core: add custom group model with hierarchy , add tree admin

passbook/admin/templates/administration/groups/list.html

@@ -0,0 +1,83 @@
+{% extends "administration/base.html" %}
+
+{% load i18n %}
+{% load static %}
+{% load utils %}
+
+{% block head %}
+{{ block.super }}
+<link rel="stylesheet" href="{% static 'css/bootstrap-treeview.min.css'%}">
+{% endblock %}
+
+{% block scripts %}
+{{ block.super }}
+<script src="{% static 'js/bootstrap-treeview.min.js' %}"></script>
+<script>
+  var cleanupData = function (obj) {
+    return {
+      text: obj.name,
+      href: '?group=' + obj.uuid,
+      nodes: obj.children.map(cleanupData),
+    };
+  }
+ $(function() {
+   var apiUrl = "{% url 'passbook_admin:group-list' %}?format=json";
+   $.ajax({
+      url: apiUrl,
+    }).done(function(data) {
+      $('#treeview1').treeview({
+        collapseIcon: "fa fa-angle-down",
+        data: data.map(cleanupData),
+        expandIcon: "fa fa-angle-right",
+        nodeIcon: "fa pficon-users",
+        showBorder: true,
+        enableLinks: true,
+        onNodeSelected: function (event, node) {
+          window.location.href = node.href;
+        }
+      });
+    });
+  });
+</script>
+{% endblock %}
+
+{% block title %}
+{% title %}
+{% endblock %}
+
+{% block content %}
+<div class="col-md-3">
+  <div id="treeview1" class="treeview">
+  </div>
+</div>
+<div class="col-md-9">
+  <h1>{% trans "Invitations" %}</h1>
+  <a href="{% url 'passbook_admin:invitation-create' %}" class="btn btn-primary">
+    {% trans 'Create...' %}
+  </a>
+  <hr>
+  <table class="table table-striped table-bordered">
+    <thead>
+      <tr>
+        <th>{% trans 'Expiry' %}</th>
+        <th>{% trans 'Link' %}</th>
+        <th></th>
+      </tr>
+    </thead>
+    <tbody>
+      {% for invitation in object_list %}
+      <tr>
+        <td>{{ invitation.expires|default:"Never" }}</td>
+        <td>
+          <pre>{{ invitation.link }}</pre>
+        </td>
+        <td>
+          <a class="btn btn-default btn-sm" href="{% url 'passbook_admin:invitation-delete' pk=invitation.uuid %}?back={{ request.get_full_path }}">{%
+            trans 'Delete' %}</a>
+        </td>
+      </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+</div>
+{% endblock %}