Also deprecated the following functions -
1. message_move_userfrom_unread2read - It is not necessary
for us to mark a message as read on user deletion.
2. message_get_blocked_users - Horrible logic used to
determine if a user is blocked via reference on some
randomly chosen 'isblocked' variable.
3. message_get_contacts - The same as above. This can be
done in a much nicer way.
4. message_mark_message_read - We want two functions to do
this to avoid confusing messages and notifications.
5. message_can_delete_message - This assumed the variable
$message contained the 'useridto' property, which
was present in the old table structure. We do not want
future usages where a query is done on the new table
and is simply passed as this won't contain this property.
6. message_delete_message - Same as above.
This change considers all existing search areas in Moodle and makes
necessary changes.
Custom change to course search, supported by helper in base.php:
* course/classes/search/mycourse.php
Custom change to message search:
* message/classes/search/message_received.php
* message/classes/search/message_sent.php
Custom change to user search:
* user/classes/search/user.php
Custom changes to module areas, supported by helper in base_mod.php:
* mod/book/classes/search/chapter.php
* mod/data/classes/search/entry.php
* mod/forum/classes/search/post.php
* mod/glossary/classes/search/entry.php
* mod/survey/classes/search/activity.php
* mod/wiki/classes/search/collaborative_page.php
(Note: the unit tests do not exhaustively check every context type
for these, given that's mainly handled by the helper function
which was already tested in the base_activity test.)
Handled by block base class (no change):
* blocks/html/classes/search/content.php
Handled by activity base class (no change):
* mod/assign/classes/search/activity.php
* mod/book/classes/search/activity.php
* mod/chat/classes/search/activity.php
* mod/choice/classes/search/activity.php
* mod/data/classes/search/activity.php
* mod/feedback/classes/search/activity.php
* mod/folder/classes/search/activity.php
* mod/forum/classes/search/activity.php
* mod/glossary/classes/search/activity.php
* mod/imscp/classes/search/activity.php
* mod/label/classes/search/activity.php
* mod/lesson/classes/search/activity.php
* mod/lti/classes/search/activity.php
* mod/page/classes/search/activity.php
* mod/quiz/classes/search/activity.php
* mod/resource/classes/search/activity.php
* mod/scorm/classes/search/activity.php
* mod/url/classes/search/activity.php
* mod/wiki/classes/search/activity.php
* mod/workshop/classes/search/activity.php
Make indexing of user messages tolerant to user deletion.
When creating the search document for user messages,
add a check to see if the user has been deleted in the
system. If they have been deleted abort creating the search
document.
This is to avoid rasining an error when trying to get the
user context for a deleted user.
