Remove scheduled events upon deactivation or uninstall

[jamesozzie]

Bug Description

As suggested by a user in the forums, consider allowing users to remove any cron events upon via a hook, or an option to remove such events upon uninstall or deactivation.

The cron event highlighted by the user is googlesitekit_cron_update_remote_features

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Do not alter or remove anything below. The following sections will be managed by moderators only.

Acceptance criteria

• All Site Kit cron events and schedules should be cleared on:
  • Site Kit Reset
  • Plugin deactivation
  • Plugin uninstall

Implementation Brief

• [x] Following events need to be cleared (these are present at the time of writing, check if there are new ones during execution):
  • OAuth_Client::CRON_REFRESH_PROFILE_DATA
  • Remote_Features_Cron:CRON_ACTION
  • Synchronize_AdSenseLinked::CRON_SYNCHRONIZE_ADSENSE_LINKED
  • Synchronize_AdsLinked:CRON_SYNCHRONIZE_ADS_LINKED
  • Synchronize_Property:CRON_SYNCHRONIZE_PROPERTY
• [x] Update includes/Core/Util/Uninstallation.php
  • In register method, hook into googlesitekit_deactivation and googlesitekit_reset and remove all listed CRON events. You can use wp_clear_scheduled_hook.
  • Extract the CRON cleanup logic in a new method and call it as callback in both hooks. And invoke it in the existing googlesitekit_uninstallation hook as well

Test Coverage

• No updates needed

QA Brief

1. Turn on the conversionReporting feature flag (as that includes one of the cron events).
2. Set up Site Kit with the Analytics, Ads, and AdSense modules.
3. Install & activate the WP Crontrol plugin.
4. Go to "WordPress Dashboard -> Tools -> Cron Events" and search for "googlesitekit".
5. You should be able to see some events from the Site Kit plugin here.
6. Now, try deactivating, deleting, or resetting Site Kit.
7. Perform step 4 again and verify that there are no Site Kit events.

Changelog entry

• Remove scheduled events upon deactivation, reset or uninstall.

[jamesozzie]

@aaemnnosttv tagging you here for visibility.

[ivonac4]

@aaemnnosttv Are you still planning to work on this soon? If not, could you please unassign yourself so someone else can pick it up? Thank you!

[aaemnnosttv]

Closing in favor of #8988

[webd-uk]

I will comment on #8988 as well but I do not agree that this should be closed in favour of that issue.

As per WordPress WP Cron recommendations, tasks should be unscheduled when they are no-longer required and doing so on a deactivation hook (as recommended by WordPress) cannot have a detrimental effect because the plugin is no longer active!

Should the plugin be re-activated, the missing / required tasks will be added again by the plugin anyway.

[aaemnnosttv]

Thanks @webd-uk, I agree, this issue is still valid 👍

[eugene-manuilov]

Update google-site-kit.php

• Include register_uninstall_hook function, and re-use the googlesitekit_deactivate_plugin as callback. You can invoke this function bellow the register_deactivation_hook, since uninstalling and deactivating can share the same cleanup logic.

@zutigrm it should be done in the includes/Core/Util/Uninstallation.php file.

Update Google\Site_Kit\Plugin::register:

• Hook into googlesitekit_deactivation and googlesitekit_reset and remove all listed CRON events.

The same here, we should do it in the Uninstallation class.

[zutigrm]

@eugene-manuilov Thanks! Didn't see we have that file. IB Updated

[eugene-manuilov]

Thanks. IB ✔️