Add 'Permissions' panel to UI

Add a panel to the UI of each detail screen of Service/Project/Farm object
to assign or remove permissions for users. User needs to have MANAGE permissions
to assign or remove permissions for users through this panel.

promgen/forms.py

@@ -6,7 +6,9 @@
 
 from dateutil import parser
 from django import forms
+from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
+from guardian.shortcuts import get_perms_for_model
 
 from promgen import errors, models, plugins, prometheus, validators
 
@@ -254,3 +256,40 @@ def clean(self):
         if not hosts:
             raise ValidationError("No valid hosts")
         self.cleaned_data["hosts"] = list(hosts)
+
+
+class UserPermissionForm(forms.Form):
+    permission = forms.ChoiceField(
+        required=True,
+        label="Permission",
+    )
+
+    username = forms.ChoiceField(
+        required=True,
+        label="Username",
+    )
+
+    def __init__(self, *args, **kwargs):
+        input_object = kwargs.pop("input_object", None)
+        super(UserPermissionForm, self).__init__(*args, **kwargs)
+        if input_object:
+            self.fields["permission"].choices = self.get_permission_choices(input_object)
+        self.fields["username"].choices = self.get_user_choices()
+
+    def get_permission_choices(self, input_object):
+        permissions = get_perms_for_model(input_object)
+        for permission in permissions:
+            yield (permission.codename, permission.name)
+
+    def get_user_choices(self):
+        for u in (
+            User.objects.filter(is_active=True, is_superuser=False)
+            .exclude(username="AnonymousUser")
+            .order_by("username")
+        ):
+            if u.first_name:
+                yield (u.username, f"{u.username} ({u.first_name} {u.last_name})")
+            elif u.email:
+                yield (u.username, f"{u.username} ({u.email})")
+            else:
+                yield (u.username, u.username)

promgen/templates/promgen/farm_detail.html

@@ -71,4 +71,9 @@ <h1>Farm: {{ farm.name }} ({{ farm.source }})
 
 </div>
 
+<div class="panel panel-default">
+  <div class="panel-heading">Permissions</div>
+  {% include "promgen/permission_block.html" with object=farm %}
+</div>
+
 {% endblock %}

promgen/templates/promgen/permission_block.html

@@ -0,0 +1,38 @@
+{% load i18n %}
+{% load promgen %}
+
+<table class="table table-bordered table-condensed{% if collapse %} collapse"
+       id="{{ collapse }}{% endif %}">
+    <tr>
+        <th>User</th>
+        <th>Email</th>
+        <th>
+            <div data-toggle="tooltip" data-placement="top" data-html="true">
+                Permission
+            </div>
+        </th>
+        <th>Actions</th>
+    </tr>
+    {% for user,perms in object|get_users_permissions %}
+    {% include 'promgen/permission_row.html' %}
+    {% endfor %}
+</table>
+
+
+<div class="panel-footer">
+    <form method="post" action="{% url 'permission-assign'%}"
+          onsubmit="return confirm('{% trans 'Assign permission for user?' %}')">
+        {% csrf_token %}
+        <input name="next" type="hidden" value="{{ request.get_full_path }}"/>
+        <input name="model" type="hidden" value="{{ object | klass }}"/>
+        <input name="id" type="hidden" value="{{object.id}}"/>
+        <table class="table">
+            {{ permission_form.as_table }}
+        </table>
+        <div>
+            <button class="btn btn-primary">
+                Assign
+            </button>
+        </div>
+    </form>
+</div>

promgen/templates/promgen/permission_row.html

@@ -0,0 +1,26 @@
+{% load i18n %}
+{% load promgen %}
+<tr>
+    <td class="col-xs-3" v-pre>{{ user.username }}</td>
+    <td class="col-xs-3" v-pre>{{ user.email }}</td>
+    <td class="col-xs-3" style="word-break: break-all;" v-pre>
+        {% for perm in perms %}
+        <span class="label label-info">{{ perm|upper }}</span>
+        {% endfor %}
+    </td>
+    <td class="col-xs-3" style="word-break: break-all;" v-pre>
+        <form method="post" action="{% url 'permission-delete' %}"
+              onsubmit="return confirm('{% trans 'Delete all permissions for user?' %}')">
+            {% csrf_token %}
+            <input type="hidden" name="username" value="{{ user.username }}">
+            <input name="next" type="hidden" value="{{ request.get_full_path }}"/>
+            <input name="model" type="hidden" value="{{ object | klass }}"/>
+            <input name="id" type="hidden" value="{{object.id}}"/>
+            <button type="submit" class="btn btn-danger btn-xs">Delete</button>
+        </form>
+    </td>
+</tr>
+
+
+
+

promgen/templates/promgen/project_detail.html

@@ -66,5 +66,6 @@ <h1>
 </div>
 
 {% include "promgen/project_detail_rules.html" %}
+{% include "promgen/project_detail_permissions.html" %}
 
 {% endblock %}

promgen/templates/promgen/project_detail_permissions.html

@@ -0,0 +1,6 @@
+{% load i18n %}
+
+<div class="panel panel-primary">
+    <div class="panel-heading">Permissions</div>
+    {% include "promgen/permission_block.html" with object=project %}
+</div>

promgen/templates/promgen/service_detail.html

@@ -63,6 +63,7 @@ <h1>Service: {{ service.name }}</h1>
   <li role="presentation" class="active"><a href="#projects" data-toggle="tab">Projects</a></li>
   <li role="presentation"><a href="#rules" data-toggle="tab">Rules</a></li>
   <li role="presentation"><a href="#notifiers" data-toggle="tab">Notifiers</a></li>
+  <li role="presentation"><a href="#permissions" data-toggle="tab">Permissions</a></li>
 </ul>
 
