src/Main.hs


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module Main
  ( main
  ) where

import Data.List (intersperse)

import Control.Concurrent (threadDelay)

import Ad (getResumes)

import Model.Ad
import Model.URL
import Model.Resume (getURLs, getNewResumes)

import View.Ad (renderResume)

import Page
import Parser.Detail

url :: URL
url = "http://www.leboncoin.fr/annonces/offres/corse/"

main :: IO ()
main = initListenToNewResumes

initListenToNewResumes :: IO ()
initListenToNewResumes = do
  eitherResumes <- getResumes url
  case eitherResumes of
    Left error -> do
      putStrLn error
      waitOneMinute
      initListenToNewResumes
    Right resumes ->
      let viewedURLs = getURLs resumes
      in  do
            putStrLn "Initialization complete"
            waitOneMinute
            listenToNewResumes viewedURLs

listenToNewResumes :: [URL] -> IO ()
listenToNewResumes viewedURLs = do
  eitherResumes <- getResumes url
  case eitherResumes of
    Left error -> do
      putStrLn error
      waitOneMinute
      listenToNewResumes viewedURLs
    Right resumes ->
      let (newViewdURLs, newResumes) = getNewResumes viewedURLs resumes
          newAdsCount = length newResumes
      in  do
            if newAdsCount > 0
              then
                do
                  putStrLn ("Got " ++ (show newAdsCount) ++ " new ads.\n")
                  putStrLn (concat . intersperse "\n\n" . map renderResume $ newResumes)
              else
                return ()
            waitOneMinute
            listenToNewResumes newViewdURLs

waitOneMinute :: IO ()
waitOneMinute = threadDelay (1000 * 1000 * 60)