Add compare by b0nk. And some minor fixes.

LastFM/plugin.py

@@ -109,6 +109,11 @@ class LastFM(callbacks.Plugin):
         self.network = None
         self.prepend = "0,5last.fm"
         self.loved = "13<3 "
+        self.pretty_bar = ["[04====            ]",
+                           "[04====07====        ]",
+                           "[04====07====08====    ]",
+                           "[04====07====08====09====]",
+                           "[                ]"]
 
     def die(self):
         self.__parent.die()
@@ -133,8 +138,13 @@ class LastFM(callbacks.Plugin):
     def setuser(self, irc, msg, args, channel, user):
         """[<channel>] <last.fm user>
 
-        Assigns the <last.fm user> to the current nick, in [channel].
+        Assigns the <last.fm account> to the current nick, in [channel].
         """
+        userinfo = self.network.get_user(user)
+        if not userinfo:
+            irc.error("User not found", prefixNick=False)
+            return
+
         self.db.set_user(channel, msg.nick.lower(), user)
         irc.reply("{} User set as {} for {}".format(
             self.prepend,
@@ -143,6 +153,65 @@ class LastFM(callbacks.Plugin):
             ), prefixNick=False)
     setuser = wrap(setuser, ['channel', 'anything'])
 
+    def compare(self, irc, msg, args, channel, user):
+        """[<channel>] <last.fm account/nick>
+
+        Compares your account with the <last.fm account/nick> account, in [channel].
+        """
+        if self.connect() is False:
+            return
+
+        user1 = msg.nick.lower()
+        user2 = user.lower()
+
+        username1 = self.db.get_user(channel, user1)
+        if not username1:
+            username1 = user1
+        username2 = self.db.get_user(channel, user2)
+        if not username2:
+            username2 = user2
+
+        try:
+            user1_favs = self.network.get_user(username1).get_top_artists('overall', 100)
+            user2_favs = self.network.get_user(username2).get_top_artists('overall', 100)
+        except pylast.WSError as e:
+            irc.error(str(e), prefixNick=False)
+            return
+
+        n_artists1 = len(user1_favs)
+        n_artists2 = len(user2_favs)
+
+        user1_favs = [str(i.item) for i in user1_favs]
+        user2_favs = [str(i.item) for i in user2_favs]
+
+        intersection = [artist for artist in user1_favs if artist in user2_favs]
+        artist_list = intersection[:5]
+
+        comparison_index = round(200.0 * len(intersection) / (n_artists1 + n_artists2), 2)
+
+        if comparison_index < 1.0:
+            bar = self.pretty_bar[4]
+        else:
+            bar = self.pretty_bar[int(comparison_index / 25.01)]
+
+        if artist_list:
+            parsed_list = [str(item) for item in artist_list]
+            chart_text = ", ".join(parsed_list)
+        else:
+            chart_text = "N/A"
+
+
+        message = "{} Comparison: {} {} {}: Similarity: {}% - Common Artists: {}".format(
+                 self.prepend,
+                 user1,
+                 bar,
+                 user2,
+                 comparison_index,
+                 chart_text
+                 )
+        irc.reply(message, prefixNick=False)
+    compare = wrap(compare, ['channel', 'anything'])
+
     def nowplaying(self, irc, msg, args, channel, user):
         """[<channel>] [<last.fm user>]
 
@@ -157,6 +226,10 @@ class LastFM(callbacks.Plugin):
             username = self.db.get_user(channel, msg.nick.lower())
 
         userinfo = self.network.get_user(username)
+        if not userinfo:
+            irc.error("User not found", prefixNick=False)
+            return
+
         track = userinfo.get_now_playing()
 
         if not track: