feat: add pikpak offline download function (#6648)

* add pikpak offline download function

* 完善PikPak离线下载功能

* 删除多余的代码

* add task cache to avoid too many requests about API

* 优化Status函数

* 完善所有功能,目前测试无BUG

* 减少缓存时间，优化添加离线任务的参数

internal/offline_download/tool/add.go

@@ -2,13 +2,14 @@ package tool
 
 import (
 	"context"
+	"path/filepath"
+
 	"github.com/alist-org/alist/v3/internal/conf"
 	"github.com/alist-org/alist/v3/internal/errs"
 	"github.com/alist-org/alist/v3/internal/op"
 	"github.com/google/uuid"
 	"github.com/pkg/errors"
 	"github.com/xhofe/tache"
-	"path/filepath"
 )
 
 type DeletePolicy string
@@ -64,11 +65,17 @@ func AddURL(ctx context.Context, args *AddURLArgs) (tache.TaskWithInfo, error) {
 
 	uid := uuid.NewString()
 	tempDir := filepath.Join(conf.Conf.TempDir, args.Tool, uid)
+	deletePolicy := args.DeletePolicy
+	if args.Tool == "pikpak" {
+		tempDir = args.DstDirPath
+		// 防止将下载好的文件删除
+		deletePolicy = DeleteNever
+	}
 	t := &DownloadTask{
 		Url:          args.URL,
 		DstDirPath:   args.DstDirPath,
 		TempDir:      tempDir,
-		DeletePolicy: args.DeletePolicy,
+		DeletePolicy: deletePolicy,
 		tool:         tool,
 	}
 	DownloadTaskManager.Add(t)