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418 lines
16 KiB
ReStructuredText
Push Notifications
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==================
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Pushers
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-------
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To receive any notification pokes at all, it is necessary to configure a
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'pusher' on the Home Server that you wish to receive notifications from. There
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is a single API endpoint for this::
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POST $PREFIX/pushers/set
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This takes a JSON object with the following keys:
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pushkey
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This is a unique identifier for this pusher. The value you should use for this
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is the routing or destination address information for the notification, for
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example, the APNS token for APNS or the Registration ID for GCM. If your
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notification client has no such concept, use any unique identifier.
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kind
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The kind of pusher to configure. 'http' makes a pusher that sends HTTP pokes.
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null deletes the pusher.
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profile_tag
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This is a string that determines what set of device rules will be matched when
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evaluating push rules for this pusher. It is an arbitrary string. Multiple
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devices maybe use the same profile_tag. It is advised that when an app's
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data is copied or restored to a different device, this value remain the same.
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Client apps should offer ways to change the profile_tag, optionally copying
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rules from the old profile tag. Max length, 32 bytes.
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app_id
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appId is a reverse-DNS style identifier for the application. It is recommended
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that this end with the platform, such that different platform versions get
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different app identifiers. Max length, 64 chars.
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app_display_name
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A string that will allow the user to identify what application owns this
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pusher.
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device_display_name
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A string that will allow the user to identify what device owns this pusher.
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lang
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The preferred language for receiving notifications (eg, 'en' or 'en-US')
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data
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A dictionary of information for the pusher implementation itself. For HTTP
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pushers, this must contain a 'url' key which is a string of the URL that
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should be used to send notifications.
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If the pusher was created successfully, a JSON dictionary is returned (which may
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be empty).
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Push Rules
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----------
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Home Servers have an interface to configure what events trigger notifications.
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This behaviour is configured through 'Push Rules'. Push Rules come in a variety
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of different kinds and each kind of rule has an associated priority. The
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different kinds of rule, in descending order of priority, are:
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Override Rules
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The highest priority rules are user-configured overrides.
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Content Rules
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These configure behaviour for (unencrypted) messages that match certain
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patterns. Content rules take one parameter, 'pattern', that gives the pattern
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to match against. This is treated in the same way as pattern for event_match
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conditions, below.
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Room Rules
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These change the behaviour of all messages to a given room. The rule_id of a
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room rule is always the ID of the room that it affects.
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Sender
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These rules configure notification behaviour for messages from a specific,
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named Matrix user ID. The rule_id of Sender rules is always the Matrix user
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ID of the user whose messages theyt apply to.
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Underride
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These are identical to override rules, but have a lower priority than content,
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room and sender rules.
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In addition, each kind of rule may be either global or device-specific. Device
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specific rules only affect delivery of notifications via pushers with a matching
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profile_tag. All device-specific rules are higher priority than all global
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rules. Thusly, the full list of rule kinds, in descending priority order, is as
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follows:
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* Device-specific Override
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* Device-specific Content
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* Device-specific Room
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* Device-specific Sender
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* Device-specific Underride
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* Global Override
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* Global Content
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* Global Room
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* Global Sender
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* Global Underride
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For some kinds of rule, rules of the same kind also have an ordering with
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respect to one another. The kinds that do not are room and sender rules where
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the rules are mutually exclusive by definition and therefore an ordering would
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be redundant. Actions for the highest priority rule and only that rule apply
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(for example, a set_tweak action in a lower priority rule will not apply if a
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higher priority rule matches, even if that rule does not specify any tweaks).
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Rules also have an identifier, rule_id, which is a string. The rule_id is
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unique within the kind of rule and scope: rule_ids need not be unique between
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rules of the same kind on different devices.
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A home server may also have server default rules of each kind and in each scope.
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Server default rules are lower priority than user-defined rules in each scope.
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Server default rules (and only server default rules) begin with a dot ('.')
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character.
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In addition, all rules may be enabled or disabled. Disabled rules never match.
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If no rules match an event, the Home Server should not notify for the message
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(that is to say, the default action is "dont-notify"). Events that the user sent
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themself are never alerted for.
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Predefined Rules
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----------------
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Matrix specifies the following rule IDs for server default rules. Home Servers
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may define rules as follows with the given IDs. If Home Servers provide rules
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with these IDs, their semantics should match those given below:
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.m.rule.contains_user_name
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Matches any message whose content is unencrypted and contains the local part
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of the user's Matrix ID, separated by word boundaries.
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Definition (as a content rule)::
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{
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"rule_id": ".m.rule.contains_user_name"
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"pattern": "[the lcoal part of the user's Matrix ID]",
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"actions": [
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"notify",
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{
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"set_tweak": "sound",
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"value": "default"
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}
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],
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}
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.m.rule.contains_display_name
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Matches any message whose content is unencrypted and contains the user's
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current display name in the room in which it was sent.
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Definition (this rule can only be an override or underride rule)::
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{
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"rule_id": ".m.rule.contains_display_name"
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"conditions": [
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{
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"kind": "contains_display_name"
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}
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],
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"actions": [
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"notify",
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{
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"set_tweak": "sound",
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"value": "default"
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}
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],
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}
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.m.rule.room_one_to_one
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Matches any message sent in a room with exactly two members.
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Definition (this rule can only be an override or underride rule)::
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{
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"rule_id": ".m.rule.room_two_members"
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"conditions": [
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{
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"is": "2",
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"kind": "room_member_count"
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}
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],
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"actions": [
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"notify",
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{
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"set_tweak": "sound",
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"value": "default"
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}
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],
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}
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.m.rule.suppress_notices
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Matches messages with 'msgtype' of 'notice'. This should be an override rule
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such that, when enabled, it takes priority over content / sender / room rules.
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Definition::
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{
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'rule_id': '.m.rule.suppress_notices',
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'conditions': [
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{
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'kind': 'event_match',
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'key': 'content.msgtype',
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'pattern': 'm.notice',
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}
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],
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'actions': [
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'dont-notify',
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]
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}
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.m.rule.fallback
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Matches any message. Used to define the behaviour of messages that match no
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other rules. Therefore, if Home Servers define this, it should be the lowest
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priority underride rule.
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Definition::
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{
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"rule_id": ".m.rule.fallback"
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"conditions": [],
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"actions": [
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"notify"
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],
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}
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Push Rules: Actions:
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--------------------
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All rules have an associated list of 'actions'. An action affects if and how a
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notification is delievered for a matching event. This standard defines the
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following actions, although if Home servers wish to support more, they are free
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to do so:
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notify
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This causes each matching event to generate a notification.
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dont_notify
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Prevents this event from generating a notification
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coalesce
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This enables notifications for matching events but activates Home Server
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specific behaviour to intelligently coalesce multiple events into a single
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notification. Not all Home Servers may support this. Those that do not should
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treat it as the 'notify' action.
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set_tweak
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Sets an entry in the 'tweaks' dictionary key that is sent in the notification
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poke. This takes the form of a dictionary with a 'set_tweak' key whose value
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is the name of the tweak to set. It must also have a 'value' key which is
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the value to which it should be set.
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Actions that have no parameters are represented as a string. Otherwise, they are
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represented as a dictionary with a key equal to their name and other keys as
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their parameters, eg. { "set_tweak": "sound", "value": "default" }
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Push Rule Actions: Tweaks
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-------------------------
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The 'set_tweak' key action is used to add an entry to the 'tweaks' dictionary
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that is sent in the notification poke. The following tweaks are defined:
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sound
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A sound to be played when this notification arrives. 'default' means to
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play a default sound.
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highlight
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Whether or not this message should be highlighted in the UI. This will
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normally take the form of presenting the message in a different colour and/or
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weight. The UI might also be adjusted to draw particular attention to the room
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in which the event occurred. The value may be omitted from the highlight
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tweak, in which case it should be read as if it had a value of true.
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Tweaks are passed transparently through the Home Server so client applications
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and push gateways may agree on additional tweaks, for example, how to flash the
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notification light on a mobile device.
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If a kind of tweak that a client understands is not specified in an action, the
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client may choose a sensible behaviour for the tweak.
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Push Rules: Conditions:
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-----------------------
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Override, Underride and Default rules have a list of 'conditions'. All
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conditions must hold true for an event in order for a rule to be applied to an
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event. A rule with no conditions always matches. Matrix specifies the following
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conditions, although if Home Servers wish to support others, they are free to
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do so:
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event_match
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This is a glob pattern match on a field of the event. Parameters:
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* 'key': The dot-separated field of the event to match, eg. content.body
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* 'pattern': The glob-style pattern to match against. Patterns with no
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special glob characters should be treated as having asterisks
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prepended and appended when testing the condition.
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profile_tag
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Matches the profile_tag of the device that the notification would be
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delivered to. Parameters:
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* 'profile_tag': The profile_tag to match with.
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contains_display_name
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This matches unencrypted messages where content.body contains the owner's
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display name in that room. This is a separate rule because display names may
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change and as such it would be hard to maintain a rule that matched the user's
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display name. This condition has no parameters.
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room_member_count
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This matches the current number of members in the room.
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* 'is': A decimal integer optionally prefixed by one of, '==', '<', '>',
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'>=' or '<='. A prefix of '<' matches rooms where the member count is
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strictly less than the given number and so forth. If no prefix is present,
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this matches rooms where the member count is exactly equal to the given
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number (ie. the same as '==').
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Room, Sender, User and Content rules do not have conditions in the same way,
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but instead have predefined conditions, the behaviour of which can be configured
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using parameters named as described above. In the cases of room and sender
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rules, the rule_id of the rule determines its behaviour.
