feat(offline-download): allow using offline download tools in any storage (#7716)

* Feat(offline-download): allow using thunder offline download tool in any storage

* Feat(offline-download): allow using 115 offline download tool in any storage

* Feat(offline-download): allow using pikpak offline download tool in any storage

* style(offline-download): unify offline download tool names

* feat(offline-download): show available offline download tools only

* Fix(offline-download): update unmodified tool names.

---------

Co-authored-by: Andy Hsu <i@nn.ci>

internal/offline_download/tool/add.go

@@ -2,8 +2,12 @@ package tool
 
 import (
 	"context"
+	_115 "github.com/alist-org/alist/v3/drivers/115"
+	"github.com/alist-org/alist/v3/drivers/pikpak"
+	"github.com/alist-org/alist/v3/drivers/thunder"
 	"github.com/alist-org/alist/v3/internal/driver"
 	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/internal/setting"
 	"github.com/alist-org/alist/v3/internal/task"
 	"net/url"
 	"path"
@@ -76,19 +80,26 @@ func AddURL(ctx context.Context, args *AddURLArgs) (task.TaskExtensionInfo, erro
 	tempDir := filepath.Join(conf.Conf.TempDir, args.Tool, uid)
 	deletePolicy := args.DeletePolicy
 
+	// 如果当前 storage 是对应网盘，则直接下载到目标路径，无需转存
 	switch args.Tool {
 	case "115 Cloud":
-		tempDir = args.DstDirPath
-		// 防止将下载好的文件删除
-		deletePolicy = DeleteNever
-	case "pikpak":
-		tempDir = args.DstDirPath
-		// 防止将下载好的文件删除
-		deletePolicy = DeleteNever
-	case "thunder":
-		tempDir = args.DstDirPath
-		// 防止将下载好的文件删除
-		deletePolicy = DeleteNever
+		if _, ok := storage.(*_115.Pan115); ok {
+			tempDir = args.DstDirPath
+		} else {
+			tempDir = filepath.Join(setting.GetStr(conf.Pan115TempDir), uid)
+		}
+	case "PikPak":
+		if _, ok := storage.(*pikpak.PikPak); ok {
+			tempDir = args.DstDirPath
+		} else {
+			tempDir = filepath.Join(setting.GetStr(conf.PikPakTempDir), uid)
+		}
+	case "Thunder":
+		if _, ok := storage.(*thunder.Thunder); ok {
+			tempDir = args.DstDirPath
+		} else {
+			tempDir = filepath.Join(setting.GetStr(conf.ThunderTempDir), uid)
+		}
 	}
 
 	taskCreator, _ := ctx.Value("user").(*model.User) // taskCreator is nil when convert failed