL, area REAL, availableFrom TEXT, link TEXT)" + +saveOffer :: Connection -> Offer -> IO Bool +saveOffer conn offer = do + getOffer conn offer.id_ >>= \case + Nothing -> do + insertOffer conn offer + pure True + _ -> pure False + +-- * Telegram + +type Model = () + +newtype Action = StartChat Chat + deriving (Show) + +botApp :: Options Unwrapped -> BotApp Model Action +botApp opts = + BotApp + { botInitialModel = (), + botAction = action, + botHandler = handler, + botJobs = [scrapeJob opts] + } + +action :: Update -> Model -> Maybe Action +action update _ = do + msg <- update.updateMessage + txt <- msg.messageText + if txt == "/start" + then pure $ StartChat msg.messageChat + else Nothing + +handler :: Action -> Model -> Eff Action Model +handler (StartChat chat) model = + model <# do + liftIO $ putStrLn $ "Chat started! " <> ppAsJSON chat + +scrapeJob :: Options Unwrapped -> BotJob Model Action +scrapeJob opts = + BotJob + { botJobSchedule = "* * * * *", + botJobTask = scrapeJobTask opts + } + +scrapeJobTask :: Options Unwrapped -> Model -> Eff Action Model +scrapeJobTask opts m = + m <# do + liftIO $ putStrLn "Starting scrape job" + res <- liftIO queryIBW + let offers = fromJust $ scrapeStringLike res.searchresults scrapeOffers + liftIO $ putStrLn "Fetched offers" + conn <- liftIO $ open (dbFile opts) + liftIO $ createTable conn + mapM_ + ( \offer -> do + isNewOffer <- liftIO $ saveOffer conn offer + when isNewOffer $ do + liftIO $ putStrLn "Found a new offer" + notify offer + ) + offers + +notify :: Offer -> BotM () +notify offer = do + let offerTitle = "" <> offer.title <> "" + offerAddress = "Address: " <> fromMaybe "N/A" offer.address + offerRooms = "Rooms: " <> maybe "N/A" (Text.pack . show) offer.rooms + offerArea = "Area: " <> maybe "N/A" ((<> " m²") . Text.pack . show) offer.area + offerLink = " offer.link <> "\" >Apply Here" + offerBody = offerAddress <> "\n" <> offerRooms <> "\n" <> offerArea <> "\n" <> offerLink + offerText = offerTitle <> "\n\n" <> offerBody + sendMsgReq = (defSendMessage (SomeChatId $ ChatId 952512153) offerText) {sendMessageParseMode = Just HTML} + res <- runTG sendMsgReq + liftIO $ + if res.responseOk + then putStrLn "Notified successfully" + else do + putStrLn $ "Failed to notify the offer: " <> show offer + Text.putStrLn $ "Response: " <> Text.decodeUtf8 (LBS.toStrict $ Aeson.encode res) diff --git a/berlin-scraper/berlin-scraper.cabal b/berlin-scraper/berlin-scraper.cabal new file mode 100644 index 0000000..2f51f60 --- /dev/null +++ b/berlin-scraper/berlin-scraper.cabal @@ -0,0 +1,30 @@ +cabal-version: 3.0 +name: berlin-scraper +version: 0.1.0.0 +license: AGPL-3.0-or-later +license-file: LICENSE +author: Akshay Mankar +maintainer: itsakshaymankar@gmail.com +category: Web +build-type: Simple +extra-doc-files: CHANGELOG.md + +common warnings + ghc-options: -Wall + +executable berlin-scraper + import: warnings + main-is: Main.hs + build-depends: base ^>=4.17.1.0 + , scalpel + , aeson + , wreq + , text + , lens + , sqlite-simple + , optparse-generic + , telegram-bot-simple + , telegram-bot-api + , bytestring + hs-source-dirs: app + default-language: GHC2021 diff --git a/berlin-scraper/default.nix b/berlin-scraper/default.nix new file mode 100644 index 0000000..e85f4e5 --- /dev/null +++ b/berlin-scraper/default.nix @@ -0,0 +1,17 @@ +{ mkDerivation, aeson, base, bytestring, lens, lib +, optparse-generic, scalpel, sqlite-simple, telegram-bot-api +, telegram-bot-simple, text, wreq +}: +mkDerivation { + pname = "berlin-scraper"; + version = "0.1.0.0"; + src = ./.; + isLibrary = false; + isExecutable = true; + executableHaskellDepends = [ + aeson base bytestring lens optparse-generic scalpel sqlite-simple + telegram-bot-api telegram-bot-simple text wreq + ]; + license = lib.licenses.agpl3Plus; + mainProgram = "berlin-scraper"; +} diff --git a/flake.lock b/flake.lock new file mode 100644 index 0000000..abe2dae --- /dev/null +++ b/flake.lock @@ -0,0 +1,61 @@ +{ + "nodes": { + "flake-utils": { + "inputs": { + "systems": "systems" + }, + "locked": { + "lastModified": 1694529238, + "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=", + "owner": "numtide", + "repo": "flake-utils", + "rev": "ff7b65b44d01cf9ba6a71320833626af21126384", + "type": "github" + }, + "original": { + "owner": "numtide", + "repo": "flake-utils", + "type": "github" + } + }, + "nixpkgs": { + "locked": { + "lastModified": 1697915759, + "narHash": "sha256-WyMj5jGcecD+KC8gEs+wFth1J1wjisZf8kVZH13f1Zo=", + "owner": "NixOS", + "repo": "nixpkgs", + "rev": "51d906d2341c9e866e48c2efcaac0f2d70bfd43e", + "type": "github" + }, + "original": { + "owner": "NixOS", + "ref": "nixpkgs-unstable", + "repo": "nixpkgs", + "type": "github" + } + }, + "root": { + "inputs": { + "flake-utils": "flake-utils", + "nixpkgs": "nixpkgs" + } + }, + "systems": { + "locked": { + "lastModified": 1681028828, + "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=", + "owner": "nix-systems", + "repo": "default", + "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e", + "type": "github" + }, + "original": { + "owner": "nix-systems", + "repo": "default", + "type": "github" + } + } + }, + "root": "root", + "version": 7 +} diff --git a/flake.nix b/flake.nix new file mode 100644 index 0000000..32d4244 --- /dev/null +++ b/flake.nix @@ -0,0 +1,37 @@ +{ + description = "Dev Setup"; + + inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; + inputs.flake-utils.url = "github:numtide/flake-utils"; + + outputs = {nixpkgs, flake-utils, ...}: + flake-utils.lib.eachDefaultSystem (system: + let + pkgs = import nixpkgs { inherit system; }; + ghcOverrides = hself: hsuper: rec { + berlin-scraper = hself.callPackage ./berlin-scraper {}; + }; + haskellPackages = pkgs.haskellPackages.override { + overrides = ghcOverrides; + }; + in rec { + packages = rec { + dev-env = haskellPackages.shellFor { + packages = p: [ p.berlin-scraper ]; + buildInputs = [ + pkgs.haskellPackages.cabal-install + pkgs.haskell-language-server + pkgs.cabal2nix + + # For cabal + pkgs.pkg-config + pkgs.binutils + pkgs.xq + pkgs.htmlq + pkgs.dasel + ]; + }; + }; + defaultPackage = packages.dev-env; + }); +}