store: add rss for news

Co-authored-by: oleole39

store/app.py

@@ -11,6 +11,7 @@ import hmac
 import string
 import random
 import urllib
+from datetime import datetime
 from slugify import slugify
 from flask import (
     Flask,
@@ -19,6 +20,7 @@ from flask import (
     session,
     redirect,
     request,
+    make_response,
 )
 from flask_babel import Babel
 from flask_babel import gettext as _
@@ -89,6 +91,13 @@ def days_ago(timestamp):
     return int((time.time() - timestamp) / (60 * 60 * 24))
 
 
+@app.template_filter("format_datetime")
+def format_datetime(value, format="%d %b %Y %I:%M %p"):
+    if value is None:
+        return ""
+    return datetime.strptime(value, "%b %d %Y").strftime(format)
+
+
 @app.context_processor
 def utils():
     d = {
@@ -487,6 +496,22 @@ def charts():
     )
 
 
+@app.route("/news.rss")
+def news_rss():
+
+    news_per_date = json.loads(open(".cache/news.json").read())
+
+    # Keepy only the last N entries
+    news_per_date = {d: infos for d, infos in reversed(list(news_per_date.items())[-2:])}
+
+    rss_xml = render_template('news_rss.xml', news_per_date=news_per_date, catalog=get_catalog())
+    response = make_response(rss_xml)
+    response.headers['Content-Type'] = 'application/rss+xml'
+    response.headers['Content-Disposition'] = "inline; filename=news_rss.xml"
+    return response
+
+
+
 ###############################################################################
 #                        Session / SSO using Discourse                        #
 ###############################################################################

store/templates/charts.html

@@ -10,8 +10,13 @@
     <div id="levelHistory" class="h-80"></div>
 </div>
 
-<div class="mx-auto w-80">
-    <h1 class="text-center font-medium text-2xl py-2">{{ _("History") }}</h1>
+<div class="mx-auto w-80 py-2">
+    <h1 class="text-center font-medium text-2xl pt-4">
+        {{ _("History") }}
+		<link rel="alternate" type="application/rss+xml" title="YunoHost apps catalog news" href="{{ url_for('news_rss')}}" />
+		<a href="{{ url_for('news_rss')}}" class="btn btn-sm h-6 bg-orange-500 text-white !font-bold align-middle !px-2 !py-1"><i class="fa fa-rss-square" aria-hidden="true"></i> Suscribe via RSS</a>
+    </h1>
+
     <div>
         {% for date, news in news_per_date.items()|reverse %}
             <h2 class="text-center font-medium text-xl py-4">{{ date }}</h2>

store/templates/news_rss.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0"
+	xmlns:content="http://purl.org/rss/1.0/modules/content/"
+	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
+	xmlns:dc="http://purl.org/dc/elements/1.1/"
+	xmlns:atom="http://www.w3.org/2005/Atom"
+	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
+	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
+>
+	<channel>
+		<title>YunoHost apps catalog News</title>
+		<link>{{ url_for('news_rss')}}</link>
+		<atom:link href="{{ url_for('news_rss')}}" rel="self" type="application/rss+xml" />
+		<description>YunoHost apps catalog news</description>
+        {%- for date, news in news_per_date.items() %}
+            {%- for status in ("added", "repaired", "broke", "removed") %}i
+                {%- for app, url in news[status] %}
+                    {% set manifest = catalog["apps"][app]["manifest"] %}
+                    <item>
+                        <title>[{{ status|capitalize }}] {{ manifest['name'] }}</title>
+                        <link>{{ url_for('app_info', app_id=app) }}</link>
+                        <guid>{{ app }}#{{ date|format_datetime("%Y%m%d") }}</guid>
+                        <pubDate>{{ date|format_datetime("%a, %d %b %Y %H:%M:%S +0000") }}</pubDate>
+                        <description>{{ manifest["description"].get("en") }}</description>
+                        <content:encoded>{{ manifest["description"].get("en") }}</content:encoded>
+                    </item>
+				{% endfor -%}
+			{% endfor -%}
+		{% endfor %}
+	</channel>
+</rss>