Bug 1314435 - Add like action to tweets. r=clokep

chat/locales/en-US/twitter.properties

@@ -17,6 +17,8 @@ error.tooLong=Status is over 140 characters.
 error.general=An error %1$S occurred while sending: %2$S
 error.retweet=An error %1$S occurred while retweeting: %2$S
 error.delete=An error %1$S occurred while deleting: %2$S
+error.like=An error %1$S occured while liking: %2$S
+error.unlike=An error %1$S occured while unliking: %2$S
 # LOCALIZATION NOTE (error.descriptionTooLong)
 #   %S is the truncated string that was sent to the server.
 error.descriptionTooLong=Description is over the maximum length (160 characters), it was automatically truncated to: %S.
@@ -36,6 +38,8 @@ action.delete=Delete
 #  %S will be replaced by the screen name of a twitter user.
 action.follow=Follow %S
 action.stopFollowing=Stop following %S
+action.like=Like
+action.unlike=Remove Like
 
 # LOCALIZATION NOTE (event.follow, event.unfollow, event.followed):
 #  This will be displayed in system messages inside the timeline conversation.

chat/protocols/twitter/twitter.js

@@ -78,6 +78,11 @@ Tweet.prototype = {
         let screenName = this._tweet.user.screen_name;
         actions.push(new Action(_("action." + action, screenName),
                                 function() { account[action](screenName); }));
+
+        const favAction = this._tweet.favorited ? "unlike" : "like";
+        actions.push(new Action(_("action." + favAction), () => {
+          this.conversation.like(this._tweet, this._tweet.favorited);
+        }, this));
       }
       else if (this.outgoing && !this._deleted) {
         actions.push(
@@ -392,6 +397,15 @@ TimelineConversation.prototype = {
     }, this);
     this.sendTyping("");
   },
+  like: function(aTweet, aRemoveLike = false) {
+    this._account.like(aTweet, aRemoveLike, function() {
+      aTweet.favorited = !aRemoveLike;
+    }, function(aException, aData) {
+      const messageName = aRemoveLike ? "unlike" : "like";
+      this.systemMessage(_("error." + messageName,
+                          this.parseError(aData), aTweet.text), true);
+    }, this);
+  },
   sendTyping: function(aString) {
     if (aString.length == 0 && this.inReplyToStatusId) {
       delete this.inReplyToStatusId;
@@ -662,6 +676,12 @@ Account.prototype = {
     this.signAndSend("1.1/direct_messages/new.json", null, POSTData, aOnSent,
                      aOnError, aThis);
   },
+  like: function(aTweet, aRemoveLike, aOnSent, aOnError, aThis) {
+    const action = aRemoveLike ? "destroy" : "create";
+    const url = `1.1/favorites/${action}.json`;
+    const POSTData = [["id", aTweet.id_str]];
+    this.signAndSend(url, null, POSTData, aOnSent, aOnError, aThis);
+  },
 
   _friends: null,
   follow: function(aUserName) {