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Add type hints to filtering classes. (#10958)

This commit is contained in:
Patrick Cloke 2021-10-01 07:02:32 -04:00 committed by GitHub
parent 9e5a429c8b
commit 7e440520c9
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3 changed files with 81 additions and 45 deletions
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1
changelog.d/10958.misc Normal file
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@ -0,0 +1 @@
Add type hints to filtering classes.

117
synapse/api/filtering.py
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@ -15,7 +15,17 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import json
from typing import List
from typing import (
TYPE_CHECKING,
Awaitable,
Container,
Iterable,
List,
Optional,
Set,
TypeVar,
Union,
)
import jsonschema
from jsonschema import FormatChecker
@ -23,7 +33,11 @@ from jsonschema import FormatChecker
from synapse.api.constants import EventContentFields
from synapse.api.errors import SynapseError
from synapse.api.presence import UserPresenceState
from synapse.types import RoomID, UserID
from synapse.events import EventBase
from synapse.types import JsonDict, RoomID, UserID
if TYPE_CHECKING:
from synapse.server import HomeServer
FILTER_SCHEMA = {
"additionalProperties": False,
@ -120,25 +134,29 @@ USER_FILTER_SCHEMA = {
@FormatChecker.cls_checks("matrix_room_id")
def matrix_room_id_validator(room_id_str):
def matrix_room_id_validator(room_id_str: str) -> RoomID:
return RoomID.from_string(room_id_str)
@FormatChecker.cls_checks("matrix_user_id")
def matrix_user_id_validator(user_id_str):
def matrix_user_id_validator(user_id_str: str) -> UserID:
return UserID.from_string(user_id_str)
class Filtering:
def __init__(self, hs):
def __init__(self, hs: "HomeServer"):
super().__init__()
self.store = hs.get_datastore()
async def get_user_filter(self, user_localpart, filter_id):
async def get_user_filter(
self, user_localpart: str, filter_id: Union[int, str]
) -> "FilterCollection":
result = await self.store.get_user_filter(user_localpart, filter_id)
return FilterCollection(result)
def add_user_filter(self, user_localpart, user_filter):
def add_user_filter(
self, user_localpart: str, user_filter: JsonDict
) -> Awaitable[int]:
self.check_valid_filter(user_filter)
return self.store.add_user_filter(user_localpart, user_filter)
@ -146,13 +164,13 @@ class Filtering:
# replace_user_filter at some point? There's no REST API specified for
# them however
def check_valid_filter(self, user_filter_json):
def check_valid_filter(self, user_filter_json: JsonDict) -> None:
"""Check if the provided filter is valid.
This inspects all definitions contained within the filter.
Args:
user_filter_json(dict): The filter
user_filter_json: The filter
Raises:
SynapseError: If the filter is not valid.
"""
@ -167,8 +185,12 @@ class Filtering:
raise SynapseError(400, str(e))
# Filters work across events, presence EDUs, and account data.
FilterEvent = TypeVar("FilterEvent", EventBase, UserPresenceState, JsonDict)
class FilterCollection:
def __init__(self, filter_json):
def __init__(self, filter_json: JsonDict):
self._filter_json = filter_json
room_filter_json = self._filter_json.get("room", {})
@ -188,25 +210,25 @@ class FilterCollection:
self.event_fields = filter_json.get("event_fields", [])
self.event_format = filter_json.get("event_format", "client")
def __repr__(self):
def __repr__(self) -> str:
return "<FilterCollection %s>" % (json.dumps(self._filter_json),)
def get_filter_json(self):
def get_filter_json(self) -> JsonDict:
return self._filter_json
def timeline_limit(self):
def timeline_limit(self) -> int:
return self._room_timeline_filter.limit()
def presence_limit(self):
def presence_limit(self) -> int:
return self._presence_filter.limit()
def ephemeral_limit(self):
def ephemeral_limit(self) -> int:
return self._room_ephemeral_filter.limit()
def lazy_load_members(self):
def lazy_load_members(self) -> bool:
return self._room_state_filter.lazy_load_members()
def include_redundant_members(self):
def include_redundant_members(self) -> bool:
return self._room_state_filter.include_redundant_members()
def filter_presence(self, events):
@ -218,29 +240,31 @@ class FilterCollection:
def filter_room_state(self, events):
return self._room_state_filter.filter(self._room_filter.filter(events))
def filter_room_timeline(self, events):
def filter_room_timeline(self, events: Iterable[FilterEvent]) -> List[FilterEvent]:
return self._room_timeline_filter.filter(self._room_filter.filter(events))
def filter_room_ephemeral(self, events):
def filter_room_ephemeral(self, events: Iterable[FilterEvent]) -> List[FilterEvent]:
return self._room_ephemeral_filter.filter(self._room_filter.filter(events))
def filter_room_account_data(self, events):
def filter_room_account_data(
self, events: Iterable[FilterEvent]
) -> List[FilterEvent]:
return self._room_account_data.filter(self._room_filter.filter(events))
def blocks_all_presence(self):
def blocks_all_presence(self) -> bool:
return (
self._presence_filter.filters_all_types()
or self._presence_filter.filters_all_senders()
)
def blocks_all_room_ephemeral(self):
def blocks_all_room_ephemeral(self) -> bool:
return (
self._room_ephemeral_filter.filters_all_types()
or self._room_ephemeral_filter.filters_all_senders()
or self._room_ephemeral_filter.filters_all_rooms()
)
def blocks_all_room_timeline(self):
def blocks_all_room_timeline(self) -> bool:
return (
self._room_timeline_filter.filters_all_types()
or self._room_timeline_filter.filters_all_senders()
@ -249,7 +273,7 @@ class FilterCollection:
class Filter:
def __init__(self, filter_json):
def __init__(self, filter_json: JsonDict):
self.filter_json = filter_json
self.types = self.filter_json.get("types", None)
@ -266,20 +290,20 @@ class Filter:
self.labels = self.filter_json.get("org.matrix.labels", None)
self.not_labels = self.filter_json.get("org.matrix.not_labels", [])
def filters_all_types(self):
def filters_all_types(self) -> bool:
return "*" in self.not_types
def filters_all_senders(self):
def filters_all_senders(self) -> bool:
return "*" in self.not_senders
def filters_all_rooms(self):
def filters_all_rooms(self) -> bool:
return "*" in self.not_rooms
def check(self, event):
def check(self, event: FilterEvent) -> bool:
"""Checks whether the filter matches the given event.
Returns:
bool: True if the event matches
True if the event matches
"""
# We usually get the full "events" as dictionaries coming through,
# except for presence which actually gets passed around as its own
@ -305,18 +329,25 @@ class Filter:
room_id = event.get("room_id", None)
ev_type = event.get("type", None)
content = event.get("content", {})
content = event.get("content") or {}
# check if there is a string url field in the content for filtering purposes
contains_url = isinstance(content.get("url"), str)
labels = content.get(EventContentFields.LABELS, [])
return self.check_fields(room_id, sender, ev_type, labels, contains_url)
def check_fields(self, room_id, sender, event_type, labels, contains_url):
def check_fields(
self,
room_id: Optional[str],
sender: Optional[str],
event_type: Optional[str],
labels: Container[str],
contains_url: bool,
) -> bool:
"""Checks whether the filter matches the given event fields.
Returns:
bool: True if the event fields match
True if the event fields match
"""
literal_keys = {
"rooms": lambda v: room_id == v,
@ -343,14 +374,14 @@ class Filter:
return True
def filter_rooms(self, room_ids):
def filter_rooms(self, room_ids: Iterable[str]) -> Set[str]:
"""Apply the 'rooms' filter to a given list of rooms.
Args:
room_ids (list): A list of room_ids.
room_ids: A list of room_ids.
Returns:
list: A list of room_ids that match the filter
A list of room_ids that match the filter
"""
room_ids = set(room_ids)
@ -363,23 +394,23 @@ class Filter:
return room_ids
def filter(self, events):
def filter(self, events: Iterable[FilterEvent]) -> List[FilterEvent]:
return list(filter(self.check, events))
def limit(self):
def limit(self) -> int:
return self.filter_json.get("limit", 10)
def lazy_load_members(self):
def lazy_load_members(self) -> bool:
return self.filter_json.get("lazy_load_members", False)
def include_redundant_members(self):
def include_redundant_members(self) -> bool:
return self.filter_json.get("include_redundant_members", False)
def with_room_ids(self, room_ids):
def with_room_ids(self, room_ids: Iterable[str]) -> "Filter":
"""Returns a new filter with the given room IDs appended.
Args:
room_ids (iterable[unicode]): The room_ids to add
room_ids: The room_ids to add
Returns:
filter: A new filter including the given rooms and the old
@ -390,8 +421,8 @@ class Filter:
return newFilter
def _matches_wildcard(actual_value, filter_value):
if filter_value.endswith("*"):
def _matches_wildcard(actual_value: Optional[str], filter_value: str) -> bool:
if filter_value.endswith("*") and isinstance(actual_value, str):
type_prefix = filter_value[:-1]
return actual_value.startswith(type_prefix)
else:

8
synapse/storage/databases/main/filtering.py
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@ -12,6 +12,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Union
from canonicaljson import encode_canonical_json
from synapse.api.errors import Codes, SynapseError
@ -22,7 +24,9 @@ from synapse.util.caches.descriptors import cached
class FilteringStore(SQLBaseStore):
@cached(num_args=2)
async def get_user_filter(self, user_localpart, filter_id):
async def get_user_filter(
self, user_localpart: str, filter_id: Union[int, str]
) -> JsonDict:
# filter_id is BIGINT UNSIGNED, so if it isn't a number, fail
# with a coherent error message rather than 500 M_UNKNOWN.
try:
@ -40,7 +44,7 @@ class FilteringStore(SQLBaseStore):
return db_to_json(def_json)
async def add_user_filter(self, user_localpart: str, user_filter: JsonDict) -> str:
async def add_user_filter(self, user_localpart: str, user_filter: JsonDict) -> int:
def_json = encode_canonical_json(user_filter)
# Need an atomic transaction to SELECT the maximal ID so far then