views: Add notes to patch-detail view

The submission template now includes a section to display notes, these
can be filtered out depending if the request user is a maintainer for
the patch's project and on the note maintainer_only attribute

Signed-off-by: andrepapoti <andrepapoti@gmail.com>

Author: andrepapoti

patchwork/templates/patchwork/submission.html

@@ -266,6 +266,24 @@ <h2>Message</h2>
   </pre>
 </div>
 
+{% for note in notes %}
+{% if forloop.first %}
+<h2>Notes</h2>
+{% endif %}
+<a name="{{ item.id }}"></a>
+<div class="submission-message">
+  <div class="meta">
+    {{ note.patch.submitter|personify:project }}
+    <span class="message-date">
+      Last modified: {{ note.last_modified }} UTC
+    </span>
+  </div>
+  <pre class="content">
+    {{ note.content }}
+  </pre>
+</div>
+{% endfor %}
+
 {% for item in comments %}
 {% if forloop.first %}
 <h2>Comments</h2>

patchwork/tests/views/test_patch.py

@@ -19,6 +19,7 @@
 from patchwork.models import State
 from patchwork.tests.utils import create_check
 from patchwork.tests.utils import create_maintainer
+from patchwork.tests.utils import create_note
 from patchwork.tests.utils import create_patch
 from patchwork.tests.utils import create_patch_comment
 from patchwork.tests.utils import create_patches
@@ -247,6 +248,55 @@ def test_comment_redirect(self):
         response = self.client.get(requested_url)
         self.assertRedirects(response, redirect_url)
 
+    def test_show_note_for_maintainer(self):
+        project = create_project()
+        user = create_maintainer(project)
+        patch = create_patch(project=project)
+        note = create_note(patch=patch, submitter=user)
+        self.client.login(username=user.username, password=user.username)
+        requested_url = reverse(
+            'patch-detail',
+            kwargs={
+                'project_id': patch.project.linkname,
+                'msgid': patch.encoded_msgid,
+            },
+        )
+        response = self.client.get(requested_url)
+        self.assertIn('<h2>Notes</h2>'.encode('utf-8'), response.content)
+        self.assertIn(note.content.encode('utf-8'), response.content)
+
+    def test_hide_private_note(self):
+        project = create_project()
+        user = create_maintainer(project)
+        patch = create_patch(project=project)
+        note = create_note(patch=patch, submitter=user)
+        requested_url = reverse(
+            'patch-detail',
+            kwargs={
+                'project_id': patch.project.linkname,
+                'msgid': patch.encoded_msgid,
+            },
+        )
+        response = self.client.get(requested_url)
+        self.assertNotIn('<h2>Notes</h2>'.encode('utf-8'), response.content)
+        self.assertNotIn(note.content.encode('utf-8'), response.content)
+
+    def test_show_public_note(self):
+        project = create_project()
+        user = create_maintainer(project)
+        patch = create_patch(project=project)
+        note = create_note(patch=patch, submitter=user, maintainer_only=False)
+        requested_url = reverse(
+            'patch-detail',
+            kwargs={
+                'project_id': patch.project.linkname,
+                'msgid': patch.encoded_msgid,
+            },
+        )
+        response = self.client.get(requested_url)
+        self.assertIn('<h2>Notes</h2>'.encode('utf-8'), response.content)
+        self.assertIn(note.content.encode('utf-8'), response.content)
+
     def test_old_detail_url(self):
         patch = create_patch()
 

patchwork/views/patch.py

@@ -122,6 +122,15 @@ def patch_detail(request, project_id, msgid):
         'submitter', 'date', 'id', 'content', 'patch', 'addressed'
     )
 
+    if (
+        request.user.is_superuser
+        or request.user.is_authenticated
+        and patch.project in request.user.profile.maintainer_projects.all()
+    ):
+        notes = patch.note.all()
+    else:
+        notes = patch.note.filter(maintainer_only=False)
+
     if patch.related:
         related_same_project = patch.related.patches.only(
             'name', 'msgid', 'project', 'related'
@@ -136,6 +145,7 @@ def patch_detail(request, project_id, msgid):
         related_same_project = []
         related_different_project = []
 
+    context['notes'] = notes
     context['comments'] = comments
     context['checks'] = Patch.filter_unique_checks(
         patch.check_set.all().select_related('user'),