From 2db0897da1c36742003750aa6679765b60ebee39 Mon Sep 17 00:00:00 2001
From: Sehrope Sarkuni <sehrope@jackdb.com>
Date: Wed, 28 Apr 2021 09:24:29 -0400
Subject: [PATCH] Add versions.json endpoint

Add a /version.json endpoint with machine parseable version data. The JSON response is
an array with one entry per release sorted by the major version.
---
 pgweb/core/json.py   | 13 +++++++++++++
 pgweb/core/models.py |  1 +
 pgweb/urls.py        |  6 ++++++
 3 files changed, 20 insertions(+)
 create mode 100644 pgweb/core/json.py

diff --git a/pgweb/core/json.py b/pgweb/core/json.py
new file mode 100644
index 00000000..970da123
--- /dev/null
+++ b/pgweb/core/json.py
@@ -0,0 +1,13 @@
+from django.db.models import F
+from django.http import JsonResponse
+from django.core import serializers
+
+from .models import Version
+
+def versions_json(request):
+    versions = list(Version.objects
+        .filter(tree__gt=0).filter(testing=0)
+        .annotate(major=F('tree'), minor=F('latestminor'))
+        .values('major', 'minor', 'reldate', 'current', 'supported', 'eoldate')
+        .order_by('tree'))
+    return JsonResponse(versions, safe=False, json_dumps_params={'sort_keys': True})
diff --git a/pgweb/core/models.py b/pgweb/core/models.py
index 71886837..ec52ab59 100644
--- a/pgweb/core/models.py
+++ b/pgweb/core/models.py
@@ -83,6 +83,7 @@ class Version(models.Model):
         yield '/docs/manuals'
         yield '/about/featurematrix/$'
         yield '/versions.rss'
+        yield '/versions.json'
 
 
 class Country(models.Model):
diff --git a/pgweb/urls.py b/pgweb/urls.py
index cc29aaba..78b61cee 100644
--- a/pgweb/urls.py
+++ b/pgweb/urls.py
@@ -23,6 +23,7 @@ import pgweb.survey.views
 from pgweb.core.feeds import VersionFeed
 from pgweb.news.feeds import NewsFeed
 from pgweb.events.feeds import EventFeed
+from pgweb.core.json import versions_json
 
 # Uncomment the next two lines to enable the admin:
 from django.contrib import admin
@@ -104,6 +105,11 @@ urlpatterns = [
     url(r'^news(/(?P<tagurl>[^/]+))?.rss$', NewsFeed()),
     url(r'^events.rss$', EventFeed()),
 
+    ###
+    # JSON feeds
+    ###
+    url(r'^versions.json$', versions_json),
+
     ###
     # Special sections
     ###
-- 
2.17.1