twitter: switch to tweepy

python-twitter has stopped working after Twitter upstream removed an
endpoint it was querying.  Switch to the better maintained tweepy,
which is basically the same.

tweepy doesn't automatically split tweets, so implement that.  Split
tweets will now be in reply to each other, which is a feature.

Change-Id: Id40af0e314ce8a6cb542f6138f5deaa8a587b260

requirements.txt

@@ -4,5 +4,5 @@ simplemediawiki>=1.2.0b2
 irc
 python-daemon
 kitchen
-python-twitter>=3.4
+tweepy
 ib3

statusbot/bot.py

@@ -69,7 +69,8 @@ import simplemediawiki
 import datetime
 import re
 import requests
-import twitter
+import tweepy
+import textwrap
 import urllib
 
 try:
@@ -244,14 +245,31 @@ class Tweet(UpdateInterface):
         self.consumer_secret = config.get('twitter', 'consumer_secret')
         self.access_token_key = config.get('twitter', 'access_token_key')
         self.access_token_secret = config.get('twitter', 'access_token_secret')
-        self.api = twitter.Api(
-            consumer_key=self.consumer_key,
-            consumer_secret=self.consumer_secret,
-            access_token_key=self.access_token_key,
-            access_token_secret=self.access_token_secret)
+
+        auth = tweepy.OAuthHandler(self.consumer_key, self.consumer_secret)
+        auth.set_access_token(self.access_token_key, self.access_token_secret)
+
+        self.api = tweepy.API(auth)
 
     def update(self, msg):
-        self.api.PostUpdates(msg, continuation=u'\u2026')
+        # NOTE(ianw) python-twitter, used originally, used to do some
+        # automated splitting.  It didn't account for emoji,
+        # link-shortening, etc.  Ergo, this could be better, but KISS
+        # for now
+        tweets = textwrap.wrap(msg, 270)
+        if len(tweets) > 1:
+            for i in range(0, len(tweets)):
+                tweet = tweets[i]
+                tweets[i] = tweet + " %d/%d" % (i+1, len(tweets))
+
+        last_tweet = None
+        for tweet in tweets:
+            if not last_tweet:
+                last_tweet = self.api.update_status(status=tweet)
+            else:
+                last_tweet = self.api.update_status(status=tweet,
+                                                    in_reply_to_status_id = last_tweet.id,
+                                                    auto_populate_reply_metadata=True)
 
     def alert(self, msg=None):
         self.update(msg)