admin broadcast message feature

capsulflask/__init__.py

@@ -14,6 +14,7 @@ from flask_mail import Mail, Message
 from flask import render_template
 from flask import url_for
 from flask import current_app
+from flask import flash
 from apscheduler.schedulers.background import BackgroundScheduler
 
 
@@ -207,6 +208,10 @@ def security_headers(response):
   if 'Content-Security-Policy' not in response.headers:
     response.headers['Content-Security-Policy'] = "default-src 'self'"
   response.headers['X-Content-Type-Options'] = 'nosniff'
+
+  if current_app.config['BROADCAST_BANNER_MESSAGE'] is not None and current_app.config['BROADCAST_BANNER_MESSAGE'] != "":
+    flash(current_app.config['BROADCAST_BANNER_MESSAGE'])
+
   return response
 
 

capsulflask/admin.py

@@ -60,6 +60,13 @@ def index():
       current_app.logger.info(f"sending email is done.")
       return redirect(f"{url_for('admin.index')}")
 
+    elif request.form['action'] == "set_broadcast_message":
+      get_model().set_broadcast_message(request.form['message'])
+      current_app.config['BROADCAST_BANNER_MESSAGE'] = request.form['message']
+      session.pop('_flashes', None)
+
+      return redirect(f"{url_for('admin.index')}")
+
     elif request.form['action'] == "start_or_stop":
       if 'id' not in request.form:
         return abort(400, "id is required")

capsulflask/db.py

@@ -50,13 +50,13 @@ def init_app(app, is_running_server):
   hasSchemaVersionTable = False
   actionWasTaken = False
   schemaVersion = 0
-  desiredSchemaVersion = 23
+  desiredSchemaVersion = 24
 
   cursor = connection.cursor()
 
   cursor.execute("""
-    SELECT table_name, table_schema FROM information_schema.tables WHERE table_schema = '{}'
-  """.format(app.config['DATABASE_SCHEMA']))
+    SELECT table_name, table_schema FROM information_schema.tables WHERE table_schema = %s
+  """, (app.config['DATABASE_SCHEMA'], ))
 
   rows = cursor.fetchall()
   for row in rows:
@@ -110,6 +110,13 @@ def init_app(app, is_running_server):
       ))
       exit(1)
 
+  cursor.execute("SELECT message FROM broadcast_message")
+  rows = cursor.fetchall()
+  if len(rows) > 0:
+    app.config['BROADCAST_BANNER_MESSAGE'] = rows[0][0]
+  else:
+    app.config['BROADCAST_BANNER_MESSAGE'] = None
+
   cursor.close()
   
   app.config['PSYCOPG2_CONNECTION_POOL'].putconn(connection)

capsulflask/db_model.py

@@ -509,3 +509,6 @@ class DBModel:
 
 
 
+  def set_broadcast_message(self, message):
+    self.cursor.execute("DELETE FROM broadcast_message; INSERT INTO broadcast_message (message) VALUES (%s)", (message, ))
+    self.connection.commit()

capsulflask/schema_migrations/24_down_broadcast_message.sql

@@ -0,0 +1,4 @@
+
+DROP TABLE broadcast_message;
+
+UPDATE schemaversion SET version = 23;

capsulflask/schema_migrations/24_up_broadcast_message.sql

@@ -0,0 +1,7 @@
+
+
+CREATE TABLE broadcast_message (
+   message TEXT NOT NULL
+);
+
+UPDATE schemaversion SET version = 24;

capsulflask/templates/admin.html

@@ -152,6 +152,19 @@
   <hr/>
 {% endif %}
 
+<div class="third-margin">
+  <div class="row">
+    <h1>📰 Sitewide Banner: Post a temporary message across the site 📰</h1>
+  </div>
+  <div class="row">
+    <form method="post" class="megaphone">
+      <input type="hidden" name="action" value="set_broadcast_message"></input> 
+      <input type="hidden" name="csrf-token" value="{{ csrf_token }}"/>
+      <input type="text"  name="message"  placeholder="blahblahblah..." />
+      <input type="submit" value="SET"/>
+    </form>
+  </div>
+
 <div class="third-margin">
   <div class="row">
     <h1>📢 Admin Megaphone: Email All Users who have Active Capsuls 📢</h1>

capsulflask/templates/base.html

@@ -30,7 +30,7 @@
     <a href="/changelog">Changelog</a>
 
     {% if session["account"] %} 
-      <a href="/console">Capsuls</a>
+      <a href="/console/">Capsuls</a>
       <a href="/console/ssh">SSH Public Keys</a>
       <a href="/console/account-balance">Account Balance</a>
     {% endif %}