feat: implement task cancellation feature and update task handling

bot/handle_cancel_task.go

@@ -0,0 +1,27 @@
+package bot
+
+import (
+	"strings"
+
+	"github.com/celestix/gotgproto/dispatcher"
+	"github.com/celestix/gotgproto/ext"
+	"github.com/gotd/td/tg"
+	"github.com/krau/SaveAny-Bot/queue"
+)
+
+func cancelTask(ctx *ext.Context, update *ext.Update) error {
+	key := strings.Split(string(update.CallbackQuery.Data), " ")[1]
+	ok := queue.CancelTask(key)
+	if ok {
+		ctx.AnswerCallback(&tg.MessagesSetBotCallbackAnswerRequest{
+			QueryID: update.CallbackQuery.QueryID,
+			Message: "任务已取消",
+		})
+		return dispatcher.EndGroups
+	}
+	ctx.AnswerCallback(&tg.MessagesSetBotCallbackAnswerRequest{
+		QueryID: update.CallbackQuery.QueryID,
+		Message: "任务取消失败",
+	})
+	return dispatcher.EndGroups
+}