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.. Copyright 2016 OpenMarket Ltd
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..
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.. Licensed under the Apache License, Version 2.0 (the "License");
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.. you may not use this file except in compliance with the License.
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.. You may obtain a copy of the License at
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..
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.. http://www.apache.org/licenses/LICENSE-2.0
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..
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.. Unless required by applicable law or agreed to in writing, software
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.. distributed under the License is distributed on an "AS IS" BASIS,
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.. WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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.. See the License for the specific language governing permissions and
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.. limitations under the License.
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Direct Messaging
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================
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.. _module:dm:
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All communication over Matrix happens within a room. It is sometimes
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desirable to offer users the concept of speaking directly to one
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particular person. This module defines a way of marking certain rooms
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as 'direct chats' with a given person. This does not restrict the chat
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to being between exactly two people since this would preclude the
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presence of automated 'bot' users or even a 'personal assistant' who is
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able to answer direct messages on behalf of the user in their absence.
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A room may not necessarily be considered 'direct' by all members of the
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room, but a signalling mechanism exists to propagate the information of
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whether a chat is 'direct' to an invitee.
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Events
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------
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{{m_direct_event}}
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Client behaviour
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----------------
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The invitee's client may use the ``is_direct`` flag in `m.room.member`_ to
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automatically mark the room as a direct message but this is not required: it
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may for example, prompt the user, ignore the flag altogether. To do this, it
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stores this event in account data using the ``account_data`` API: see `Client
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Config`_.
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The inviter's client should set the ``is_direct`` flag to .. |/createRoom|_
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whenever the flow the user has followed is one where their
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intention is to speak directly with another person, as opposed to bringing that
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person in to a shared room. For example, clicking on, 'Start Chat' beside a
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person's profile picture would imply the ``is_direct`` flag should be set.
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Server behaviour
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----------------
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When the ``is_direct`` flag is given to .. |/createRoom|_, the home
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server must set the ``is_direct`` flag in the invite member event for any users
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invited in the ``createRoom`` call.
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