Ajoute la gestion des groupes

shared/templates/wiki/base.html

@@ -25,20 +25,27 @@
         {% trans "Paramètres de compte" %}
       </a>
       <div class="dropdown-menu">
-                <a class="dropdown-item" href="{% url "account_email" %}">
+        <a class="dropdown-item" href="{% url 'account_email' %}">
           <i class="fa fa-envelope"></i>
           {% trans "Email" %}
         </a>
-                <a class="dropdown-item" href="{% url "account_change_password" %}">
+        <a class="dropdown-item" href="{% url 'account_change_password' %}">
           <i class="fa fa-lock"></i>
           {% trans "Mot de passe" %}
         </a>
-                <a class="dropdown-item" href="{% url "socialaccount_connections" %}" title="Clipper…">
+        <a class="dropdown-item" href="{% url 'socialaccount_connections' %}" title="Clipper…">
-                    <i class="fa fa-sign-in"></i>
+          <i class="fa fa-sign-in-alt"></i>
           {% trans "Connexions par tiers" %}
         </a>
+        {% if request.user.is_staff or request.user.managed_groups.exists %}
         <div class="dropdown-divider"></div>
-                <a class="dropdown-item" href="{% url "account_logout" %}">
+        <a class="dropdown-item" href="{% url 'wiki_groups:managed-groups' %}">
+          <i class="fa fa-cog"></i>
+          {% trans "Liste des groupes gérés" %}
+        </a>
+        {% endif %}
+        <div class="dropdown-divider"></div>
+        <a class="dropdown-item" href="{% url 'account_logout' %}">
           <i class="fa fa-power-off"></i>
           {% trans "Déconnexion" %}
         </a>
@@ -46,7 +53,7 @@
     </li>
     {% else %}
     <li class="nav-item">
-            <a class="nav-link" href="{% url "account_signup" %}">{% trans "Sign Up" %}</a>
+      <a class="nav-link" href="{% url 'account_signup' %}">{% trans "Sign Up" %}</a>
     </li>
     {% endif %}
   </ul>

wiki_groups/forms.py

@@ -0,0 +1,52 @@
+from django import forms
+from django.contrib.auth import get_user_model
+from django.contrib.auth.models import Group
+
+from wiki_groups.models import WikiGroup
+
+User = get_user_model()
+
+
+class SelectUserForm(forms.Form):
+    user = forms.CharField(max_length=150)
+
+    def clean_user(self):
+        user = User.objects.filter(username=self.cleaned_data["user"]).first()
+
+        if user is None:
+            self.add_error(
+                "user", "Aucune utilisatrice ou utilisateur avec ce login n'existe."
+            )
+
+        return user
+
+
+class SelectGroupForm(forms.Form):
+    group = forms.CharField(max_length=150)
+
+    def clean_group(self):
+        group = WikiGroup.objects.filter(
+            django_group__name=self.cleaned_data["group"]
+        ).first()
+
+        if group is None:
+            self.add_error("group", "Aucun groupe avec ce nom n'existe.")
+
+        return group
+
+
+class CreateGroupForm(forms.Form):
+    group = forms.CharField(max_length=150)
+
+    def clean_group(self):
+        name = self.cleaned_data["group"]
+
+        django_group, created = Group.objects.get_or_create(name=name)
+
+        if hasattr(django_group, "wikigroup"):
+            self.add_error("group", "Un groupe avec ce nom existe déjà.")
+            return None
+
+        group = WikiGroup.objects.create(django_group=django_group)
+
+        return group

wiki_groups/migrations/0002_wikigroup_managers.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.19 on 2021-07-23 09:01
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('wiki_groups', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='wikigroup',
+            name='managers',
+            field=models.ManyToManyField(blank=True, related_name='managed_groups', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

wiki_groups/models.py

@@ -1,12 +1,14 @@
-from django.db import models
-from django.contrib.auth.models import Group as DjangoGroup
 from django.contrib.auth import get_user_model
-from django.db.models.signals import post_save, m2m_changed
+from django.contrib.auth.models import Group as DjangoGroup
+from django.db import models
+from django.db.models.signals import m2m_changed, post_save
 from django.dispatch import receiver
 
+User = get_user_model()
+
 
 class WikiGroup(models.Model):
-    """ A structured user group, used to grant permissions on sub-wikis
+    """A structured user group, used to grant permissions on sub-wikis
 
     This model contains a structured group of users, in the sense that a group contains
     both users and other groups, allowing a DAG group structure.
@@ -20,8 +22,8 @@ class WikiGroup(models.Model):
     """
 
     class CyclicStructureException(Exception):
-        """ Exception raised when a new edge introduces a cycle in the groups'
+        """Exception raised when a new edge introduces a cycle in the groups'
-        structure """
+        structure"""
 
         def __init__(self, from_group, to_group):
             self.from_group = from_group
@@ -40,22 +42,48 @@ class WikiGroup(models.Model):
         related_name="included_in_groups",
         blank=True,
     )
-    users = models.ManyToManyField(get_user_model(), blank=True)
+    users = models.ManyToManyField(User, blank=True)
+    managers = models.ManyToManyField(User, related_name="managed_groups", blank=True)
 
     def __str__(self):
         return str(self.django_group)
 
     def get_all_users(self):
-        """ Get the queryset of all the users in this group, including recursively
+        """Get the queryset of all the users in this group, including recursively
-        included users """
+        included users"""
         users_set = self.users.all()
         for subgroup in self.includes_groups.all():
             users_set = users_set.union(subgroup.get_all_users())
         return users_set
 
+    def is_manager(self, user):
+        """Checks wether the user is a manager of this group or any subgroup"""
+
+        # Base case: the user is an explicit manager
+        if user in self.managers.all():
+            return True
+
+        for subgroup in self.includes_groups.all():
+            # If the user is a manager of a subgroup
+            if subgroup.is_manager(user):
+                return True
+
+        return False
+
+    def get_all_groups(self):
+        """Returns the set of metagroups i.e. self plus the list of groups including
+        this group recursively"""
+
+        groups = {self}
+
+        for metagroup in self.included_in_groups.all():
+            groups |= metagroup.get_all_groups()
+
+        return groups
+
     def propagate_update(self, already_notified=None):
-        """ Commits itself to the Django group, and calls this method on every group in
+        """Commits itself to the Django group, and calls this method on every group in
-        `included_in_groups` """
+        `included_in_groups`"""
 
         # Check that we did not already propagate the update signal to this group
         if already_notified is None:
@@ -69,20 +97,20 @@ class WikiGroup(models.Model):
             metagroup.propagate_update(already_notified=already_notified)
 
     def commit_to_django_group(self):
-        """ Writes this model's data to the related Django group """
+        """Writes this model's data to the related Django group"""
 
         self.django_group.user_set.set(self.get_all_users())
 
     def group_in_cycle(self, with_children):
-        """ Checks whether this group would be in a group cycle if it had
+        """Checks whether this group would be in a group cycle if it had
         `with_children` as child nodes. This assumes that the graph currently stored is
         acyclic.
 
         Returns `None` if no cycle is found, else retuns a child from `with_children`
-        causing the cycle to appear. """
+        causing the cycle to appear."""
 
         def do_dfs(cur_node, visited_nodes):
-            """ DFS to check whether we find `self` again """
+            """DFS to check whether we find `self` again"""
             if cur_node.pk in visited_nodes:
                 return False
             if cur_node.pk == self.pk:
@@ -103,7 +131,7 @@ class WikiGroup(models.Model):
 
 @receiver(post_save, sender=WikiGroup, dispatch_uid="on_wiki_group_changed")
 def on_wiki_group_changed(sender, instance, **kwargs):
-    """ Commit the related WikiGroups to Django Group upon model change """
+    """Commit the related WikiGroups to Django Group upon model change"""
     instance.propagate_update()
 
 
@@ -113,8 +141,8 @@ def on_wiki_group_changed(sender, instance, **kwargs):
     dispatch_uid="on_wiki_group_includes_changed",
 )
 def on_wiki_group_includes_changed(sender, instance, action, **kwargs):
-    """ Commit the related WikiGroups to Django Group upon change of the set of
+    """Commit the related WikiGroups to Django Group upon change of the set of
-    included other groups """
+    included other groups"""
     if action in ["post_add", "post_remove", "post_clear"]:
         instance.propagate_update()
 
@@ -125,7 +153,7 @@ def on_wiki_group_includes_changed(sender, instance, action, **kwargs):
     dispatch_uid="on_wiki_group_users_changed",
 )
 def on_wiki_group_users_changed(sender, instance, action, **kwargs):
-    """ Commit the related WikiGroups to Django Group upon change of included users """
+    """Commit the related WikiGroups to Django Group upon change of included users"""
     if action in ["post_add", "post_remove", "post_clear"]:
         instance.propagate_update()
 
@@ -136,7 +164,7 @@ def on_wiki_group_users_changed(sender, instance, action, **kwargs):
     dispatch_uid="on_wiki_group_includes_check_acyclic",
 )
 def on_wiki_group_includes_check_acyclic(sender, instance, action, pk_set, **kwargs):
-    """ Checks the acyclicity of the groups' graph before committing new edges.
+    """Checks the acyclicity of the groups' graph before committing new edges.
 
     PLEASE NOTE that this check is only a fallback, and that forms should validate
     the acyclicity before committing anything.

wiki_groups/templates/wiki_groups/admin.html

@@ -0,0 +1,210 @@
+{% extends "wiki/base.html" %}
+{% load sekizai_tags %}
+
+{% block wiki_site_title %}Groupes administrés - WikiENS{% endblock %}
+
+{% block wiki_contents %}
+<h2>Gestion du groupe « {{ wikigroup }} »</h2>
+<hr>
+
+<div class="container">
+  <div class="row">
+
+    <div class="col">
+      <h4>Liste des membres</h4>
+      <br>
+
+      <div class="list-group">
+        <div class="list-group-item">
+          <form action="{% url 'wiki_groups:add-user' wikigroup.pk %}" method="post">
+            {% csrf_token %}
+            <div class="input-group">
+              <input type="text" class="form-control {% if errors.user %}is-invalid{% endif %}" name="user" value="{{ errors.user.value }}" placeholder="Ajouter un membre">
+              <div class="input-group-append">
+                <button type="submit" class="btn btn-primary rounded-right">Enregistrer</button>
+              </div>
+              {% if errors.user %}
+              {% for msg in errors.user.msg %}
+              <div class="invalid-feedback">{{ msg }}</div>
+              {% endfor %}
+              {% endif %}
+            </div>
+            <small class="form-text text-muted">Entrer le login (clipper) de la personne à ajouter</small>
+          </form>
+        </div>
+
+        {% for user in wikigroup.users.all %}
+        <div class="list-group-item pb-2">
+          <span class="font-italic">{{ user }}</span>
+          <button type="button" class="btn btn-danger btn-sm float-right" data-toggle="modal" data-target="#modal-confirm" data-href="{% url 'wiki_groups:remove-user' wikigroup.pk user.pk %}" data-name="{{ user }}" data-kind="membre">Enlever</a>
+        </div>
+        {% endfor %}
+      </div>
+    </div>
+
+    <div class="col">
+      <h4>Liste des groupes inclus</h4>
+      <br>
+
+      <div class="list-group">
+        <div class="list-group-item">
+          <form action="{% url 'wiki_groups:add-group' wikigroup.pk %}" method="post">
+            {% csrf_token %}
+            <div class="input-group">
+              <input type="text" class="form-control {% if errors.group_add %}is-invalid{% endif %}" name="group" value="{{ errors.group_add.value }}" placeholder="Ajouter un groupe">
+              <div class="input-group-append">
+                <button type="submit" class="btn btn-primary rounded-right">Enregistrer</button>
+              </div>
+              {% if errors.group_add %}
+              {% for msg in errors.group_add.msg %}
+              <div class="invalid-feedback">{{ msg }}</div>
+              {% endfor %}
+              {% endif %}
+            </div>
+            <small class="form-text text-muted">Entrer le nom du groupe à ajouter</small>
+          </form>
+        </div>
+
+        {% for group in wikigroup.includes_groups.all %}
+        <div class="list-group-item pb-2">
+          <span class="font-italic">{{ group }}</span>
+          <button type="button" class="btn btn-danger btn-sm float-right" data-toggle="modal" data-target="#modal-confirm" data-href="{% url 'wiki_groups:remove-group' wikigroup.pk group.pk %}" data-name="{{ group }}" data-kind="groupe">Enlever</a>
+        </div>
+        {% endfor %}
+
+        <div class="list-group-item">
+          <form action="{% url 'wiki_groups:create-group' wikigroup.pk %}" method="post">
+            {% csrf_token %}
+            <div class="input-group">
+              <input type="text" class="form-control {% if errors.group_create %}is-invalid{% endif %}" name="group" value="{{ errors.group_create.value }}" placeholder="Créer et ajouter un groupe">
+              <div class="input-group-append">
+                <button type="submit" class="btn btn-primary rounded-right">Enregistrer</button>
+              </div>
+              {% if errors.group_create %}
+              {% for msg in errors.group_create.msg %}
+              <div class="invalid-feedback">{{ msg }}</div>
+              {% endfor %}
+              {% endif %}
+            </div>
+            <small class="form-text text-muted">Entrer le nom du groupe à créer</small>
+          </form>
+        </div>
+      </div>
+    </div>
+  </div>
+  <hr>
+
+  <div class="row">
+    <div class="col-6">
+      <h4>Liste des gestionnaires</h4>
+      <br>
+
+      <div class="list-group">
+        <div class="list-group-item">
+          <form action="{% url 'wiki_groups:add-manager' wikigroup.pk %}" method="post">
+            {% csrf_token %}
+            <div class="input-group">
+              <input type="text" class="form-control {% if errors.manager %}is-invalid{% endif %}" name="user" value="{{ errors.manager.value }}" placeholder="Ajouter un·e gestionnaire">
+              <div class="input-group-append">
+                <button type="submit" class="btn btn-primary rounded-right">Enregistrer</button>
+              </div>
+              {% if errors.manager %}
+              {% for msg in errors.manager.msg %}
+              <div class="invalid-feedback">{{ msg }}</div>
+              {% endfor %}
+              {% endif %}
+            </div>
+            <small class="form-text text-muted">Entrer le login (clipper) de la personne à ajouter</small>
+          </form>
+        </div>
+
+        {% for user in wikigroup.managers.all %}
+        <div class="list-group-item pb-2">
+          <span class="font-italic">{{ user }}</span>
+          <button type="button" class="btn btn-danger btn-sm float-right" data-toggle="modal" data-target="#modal-confirm" data-href="{% url 'wiki_groups:remove-manager' wikigroup.pk user.pk %}" data-name="{{ user }}" data-kind="gestionnaire">Enlever</a>
+        </div>
+        {% endfor %}
+      </div>
+    </div>
+
+    {% if request.user.is_staff %}
+    <div class="col">
+      <h4>Supprimer ce groupe</h4>
+      <br>
+
+      <div class="jumbotron">
+        <p class="text-danger">Attention, cette action est irréversible.</p>
+        <button type="button" class="btn btn-danger" data-toggle="modal" data-target="#modal-delete">Supprimer</a>
+      </div>
+    </div>
+
+    <div class="modal fade" id="modal-delete">
+      <div class="modal-dialog">
+        <div class="modal-content">
+          <div class="modal-header">
+            <h5 class="modal-title">Supprimer le groupe {{ wikigroup }} ?</h5>
+            <button type="button" class="close" data-dismiss="modal" aria-label="Close">
+              <span aria-hidden="true">&times;</span>
+            </button>
+          </div>
+
+          <div class="modal-body">
+            La suppression du groupe « {{ wikigroup }} » est irréversible et tous ses membres seront enlevés des groupes suivants :
+            <ul>
+              {% for g in wikigroup.get_all_groups %}
+              <li>{{ g }}</li>
+              {% endfor %}
+            </ul>
+          </div>
+
+          <div class="modal-footer">
+            <button type="button" class="btn btn-secondary" data-dismiss="modal">Annuler</button>
+            <a class="btn btn-danger" href="{% url 'wiki_groups:delete-group' wikigroup.pk %}">Supprimer</a>
+          </div>
+        </div>
+      </div>
+    </div>
+    {% endif %}
+  </div>
+</div>
+
+{# Confirmation modal #}
+<div class="modal fade" id="modal-confirm">
+  <div class="modal-dialog" role="document">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h5 class="modal-title"></h5>
+        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
+          <span aria-hidden="true">&times;</span>
+        </button>
+      </div>
+
+      <div class="modal-body">
+      </div>
+
+      <div class="modal-footer">
+        <button type="button" class="btn btn-secondary" data-dismiss="modal">Annuler</button>
+        <a class="btn btn-danger">Enlever</a>
+      </div>
+    </div>
+  </div>
+</div>
+
+{% addtoblock "js" %}
+<script>
+  $('#modal-confirm').on('show.bs.modal', function(event) {
+    var button = $(event.relatedTarget);
+    var name = button.data('name');
+    var url = button.data('href');
+    var kind = button.data('kind');
+
+    var modal = $(this);
+    modal.find('.modal-title').text(`Enlever un ${kind}`);
+    modal.find('.modal-body').html(`Enlever <span class="font-weight-bold font-italic">${name}</span> en tant que ${kind} du groupe {{ wikigroup }} ?`);
+    modal.find('.modal-footer a').prop('href', url);
+  });
+
+</script>
+{% endaddtoblock %}
+
+{% endblock %}

wiki_groups/templates/wiki_groups/managed.html

@@ -0,0 +1,18 @@
+{% extends "wiki/base.html" %}
+
+{% block wiki_site_title %}Groupes administrés - WikiENS{% endblock %}
+
+{% block wiki_contents %}
+<h2>Liste des groupes administrés</h2>
+<hr>
+
+{% if wikigroups %}
+<div class="list-group">
+  {% for group in wikigroups %}
+  <a class="list-group-item list-group-item-action" href="{% url 'wiki_groups:admin-group' group.pk %}">{{ group }}</a>
+  {% endfor %}
+</div>
+{% endif %}
+
+
+{% endblock %}

wiki_groups/urls.py

@@ -1,9 +1,31 @@
 from django.urls import path
-from wiki_groups import views
 
+from wiki_groups import views
 
 app_name = "wiki_groups"
 urlpatterns = [
     path("dot_graph", views.dot_graph, name="dot_graph"),
     path("graph", views.graph, name="graph"),
+    path("managed", views.ManagedGroupsView.as_view(), name="managed-groups"),
+    path("<int:pk>", views.WikiGroupView.as_view(), name="admin-group"),
+    path(
+        "<int:pk>/rm-user/<int:user_pk>",
+        views.RemoveUserView.as_view(),
+        name="remove-user",
+    ),
+    path(
+        "<int:pk>/rm-manager/<int:user_pk>",
+        views.RemoveManagerView.as_view(),
+        name="remove-manager",
+    ),
+    path(
+        "<int:pk>/rm-group/<int:group_pk>",
+        views.RemoveGroupView.as_view(),
+        name="remove-group",
+    ),
+    path("<int:pk>/add-user", views.AddUserView.as_view(), name="add-user"),
+    path("<int:pk>/add-manager", views.AddManagerView.as_view(), name="add-manager"),
+    path("<int:pk>/add-group", views.AddGroupView.as_view(), name="add-group"),
+    path("<int:pk>/create-group", views.CreateGroupView.as_view(), name="create-group"),
+    path("<int:pk>/delete", views.DeleteGroupView.as_view(), name="delete-group"),
 ]

wiki_groups/views.py

@@ -1,8 +1,16 @@
-from django.http import HttpResponse
+from django.contrib.auth import get_user_model
-from django.views.generic import TemplateView
+from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin
+from django.http import HttpResponse, HttpResponseRedirect
+from django.urls import reverse, reverse_lazy
+from django.views.generic import DetailView, ListView, RedirectView, TemplateView
+from django.views.generic.detail import SingleObjectMixin
+from django.views.generic.edit import BaseFormView
 
+from wiki_groups.forms import CreateGroupForm, SelectGroupForm, SelectUserForm
 from wiki_groups.models import WikiGroup
 
+User = get_user_model()
+
 
 def dot_graph(request):
     response = HttpResponse(content_type="text/vnd.graphviz")
@@ -23,3 +31,182 @@ def dot_graph(request):
 
 
 graph = TemplateView.as_view(template_name="wiki_groups/graph.html")
+
+
+class WikiGroupMixin(SingleObjectMixin, UserPassesTestMixin):
+    """Restricts the view to a manager of the wikigroup"""
+
+    model = WikiGroup
+
+    def get_queryset(self):
+        return super().get_queryset().select_related("django_group")
+
+    def test_func(self):
+        self.object = self.get_object()
+        return self.request.user.is_staff or self.object.is_manager(self.request.user)
+
+
+class StaffMixin(UserPassesTestMixin):
+    """Restricts the view to a staff member"""
+
+    def test_func(self):
+        return self.request.user.is_staff
+
+
+class ManagedGroupsView(LoginRequiredMixin, ListView):
+    model = WikiGroup
+    template_name = "wiki_groups/managed.html"
+
+    def get_queryset(self):
+        if self.request.user.is_staff:
+            return WikiGroup.objects.select_related("django_group")
+        return self.request.user.managed_groups.select_related("django_group")
+
+    def get_context_data(self, **kwargs):
+        ctx = super().get_context_data(**kwargs)
+        ctx["wikigroups"] = set()
+
+        for group in ctx["wikigroup_list"]:
+            ctx["wikigroups"] |= group.get_all_groups()
+
+        return ctx
+
+
+class WikiGroupView(WikiGroupMixin, DetailView):
+    template_name = "wiki_groups/admin.html"
+
+    def get_context_data(self, **kwargs):
+        kwargs.update({"errors": self.request.session.pop("wiki_form_errors", None)})
+        return super().get_context_data(**kwargs)
+
+
+class RemoveUserView(WikiGroupMixin, RedirectView):
+    def get_redirect_url(self, *args, **kwargs):
+        return reverse("wiki_groups:admin-group", args=[kwargs["pk"]])
+
+    def get(self, request, *args, **kwargs):
+        user = User.objects.get(pk=kwargs["user_pk"])
+        self.object.users.remove(user)
+
+        return super().get(request, *args, **kwargs)
+
+
+class RemoveManagerView(WikiGroupMixin, RedirectView):
+    def get_redirect_url(self, *args, **kwargs):
+        return reverse("wiki_groups:admin-group", args=[kwargs["pk"]])
+
+    def get(self, request, *args, **kwargs):
+        user = User.objects.get(pk=kwargs["user_pk"])
+        self.object.managers.remove(user)
+
+        return super().get(request, *args, **kwargs)
+
+
+class RemoveGroupView(WikiGroupMixin, RedirectView):
+    def get_redirect_url(self, *args, **kwargs):
+        return reverse("wiki_groups:admin-group", args=[kwargs["pk"]])
+
+    def get(self, request, *args, **kwargs):
+        group = WikiGroup.objects.get(pk=kwargs["group_pk"])
+        self.object.includes_groups.remove(group)
+
+        return super().get(request, *args, **kwargs)
+
+
+class AddUserView(WikiGroupMixin, BaseFormView):
+    form_class = SelectUserForm
+
+    def get_success_url(self):
+        return reverse("wiki_groups:admin-group", args=[self.object.pk])
+
+    def form_valid(self, form):
+        self.object.users.add(form.cleaned_data["user"])
+
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        self.request.session["wiki_form_errors"] = {
+            "user": {"value": form["user"].value(), "msg": form.errors["user"]}
+        }
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class AddManagerView(WikiGroupMixin, BaseFormView):
+    form_class = SelectUserForm
+
+    def get_success_url(self):
+        return reverse("wiki_groups:admin-group", args=[self.object.pk])
+
+    def form_valid(self, form):
+        self.object.managers.add(form.cleaned_data["user"])
+
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        self.request.session["wiki_form_errors"] = {
+            "manager": {"value": form["user"].value(), "msg": form.errors["user"]}
+        }
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class AddGroupView(WikiGroupMixin, BaseFormView):
+    form_class = SelectGroupForm
+
+    def get_success_url(self):
+        return reverse("wiki_groups:admin-group", args=[self.object.pk])
+
+    def form_valid(self, form):
+        subgroup = form.cleaned_data["group"]
+        group = self.object
+
+        if group.group_in_cycle(list(group.includes_groups.all()) + [subgroup]):
+            form.add_error("group", "Ajout impossible sous peine de créer un cycle")
+            return self.form_invalid(form)
+
+        group.includes_groups.add(subgroup)
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        self.request.session["wiki_form_errors"] = {
+            "group_add": {"value": form["group"].value(), "msg": form.errors["group"]}
+        }
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class CreateGroupView(WikiGroupMixin, BaseFormView):
+    form_class = CreateGroupForm
+
+    def get_success_url(self):
+        return reverse("wiki_groups:admin-group", args=[self.object.pk])
+
+    def form_valid(self, form):
+        new_group = form.cleaned_data["group"]
+
+        self.object.includes_groups.add(new_group)
+        new_group.managers.add(self.request.user)
+
+        return super().form_valid(form)
+
+    def form_invalid(self, form):
+        self.request.session["wiki_form_errors"] = {
+            "group_create": {
+                "value": form["group"].value(),
+                "msg": form.errors["group"],
+            }
+        }
+        return HttpResponseRedirect(self.get_success_url())
+
+
+class DeleteGroupView(SingleObjectMixin, StaffMixin, RedirectView):
+    model = WikiGroup
+    url = reverse_lazy("wiki_groups:managed-groups")
+
+    def get(self, request, *args, **kwargs):
+        group = self.get_object()
+        # On enlève les membres pour répercuter les changements
+        group.users.clear()
+
+        # On utilise la propagation de la suppression django_group -> wiki_group
+        group.django_group.delete()
+
+        return super().get(request, *args, **kwargs)