Create separate fetchFile function and add some comments

src/Main.hs

@@ -6,7 +6,7 @@ import System.Environment
 import Data.Time.Clock
 import Data.Time.Format
 import Data.Time.Clock.POSIX
-import Network.HTTP.Conduit
+import Network.HTTP.Conduit (simpleHttp)
 import Data.List.Split
 import Data.Algorithm.Diff
 import Data.Algorithm.DiffOutput
@@ -20,38 +20,47 @@ isChanged :: Diff f -> Bool
 isChanged (First _) = True
 isChanged _ = False
 
+hasDiff :: [a] -> Bool
+hasDiff [] = False
+hasDiff _ = True
+
+-- Changes as one string if they exsists
 getChanges :: [String] -> [String] -> Maybe String
 getChanges now before = if (hasDiff ch) then Just res else Nothing
   where ch = filter isChanged diff
         diff = getDiff now before
         res = foldr (\(First x) y -> x ++ " \n " ++ y) "" ch
 
--- Should stop the script if there's a checkbox with a keyword `stop`
+-- TODO
+-- Should return signal to stop the script if there's a checkbox with a keyword `stop`
 showRunning :: [String] -> GeneratorState
 showRunning html = IsRunning
 
+-- Printing time diff in %H:%M:%S format
 myFormatDiffTime :: (UTCTime, UTCTime) -> String
 myFormatDiffTime (a,b)= formatTime defaultTimeLocale "%H:%M:%S" . posixSecondsToUTCTime $ diffUTCTime  a b
 
-hasDiff :: [a] -> Bool
-hasDiff [] = False
-hasDiff _ = True
-
-
+-- Printing changes is they exsists
 genOutput :: Maybe String -> String -> IO ()
 genOutput (Just changes) time = do
   putStrLn $ time ++ "\n " ++ changes
 genOutput Nothing _ = return()
 
 
+fetchFile :: IO [String]
+fetchFile = do
+    html <- simpleHttp "https://hd.socks.town/s/h0jnEJQWy/download"
+    return $ (splitOn ("\n")) . toString $ html
+  
+-- Main Loop
 timecodeGenerator :: GeneratorState -> [String] -> UTCTime -> IO ()
 timecodeGenerator IsFinished _ _  = return ()
 timecodeGenerator IsRunning prevFile time = do
-    html <- simpleHttp "https://hd.socks.town/s/h0jnEJQWy/download"
+    newFile <- fetchFile
     currTime <- getCurrentTime
-    let newFile =  (splitOn ("\n")) . toString $ html
     let changes =  getChanges newFile prevFile
     let diffTime =  myFormatDiffTime (currTime, time)
+
     genOutput changes diffTime
     -- Waiting for 1 second
     threadDelay 10000
@@ -64,4 +73,5 @@ timecodeGenerator IsRunning prevFile time = do
 main :: IO ()
 main = do
   time <- getCurrentTime
-  timecodeGenerator IsRunning [""] time
+  file <- fetchFile
+  timecodeGenerator IsRunning file time