core: add contest invitation code

packages/ui-default/templates/contest_edit.html

@@ -7,7 +7,7 @@
         <form method="post">
           <div class="row">
             {{ form.form_select({
-                 columns:4,
+                 columns:3,
                  label:'Rule',
                  name:'rule',
                  options:rules,
@@ -23,8 +23,16 @@
                  autofocus:true,
                  row:false
                }) }}
+            {{ form.form_text({
+                 columns:3,
+                 label:'Invitation code',
+                 name:'code',
+                 placeholder:_('(leave blank if none)'),
+                 value:tdoc.code|default(''),
+                 row:false
+               }) }}
             {{ form.form_checkbox({
-                columns:4,
+                columns:2,
                 label:'Rated',
                 name:'rated',
                 placeholder:_('Is rated'),

packages/ui-default/templates/partials/contest_sidebar.html

@@ -41,13 +41,13 @@
     {% if not attended and not model.contest.isDone(tdoc) %}
       <li class="menu__item">
     {% if handler.user.hasPerm(perm.PERM_ATTEND_CONTEST) and handler.user.hasPriv(PRIV.PRIV_USER_PROFILE) %}
-        <form action="{{ url('contest_detail', tid=tdoc.docId) }}" method="POST">
-          <input type="hidden" name="operation" value="attend">
-          <input type="hidden" name="csrfToken" value="{{ handler.csrfToken }}">
-          <button class="menu__link" type="submit">
-            <span class="icon icon-add"></span> {{ _('Attend Contest') }}
-          </button>
-        </form>
+      <form action="{{ url('contest_detail', tid=tdoc.docId) }}" method="POST">
+        <input type="hidden" name="operation" value="attend">
+        <input type="hidden" name="csrfToken" value="{{ handler.csrfToken }}">
+        <button class="menu__link" {% if tdoc._code %}data-contest-code{% endif %} type="submit">
+          <span class="icon icon-add"></span> {{ _('Attend Contest') }}
+        </button>
+      </form>
     {% elif not handler.user.hasPriv(PRIV.PRIV_USER_PROFILE) %}
         <a class="menu__link" href="javascript:showSignInDialog()">
           <span class="icon icon-add"></span> {{ _('Login to Attend Contest') }}