Add /leave command

telegram/commands.go

@@ -46,7 +46,7 @@ var chatCommands = map[string]command{
 	"invite":  command{"id or @username", "add user to current chat"},
 	"kick":    command{"id or @username", "remove user to current chat"},
 	"ban":     command{"id or @username [hours]", "restrict @username from current chat for [hours] or forever"},
-	//"leave":      command{"", "leave current chat"},
+	"leave":   command{"", "leave current chat"},
 	//"close":      command{"", "close current secret chat"},
 	//"delete":     command{"", "delete current chat from chat list"},
 	//"members":    command{"[query]", "search members [by optional query] in current chat (requires admin rights)"},
@@ -537,6 +537,29 @@ func (c *Client) ProcessChatCommand(chatID int64, cmdline string) (string, bool)
 				return err.Error(), true
 			}
 		}
+	// leave current chat
+	case "leave":
+		chat, _, err := c.GetContactByID(chatID, nil)
+		if err != nil {
+			return err.Error(), true
+		}
+
+		chatType := chat.Type.ChatTypeType()
+		if chatType == client.TypeChatTypeBasicGroup || chatType == client.TypeChatTypeSupergroup {
+			_, err = c.client.LeaveChat(&client.LeaveChatRequest{
+				ChatId: chatID,
+			})
+			if err != nil {
+				return err.Error(), true
+			}
+
+			gateway.SendPresence(
+				c.xmpp,
+				c.jid,
+				gateway.SPFrom(strconv.FormatInt(chatID, 10)),
+				gateway.SPType("unsubscribed"),
+			)
+		}
 	case "help":
 		return helpString(helpTypeChat), true
 	default: