[PATCH 2/6] models: Add list archive lookup

[Andrew Donnellan]

Add a list_archive_lookup_prefix field to Project, which will contain the
address of a Message-ID redirector, e.g. "https://lore.kernel.org/r/".

Add a list_archive_url property to Submission and Comment, to generate an
archive lookup URL based on the Message-ID.

We will use this to display links to mailing list archives.

Suggested-by: Takashi Iwai <tiwai at suse.de>
Signed-off-by: Andrew Donnellan <ajd at linux.ibm.com>
---
 ...0035_project_list_archive_lookup_prefix.py | 20 ++++++++++++++++
 patchwork/models.py                           | 23 +++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 patchwork/migrations/0035_project_list_archive_lookup_prefix.py

diff --git a/patchwork/migrations/0035_project_list_archive_lookup_prefix.py b/patchwork/migrations/0035_project_list_archive_lookup_prefix.py
new file mode 100644
index 000000000000..7d5f94a462a5
--- /dev/null
+++ b/patchwork/migrations/0035_project_list_archive_lookup_prefix.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.21 on 2019-07-01 12:57
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('patchwork', '0034_project_list_archive_url'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='project',
+            name='list_archive_lookup_prefix',
+            field=models.CharField(blank=True, help_text=b"URL prefix for the list archive's Message-ID redirector. To generate the list archive link for a patch, the Message-ID is appended to the end of this prefix.", max_length=2000),
+        ),
+    ]
diff --git a/patchwork/models.py b/patchwork/models.py
index e43b062b6f89..04d87a459e3a 100644
--- a/patchwork/models.py
+++ b/patchwork/models.py
@@ -78,6 +78,11 @@ class Project(models.Model):
     scm_url = models.CharField(max_length=2000, blank=True)
     webscm_url = models.CharField(max_length=2000, blank=True)
     list_archive_url = models.CharField(max_length=2000, blank=True)
+    list_archive_lookup_prefix = models.CharField(
+        max_length=2000, blank=True,
+        help_text="URL prefix for the list archive's Message-ID redirector. "
+        "To generate the list archive link for a patch, the Message-ID is "
+        "appended to the end of this prefix.")
 
     # configuration options
 
@@ -358,6 +363,15 @@ class Submission(FilenameMixin, EmailMixin, models.Model):
 
     name = models.CharField(max_length=255)
 
+    @property
+    def list_archive_url(self):
+        if not self.project.list_archive_lookup_prefix:
+            return None
+        if not self.msgid:
+            return None
+        return self.project.list_archive_lookup_prefix + \
+            self.msgid.strip('<>')
+
     # patchwork metadata
 
     def is_editable(self, user):
@@ -591,6 +605,15 @@ class Comment(EmailMixin, models.Model):
                                    related_query_name='comment',
                                    on_delete=models.CASCADE)
 
+    @property
+    def list_archive_url(self):
+        if not self.submission.project.list_archive_lookup_prefix:
+            return None
+        if not self.msgid:
+            return None
+        return self.project.list_archive_lookup_prefix + \
+            self.msgid.strip('<>')
+
     def get_absolute_url(self):
         return reverse('comment-redirect', kwargs={'comment_id': self.id})
 
-- 
2.20.1