If blocking will have no effect (ie. you are attempting to block
the admin) the 'Block' button will not be shown and instead a
message will be shown explaining why you can not block the user.
Instead of creating all the self-conversations during the upgrading,
some code has been added to the get_conversations and to the
get_conversation_counts to create it whe it doesn't exist.
Two modes of visibility checking are supported, depending on the value
of the 'messagingallusers' site setting (site-wide messaging):
- If site-wide messaging is enabled, a user may only be returned in
search results if the searching user can view their profile somewhere
(either the site profile or any course profile).
- If site-wide messaging is disabled, a user may only be returned in
search results if the searching user shares a course with them and can
view their course profile in the shared course.
Added new MESSAGE_CONVERSATION_TYPE_SELF type for self-conversations
and upgraded legacy self-conversations to the new type, removing
repeated members in the message_conversation_members table.
Besides, from now, a self-conversation will be created by default for
all the existing users.
All the self-conversations have been also starred and a default message
will be displayed always to explain how to use them.
Conversation name and subname should support filters, so the data should
be passed through format_string, and advertised in the external params
as PARAM_TEXT.
Those individual conversations created with one's self (via admin user
bulk actions) are now supported in get_conversations(). These had two
records with the same userid in the message_conversation_members table.
The following adjustments have been made to accomodate these:
- Member count adjusted to read 1, not 2 for 'self' conversations.
- Member information for the current user now returned for 'self'
conversations.
- The method now tracks 'self' conversations via $selfconversations.
Individual conversations with a soft-deleted user (including messages)
are now displayed in the conversation listing. This brings the behaviour
of individual conversations in line with group conversations, in that
the active user can still view messages.
