Alert Improvements by Xon 2.13.0

A collection of improvements to the XenForo Alerts system.

This add-on requires php 5.6 or newer

Features

• For threads/conversation/profile pages, automatically marks alerts as read from content on a given page when viewed.
• Mark unread link for individual alerts on the Alerts page.
• Supports the following add-ons:
  • Content Ratings
• Global Optional, Alert summerization by selected content type or user
• User Option to prevent marking as read when accessing /accounts/alerts page.
• User Option to prevent summerization when accessing /accounts/alerts page.
• User Option to adjust summerization threshold

Supported content types for alert summerization

• Posts, Conversation, Profile post, profile post comments Likes
• Ratings (From Content Ratings)

Performance impact

• Adds an extra column to xf_alert.
  
  Code:
• 
  
  alter table xf_user_alert summerize_id add int(10) unsigned DEFAULT NULL
• 1 extra SELECT query per thread page request when the user has more than zero active alerts.
  • If there are alerts to mark as read, then an extra UPDATE is required.

Alert Summerization Performance impact

• On accessing alerts above the summerize threshold, fetches all unread alerts and attempts to group them in PHP.
• On successfully generating summary alerts, 2 queries are done. 1 insert to add the summary alert, 1 updating summerized alerts.