Can update post content

lib/helpers/posts_helper.dart

@@ -56,6 +56,19 @@ class PostsHelper {
     }
   }
 
+  /// Update a post content
+  Future<bool> updateContent(int id, String newContent) async {
+    return (await APIRequest(
+      uri: "posts/update_content",
+      needLogin: true,
+      args: {
+        "postID": id.toString(),
+        "new_content": newContent,
+      },
+    ).exec())
+        .isOK;
+  }
+
   /// Delete a post
   Future<bool> delete(int id) async {
     return (await APIRequest(