diff --git a/synapse/push/baserules.py b/synapse/push/baserules.py
index 6c0cc5a6ce..440205e80c 100644
--- a/synapse/push/baserules.py
+++ b/synapse/push/baserules.py
@@ -14,128 +14,235 @@
# See the License for the specific language governing permissions and
# limitations under the License.
-import copy
-from typing import Any, Dict, List
-
-from synapse.push.rulekinds import PRIORITY_CLASS_INVERSE_MAP, PRIORITY_CLASS_MAP
+"""
+Push rules is the system used to determine which events trigger a push (and a
+bump in notification counts).
+
+This consists of a list of "push rules" for each user, where a push rule is a
+pair of "conditions" and "actions". When a user receives an event Synapse
+iterates over the list of push rules until it finds one where all the conditions
+match the event, at which point "actions" describe the outcome (e.g. notify,
+highlight, etc).
+
+Push rules are split up into 5 different "kinds" (aka "priority classes"), which
+are run in order:
+ 1. Override — highest priority rules, e.g. always ignore notices
+ 2. Content — content specific rules, e.g. @ notifications
+ 3. Room — per room rules, e.g. enable/disable notifications for all messages
+ in a room
+ 4. Sender — per sender rules, e.g. never notify for messages from a given
+ user
+ 5. Underride — the lowest priority "default" rules, e.g. notify for every
+ message.
+
+The set of "base rules" are the list of rules that every user has by default. A
+user can modify their copy of the push rules in one of three ways:
+
+ 1. Adding a new push rule of a certain kind
+ 2. Changing the actions of a base rule
+ 3. Enabling/disabling a base rule.
+
+The base rules are split into whether they come before or after a particular
+kind, so the order of push rule evaluation would be: base rules for before
+"override" kind, user defined "override" rules, base rules after "override"
+kind, etc, etc.
+"""
+
+import itertools
+import logging
+from typing import Dict, Iterator, List, Mapping, Sequence, Tuple, Union
+
+import attr
+
+from synapse.config.experimental import ExperimentalConfig
+from synapse.push.rulekinds import PRIORITY_CLASS_MAP
+
+logger = logging.getLogger(__name__)
+
+
+@attr.s(auto_attribs=True, slots=True, frozen=True)
+class PushRule:
+ """A push rule
+
+ Attributes:
+ rule_id: a unique ID for this rule
+ priority_class: what "kind" of push rule this is (see
+ `PRIORITY_CLASS_MAP` for mapping between int and kind)
+ conditions: the sequence of conditions that all need to match
+ actions: the actions to apply if all conditions are met
+ default: is this a base rule?
+ default_enabled: is this enabled by default?
+ """
+ rule_id: str
+ priority_class: int
+ conditions: Sequence[Mapping[str, str]]
+ actions: Sequence[Union[str, Mapping]]
+ default: bool = False
+ default_enabled: bool = True
-def list_with_base_rules(rawrules: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
- """Combine the list of rules set by the user with the default push rules
- Args:
- rawrules: The rules the user has modified or set.
+@attr.s(auto_attribs=True, slots=True, frozen=True, weakref_slot=False)
+class PushRules:
+ """A collection of push rules for an account.
- Returns:
- A new list with the rules set by the user combined with the defaults.
+ Can be iterated over, producing push rules in priority order.
"""
- ruleslist = []
- # Grab the base rules that the user has modified.
- # The modified base rules have a priority_class of -1.
- modified_base_rules = {r["rule_id"]: r for r in rawrules if r["priority_class"] < 0}
+ # A mapping from rule ID to push rule that overrides a base rule. These will
+ # be returned instead of the base rule.
+ overriden_base_rules: Dict[str, PushRule] = attr.Factory(dict)
+
+ # The following stores the custom push rules at each priority class.
+ #
+ # We keep these separate (rather than combining into one big list) to avoid
+ # copying the base rules around all the time.
+ override: List[PushRule] = attr.Factory(list)
+ content: List[PushRule] = attr.Factory(list)
+ room: List[PushRule] = attr.Factory(list)
+ sender: List[PushRule] = attr.Factory(list)
+ underride: List[PushRule] = attr.Factory(list)
+
+ def __iter__(self) -> Iterator[PushRule]:
+ # When iterating over the push rules we need to return the base rules
+ # interspersed at the correct spots.
+ for rule in itertools.chain(
+ BASE_PREPEND_OVERRIDE_RULES,
+ self.override,
+ BASE_APPEND_OVERRIDE_RULES,
+ self.content,
+ BASE_APPEND_CONTENT_RULES,
+ self.room,
+ self.sender,
+ self.underride,
+ BASE_APPEND_UNDERRIDE_RULES,
+ ):
+ # Check if a base rule has been overriden by a custom rule. If so
+ # return that instead.
+ override_rule = self.overriden_base_rules.get(rule.rule_id)
+ if override_rule:
+ yield override_rule
+ else:
+ yield rule
+
+ def __len__(self) -> int:
+ # The length is mostly used by caches to get a sense of "size" / amount
+ # of memory this object is using, so we only count the number of custom
+ # rules.
+ return (
+ len(self.overriden_base_rules)
+ + len(self.override)
+ + len(self.content)
+ + len(self.room)
+ + len(self.sender)
+ + len(self.underride)
+ )
- # Remove the modified base rules from the list, They'll be added back
- # in the default positions in the list.
- rawrules = [r for r in rawrules if r["priority_class"] >= 0]
- # shove the server default rules for each kind onto the end of each
- current_prio_class = list(PRIORITY_CLASS_INVERSE_MAP)[-1]
+@attr.s(auto_attribs=True, slots=True, frozen=True, weakref_slot=False)
+class FilteredPushRules:
+ """A wrapper around `PushRules` that filters out disabled experimental push
+ rules, and includes the "enabled" state for each rule when iterated over.
+ """
- ruleslist.extend(
- make_base_prepend_rules(
- PRIORITY_CLASS_INVERSE_MAP[current_prio_class], modified_base_rules
- )
- )
+ push_rules: PushRules
+ enabled_map: Dict[str, bool]
+ experimental_config: ExperimentalConfig
- for r in rawrules:
- if r["priority_class"] < current_prio_class:
- while r["priority_class"] < current_prio_class:
- ruleslist.extend(
- make_base_append_rules(
- PRIORITY_CLASS_INVERSE_MAP[current_prio_class],
- modified_base_rules,
- )
- )
- current_prio_class -= 1
- if current_prio_class > 0:
- ruleslist.extend(
- make_base_prepend_rules(
- PRIORITY_CLASS_INVERSE_MAP[current_prio_class],
- modified_base_rules,
- )
- )
-
- ruleslist.append(r)
-
- while current_prio_class > 0:
- ruleslist.extend(
- make_base_append_rules(
- PRIORITY_CLASS_INVERSE_MAP[current_prio_class], modified_base_rules
- )
- )
- current_prio_class -= 1
- if current_prio_class > 0:
- ruleslist.extend(
- make_base_prepend_rules(
- PRIORITY_CLASS_INVERSE_MAP[current_prio_class], modified_base_rules
- )
- )
+ def __iter__(self) -> Iterator[Tuple[PushRule, bool]]:
+ for rule in self.push_rules:
+ if not _is_experimental_rule_enabled(
+ rule.rule_id, self.experimental_config
+ ):
+ continue
- return ruleslist
+ enabled = self.enabled_map.get(rule.rule_id, rule.default_enabled)
+ yield rule, enabled
-def make_base_append_rules(
- kind: str, modified_base_rules: Dict[str, Dict[str, Any]]
-) -> List[Dict[str, Any]]:
- rules = []
+ def __len__(self) -> int:
+ return len(self.push_rules)
- if kind == "override":
- rules = BASE_APPEND_OVERRIDE_RULES
- elif kind == "underride":
- rules = BASE_APPEND_UNDERRIDE_RULES
- elif kind == "content":
- rules = BASE_APPEND_CONTENT_RULES
- # Copy the rules before modifying them
- rules = copy.deepcopy(rules)
- for r in rules:
- # Only modify the actions, keep the conditions the same.
- assert isinstance(r["rule_id"], str)
- modified = modified_base_rules.get(r["rule_id"])
- if modified:
- r["actions"] = modified["actions"]
+DEFAULT_EMPTY_PUSH_RULES = PushRules()
- return rules
+def compile_push_rules(rawrules: List[PushRule]) -> PushRules:
+ """Given a set of custom push rules return a `PushRules` instance (which
+ includes the base rules).
+ """
+
+ if not rawrules:
+ # Fast path to avoid allocating empty lists when there are no custom
+ # rules for the user.
+ return DEFAULT_EMPTY_PUSH_RULES
+
+ rules = PushRules()
-def make_base_prepend_rules(
- kind: str,
- modified_base_rules: Dict[str, Dict[str, Any]],
-) -> List[Dict[str, Any]]:
- rules = []
+ for rule in rawrules:
+ # We need to decide which bucket each custom push rule goes into.
- if kind == "override":
- rules = BASE_PREPEND_OVERRIDE_RULES
+ # If it has the same ID as a base rule then it overrides that...
+ overriden_base_rule = BASE_RULES_BY_ID.get(rule.rule_id)
+ if overriden_base_rule:
+ rules.overriden_base_rules[rule.rule_id] = attr.evolve(
+ overriden_base_rule, actions=rule.actions
+ )
+ continue
+
+ # ... otherwise it gets added to the appropriate priority class bucket
+ collection: List[PushRule]
+ if rule.priority_class == 5:
+ collection = rules.override
+ elif rule.priority_class == 4:
+ collection = rules.content
+ elif rule.priority_class == 3:
+ collection = rules.room
+ elif rule.priority_class == 2:
+ collection = rules.sender
+ elif rule.priority_class == 1:
+ collection = rules.underride
+ elif rule.priority_class <= 0:
+ logger.info(
+ "Got rule with priority class less than zero, but doesn't override a base rule: %s",
+ rule,
+ )
+ continue
+ else:
+ # We log and continue here so as not to break event sending
+ logger.error("Unknown priority class: %", rule.priority_class)
+ continue
- # Copy the rules before modifying them
- rules = copy.deepcopy(rules)
- for r in rules:
- # Only modify the actions, keep the conditions the same.
- assert isinstance(r["rule_id"], str)
- modified = modified_base_rules.get(r["rule_id"])
- if modified:
- r["actions"] = modified["actions"]
+ collection.append(rule)
return rules
-# We have to annotate these types, otherwise mypy infers them as
-# `List[Dict[str, Sequence[Collection[str]]]]`.
-BASE_APPEND_CONTENT_RULES: List[Dict[str, Any]] = [
- {
- "rule_id": "global/content/.m.rule.contains_user_name",
- "conditions": [
+def _is_experimental_rule_enabled(
+ rule_id: str, experimental_config: ExperimentalConfig
+) -> bool:
+ """Used by `FilteredPushRules` to filter out experimental rules when they
+ have not been enabled.
+ """
+ if (
+ rule_id == "global/override/.org.matrix.msc3786.rule.room.server_acl"
+ and not experimental_config.msc3786_enabled
+ ):
+ return False
+ if (
+ rule_id == "global/underride/.org.matrix.msc3772.thread_reply"
+ and not experimental_config.msc3772_enabled
+ ):
+ return False
+ return True
+
+
+BASE_APPEND_CONTENT_RULES = [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["content"],
+ rule_id="global/content/.m.rule.contains_user_name",
+ conditions=[
{
"kind": "event_match",
"key": "content.body",
@@ -143,29 +250,33 @@ BASE_APPEND_CONTENT_RULES: List[Dict[str, Any]] = [
"pattern_type": "user_localpart",
}
],
- "actions": [
+ actions=[
"notify",
{"set_tweak": "sound", "value": "default"},
{"set_tweak": "highlight"},
],
- }
+ )
]
-BASE_PREPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
- {
- "rule_id": "global/override/.m.rule.master",
- "enabled": False,
- "conditions": [],
- "actions": ["dont_notify"],
- }
+BASE_PREPEND_OVERRIDE_RULES = [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.m.rule.master",
+ default_enabled=False,
+ conditions=[],
+ actions=["dont_notify"],
+ )
]
-BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
- {
- "rule_id": "global/override/.m.rule.suppress_notices",
- "conditions": [
+BASE_APPEND_OVERRIDE_RULES = [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.m.rule.suppress_notices",
+ conditions=[
{
"kind": "event_match",
"key": "content.msgtype",
@@ -173,13 +284,15 @@ BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_suppress_notices",
}
],
- "actions": ["dont_notify"],
- },
+ actions=["dont_notify"],
+ ),
# NB. .m.rule.invite_for_me must be higher prio than .m.rule.member_event
# otherwise invites will be matched by .m.rule.member_event
- {
- "rule_id": "global/override/.m.rule.invite_for_me",
- "conditions": [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.m.rule.invite_for_me",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -195,21 +308,23 @@ BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
