From ec4132ae41860a77f97b382acad5cf45b117e75d Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Tue, 10 Apr 2012 18:36:06 -0400
Subject: [PATCH] Add the new reply/retweet fields to Status. Take advantage of
 the Maybe monad in the status_from_content function. Reformat a test case.

---
 src/Twitter/Status.hs | 73 +++++++++++++++++++++++++++----------------
 1 file changed, 46 insertions(+), 27 deletions(-)

diff --git a/src/Twitter/Status.hs b/src/Twitter/Status.hs
index 01ef0ab..3414d7c 100644
--- a/src/Twitter/Status.hs
+++ b/src/Twitter/Status.hs
@@ -20,47 +20,59 @@ import Twitter.Xml
 data Status = Status { status_id  :: Integer,
                        created_at :: String,
                        text       :: String,
-                       user       :: User }
+                       user       :: User,
+                       reply      :: Bool,
+                       retweet    :: Bool }
             deriving (Show, Eq)
 
 
 -- |Given some XML content, create a 'Status' from it.
-status_from_content :: Content i -> (Maybe Status)
+status_from_content :: Content i -> Maybe Status
 status_from_content content =
-
     if (length status_ids) == 0
         || (length created_ats) == 0
         || (length texts) == 0
         || (length users) == 0
+        || (length retweeteds) == 0
     then
         Nothing
-    else
-        case first_status_id of
-          Nothing -> Nothing
-          (Just status_id_data) ->
-              case first_created_at of
-                  Nothing -> Nothing
-                  (Just created_at_data) ->
-                          case first_user of
-                              Nothing -> Nothing
-                              (Just user_object) ->
-                                  case (reads status_id_data :: [(Integer, String)]) of
-                                    []   -> Nothing
-                                    parseresult:_ -> Just (Status (fst parseresult) created_at_data all_text user_object)
-
+    else do
+      first_status_id <- get_char_data (status_ids !! 0)
+      integer_status_id <- parse_status_id first_status_id
+      first_created_at <- get_char_data (created_ats !! 0)
+      first_user <- user_from_content (users !! 0)
+      first_retweeted <- get_char_data (retweeteds !! 0)
+
+      let is_reply = case (length reply_to_status_ids) of
+                       0 -> False
+                       _ -> True
+
+      let is_retweet = case first_retweeted of
+                         "true" -> True
+                         _      -> False
+
+      return (Status
+               integer_status_id
+               first_created_at
+               all_text
+               first_user
+               is_reply
+               is_retweet)
     where
       status_ids = (unique_id content)
-      first_status_id = get_char_data (status_ids !! 0)
-
       created_ats = (status_created_at content)
-      first_created_at = get_char_data (created_ats !! 0)
-
       texts = (status_text content)
-      all_text = concat $ catMaybes (map get_char_data texts)
-
       users = (status_user content)
-      first_user = user_from_content (users !! 0)
+      retweeteds = (status_retweeted content)
+      reply_to_status_ids = (status_reply_to_status_id content)
+
+      all_text = concat $ catMaybes (map get_char_data texts)
 
+      parse_status_id :: String -> Maybe Integer
+      parse_status_id s =
+        case (reads s) of
+          [] -> Nothing
+          parseresult:_ -> Just (fst parseresult)
 
 -- |Takes an XML String as an argument, and returns the
 -- status that was parsed from it. Should only be used
@@ -169,13 +181,20 @@ status_tests = [ test_parse_usernames ]
 
 test_parse_usernames :: Test
 test_parse_usernames =
-    TestCase $ assertEqual "All usernames are parsed." expected_usernames actual_usernames
+    TestCase $
+      assertEqual
+      "All usernames are parsed."
+      expected_usernames
+      actual_usernames
     where
       dummy_user = User { screen_name = "nobody" }
       dummy_status = Status { status_id = 1,
                               created_at = "never",
                               text = "Hypothesis: @donsbot and @bonus500 are two personalities belonging to the same person.",
-                              user = dummy_user }
-      
+                              user = dummy_user,
+                              reply = False,
+                              retweet = False
+                            }
+
       actual_usernames = parse_usernames_from_status dummy_status
       expected_usernames = ["donsbot", "bonus500"]
-- 
2.43.2