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https://github.com/element-hq/synapse
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Convert get_paginat_rows to use PaginationConfig. This allows people to supply directions.
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parent
77a255c7c3
commit
05672a6a8c
3 changed files with 59 additions and 39 deletions
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@ -22,6 +22,7 @@ from synapse.api.errors import RoomError, StoreError, SynapseError
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from synapse.api.events.room import (
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RoomTopicEvent, RoomMemberEvent, RoomConfigEvent
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)
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from synapse.streams.config import PaginationConfig
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from synapse.util import stringutils
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from ._base import BaseHandler
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@ -115,21 +116,18 @@ class MessageHandler(BaseHandler):
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data_source = self.hs.get_event_sources().sources[0]
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if pagin_config.from_token:
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from_token = pagin_config.from_token
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else:
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from_token = yield self.hs.get_event_sources().get_current_token()
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if not pagin_config.from_token:
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pagin_config.from_token = yield self.hs.get_event_sources().get_current_token()
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user = self.hs.parse_userid(user_id)
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events, next_token = yield data_source.get_pagination_rows(
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user, from_token, pagin_config.to_token, pagin_config.limit,
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room_id
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user, pagin_config, room_id
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)
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chunk = {
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"chunk": [e.get_dict() for e in events],
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"start": from_token.to_string(),
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"start": pagin_config.from_token.to_string(),
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"end": next_token.to_string(),
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}
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@ -277,8 +275,9 @@ class MessageHandler(BaseHandler):
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# FIXME (erikj): Fix this.
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presence_stream = self.hs.get_event_sources().sources[1]
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pagination_config = PaginationConfig(from_token=now_token)
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presence, _ = yield presence_stream.get_pagination_rows(
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user, now_token, None, None, None
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user, pagination_config, None
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)
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limit = pagin_config.limit
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@ -26,40 +26,53 @@ class PaginationConfig(object):
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"""A configuration object which stores pagination parameters."""
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def __init__(self, from_tok=None, to_tok=None, direction='f', limit=0):
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self.from_token = (
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StreamToken.from_string(from_tok) if from_tok else None
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)
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self.to_token = StreamToken.from_string(to_tok) if to_tok else None
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def __init__(self, from_token=None, to_token=None, direction='f',
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limit=0):
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self.from_token = from_token
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self.to_token = to_token
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self.direction = 'f' if direction == 'f' else 'b'
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self.limit = int(limit)
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@classmethod
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def from_request(cls, request, raise_invalid_params=True):
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params = {
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"direction": 'f',
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}
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def get_param(name, default=None):
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lst = request.args.get(name, [])
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if len(lst) > 1:
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raise SynapseError(
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400, "%s must be specified only once" % (name,)
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)
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elif len(lst) == 1:
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return lst[0]
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else:
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return default
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query_param_mappings = [ # 3-tuple of qp_key, attribute, rules
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("from", "from_tok", lambda x: type(x) == str),
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("to", "to_tok", lambda x: type(x) == str),
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("limit", "limit", lambda x: x.isdigit()),
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("dir", "direction", lambda x: x == 'f' or x == 'b'),
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]
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direction = get_param("dir", 'f')
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if direction not in ['f', 'b']:
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raise SynapseError(400, "'dir' parameter is invalid.")
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for qp, attr, is_valid in query_param_mappings:
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if qp in request.args:
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if is_valid(request.args[qp][0]):
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params[attr] = request.args[qp][0]
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elif raise_invalid_params:
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raise SynapseError(400, "%s parameter is invalid." % qp)
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if "from_tok" in params and params["from_tok"] == "END":
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# TODO (erikj): This is for compatibility only.
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del params["from_tok"]
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from_tok = get_param("from")
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to_tok = get_param("to")
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try:
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return PaginationConfig(**params)
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if from_tok == "END":
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from_tok = None # For backwards compat.
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elif from_tok:
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from_tok = StreamToken.from_string(from_tok)
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except:
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raise SynapseError(400, "'from' paramater is invalid")
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try:
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if to_tok:
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to_tok = StreamToken.from_string(to_tok)
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except:
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raise SynapseError(400, "'to' paramater is invalid")
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limit = get_param("limit", "0")
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if not limit.isdigit():
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raise SynapseError(400, "'limit' parameter must be an integer.")
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try:
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return PaginationConfig(from_tok, to_tok, direction, limit)
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except:
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logger.exception("Failed to create pagination config")
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raise SynapseError(400, "Invalid request.")
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@ -47,14 +47,19 @@ class RoomEventSource(object):
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return self.store.get_room_events_max_id()
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@defer.inlineCallbacks
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def get_pagination_rows(self, user, from_token, to_token, limit, key):
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def get_pagination_rows(self, user, pagination_config, key):
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from_token = pagination_config.from_token
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to_token = pagination_config.to_token
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limit = pagination_config.limit
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direction = pagination_config.direction
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to_key = to_token.events_key if to_token else None
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events, next_key = yield self.store.paginate_room_events(
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room_id=key,
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from_key=from_token.events_key,
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to_key=to_key,
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direction='b',
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direction=direction,
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limit=limit,
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with_feedback=True
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)
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@ -101,7 +106,12 @@ class PresenceSource(object):
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presence = self.hs.get_handlers().presence_handler
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return presence._user_cachemap_latest_serial
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def get_pagination_rows(self, user, from_token, to_token, limit, key):
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def get_pagination_rows(self, user, pagination_config, key):
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# TODO (erikj): Does this make sense? Ordering?
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from_token = pagination_config.from_token
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to_token = pagination_config.to_token
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from_key = int(from_token.presence_key)
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if to_token:
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@ -167,7 +177,5 @@ class StreamSource(object):
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def get_current_token_part(self):
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raise NotImplementedError("get_current_token_part")
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class PaginationSource(object):
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def get_pagination_rows(self, user, from_token, to_token, limit, key):
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def get_pagination_rows(self, user, pagination_config, key):
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raise NotImplementedError("get_rows")
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