Alert Improvements by Xon 2.12.2

• Fix adding a user via the admincp could result in a php type error

• Fix alerts grouped by user could occur event if the alerts by a user was less than the configured threshold
• Fix new installs did not migrate alert preferences
• Fix migrating alert preferences would block the installer
• Fix alert preferences where not respected during alert migration from stock to add-on configuration
• Adjust text around the alert pop-up marking alerts as read behavior
• Use a separate css class for the recent alert marker
• Convert confusing named "Alerts pop-up does not mark alerts as read" checkbox to "Alert pop-up read behavior" with the options: "Always mark alerts as read"/"Never mark alerts as read"/"Use per-alert configuration"
• Add style properties "Show recent/unread alert icon on alert" and "Unread/Recent alert icon", disabled by default (previously was enabled)

• Work-around surprisingly expensive add-on live-ness join when fetching alerts and instead filter by content_type
• Fix some bad index selection for newer MariaDB/MySQL versions for various parts of the add-on
• Fix some bad performance when using the 'unsummarize' feature
• Fix bad links for profile-post summary alerts
• Fix formatting of alert summarization threshold option not being a numberbox
• Fix summary alerts could have a "G" as the user avatar for alerts which aren't attributed to a user
• Style compatibility fix where the day-selector on the alerts page could be forced onto a new line
• Rework alert summarization feature to be more performant and use less memory
• Rework alert preferences
  • Cleanup various phrasing and add more explainer text to hopefully be less confusing
  • Add "Alerting preference defaults" option
  • Add simplified interface for alert preferences (no alerts, use defaults, use custom).
  • Add per-alert "Alert bell read" option to alert preferences which allows setting if each individual alert is mark-as-read when viewed in the alerts pop-up
• Add support for summarizing XFMG reactions alerts
• Add support for summarizing post quotes alerts
• Add support for summarizing user followed alerts

• Fix "Alerts pop-up skips mark read" and "Alerts page skips summarizing" user-options did not save as expected
• Fix "Alert resummarize flood check" global option didn't allow selecting 0 to disable it

• Fix regression in v2.9.0 where empty content summary alerts was being generated, and incorrectly preferring a per-user summary instead
• Fix that editing alert preferences when summarization is disabled, would disable some summarization options

• Require Standard Library by Xon v1.18.0+
• Fix alert summarizing only triggered on +25 unread alerts instead of the user-defined threshold
• Fix summary alerts in the alert pop-up would be pushed under the just read alerts as if it had been read a while ago
• Adjust "Alert summarize limit" option description text to better describe what a limit of 0 does (ie no limit)

• Fix "Alert summarization" option being disabled still showed user's preference options to configure it

• Require php 7.2+
• Require XenForo 2.2+, remove XF2.1 support
• Fix sticky unread alerts could unexpectedly occur due to (effectively undocumented) 'auto read' functionality in XF2.2
• Fix confusion over view_date vs read_date not being correctly used in the expected places
• Fix alerts pop-up not respecting "Days to retain viewed alerts in popup" option in all cases
• Fix 'mark read' functionality could result in inconsistent view/read date for older alerts near the expiry period
• Fix unstaller not correctly removing columns added to xf_user_option
• Fix alert summarization/grouping may not trigger when expected
• Ensure xf_user_alert.summerize_id column has the same column size as xf_user_alert.alert_id. If alert_id has been to a bigint, this may be an expensive operation;
  
  SQL:

  alter table xf_user_alert modify column summerize_id bigint unsigned  default null;

  
  
• Use index hints to control poor index selection on some installs
• Attempt to improve unviewed alert cleanup which can have issues when dealing with very large number of alerts
• Improve UI.X compatibility
• In Alerts pop-up, do not prevent marking alerts as recently read when they are read in that request
• Add various styling options to control alerts styling
• Add styling option to control if just-read-alerts from the alerts pop-up are styled as read or unread, and if to fade from unread to read.
• Visiting the full alerts page no longer marks alerts as read by default, and removes the relevant per-user option ("Alerts page skips mark read").
• Display an font-awesome icon (star with exclamation) on alerts which are unread with auto-read off, rather than a star for recent-ish alerts. With more correct hint text on both

• Another attempt to reduce deadlocks during alert pruning
• When editing a post, mark related alerts as read, as this displays changes in post contents to the visitor
• If Live Content add-on is installed; only try to mark alerts as read if the visitor has unread alerts

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V2.8.20