feat: add direct links download functionality

- Implemented a new task type for handling direct links downloads.
- Added command handler for downloading multiple links via /dl command.
- Introduced progress tracking for direct link downloads.
- Enhanced filename parsing to support various encoding scenarios.
- Updated enums to include direct links as a task type.
- Refactored existing task structures to accommodate new functionality.
- Improved error handling and logging throughout the download process.

client/bot/handlers/dl.go

@@ -0,0 +1,49 @@
+package handlers
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+
+	"github.com/celestix/gotgproto/ext"
+	"github.com/charmbracelet/log"
+	"github.com/duke-git/lancet/v2/slice"
+	"github.com/krau/SaveAny-Bot/client/bot/handlers/utils/msgelem"
+	"github.com/krau/SaveAny-Bot/pkg/enums/tasktype"
+	"github.com/krau/SaveAny-Bot/pkg/tcbdata"
+	"github.com/krau/SaveAny-Bot/storage"
+)
+
+func handleDlCmd(ctx *ext.Context, update *ext.Update) error {
+	logger := log.FromContext(ctx)
+	args := strings.Split(update.EffectiveMessage.Text, " ")
+	if len(args) < 2 {
+		ctx.Reply(update, ext.ReplyTextString("用法: /dl <链接1> <链接2> ..."), nil)
+		return nil
+	}
+	links := args[1:]
+	for i, link := range links {
+		links[i] = strings.TrimSpace(link)
+		u, err := url.Parse(link)
+		if err != nil || u.Scheme == "" || u.Host == "" {
+			logger.Warn("invaild link", link)
+			links[i] = ""
+		}
+	}
+	links = slice.Compact(links)
+	if len(links) == 0 {
+		ctx.Reply(update, ext.ReplyTextString("没有有效的链接可供下载"), nil)
+		return nil
+	}
+	markup, err := msgelem.BuildAddSelectStorageKeyboard(storage.GetUserStorages(ctx, update.GetUserChat().GetID()), tcbdata.Add{
+		TaskType:    tasktype.TaskTypeDirectlinks,
+		DirectLinks: links,
+	})
+	if err != nil {
+		return err
+	}
+	ctx.Reply(update, ext.ReplyTextString(fmt.Sprintf("共 %d 个文件, 请选择存储位置", len(links))), &ext.ReplyOpts{
+		Markup: markup,
+	})
+	return nil
+}