use is_job_poster rules in views and templates, create renew view

jobs/templates/base.html

@@ -22,6 +22,12 @@
     </div>   
     
     <div class="container">
+        {% for message in messages %}
+        <div class="alert alert-{{ message.tags }} alert-dismissable">
+            <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&#215;</button>
+            {{ message }}
+        </div>
+        {% endfor %}
         {% block body_content %}{% endblock %}
     
         <footer class="pt-4 my-md-5 pt-md-5 border-top">

jobs/templates/jobs/job_detail.html

@@ -1,4 +1,6 @@
-{% extends 'base.html' %} {% block body_content %}
+{% extends 'base.html' %} 
+{% load rules %}
+{% block body_content %}
 <div class="row">
     <div class="col-md-12">
         <div class="pricing-header px-3 py-3 pt-md-5 pb-md-4 mx-auto text-center">
@@ -22,7 +24,15 @@
                     - {{question.name}} <br/>
                 {% endfor %}
                 <br/>
+                 {% has_perm 'jobs.change_job' request.user job as can_change_job %} 
+                 {% if can_change_job %}
+                    <form method="POST" action="{% url 'jobs:job_renew' job.pk %}">
+                        {% csrf_token %}
+                        <button type="submit" class="btn btn-primary">Renew Job</button>
+                    </form>
+                 {% else %}                                    
                     <a href="{% url 'jobs:job_apply' job.pk %}" class="card-link">Apply</a>
+                 {% endif %}
             </div>
         </div>
     </div>

jobs/urls.py

@@ -1,15 +1,20 @@
 from django.urls import path
 
-from .views import Index, JobCreate, JobList, JobDetail, ApplicationCreate
+from . import views
 from . import autocomplete as autocomplete_views
 
 app_name = 'jobs'
 urlpatterns = [
-    path('', Index.as_view(), name='index'),
-    path('jobs/create/', JobCreate.as_view(), name='create'),
-    path('jobs/', JobList.as_view(), name='list'),
-    path('jobs/<int:pk>/detail/', JobDetail.as_view(), name='job_detail'),
-    path('jobs/<int:job_pk>/apply/', ApplicationCreate.as_view(), name='job_apply'),
+    path('', views.Index.as_view(), name='index'),
+    path('jobs/create/', views.JobCreate.as_view(), name='create'),
+    path('jobs/', views.JobList.as_view(), name='list'),
+    path(
+        'jobs/<int:pk>/detail/', views.JobDetail.as_view(), name='job_detail'),
+    path('jobs/<int:pk>/renew/', views.JobRenew.as_view(), name='job_renew'),
+    path(
+        'jobs/<int:job_pk>/apply/',
+        views.ApplicationCreate.as_view(),
+        name='job_apply'),
 ]
 
 # autocomplete endpoints

jobs/views.py

@@ -1,8 +1,10 @@
 from django.urls import reverse_lazy
 from django.http import HttpResponseRedirect
-from django.views.generic import (
-    TemplateView, ListView, CreateView, DetailView
-)
+from django.contrib import messages
+from django.views.generic import (View, TemplateView, ListView, CreateView,
+                                  DetailView)
+from django.views.generic.detail import SingleObjectMixin
+from rules.contrib.views import PermissionRequiredMixin
 
 from .models import Job, Application, Question
 from .forms import JobForm, QuestionFormSet, ApplicationForm, AnswerForm
@@ -22,6 +24,21 @@ class JobDetail(DetailView):
     model = Job
 
 
+class JobRenew(PermissionRequiredMixin, SingleObjectMixin, View):
+    model = Job
+    permission_required = 'jobs.change_job'
+    http_method_names = ['post']
+
+    def post(self, request, *args, **kwargs):
+        job = self.get_object()
+        job.renew()
+        messages.add_message(
+            request, messages.SUCCESSS,
+            'Job has been renewed until {}.'.format(
+                job.expires.isoformat(' ', 'seconds')))
+        return HttpResponseRedirect(job.get_absolute_url())
+
+
 class JobCreate(CreateView):
     model = Job
     form_class = JobForm
@@ -56,9 +73,7 @@ class JobCreate(CreateView):
 
     def form_invalid(self, form, question_form):
         return self.render_to_response(
-            self.get_context_data(
-                form=form,
-                question_form=question_form))
+            self.get_context_data(form=form, question_form=question_form))
 
 
 class ApplicationCreate(CreateView):
@@ -68,12 +83,15 @@ class ApplicationCreate(CreateView):
     success_url = reverse_lazy("jobs:list")
 
     def get_question_queryset(self):
-        return Question.objects.filter(job_id=self.kwargs['job_pk']).order_by('id')
+        # filter questions for particular job and order it so same queryset
+        # can be used stably as initial params for GET and POST requests
+        return Question.objects.filter(
+            job_id=self.kwargs['job_pk']).order_by('id')
 
     def get_answer_formset(self, *args):
         questions = self.get_question_queryset()
-        return AnswerForm.inlineformset_factory(
-            extra=questions.count())(initial=[{
+        return AnswerForm.inlineformset_factory(extra=questions.count())(
+            initial=[{
                 'question': q.id
             } for q in questions], *args)