 <div class="well">
@@ -89,6 +90,13 @@ <h1>Service: {{ service.name }}</h1>
       {% include "promgen/service_block_panel_notifiers.inc.html" %}
 
     </div>
+
+    <div role="tabpanel" class="tab-pane" id="permissions">
+      <div class="panel panel-default">
+        {% include "promgen/permission_block.html" with object=service %}
+      </div>
+    </div>
+
   </div>
 
 </div> 

promgen/templatetags/promgen.py

@@ -14,6 +14,7 @@
 from django.utils.html import format_html
 from django.utils.safestring import mark_safe
 from django.utils.translation import gettext as _
+from guardian.shortcuts import get_users_with_perms
 
 register = template.Library()
 
@@ -214,3 +215,10 @@ def urlqs(view, **kwargs):
     This only works for views that do not need additional parameters
     """
     return reverse(view) + "?" + urlencode(kwargs)
+
+
+@register.filter()
+def get_users_permissions(object):
+    return get_users_with_perms(
+        object, attach_perms=True, with_superusers=False, with_group_users=False
+    ).items()

promgen/urls.py

@@ -87,6 +87,9 @@
     path("rule/<int:pk>/toggle", views.RuleToggle.as_view(), name="rule-toggle"),
     path("rule/<int:pk>/test", csrf_exempt(views.RuleTest.as_view()), name="rule-test"),
     path("rule/<int:pk>/duplicate", views.RulesCopy.as_view(), name="rule-overwrite"),
+    # Permissions
+    path("permission/assign", views.PermissionAssign.as_view(), name="permission-assign"),
+    path("permission/delete", views.PermissionDelete.as_view(), name="permission-delete"),
     # Generic Rules
     path("<content_type>/<object_id>/rule", views.AlertRuleRegister.as_view(), name="rule-new"),
     # Other miscellaneous

promgen/views.py

@@ -29,6 +29,7 @@
 from django.views.generic.base import RedirectView, TemplateView
 from django.views.generic.detail import SingleObjectMixin
 from django.views.generic.edit import CreateView, DeleteView, FormView
+from guardian.shortcuts import assign_perm, get_perms, remove_perm
 from prometheus_client.core import CounterMetricFamily, GaugeMetricFamily
 from prometheus_client.parser import text_string_to_metric_families
 from requests.exceptions import HTTPError
@@ -45,6 +46,7 @@
     tasks,
     util,
 )
+from promgen.forms import UserPermissionForm
 from promgen.mixins import PromgenGuardianPermissionMixin
 from promgen.shortcuts import resolve_domain
 
@@ -291,6 +293,10 @@ class ServiceDetail(LoginRequiredMixin, DetailView):
         "project_set__notifiers__owner",
     )
 
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["permission_form"] = UserPermissionForm(input_object=self.object)
+        return context
 
 
 class ServiceDelete(PromgenGuardianPermissionMixin, DeleteView):
@@ -503,6 +509,7 @@ def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         context["sources"] = models.Farm.driver_set()
         context["url_form"] = forms.URLForm()
+        context["permission_form"] = UserPermissionForm(input_object=self.object)
         return context
 
 
@@ -517,6 +524,10 @@ class FarmList(LoginRequiredMixin, ListView):
 class FarmDetail(LoginRequiredMixin, DetailView):
     model = models.Farm
 
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["permission_form"] = UserPermissionForm(input_object=self.object)
+        return context
 
 
 class FarmUpdate(PromgenGuardianPermissionMixin, UpdateView):
@@ -1552,3 +1563,57 @@ def get(self, request):
             return util.proxy_error(response)
 
         return HttpResponse(response.content, content_type="application/json")
+
+
+class PermissionAssign(PromgenGuardianPermissionMixin, View):
+    permission_required = ["manage_service", "manage_project", "manage_farm"]
+
+    def post(self, request):
+        user = User.objects.get_by_natural_key(request.POST["username"])
+        permission = request.POST["permission"]
+        obj = self.get_object()
+
+        # User should only have one permission MANAGE or EDIT for an object
+        # So we remove all permissions before assigning new one
+        permissions = get_perms(user, obj)
+        for perm in permissions:
+            remove_perm(perm, user, obj)
+
+        assign_perm(permission, user, obj)
+        messages.success(
+            request,
+            "Assigned permission: {} for user: {} on: {}".format(
+                permission, user.username, obj.name
+            ),
+        )
+        return redirect(request.POST["next"])
+
+    def get_object(self):
+        id = self.request.POST["id"]
+        model = self.request.POST["model"]
+        models = ContentType.objects.get(app_label="promgen", model=model)
+        obj = models.get_object_for_this_type(pk=id)
+        return obj
+
+
+class PermissionDelete(PromgenGuardianPermissionMixin, View):
+    permission_required = ["manage_service", "manage_project", "manage_farm"]
+
+    def post(self, request):
+        user = User.objects.get_by_natural_key(request.POST["username"])
+        obj = self.get_object()
+        permissions = get_perms(user, obj)
+        for perm in permissions:
+            remove_perm(perm, user, obj)
+        messages.success(
+            request,
+            "Removed all permissions of user: {} on: {}".format(user.username, obj.name),
+        )
+        return redirect(request.POST["next"])
+
+    def get_object(self):
+        id = self.request.POST["id"]
+        model = self.request.POST["model"]
+        models = ContentType.objects.get(app_label="promgen", model=model)
+        obj = models.get_object_for_this_type(pk=id)
+        return obj