Merge pull request 'Recognise fediverse community links' (#125) from freamon/pyfedi:test into main

Reviewed-on: https://codeberg.org/rimu/pyfedi/pulls/125

app/__init__.py

@@ -18,6 +18,8 @@ from sqlalchemy_searchable import make_searchable
 
 from config import Config
 
+import re
+
 
 def get_locale():
     try:
@@ -103,6 +105,13 @@ def create_app(config_class=Config):
 
     app.jinja_env.globals['get_resource_as_string'] = get_resource_as_string
 
+    def community_link_to_href(link: str) -> str:
+        pattern = r"!([a-zA-Z0-9_.-]*)@([a-zA-Z0-9_.-]*)\b"
+        server = r'<a href=https://' + app.config['SERVER_NAME'] + r'/community/lookup/'
+        return re.sub(pattern, server + r'\g<1>/\g<2>>' + r'!\g<1>@\g<2></a>', link)
+
+    app.jinja_env.filters['community_links'] = community_link_to_href
+
     # send error reports via email
     if app.config['MAIL_SERVER'] and app.config['MAIL_ERRORS']:
         auth = None

app/community/routes.py

@@ -1023,3 +1023,41 @@ def community_moderate_report_resolve(community_id, report_id):
                 return redirect(url_for('community.community_moderate', actor=community.link()))
             else:
                 return render_template('community/community_moderate_report_resolve.html', form=form)
+
+
+@bp.route('/lookup/<community>/<domain>')
+def lookup(community, domain):
+    if domain == current_app.config['SERVER_NAME']:
+        return redirect('/c/' + community)
+
+    exists = Community.query.filter_by(name=community, ap_domain=domain).first()
+    if exists:
+        return redirect('/c/' + community + '@' + domain)
+    else:
+        address = '!' + community + '@' + domain
+        if current_user.is_authenticated:
+            new_community = None
+
+            new_community = search_for_community(address)
+            if new_community is None:
+                if g.site.enable_nsfw:
+                    flash(_('Community not found.'), 'warning')
+                else:
+                    flash(_('Community not found. If you are searching for a nsfw community it is blocked by this instance.'), 'warning')
+            else:
+                if new_community.banned:
+                    flash(_('That community is banned from %(site)s.', site=g.site.name), 'warning')
+
+            return render_template('community/lookup_remote.html',
+                           title=_('Search result for remote community'), new_community=new_community,
+                           subscribed=community_membership(current_user, new_community) >= SUBSCRIPTION_MEMBER)
+        else:
+            # send them back where they came from
+            flash('Searching for remote communities requires login', 'error')
+            referrer = request.headers.get('Referer', None)
+            if referrer is not None:
+                return redirect(referrer)
+            else:
+                return redirect('/')
+
+

app/templates/community/lookup_remote.html

@@ -0,0 +1,32 @@
+{% if theme() and file_exists('app/templates/themes/' + theme() + '/base.html') %}
+    {% extends 'themes/' + theme() + '/base.html' %}
+{% else %}
+    {% extends "base.html" %}
+{% endif %} %}
+{% from 'bootstrap/form.html' import render_form %}
+
+{% block app_content %}
+        {% if new_community and not new_community.banned %}
+            <div class="row">
+                <div class="col mx-auto">
+                    <div class="card mt-5">
+                        <div class="card-body p-6">
+                            <div class="card-title">{{ _('Found a community:') }}</div>
+                            <div class="card-body">
+                                <p>
+                                    <a href="/c/{{ new_community.link() }}"><img src="{{ new_community.icon_image()}}" class="community_icon rounded-circle" style="width: 30px; vertical-align: middle;" /></a>
+                                    <a href="/c/{{ new_community.link() }}">{{ new_community.title }}@{{ new_community.ap_domain }}</a>
+                                </p>
+                                <p> {% if subscribed %}
+                                        <a class="btn btn-primary mt-4" href="/community/{{ new_community.link() }}/unsubscribe">{{ _('Leave') }}</a>
+                                    {% else %}
+                                        <a class="btn btn-primary mt-4" href="/community/{{ new_community.link() }}/subscribe">{{ _('Join') }}</a>
+                                    {% endif %}
+                                </p>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        {% endif %}
+{% endblock %}

app/templates/post/_post_full.html

@@ -42,7 +42,7 @@
                 {% endif %}
             </div>
             <div class="post_body mt-2">
-                {{ post.body_html|safe if post.body_html else '' }}
+                {{ post.body_html|community_links|safe if post.body_html else '' }}
             </div>
         </div>
     {% else %}
@@ -99,7 +99,7 @@
                 {% endif %}
             {% endif %}
             <div class="post_body">
-                {{ post.body_html|safe if post.body_html else '' }}
+                {{ post.body_html|community_links|safe if post.body_html else '' }}
             </div>
         </div>
     {% endif %}

app/templates/post/post.html

@@ -109,7 +109,7 @@
                                 {% endif %}
                             </div>
                             <div class="comment_body hidable {% if comment['comment'].reports and current_user.is_authenticated and post.community.is_moderator(current_user) %}reported{% endif %}">
-                                {{ comment['comment'].body_html | safe }}
+                                {{ comment['comment'].body_html | community_links | safe }}
                             </div>{% if not comment['comment'].author.indexable %}<!--googleon: all-->{% endif %}
                         </div>
                         <div class="comment_actions hidable">