Add list of similar packages in details page

app/templates/packages/view.html

@@ -258,4 +258,27 @@
 			{% endfor %}
 		</ul>
 	{% endif %}
+
+	{% if similar_topics %}
+		<h3>Similar Forum Topics</h3>
+		{% if not package.approved and package.type == package.type.MOD %}
+			<div class="box box_grey alert alert-warning">
+				Please make sure that this package has the right to
+				the name '{{ package.name }}'.
+				See the
+				<a href="/policy_and_guidance/">Inclusion Policy</a>
+				for more info.
+			</div>
+		{% endif %}
+		<ul>
+			{% for t in similar_topics %}
+				<li>
+					[{{ t.getType().value }}]
+					<a href="https://forum.minetest.net/viewtopic.php?t={{ t.topic_id }}">
+						{{ t.title }} by {{ t.author.display_name }}
+					</a>
+				</li>
+			{% endfor %}
+		</ul>
+	{% endif %}
 {% endblock %}

app/views/packages/__init__.py

@@ -96,11 +96,22 @@ def package_page(package):
 					.order_by(db.asc(Package.title)) \
 					.all()
 
+		show_similar_topics = current_user == package.author or \
+				package.checkPerm(current_user, Permission.APPROVE_NEW)
+
+		similar_topics = None if not show_similar_topics else \
+				KrockForumTopic.query \
+					.filter_by(name=package.name) \
+					.filter(KrockForumTopic.topic_id != package.forums) \
+					.filter(~ db.exists().where(Package.forums==KrockForumTopic.topic_id)) \
+					.order_by(db.asc(KrockForumTopic.name), db.asc(KrockForumTopic.title)) \
+					.all()
+
 		releases = getReleases(package)
 		requests = [r for r in package.requests if r.status == 0]
 		return render_template("packages/view.html", \
 				package=package, releases=releases, requests=requests, \
-				alternatives=alternatives)
+				alternatives=alternatives, similar_topics=similar_topics)
 
 
 @app.route("/packages/<author>/<name>/download/")