extend !rollout-status to support "list <version>" argument

This code is completely untested.

modules/ffpb_netstatus.py

@@ -122,6 +122,8 @@ def ffpb_highscore(bot, trigger):
         highscores['clients'], pretty_date(int(highscores['clients_ts']))))
 
 
+MAX_ROLLOUTSTATUS_LIST = 42
+
 @willie.module.commands('rollout-status')
 def ffpb_rolloutstatus(bot, trigger):
     """Display statistic on how many nodes have installed which firmware."""
@@ -130,10 +132,10 @@ def ffpb_rolloutstatus(bot, trigger):
     result = {}
     skipped = 0
 
-    arg = trigger.group(2)
+    arg = trigger.group(3)
     # inform users about changed command parameters
-    if arg is not None and arg != 'all':
-        bot.reply('Dieses Kommando nimmt keinen Parameter außer \'all\' mehr an.')
+    if arg is not None and arg not in ['all', 'identify']:
+        bot.reply('Hm? !rollout-status [all|list <version>]')
         return
 
     # get all nodes
@@ -145,9 +147,48 @@ def ffpb_rolloutstatus(bot, trigger):
     offlinenodes = 0
     count_offline = (arg == "all")
 
+    if arg == 'list':
+        list_nodes = trigger.group(4)
+        if list_nodes is None or len(list_nodes) == 0:
+            bot.reply('!rollout-status list <version>')
+            return
+
+        result = {'stable': [], 'testing': []}
+        for item in nodes:
+            release = item.get('firmware')
+            if release != list_nodes:
+                continue
+
+            name = item.get('name', item.get('node_id'))
+            branch = item.get('autoupdater')
+            if branch in result:
+                result[branch].append(name)
+            else:
+                result[branch] = [name]
+
+        total = sum([len(result[x]) for x in result])
+        if total == 0:
+            bot.reply('Niemand benutzt derzeit die Version "{version}".'.format(version=list_nodes))
+            return
+
+        if total > MAX_ROLLOUTSTATUS_LIST:
+            bot.reply('Das betrifft {total} Knoten, mehr als {max} werte ich als IRC-Spam.'.format(total=total, max=MAX_ROLLOUTSTATUS_LIST))
+            return
+
+        for branch, nodes in result:
+            bot.say('{count} Knoten auf {version} "{branch}": {nodes}'.format(
+                branch=branch,
+                version=list_nodes,
+                count=len(nodes),
+                nodes=','.join(nodes),
+            ))
+
+        # respond to the user
+        return
+
     # check each node in ALFRED data
     for item in nodes:
-        if (not count_offline) and (item.get('status') not in ['active','stale']):
+        if (not count_offline) and (item.get('status') not in ['active', 'stale']):
             offlinenodes += 1
             continue