|
|
|
|
@ -20,7 +20,7 @@ membership of a room.
|
|
|
|
|
A presence list is a list of user IDs whose presence the user wants to follow.
|
|
|
|
|
To be added to this list, the user being added must be invited by the list owner
|
|
|
|
|
who must accept the invitation.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
User's presence state is represented by the ``presence`` key, which is an enum
|
|
|
|
|
of one of the following:
|
|
|
|
|
|
|
|
|
|
@ -30,8 +30,6 @@ of one of the following:
|
|
|
|
|
idle.
|
|
|
|
|
- ``offline`` : The user is not connected to an event stream or is
|
|
|
|
|
explicitly suppressing their profile information from being sent.
|
|
|
|
|
- ``free_for_chat`` : The user is generally willing to receive messages
|
|
|
|
|
moreso than default.
|
|
|
|
|
|
|
|
|
|
Events
|
|
|
|
|
------
|
|
|
|
|
@ -46,67 +44,44 @@ listed below.
|
|
|
|
|
|
|
|
|
|
{{presence_cs_http_api}}
|
|
|
|
|
|
|
|
|
|
Idle timeout
|
|
|
|
|
~~~~~~~~~~~~
|
|
|
|
|
|
|
|
|
|
Clients SHOULD implement an "idle timeout". This is a timer which fires after
|
|
|
|
|
a period of inactivity on the client. The definition of inactivity varies
|
|
|
|
|
depending on the client. For example, web implementations may determine
|
|
|
|
|
inactivity to be not moving the mouse for a certain period of time. When this
|
|
|
|
|
timer fires it should set the presence state to ``unavailable``. When the user
|
|
|
|
|
becomes active again (e.g. by moving the mouse) the client should set the
|
|
|
|
|
presence state to ``online``. A timeout value between 1 and 5 minutes is
|
|
|
|
|
recommended.
|
|
|
|
|
|
|
|
|
|
Server behaviour
|
|
|
|
|
----------------
|
|
|
|
|
|
|
|
|
|
Each user's homeserver stores a "presence list" per user. Once a user accepts
|
|
|
|
|
a presence list, both user's HSes must track the subscription.
|
|
|
|
|
|
|
|
|
|
Propagating profile information
|
|
|
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
|
|
|
|
|
|
Because the profile display name and avatar information are likely to be used in
|
|
|
|
|
many places of a client's display, changes to these fields SHOULD cause an
|
|
|
|
|
automatic propagation event to occur, informing likely-interested parties of the
|
|
|
|
|
new values. One of these change mechanisms SHOULD be via ``m.presence`` events.
|
|
|
|
|
These events should set ``displayname`` and ``avatar_url`` to the new values
|
|
|
|
|
along with the presence-specific keys. This SHOULD be done automatically by the
|
|
|
|
|
homeserver when a user successfully changes their display name or avatar URL.
|
|
|
|
|
|
|
|
|
|
.. admonition:: Rationale
|
|
|
|
|
|
|
|
|
|
The intention for sending this information in ``m.presence`` is so that any
|
|
|
|
|
"user list" can display the *current* name/presence for a user ID outside the
|
|
|
|
|
scope of a room e.g. for a user page. This is bundled into a single event for
|
|
|
|
|
several reasons. The user's display name can change per room. This
|
|
|
|
|
event provides the "canonical" name for the user. In addition, the name is
|
|
|
|
|
bundled into a single event for the ease of client implementations. If this
|
|
|
|
|
was not done, the client would need to search all rooms for their own
|
|
|
|
|
membership event to pull out the display name.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Last active ago
|
|
|
|
|
~~~~~~~~~~~~~~~
|
|
|
|
|
The server maintains a timestamp of the last time it saw a
|
|
|
|
|
pro-active event from the user. A pro-active event may be sending a message to a
|
|
|
|
|
room or changing presence state to a higher level of availability. Levels of
|
|
|
|
|
availability are defined from low to high as follows:
|
|
|
|
|
The server maintains a timestamp of the last time it saw a pro-active event from
|
|
|
|
|
the user. A pro-active event may be sending a message to a room or changing
|
|
|
|
|
presence state to ``online``. This timestamp is presented via a key called
|
|
|
|
|
``last_active_ago`` which gives the relative number of milliseconds since the
|
|
|
|
|
pro-active event.
|
|
|
|
|
|
|
|
|
|
To reduce the number of presence updates sent to clients the server may include
|
|
|
|
|
a ``currently_active`` boolean field when the presence state is ``online``. When
|
|
|
|
|
true, the server will not send further updates to the last active time until an
|
|
|
|
|
update is sent to the client with either a) ``currently_active`` set to false or
|
|
|
|
|
b) a presence state other than ``online``. During this period clients must
|
|
|
|
|
consider the user to be currently active, irrespective of the last active time.
|
|
|
|
|
|
|
|
|
|
The last active time must be up to date whenever the server gives a presence
|
|
|
|
|
event to the client. The ``currently_active`` mechanism should purely be used by
|
|
|
|
|
servers to stop sending continuous presence updates, as opposed to disabling
|
|
|
|
|
last active tracking entirely. Thus clients can fetch up to date last active
|
|
|
|
|
times by explicitly requesting the presence for a given user.
|
|
|
|
|
|
|
|
|
|
- ``offline``
|
|
|
|
|
- ``unavailable``
|
|
|
|
|
- ``online``
|
|
|
|
|
- ``free_for_chat``
|
|
|
|
|
Idle timeout
|
|
|
|
|
~~~~~~~~~~~~
|
|
|
|
|
|
|
|
|
|
Based on this list, changing state from ``unavailable`` to ``online`` counts as
|
|
|
|
|
a pro-active event, whereas ``online`` to ``unavailable`` does not. This
|
|
|
|
|
timestamp is presented via a key called ``last_active_ago`` which gives the
|
|
|
|
|
relative number of milliseconds since the pro-active event.
|
|
|
|
|
The server will automatically set a user's presence to ``unavailable`` if their
|
|
|
|
|
last active time was over a threshold value (e.g. 5 minutes). Clients can
|
|
|
|
|
manually set a user's presence to ``unavailable``. Any activity that bumps the
|
|
|
|
|
last active time on any of the user's clients will cause the server to
|
|
|
|
|
automatically set their presence to ``online``.
|
|
|
|
|
|
|
|
|
|
Security considerations
|
|
|
|
|
-----------------------
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Presence information is shared with all users who share a room with the target
|
|
|
|
|
user. In large public rooms this could be undesirable.
|
|
|
|
|
|
|
|
|
|
|
Erik Johnston
9 years ago
committed by