feat: add Safari bookmark and download extraction from plist (#567)

* feat: add Safari bookmark and download extraction from plist files
* test: add nested folder test for bookmark tree traversal
Part of #565

browser/safari/extract_bookmark.go

@@ -0,0 +1,84 @@
+package safari
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/moond4rk/plist"
+
+	"github.com/moond4rk/hackbrowserdata/types"
+)
+
+// safariBookmark mirrors the plist structure of Safari's Bookmarks.plist.
+type safariBookmark struct {
+	Type          string           `plist:"WebBookmarkType"`
+	Title         string           `plist:"Title"`
+	URLString     string           `plist:"URLString"`
+	URIDictionary uriDictionary    `plist:"URIDictionary"`
+	Children      []safariBookmark `plist:"Children"`
+}
+
+type uriDictionary struct {
+	Title string `plist:"title"`
+}
+
+const (
+	bookmarkTypeLeaf = "WebBookmarkTypeLeaf"
+	bookmarkTypeList = "WebBookmarkTypeList"
+)
+
+func extractBookmarks(path string) ([]types.BookmarkEntry, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, fmt.Errorf("open bookmarks: %w", err)
+	}
+	defer f.Close()
+
+	var root safariBookmark
+	if err := plist.NewDecoder(f).Decode(&root); err != nil {
+		return nil, fmt.Errorf("decode bookmarks: %w", err)
+	}
+
+	var bookmarks []types.BookmarkEntry
+	walkBookmarks(root.Children, "", &bookmarks)
+	return bookmarks, nil
+}
+
+// walkBookmarks recursively traverses the bookmark tree, collecting leaf entries.
+func walkBookmarks(nodes []safariBookmark, folder string, out *[]types.BookmarkEntry) {
+	for i, node := range nodes {
+		switch node.Type {
+		case bookmarkTypeLeaf:
+			title := node.URIDictionary.Title
+			if title == "" {
+				title = node.Title
+			}
+			if node.URLString == "" {
+				continue
+			}
+			*out = append(*out, types.BookmarkEntry{
+				ID:        int64(i),
+				Name:      title,
+				URL:       node.URLString,
+				Folder:    folder,
+				Type:      "bookmark",
+				CreatedAt: time.Time{},
+			})
+		case bookmarkTypeList:
+			name := node.Title
+			if name == "com.apple.ReadingList" {
+				name = "ReadingList"
+			}
+			walkBookmarks(node.Children, name, out)
+		}
+	}
+}
+
+func countBookmarks(path string) (int, error) {
+	bookmarks, err := extractBookmarks(path)
+	if err != nil {
+		return 0, err
+	}
+	return len(bookmarks), nil
+}