threadDelay microseconds
--- |Given a 'Message' and a 'Status', update that message's body and
--- subject with the information contained in the status. Returns the
--- updated message.
-message_from_status :: Message -> Status -> Message
-message_from_status message status =
+-- |Given a 'Message', 'Status', and date, update that message's body
+-- and subject with the information contained in the status. Adds a
+-- /Date: / header, and returns the updated message.
+message_from_status :: Message -> String -> Status -> Message
+message_from_status message date status =
message { subject = "Twat: " ++ (screen_name (user status)),
- body = (pretty_print status) }
+ body = (pretty_print status),
+ headers = ((headers message) ++ ["Date: " ++ date])}
-- |This is the main recursive loop. It takes a username, a
recurse username latest_status_id maybe_message
_ -> do
let new_latest_status_id = get_max_status_id new_statuses
- mapM (putStrLn . pretty_print) new_statuses
+ _ <- mapM (putStrLn . pretty_print) new_statuses
case maybe_message of
Nothing -> do
recurse username new_latest_status_id maybe_message
return ()
Just message -> do
- let messages = map (message_from_status message) new_statuses
+ date_header <- construct_date_header
+ let messages = map (message_from_status message (date_header)) new_statuses
sendmail_results <- mapM sendmail messages
- mapM print_sendmail_result sendmail_results
+ _ <- mapM print_sendmail_result sendmail_results
recurse username new_latest_status_id maybe_message
return ()
case from_address of
Nothing -> Nothing
Just fromaddr ->
- Just (Message { headers = [],
+ Just (Message { headers = default_headers,
body = "",
subject = "",
to = toaddr,
from = fromaddr })
-- Execute run_twat on each username in a new thread.
- mapM (forkIO . (run_twat message)) usernames
+ _ <- mapM (forkIO . (run_twat message)) usernames
- forever $ do
+ _ <- forever $ do
-- This thread (the one executing main) doesn't do anything,
-- but when it terminates, so do all the threads we forked.
-- As a result, we need to keep this thread on life support.
thread_sleep heartbeat
return ()
+
+
+-- |A debugging tool that will parse, print, and email a single status
+-- (given by its id).
+twat_single_status :: Integer -> (Maybe Message) -> IO ()
+twat_single_status the_status_id maybe_message = do
+ xmldata <- get_status the_status_id
+
+ -- Parsing an empty result can blow up. Just pretend there are
+ -- no new statuses in that case.
+ let statuses = case xmldata of
+ Just xml -> parse_status xml
+ Nothing -> []
+
+ case (length statuses) of
+ 0 -> do
+ putStrLn "No statuses returned."
+ return ()
+ _ -> do
+ _ <- mapM (putStrLn . pretty_print) statuses
+
+ case maybe_message of
+ Nothing -> do
+ putStrLn "No message object given."
+ return ()
+ Just message -> do
+ date_header <- construct_date_header
+ let messages = map (message_from_status message (date_header)) statuses
+ sendmail_results <- mapM sendmail messages
+ _ <- mapM print_sendmail_result sendmail_results
+ return ()