Introduce channelCounter function

Signed-off-by: Knut Ahlers <knut@ahlers.me>

msgformatter.go

@@ -25,6 +25,15 @@ func formatMessage(tplString string, m *irc.Message, r *rule, fields map[string]
 		return msgParts[arg], nil
 	}
 
+	messageFunctions["channelCounter"] = func(name string) (string, error) {
+		channel, ok := fields["channel"].(string)
+		if !ok {
+			return "", errors.New("channel not available")
+		}
+
+		return strings.Join([]string{channel, name}, ":"), nil
+	}
+
 	messageFunctions["counterValue"] = func(name string, _ ...string) int64 {
 		return store.GetCounterValue(name)
 	}
@@ -41,7 +50,7 @@ func formatMessage(tplString string, m *irc.Message, r *rule, fields map[string]
 	}
 
 	messageFunctions["recentGame"] = func(username string, v ...string) (string, error) {
-		game, _, err := twitch.getRecentStreamInfo(username)
+		game, _, err := twitch.getRecentStreamInfo(strings.TrimLeft(username, "#"))
 		if err != nil && len(v) > 0 {
 			return v[0], nil
 		}

wiki/Home.md

@@ -68,6 +68,7 @@ There are certain variables available in the strings with templating enabled:
 Additionally there are some functions available in the templates:
 
 - `arg <idx>` - Takes the message sent to the channel, splits by space and returns the Nth element
+- `channelCounter <counter name>` - Wraps the counter name into a channel specific counter name including the channel name
 - `counterValue <counter name>` - Returns the current value of the counter which identifier was supplied
 - `fixUsername <username>` - Ensures the username no longer contains the `@` prefix
 - `group <idx>` - Gets matching group specified by index from `match_message` regular expression
@@ -80,8 +81,8 @@ Additionally there are some functions available in the templates:
 
 ```yaml
   - actions:
-    - counter: '{{ recentGame "mychannel" }}'
-    - respond: 'I already died {{ counterValue (recentGame "mychannel") }} times in {{ recentGame "mychannel" }}'
+    - counter: '{{ channelCounter (recentGame .channel) }}'
+    - respond: 'I already died {{ counterValue (channelCounter (recentGame .channel)) }} times in {{ recentGame .channel }}'
     cooldown: 60s
     enable_on: [broadcaster, moderator]
     match_channels: ['#mychannel']