[CRM-20638] Add a hook to modify activity assignee email recipients - CiviCRM Issue Tracker

Details

Versioning Impact:
Minor (add functionality in backwards-compatible manner)
Documentation Required?:
Developer Doc
Funding Source:
Contributed Code
Verified?:
No
How it works currently:

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Activity assignees are sent an email of the activity, providing the 'Notify Activity Assignees' option is enabled.

Currently there is no way to modify the behaviour other than enable/disable.

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Activity assignees are sent an email of the activity, providing the 'Notify Activity Assignees' option is enabled. Currently there is no way to modify the behaviour other than enable/disable.
How it should work:
This creates a new hook hook_civicrm_activityMailRecipients() that enables extension developers to modify the list of recipients.
Acceptance Criteria:

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When hook_civicrm_activityMailRecipients() is implemented in an extension, check that activity assignment emails are as modified.

If the hook is not implemented there should be no change to current behaviour.

Note that this no effect unless the 'Notify Activity Assignees' option is enabled.

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When hook_civicrm_activityMailRecipients() is implemented in an extension, check that activity assignment emails are as modified. If the hook is not implemented there should be no change to current behaviour. Note that this no effect unless the 'Notify Activity Assignees' option is enabled.

Add a new hook to allow modification of the list of recipients receiving activity assignment emails. Use cases include:

don't send emails if the assignee is the activity source (person adding the activity) - they already know about this
don't send emails to assignees about selected activity types

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