feat: supports batch operation of tasks by filter (#753)

pkg/download/model.go

@@ -112,6 +112,16 @@ func (t *Task) calcSpeed(speedArr []int64, downloaded int64, usedTime float64) i
 	return int64(float64(total) / float64(len(speedArr)) / usedTime)
 }
 
+type TaskFilter struct {
+	IDs         []string
+	Statuses    []base.Status
+	NotStatuses []base.Status
+}
+
+func (f *TaskFilter) IsEmpty() bool {
+	return len(f.IDs) == 0 && len(f.Statuses) == 0 && len(f.NotStatuses) == 0
+}
+
 type DownloaderConfig struct {
 	Controller    *controller.Controller
 	FetchManagers []fetcher.FetcherManager