# Match the requester's MXID.
{"kind": "event_match", "key": "state_key", "pattern_type": "user_id"},
],
- "actions": [
+ actions=[
"notify",
{"set_tweak": "sound", "value": "default"},
{"set_tweak": "highlight", "value": False},
],
- },
+ ),
# Will we sometimes want to know about people joining and leaving?
# Perhaps: if so, this could be expanded upon. Seems the most usual case
# is that we don't though. We add this override rule so that even if
# the room rule is set to notify, we don't get notifications about
# join/leave/avatar/displayname events.
# See also: https://matrix.org/jira/browse/SYN-607
- {
- "rule_id": "global/override/.m.rule.member_event",
- "conditions": [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.m.rule.member_event",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -217,24 +332,28 @@ BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_member",
}
],
- "actions": ["dont_notify"],
- },
+ actions=["dont_notify"],
+ ),
# This was changed from underride to override so it's closer in priority
# to the content rules where the user name highlight rule lives. This
# way a room rule is lower priority than both but a custom override rule
# is higher priority than both.
- {
- "rule_id": "global/override/.m.rule.contains_display_name",
- "conditions": [{"kind": "contains_display_name"}],
- "actions": [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.m.rule.contains_display_name",
+ conditions=[{"kind": "contains_display_name"}],
+ actions=[
"notify",
{"set_tweak": "sound", "value": "default"},
{"set_tweak": "highlight"},
],
- },
- {
- "rule_id": "global/override/.m.rule.roomnotif",
- "conditions": [
+ ),
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.m.rule.roomnotif",
+ conditions=[
{
"kind": "event_match",
"key": "content.body",
@@ -247,11 +366,13 @@ BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_roomnotif_pl",
},
],
- "actions": ["notify", {"set_tweak": "highlight", "value": True}],
- },
- {
- "rule_id": "global/override/.m.rule.tombstone",
- "conditions": [
+ actions=["notify", {"set_tweak": "highlight", "value": True}],
+ ),
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.m.rule.tombstone",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -265,11 +386,13 @@ BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_tombstone_statekey",
},
],
- "actions": ["notify", {"set_tweak": "highlight", "value": True}],
- },
- {
- "rule_id": "global/override/.m.rule.reaction",
- "conditions": [
+ actions=["notify", {"set_tweak": "highlight", "value": True}],
+ ),
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.m.rule.reaction",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -277,14 +400,16 @@ BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_reaction",
}
],
- "actions": ["dont_notify"],
- },
+ actions=["dont_notify"],
+ ),
# XXX: This is an experimental rule that is only enabled if msc3786_enabled
# is enabled, if it is not the rule gets filtered out in _load_rules() in
# PushRulesWorkerStore
- {
- "rule_id": "global/override/.org.matrix.msc3786.rule.room.server_acl",
- "conditions": [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["override"],
+ rule_id="global/override/.org.matrix.msc3786.rule.room.server_acl",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -298,15 +423,17 @@ BASE_APPEND_OVERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_room_server_acl_state_key",
},
],
- "actions": [],
- },
+ actions=[],
+ ),
]
-BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
- {
- "rule_id": "global/underride/.m.rule.call",
- "conditions": [
+BASE_APPEND_UNDERRIDE_RULES = [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["underride"],
+ rule_id="global/underride/.m.rule.call",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -314,17 +441,19 @@ BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_call",
}
],
- "actions": [
+ actions=[
"notify",
{"set_tweak": "sound", "value": "ring"},
{"set_tweak": "highlight", "value": False},
],
- },
+ ),
# XXX: once m.direct is standardised everywhere, we should use it to detect
# a DM from the user's perspective rather than this heuristic.
- {
- "rule_id": "global/underride/.m.rule.room_one_to_one",
- "conditions": [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["underride"],
+ rule_id="global/underride/.m.rule.room_one_to_one",
+ conditions=[
{"kind": "room_member_count", "is": "2", "_cache_key": "member_count"},
{
"kind": "event_match",
@@ -333,17 +462,19 @@ BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_message",
