Add zip_path to API document, add path property

Author: Leeingnyo

src/library/entry.cr

@@ -49,6 +49,7 @@ abstract class Entry
           json.field "err_msg", err_msg
         end
         json.field "zip_path", path # for API backward compatability
+        json.field "path", path
         json.field "title_id", @book.id
         json.field "title_title", @book.title
         json.field "sort_title", sort_title

src/routes/api.cr

@@ -40,7 +40,7 @@ struct APIRouter
     Koa.schema "entry", {
       "pages" => Int32,
       "mtime" => Int64,
-    }.merge(s %w(path title size id title_id display_name cover_url)),
+    }.merge(s %w(zip_path path title size id title_id display_name cover_url)),
       desc: "An entry in a book"
 
     Koa.schema "title", {