Send reminders before the TU voting period ends

Add a new script that checks for TU votes ending within the next 48
hours and sends reminder emails to all Trusted Users who did not cast
their votes yet.

The script is designed to be executed as a cron job, such that the check
is performed periodically. Since the script does not remember users it
already sent emails to, the interval should not be chosen too small to
avoid spamming.

Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

scripts/notify.py

@@ -139,6 +139,15 @@ def get_request_recipients(cur, reqid):
     return [row[0] for row in cur.fetchall()]
 
 
+def get_tu_vote_reminder_recipients(cur, vote_id):
+    cur.execute('SELECT Users.Email FROM Users WHERE AccountTypeID = 2 ' +
+                'EXCEPT SELECT Users.Email FROM Users ' +
+                'INNER JOIN TU_Votes ' +
+                'ON TU_Votes.UserID = Users.ID ' +
+                'WHERE TU_Votes.VoteID = %s', [vote_id])
+    return [row[0] for row in cur.fetchall()]
+
+
 def get_comment(cur, comment_id):
     cur.execute('SELECT Comments FROM PackageComments WHERE ID = %s',
                 [comment_id])
@@ -405,6 +414,19 @@ def request_close(cur, uid, reqid, reason):
     send_notification(to, subject, body, refs, headers)
 
 
+def tu_vote_reminder(cur, vote_id):
+    to = get_tu_vote_reminder_recipients(cur, vote_id)
+
+    vote_uri = aur_location + '/tu/?id=' + vote_id
+
+    subject = 'TU Vote Reminder: Proposal %d' % (int(vote_id))
+    body = 'Please remember to cast your vote on proposal %d [1]. ' \
+           'The voting period ends in less than 48 hours.' % (int(vote_id))
+    refs = '[1] ' + vote_uri
+
+    send_notification(to, subject, body, refs)
+
+
 if __name__ == '__main__':
     action = sys.argv[1]
     action_map = {
@@ -420,6 +442,7 @@ if __name__ == '__main__':
         'delete': delete,
         'request-open': request_open,
         'request-close': request_close,
+        'tu-vote-reminder': tu_vote_reminder,
     }
 
     db = mysql.connector.connect(host=aur_db_host, user=aur_db_user,

scripts/tuvotereminder.py

@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+
+import configparser
+import mysql.connector
+import os
+import subprocess
+import time
+
+config = configparser.RawConfigParser()
+config.read(os.path.dirname(os.path.realpath(__file__)) + "/../conf/config")
+
+aur_db_host = config.get('database', 'host')
+aur_db_name = config.get('database', 'name')
+aur_db_user = config.get('database', 'user')
+aur_db_pass = config.get('database', 'password')
+aur_db_socket = config.get('database', 'socket')
+notify_cmd = config.get('notifications', 'notify-cmd')
+
+db = mysql.connector.connect(host=aur_db_host, user=aur_db_user,
+                             passwd=aur_db_pass, db=aur_db_name,
+                             unix_socket=aur_db_socket, buffered=True)
+cur = db.cursor()
+
+now = int(time.time())
+filter_from = now + 500
+filter_to = now + 172800
+
+cur.execute("SELECT ID FROM TU_VoteInfo WHERE End >= %s AND End <= %s",
+            [filter_from, filter_to])
+
+for vote_id in [row[0] for row in cur.fetchall()]:
+    subprocess.Popen((notify_cmd, 'tu-vote-reminder', str(vote_id)))