},
],
- "actions": [
+ actions=[
"notify",
{"set_tweak": "sound", "value": "default"},
{"set_tweak": "highlight", "value": False},
],
- },
+ ),
# XXX: this is going to fire for events which aren't m.room.messages
# but are encrypted (e.g. m.call.*)...
- {
- "rule_id": "global/underride/.m.rule.encrypted_room_one_to_one",
- "conditions": [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["underride"],
+ rule_id="global/underride/.m.rule.encrypted_room_one_to_one",
+ conditions=[
{"kind": "room_member_count", "is": "2", "_cache_key": "member_count"},
{
"kind": "event_match",
@@ -352,15 +483,17 @@ BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_encrypted",
},
],
- "actions": [
+ actions=[
"notify",
{"set_tweak": "sound", "value": "default"},
{"set_tweak": "highlight", "value": False},
],
- },
- {
- "rule_id": "global/underride/.org.matrix.msc3772.thread_reply",
- "conditions": [
+ ),
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["underride"],
+ rule_id="global/underride/.org.matrix.msc3772.thread_reply",
+ conditions=[
{
"kind": "org.matrix.msc3772.relation_match",
"rel_type": "m.thread",
@@ -368,11 +501,13 @@ BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
"sender_type": "user_id",
}
],
- "actions": ["notify", {"set_tweak": "highlight", "value": False}],
- },
- {
- "rule_id": "global/underride/.m.rule.message",
- "conditions": [
+ actions=["notify", {"set_tweak": "highlight", "value": False}],
+ ),
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["underride"],
+ rule_id="global/underride/.m.rule.message",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -380,13 +515,15 @@ BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_message",
}
],
- "actions": ["notify", {"set_tweak": "highlight", "value": False}],
- },
+ actions=["notify", {"set_tweak": "highlight", "value": False}],
+ ),
# XXX: this is going to fire for events which aren't m.room.messages
# but are encrypted (e.g. m.call.*)...
- {
- "rule_id": "global/underride/.m.rule.encrypted",
- "conditions": [
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["underride"],
+ rule_id="global/underride/.m.rule.encrypted",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -394,11 +531,13 @@ BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_encrypted",
}
],
- "actions": ["notify", {"set_tweak": "highlight", "value": False}],
- },
- {
- "rule_id": "global/underride/.im.vector.jitsi",
- "conditions": [
+ actions=["notify", {"set_tweak": "highlight", "value": False}],
+ ),
+ PushRule(
+ default=True,
+ priority_class=PRIORITY_CLASS_MAP["underride"],
+ rule_id="global/underride/.im.vector.jitsi",
+ conditions=[
{
"kind": "event_match",
"key": "type",
@@ -418,29 +557,27 @@ BASE_APPEND_UNDERRIDE_RULES: List[Dict[str, Any]] = [
"_cache_key": "_is_state_event",
},
],
- "actions": ["notify", {"set_tweak": "highlight", "value": False}],
- },
+ actions=["notify", {"set_tweak": "highlight", "value": False}],
+ ),
]
BASE_RULE_IDS = set()
+BASE_RULES_BY_ID: Dict[str, PushRule] = {}
+
for r in BASE_APPEND_CONTENT_RULES:
- r["priority_class"] = PRIORITY_CLASS_MAP["content"]
- r["default"] = True
- BASE_RULE_IDS.add(r["rule_id"])
+ BASE_RULE_IDS.add(r.rule_id)
+ BASE_RULES_BY_ID[r.rule_id] = r
for r in BASE_PREPEND_OVERRIDE_RULES:
- r["priority_class"] = PRIORITY_CLASS_MAP["override"]
- r["default"] = True
- BASE_RULE_IDS.add(r["rule_id"])
+ BASE_RULE_IDS.add(r.rule_id)
+ BASE_RULES_BY_ID[r.rule_id] = r
for r in BASE_APPEND_OVERRIDE_RULES:
- r["priority_class"] = PRIORITY_CLASS_MAP["override"]
- r["default"] = True
- BASE_RULE_IDS.add(r["rule_id"])
+ BASE_RULE_IDS.add(r.rule_id)
+ BASE_RULES_BY_ID[r.rule_id] = r
for r in BASE_APPEND_UNDERRIDE_RULES:
- r["priority_class"] = PRIORITY_CLASS_MAP["underride"]
- r["default"] = True
- BASE_RULE_IDS.add(r["rule_id"])
+ BASE_RULE_IDS.add(r.rule_id)
+ BASE_RULES_BY_ID[r.rule_id] = r
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