Add triggers helper method

ext/handlers/command.go

@@ -8,14 +8,21 @@ import (
 	"github.com/PaulSonOfLars/gotgbot/v2/ext"
 )
 
+// Command is the go-to handler for setting up Commands in your bot. By default, it will use telegram-native commands
+// that start with a forward-slash (/), but it can be customised to react to any message starting with a character.
+//
+// For example, a command handler on "help" with the triggers []rune("/!,") would trigger for "/help", "!help", or ",help".
 type Command struct {
 	Triggers     []rune
 	AllowEdited  bool
 	AllowChannel bool
-	Command      string // should be lowercase for case-insensitivity
+	Command      string // set to a lowercase value for case-insensitivity
 	Response     Response
 }
 
+// NewCommand creates a new case-insensitive command.
+// By default, commands do not work on edited messages, or channel posts. These can be enabled by setting the
+// AllowEdited and AllowChannel fields respectively.
 func NewCommand(c string, r Response) Command {
 	return Command{
 		Triggers:     []rune{'/'},
@@ -38,6 +45,12 @@ func (c Command) SetAllowChannel(allow bool) Command {
 	return c
 }
 
+// SetTriggers sets the list of triggers to be used with this command.
+func (c Command) SetTriggers(triggers []rune) Command {
+	c.Triggers = triggers
+	return c
+}
+
 func (c Command) CheckUpdate(b *gotgbot.Bot, ctx *ext.Context) bool {
 	if ctx.Message != nil {
 		if ctx.Message.Text == "" && ctx.Message.Caption == "" {