feat(api): implement task management API with handlers for creating, listing, retrieving, and canceling tasks

- Added Handlers struct and methods for task operations
- Implemented task progress tracking and storage
- Created server setup with middleware for logging and recovery
- Added support for Telegram file extraction and Telegraph image extraction
- Introduced webhook functionality for task status updates
- Defined request and response types for API interactions

api/tphpics.go

@@ -0,0 +1,80 @@
+package api
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"strings"
+
+	"github.com/charmbracelet/log"
+	"github.com/krau/SaveAny-Bot/common/utils/tphutil"
+	"github.com/krau/SaveAny-Bot/pkg/telegraph"
+)
+
+// ExtractTelegraphImages 从 Telegraph URL 提取图片
+func ExtractTelegraphImages(ctx context.Context, pageURL string) ([]string, string, error) {
+	logger := log.FromContext(ctx)
+
+	// 验证 URL 格式
+	if !isValidTelegraphURL(pageURL) {
+		return nil, "", fmt.Errorf("invalid telegraph URL format: %s", pageURL)
+	}
+
+	// 解析 URL 获取页面路径
+	pagepath, err := parseTelegraphPath(pageURL)
+	if err != nil {
+		return nil, "", err
+	}
+
+	logger.Debugf("Fetching telegraph page: %s", pagepath)
+
+	client := telegraph.NewClient()
+	page, err := client.GetPage(ctx, pagepath)
+	if err != nil {
+		return nil, "", fmt.Errorf("failed to get telegraph page: %w", err)
+	}
+
+	var imgs []string
+	for _, elem := range page.Content {
+		imgs = append(imgs, tphutil.GetNodeImages(elem)...)
+	}
+
+	if len(imgs) == 0 {
+		return nil, "", fmt.Errorf("no images found in telegraph page")
+	}
+
+	return imgs, pagepath, nil
+}
+
+// parseTelegraphPath 解析 Telegraph URL 获取页面路径
+func parseTelegraphPath(pageURL string) (string, error) {
+	u, err := url.Parse(pageURL)
+	if err != nil {
+		return "", fmt.Errorf("invalid telegraph URL: %w", err)
+	}
+
+	if !strings.HasSuffix(u.Host, "telegra.ph") && !strings.HasSuffix(u.Host, "telegraph.co") {
+		return "", fmt.Errorf("invalid telegraph URL host: %s", u.Host)
+	}
+
+	paths := strings.Split(strings.TrimPrefix(u.Path, "/"), "/")
+	if len(paths) == 0 || paths[0] == "" {
+		return "", fmt.Errorf("invalid telegraph URL path: %s", u.Path)
+	}
+
+	pagepath := paths[len(paths)-1]
+	pagepath, err = url.PathUnescape(pagepath)
+	if err != nil {
+		return "", fmt.Errorf("failed to unescape telegraph path: %w", err)
+	}
+
+	return strings.TrimSpace(pagepath), nil
+}
+
+// isValidTelegraphURL 检查是否是有效的 Telegraph URL
+func isValidTelegraphURL(url string) bool {
+	return strings.HasPrefix(url, "https://telegra.ph/") ||
+		strings.HasPrefix(url, "http://telegra.ph/") ||
+		strings.HasPrefix(url, "https://telegraph.co/") ||
+		strings.HasPrefix(url, "http://telegraph.co/")
+}