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Push Rules: API
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---------------
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Rules live under a hierarchy in the REST API that resembles::
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$PREFIX/pushrules/<scope>/<kind>/<rule_id>
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The component parts are as follows:
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scope
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Either 'global' or 'device/<profile_tag>' to specify global rules or
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device rules for the given profile_tag.
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kind
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The kind of rule, ie. 'override', 'underride', 'sender', 'room', 'content'.
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rule_id
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The identifier for the rule.
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To add or change a rule, a client performs a PUT request to the appropriate URL.
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When adding rules of a type that has an ordering, the client can add parameters
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that define the priority of the rule:
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before
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Use 'before' with a rule_id as its value to make the new rule the next-more
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important rule with respect to the given rule.
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after
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This makes the new rule the next-less important rule relative to the given
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rule.
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All requests to the push rules API also require an access_token as a query
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paraemter.
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The content of the PUT request is a JSON object with a list of actions under the
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'actions' key and either conditions (under the 'conditions' key) or the
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appropriate parameters for the rule (under the appropriate key name).
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Examples:
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To create a rule that suppresses notifications for the room with ID '!dj234r78wl45Gh4D:matrix.org'::
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curl -X PUT -H "Content-Type: application/json" -d '{ "actions" : ["dont_notify"] }' "http://localhost:8008/_matrix/client/api/v1/pushrules/global/room/%21dj234r78wl45Gh4D%3Amatrix.org?access_token=123456"
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To suppress notifications for the user '@spambot:matrix.org'::
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curl -X PUT -H "Content-Type: application/json" -d '{ "actions" : ["dont_notify"] }' "http://localhost:8008/_matrix/client/api/v1/pushrules/global/sender/%40spambot%3Amatrix.org?access_token=123456"
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To always notify for messages that contain the work 'cake' and set a specific sound (with a rule_id of 'SSByZWFsbHkgbGlrZSBjYWtl')::
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curl -X PUT -H "Content-Type: application/json" -d '{ "pattern": "cake", "actions" : ["notify", {"set_sound":"cakealarm.wav"}] }' "http://localhost:8008/_matrix/client/api/v1/pushrules/global/content/SSByZWFsbHkgbGlrZSBjYWtl?access_token=123456"
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To add a rule suppressing notifications for messages starting with 'cake' but ending with 'lie', superseeding the previous rule::
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curl -X PUT -H "Content-Type: application/json" -d '{ "pattern": "cake*lie", "actions" : ["notify"] }' "http://localhost:8008/_matrix/client/api/v1/pushrules/global/content/U3BvbmdlIGNha2UgaXMgYmVzdA?access_token=123456&before=SSByZWFsbHkgbGlrZSBjYWtl"
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To add a custom sound for notifications messages containing the word 'beer' in any rooms with 10 members or fewer (with greater importance than the room, sender and content rules)::
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curl -X PUT -H "Content-Type: application/json" -d '{ "conditions": [{"kind": "event_match", "key": "content.body", "pattern": "beer" }, {"kind": "room_member_count", "is": "<=10"}], "actions" : ["notify", {"set_sound":"beeroclock.wav"}] }' "http://localhost:8008/_matrix/client/api/v1/pushrules/global/override/U2VlIHlvdSBpbiBUaGUgRHVrZQ?access_token=123456
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To delete rules, a client would just make a DELETE request to the same URL::
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curl -X DELETE "http://localhost:8008/_matrix/client/api/v1/pushrules/global/room/%23spam%3Amatrix.org?access_token=123456"
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Retrieving the current ruleset can be done either by fetching individual rules
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using the scheme as specified above. This returns the rule in the same format as
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would be given in the PUT API with the addition of a rule_id::
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curl "http://localhost:8008/_matrix/client/api/v1/pushrules/global/room/%23spam%3Amatrix.org?access_token=123456"
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Returns::
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{
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"actions": [
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"dont_notify"
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],
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"rule_id": "#spam:matrix.org",
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"enabled": true
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}
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Clients can also fetch broader sets of rules by removing path components.
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Requesting the root level returns a structure as follows::
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{
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"device": {
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"exampledevice": {
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"content": [],
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"override": [],
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"room": [
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{
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"actions": [
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"dont_notify"
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],
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"rule_id": "#spam:matrix.org",
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"enabled", true
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}
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],
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"sender": [],
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"underride": []
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}
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},
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"global": {
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"content": [],
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"override": [],
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"room": [],
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"sender": [],
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"underride": []
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}
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}
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Adding patch components to the request drills down into this structure to filter
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to only the requested set of rules.
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Enabling and Disabling Rules
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----------------------------
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Rules can be enabled or disabled with a PUT operation to the 'enabled' component
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beneath the rule's URI with a content of 'true' or 'false'::
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curl -X PUT -H "Content-Type: application/json" -d 'false' "http://localhost:8008/_matrix/client/api/v1/pushrules/global/sender/%40spambot%3Amatrix.org/enabled?access_token=123456"
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