sending only needed request

(implemented is_admin from 1/2)

res/forum/script.js

@@ -53,20 +53,37 @@ function inject_info(id, username, postfix)
     });
 }
 
-function update_user(old_username, username, nickname, admin, sex, bio, refresh)
+async function update_user(old_username, username, nickname, admin, sex, bio, refresh)
 {
+    let am_i_admin = await is_admin();
+
     $.ajax
     ({
         url: "./res/forum/api/update_user.php" +
         "?old_username=" + old_username +
-        "&username=" + username +
         "&nickname=" + nickname +
-        "&admin=" + admin +
         "&sex=" + sex +
-        "&bio=" + bio,
+        "&bio=" + bio +
+        ((am_i_admin) ? "&username=" + username +
+        "&admin=" + admin : ""),
         success: function(result)
         {
             show(refresh);
         }
     });
+}
+
+function is_admin()
+{
+    return new Promise(function(resolve)
+    {
+        $.ajax
+        ({
+            url: "./res/forum/api/is_admin.php",
+            success: function(result)
+            {
+                resolve(result.admin);
+            }
+        })
+    });
 }

res/forum/user/user.html

@@ -20,7 +20,7 @@
             url: "./res/forum/api/get_username.php",
             success: function(result)
             {
-                update_user(result.username, document.getElementById("username").value, document.getElementById("nickname").value, document.getElementById("admin").value, document.getElementById("sex").value,document.getElementById("bio").value, "user");
+                update_user(result.username, null, document.getElementById("nickname").value, null, document.getElementById("sex").value,document.getElementById("bio").value, "user");
             }
         })
     }