admin can send email newsletters

app/admin/forms.py

@@ -113,3 +113,11 @@ class EditUserForm(FlaskForm):
     indexable = BooleanField(_l('Allow search engines to index this profile'))
     manually_approves_followers = BooleanField(_l('Manually approve followers'))
     submit = SubmitField(_l('Save'))
+
+
+class SendNewsletterForm(FlaskForm):
+    subject = StringField(_l('Subject'), validators=[DataRequired()])
+    body_text = TextAreaField(_l('Body (text)'), render_kw={"rows": 10}, validators=[DataRequired()])
+    body_html = TextAreaField(_l('Body (html)'), render_kw={"rows": 20}, validators=[DataRequired()])
+    test = BooleanField(_l('Test mode'), render_kw={'checked': True})
+    submit = SubmitField(_l('Send newsletter'))

app/admin/routes.py

@@ -11,8 +11,8 @@ from app.activitypub.routes import process_inbox_request, process_delete_request
 from app.activitypub.signature import post_request
 from app.activitypub.util import default_context
 from app.admin.forms import FederationForm, SiteMiscForm, SiteProfileForm, EditCommunityForm, EditUserForm, \
-    EditTopicForm
-from app.admin.util import unsubscribe_from_everything_then_delete, unsubscribe_from_community
+    EditTopicForm, SendNewsletterForm
+from app.admin.util import unsubscribe_from_everything_then_delete, unsubscribe_from_community, send_newsletter
 from app.community.util import save_icon_file, save_banner_file
 from app.models import AllowedInstances, BannedInstances, ActivityPubLog, utcnow, Site, Community, CommunityMember, \
     User, Instance, File, Report, Topic, UserRegistration
@@ -596,4 +596,21 @@ def admin_reports():
                            moderating_communities=moderating_communities(current_user.get_id()),
                            joined_communities=joined_communities(current_user.get_id()),
                            site=g.site
-                           )
+                           )
+
+
+@bp.route('/newsletter', methods=['GET', 'POST'])
+@login_required
+@permission_required('administer all users')
+def newsletter():
+    form = SendNewsletterForm()
+    if form.validate_on_submit():
+        send_newsletter(form)
+        flash('Newsletter sent')
+        return redirect(url_for('admin.newsletter'))
+
+    return render_template("admin/newsletter.html", form=form, title=_('Send newsletter'),
+                           moderating_communities=moderating_communities(current_user.get_id()),
+                           joined_communities=joined_communities(current_user.get_id()),
+                           site=g.site
+                           )

app/admin/util.py

@@ -1,4 +1,7 @@
-from flask import request, abort, g, current_app, json
+from flask import request, abort, g, current_app, json, flash, render_template
+from flask_login import current_user
+from sqlalchemy import text, desc
+
 from app import db, cache, celery
 from app.activitypub.signature import post_request
 from app.activitypub.util import default_context
@@ -70,3 +73,31 @@ def unsubscribe_from_community(community, user):
     post_request(community.ap_inbox_url, undo, user.private_key, user.profile_id() + '#main-key')
     activity.result = 'success'
     db.session.commit()
+
+
+def send_newsletter(form):
+    recipients = User.query.filter(User.newsletter == True, User.banned == False, User.ap_id == None).order_by(desc(User.id)).limit(40000)
+
+    from app.email import send_email
+
+    if recipients.count() == 0:
+        flash('No recipients', 'error')
+
+    for recipient in recipients:
+        body_text = render_template('email/newsletter.txt',
+                                    recipient=recipient if not form.test.data else current_user,
+                                    content=form.body_text.data)
+        body_html = render_template('email/newsletter.html',
+                                    recipient=recipient if not form.test.data else current_user,
+                                    content=form.body_html.data,
+                                    domain=current_app.config['SERVER_NAME'])
+        if form.test.data:
+            to = current_user.email
+        else:
+            to = recipient.email
+
+        send_email(subject=form.subject.data, sender=f'{g.site.name} <noreply@{current_app.config["SERVER_NAME"]}>', recipients=[to],
+                   text_body=body_text, html_body=body_html)
+
+        if form.test.data:
+            break

app/templates/admin/_nav.html

@@ -10,5 +10,6 @@
     {% endif %}
     <a href="{{ url_for('admin.admin_reports') }}">{{ _('Moderation') }}</a> |
     <a href="{{ url_for('admin.admin_federation') }}">{{ _('Federation') }}</a> |
+    <a href="{{ url_for('admin.newsletter') }}">{{ _('Newsletter') }}</a> |
     <a href="{{ url_for('admin.admin_activities') }}">{{ _('Activities') }}</a>
 </nav>

app/templates/admin/newsletter.html

@@ -0,0 +1,17 @@
+{% extends "base.html" %}
+{% from 'bootstrap/form.html' import render_form %}
+
+{% block app_content %}
+
+<div class="row">
+    <div class="col">
+        {% include 'admin/_nav.html' %}
+    </div>
+</div>
+
+<div class="row">
+    <div class="col">
+        {{ render_form(form) }}
+    </div>
+</div>
+{% endblock %}

app/templates/email/newsletter.html

@@ -0,0 +1,5 @@
+<p><a href="https://{{ domain }}/"><img src="https://piefed.social/static/images/logo2.png" style="max-width: 100%; margin-bottom: 20px;" width="50" height="50" alt="PieFed logo" /></a></p><p>Hello {{ recipient.display_name() }},</p>
+{{ content|safe }}
+<p>&nbsp;</p>
+<p><small><a href="{{ url_for('user.user_newsletter_unsubscribe', user_id=recipient.id, token=recipient.verification_token, _external=True) }}">Unsubscribe from PieFed newsletter</a></small></p>
+

app/templates/email/newsletter.txt

@@ -0,0 +1,6 @@
+Hello {{ recipient.display_name() }},</p>
+
+{{ content }}
+
+
+Unsubscribe from PieFed newsletter at {{ url_for('user.user_newsletter_unsubscribe', user_id=recipient.id, token=recipient.verification_token, _external=True) }}.

app/templates/email/welcome.txt

@@ -17,3 +17,4 @@ Warm regards,
 Rimu Atkinson
 Founder
 
+Unsubscribe from PieFed newsletter at {{ url_for('user.user_newsletter_unsubscribe', user_id=user.id, token=user.verification_token, _external=True) }}.