Support slash commands in telegram group chats

lib/discourse_chat/provider/telegram/telegram_command_controller.rb

@@ -63,6 +63,7 @@ module DiscourseChat::Provider::TelegramProvider
       tokens = message['text'].split(" ")
 
       tokens[0][0] = '' # Remove the slash from the first token
+      tokens[0] = tokens[0].split('@')[0] # Remove the bot name from the command (necessary for group chats)
 
       return ::DiscourseChat::Helper.process_command(channel, tokens)
     end

spec/lib/discourse_chat/provider/telegram/telegram_command_controller_spec.rb

@@ -80,6 +80,19 @@ describe 'Telegram Command Controller', type: :request do
           expect(rule.tags).to eq(nil)
         end
 
+        it 'should add a new rule correctly using group chat syntax' do
+          post '/chat-integration/telegram/command/shhh.json', message: {chat: {id:123}, text: "/watch@my-awesome-bot #{category.slug}" }
+
+          expect(response.status).to eq(200)
+          expect(stub).to have_been_requested.once
+
+          rule = DiscourseChat::Rule.all.first
+          expect(rule.channel).to eq(chan1)
+          expect(rule.filter).to eq('watch')
+          expect(rule.category_id).to eq(category.id)
+          expect(rule.tags).to eq(nil)
+        end
+
         context 'from an unknown channel' do
           it 'does nothing' do
             post '/chat-integration/telegram/command/shhh.json', message: {chat: {id:456}, text: "/watch #{category.slug}" }