topic rss feeds

app/community/routes.py

@@ -190,7 +190,7 @@ def show_community(community: Community):
                            SUBSCRIPTION_MEMBER=SUBSCRIPTION_MEMBER, SUBSCRIPTION_OWNER=SUBSCRIPTION_OWNER, SUBSCRIPTION_MODERATOR=SUBSCRIPTION_MODERATOR,
                            etag=f"{community.id}{sort}{post_layout}_{hash(community.last_active)}", related_communities=related_communities,
                            next_url=next_url, prev_url=prev_url, low_bandwidth=low_bandwidth,
-                           rss_feed=f"https://{current_app.config['SERVER_NAME']}/community/{community.link()}/feed", rss_feed_name=f"{community.title} posts on PieFed",
+                           rss_feed=f"https://{current_app.config['SERVER_NAME']}/community/{community.link()}/feed", rss_feed_name=f"{community.title} on PieFed",
                            content_filters=content_filters, moderating_communities=moderating_communities(current_user.get_id()),
                            joined_communities=joined_communities(current_user.get_id()), sort=sort,
                            inoculation=inoculation[randint(0, len(inoculation) - 1)], post_layout=post_layout, current_app=current_app)
@@ -216,7 +216,7 @@ def show_community_rss(actor):
         og_image = community.image.source_url if community.image_id else None
         fg = FeedGenerator()
         fg.id(f"https://{current_app.config['SERVER_NAME']}/c/{actor}")
-        fg.title(community.title)
+        fg.title(f'{community.title} on {g.site.name}')
         fg.link(href=f"https://{current_app.config['SERVER_NAME']}/c/{actor}", rel='alternate')
         if og_image:
             fg.logo(og_image)

app/templates/topic/show_topic.html

@@ -80,6 +80,9 @@
                     {% endfor %}
                 </ul>
                 <p class="mt-4"><a class="btn btn-primary" href="/communities">{{ _('Explore communities') }}</a></p>
+                <p>
+                    <a class="no-underline" href="{{ rss_feed }}" rel="nofollow"><span class="fe fe-rss"></span> </a><a href="{{ rss_feed }}" rel="nofollow">RSS feed</a>
+                </p>
             </div>
         </div>
         {% endif %}

app/topic/routes.py

@@ -1,7 +1,8 @@
-from datetime import timedelta
+from datetime import timedelta, timezone
 from random import randint
 
-from flask import request, flash, json, url_for, current_app, redirect, abort
+from feedgen.feed import FeedGenerator
+from flask import request, flash, json, url_for, current_app, redirect, abort, make_response, g
 from flask_login import login_required, current_user
 from flask_babel import _
 from sqlalchemy import text, desc, or_
@@ -79,6 +80,8 @@ def show_topic(topic_name):
         return render_template('topic/show_topic.html', title=_(topic.name), posts=posts, topic=topic, sort=sort,
                                page=page, post_layout=post_layout, next_url=next_url, prev_url=prev_url,
                                topic_communities=topic_communities, content_filters=content_filters,
+                               rss_feed=f"https://{current_app.config['SERVER_NAME']}/topic/{topic_name}.rss",
+                               rss_feed_name=f"{topic.name} on {g.site.name}",
                                show_post_community=True, moderating_communities=moderating_communities(current_user.get_id()),
                                joined_communities=joined_communities(current_user.get_id()),
                                inoculation=inoculation[randint(0, len(inoculation) - 1)],
@@ -87,6 +90,43 @@ def show_topic(topic_name):
         abort(404)
 
 
+@bp.route('/topic/<topic_name>.rss', methods=['GET'])
+def show_topic_rss(topic_name):
+    topic = Topic.query.filter(Topic.machine_name == topic_name.strip().lower()).first()
+
+    if topic:
+        posts = Post.query.join(Community, Post.community_id == Community.id).filter(Community.topic_id == topic.id,
+                                                                                     Community.banned == False)
+        posts = posts.filter(Post.from_bot == False, Post.nsfw == False, Post.nsfl == False)
+        posts = posts.order_by(desc(Post.created_at)).limit(100).all()
+
+        fg = FeedGenerator()
+        fg.id(f"https://{current_app.config['SERVER_NAME']}/topic/{topic_name}")
+        fg.title(f'{topic.name} on {g.site.name}')
+        fg.link(href=f"https://{current_app.config['SERVER_NAME']}/topic/{topic_name}", rel='alternate')
+        fg.logo(f"https://{current_app.config['SERVER_NAME']}/static/images/apple-touch-icon.png")
+        fg.subtitle(' ')
+        fg.link(href=f"https://{current_app.config['SERVER_NAME']}/topic/{topic_name}.rss", rel='self')
+        fg.language('en')
+
+        for post in posts:
+            fe = fg.add_entry()
+            fe.title(post.title)
+            fe.link(href=f"https://{current_app.config['SERVER_NAME']}/post/{post.id}")
+            fe.description(post.body_html)
+            fe.guid(post.profile_id(), permalink=True)
+            fe.author(name=post.author.user_name)
+            fe.pubDate(post.created_at.replace(tzinfo=timezone.utc))
+
+        response = make_response(fg.rss_str())
+        response.headers.set('Content-Type', 'application/rss+xml')
+        response.headers.add_header('ETag', f"{topic.id}_{hash(g.site.last_active)}")
+        response.headers.add_header('Cache-Control', 'no-cache, max-age=600, must-revalidate')
+        return response
+    else:
+        abort(404)
+
+
 @bp.route('/choose_topics', methods=['GET', 'POST'])
 @login_required
 def choose_topics():