feat: task manager

internal/task/task.go

@@ -1,10 +1,36 @@
 // manage task, such as file upload, file copy between accounts, offline download, etc.
 package task
 
+type Func func(task *Task) error
+
+var (
+	PENDING  = "pending"
+	RUNNING  = "running"
+	FINISHED = "finished"
+)
+
 type Task struct {
-	Name     string
-	Status   string
-	Error    error
-	Finish   bool
-	Children []*Task
+	ID     int64
+	Name   string
+	Status string
+	Error  error
+	Func   Func
+}
+
+func NewTask(name string, func_ Func) *Task {
+	return &Task{
+		Name:   name,
+		Status: PENDING,
+		Func:   func_,
+	}
+}
+
+func (t *Task) SetStatus(status string) {
+	t.Status = status
+}
+
+func (t *Task) Run() {
+	t.Status = RUNNING
+	t.Error = t.Func(t)
+	t.Status = FINISHED
 }