Add a limit to the title length

Added a limit to how long the title can be when set from the /playing
command.  The default value is 50 if it is not in the settings file or
if the value in the settings is below zero.

Resolves #43

chatcommands.go

@@ -127,6 +127,10 @@ var commands = &CommandControl{
 				title = strings.TrimSpace(title)
 				link = strings.TrimSpace(link)
 
+				if len(title) > settings.TitleLength {
+					return fmt.Sprintf("Title too long (%d/%d)", len(title), settings.TitleLength)
+				}
+
 				// Send a notice to the mods and admins
 				if len(link) == 0 {
 					cl.belongsTo.AddModNotice(cl.name + " set the playing title to '" + title + "' with no link")

settings.go

@@ -18,6 +18,7 @@ type Settings struct {
 	filename        string
 	cmdLineKey      string // stream key from the command line
 	MaxMessageCount int
+	TitleLength     int // maximum length of the title that can be set with the /playing
 	AdminPassword   string
 	Bans            []BanInfo
 	StreamKey       string
@@ -40,6 +41,10 @@ func init() {
 		panic("Missing stream key is settings.json")
 	}
 
+	if settings.TitleLength <= 0 {
+		settings.TitleLength = 50
+	}
+
 	// Save admin password to file
 	if err = settings.Save(); err != nil {
 		panic("Unable to save settings: " + err.Error())

settings_example.json

@@ -1,7 +1,8 @@
 {
 	"MaxMessageCount": 300,
+    "TitleLength": 50,
 	"AdminPassword": "",
 	"Bans": [],
 	"StreamKey": "ALongStreamKey",
 	"ListenAddress": ":8089"
-}
+}