Exemplo n.º 1
0
    def compute_event_context(self, event, old_state=None):
        """ Fills out the context with the `current state` of the graph. The
        `current state` here is defined to be the state of the event graph
        just before the event - i.e. it never includes `event`

        If `event` has `auth_events` then this will also fill out the
        `auth_events` field on `context` from the `current_state`.

        Args:
            event (EventBase)
        Returns:
            an EventContext
        """
        context = EventContext()

        if event.internal_metadata.is_outlier():
            # If this is an outlier, then we know it shouldn't have any current
            # state. Certainly store.get_current_state won't return any, and
            # persisting the event won't store the state group.
            if old_state:
                context.prev_state_ids = {
                    (s.type, s.state_key): s.event_id for s in old_state
                }
                if event.is_state():
                    context.current_state_events = dict(context.prev_state_ids)
                    key = (event.type, event.state_key)
                    context.current_state_events[key] = event.event_id
                else:
                    context.current_state_events = context.prev_state_ids
            else:
                context.current_state_ids = {}
                context.prev_state_ids = {}
            context.prev_state_events = []
            context.state_group = self.store.get_next_state_group()
            defer.returnValue(context)

        if old_state:
            context.prev_state_ids = {
                (s.type, s.state_key): s.event_id for s in old_state
            }
            context.state_group = self.store.get_next_state_group()

            if event.is_state():
                key = (event.type, event.state_key)
                if key in context.prev_state_ids:
                    replaces = context.prev_state_ids[key]
                    if replaces != event.event_id:  # Paranoia check
                        event.unsigned["replaces_state"] = replaces
                context.current_state_ids = dict(context.prev_state_ids)
                context.current_state_ids[key] = event.event_id
            else:
                context.current_state_ids = context.prev_state_ids

            context.prev_state_events = []
            defer.returnValue(context)

        if event.is_state():
            entry = yield self.resolve_state_groups(
                event.room_id, [e for e, _ in event.prev_events],
                event_type=event.type,
                state_key=event.state_key,
            )
        else:
            entry = yield self.resolve_state_groups(
                event.room_id, [e for e, _ in event.prev_events],
            )

        curr_state = entry.state

        context.prev_state_ids = curr_state
        if event.is_state():
            context.state_group = self.store.get_next_state_group()

            key = (event.type, event.state_key)
            if key in context.prev_state_ids:
                replaces = context.prev_state_ids[key]
                event.unsigned["replaces_state"] = replaces

            context.current_state_ids = dict(context.prev_state_ids)
            context.current_state_ids[key] = event.event_id

            context.prev_group = entry.prev_group
            context.delta_ids = entry.delta_ids
            if context.delta_ids is not None:
                context.delta_ids = dict(context.delta_ids)
                context.delta_ids[key] = event.event_id
        else:
            if entry.state_group is None:
                entry.state_group = self.store.get_next_state_group()
                entry.state_id = entry.state_group

            context.state_group = entry.state_group
            context.current_state_ids = context.prev_state_ids
            context.prev_group = entry.prev_group
            context.delta_ids = entry.delta_ids

        context.prev_state_events = []
        defer.returnValue(context)
Exemplo n.º 2
0
    def compute_event_context(self, event, old_state=None):
        """Build an EventContext structure for the event.

        This works out what the current state should be for the event, and
        generates a new state group if necessary.

        Args:
            event (synapse.events.EventBase):
            old_state (dict|None): The state at the event if it can't be
                calculated from existing events. This is normally only specified
                when receiving an event from federation where we don't have the
                prev events for, e.g. when backfilling.
        Returns:
            synapse.events.snapshot.EventContext:
        """

        if event.internal_metadata.is_outlier():
            # If this is an outlier, then we know it shouldn't have any current
            # state. Certainly store.get_current_state won't return any, and
            # persisting the event won't store the state group.
            context = EventContext()
            if old_state:
                context.prev_state_ids = {(s.type, s.state_key): s.event_id
                                          for s in old_state}
                if event.is_state():
                    context.current_state_ids = dict(context.prev_state_ids)
                    key = (event.type, event.state_key)
                    context.current_state_ids[key] = event.event_id
                else:
                    context.current_state_ids = context.prev_state_ids
            else:
                context.current_state_ids = {}
                context.prev_state_ids = {}
            context.prev_state_events = []

            # We don't store state for outliers, so we don't generate a state
            # froup for it.
            context.state_group = None

            defer.returnValue(context)

        if old_state:
            # We already have the state, so we don't need to calculate it.
            # Let's just correctly fill out the context and create a
            # new state group for it.

            context = EventContext()
            context.prev_state_ids = {(s.type, s.state_key): s.event_id
                                      for s in old_state}

            if event.is_state():
                key = (event.type, event.state_key)
                if key in context.prev_state_ids:
                    replaces = context.prev_state_ids[key]
                    if replaces != event.event_id:  # Paranoia check
                        event.unsigned["replaces_state"] = replaces
                context.current_state_ids = dict(context.prev_state_ids)
                context.current_state_ids[key] = event.event_id
            else:
                context.current_state_ids = context.prev_state_ids

            context.state_group = yield self.store.store_state_group(
                event.event_id,
                event.room_id,
                prev_group=None,
                delta_ids=None,
                current_state_ids=context.current_state_ids,
            )

            context.prev_state_events = []
            defer.returnValue(context)

        logger.debug("calling resolve_state_groups from compute_event_context")
        entry = yield self.resolve_state_groups_for_events(
            event.room_id,
            [e for e, _ in event.prev_events],
        )

        curr_state = entry.state

        context = EventContext()
        context.prev_state_ids = curr_state
        if event.is_state():
            # If this is a state event then we need to create a new state
            # group for the state after this event.

            key = (event.type, event.state_key)
            if key in context.prev_state_ids:
                replaces = context.prev_state_ids[key]
                event.unsigned["replaces_state"] = replaces

            context.current_state_ids = dict(context.prev_state_ids)
            context.current_state_ids[key] = event.event_id

            if entry.state_group:
                # If the state at the event has a state group assigned then
                # we can use that as the prev group
                context.prev_group = entry.state_group
                context.delta_ids = {key: event.event_id}
            elif entry.prev_group:
                # If the state at the event only has a prev group, then we can
                # use that as a prev group too.
                context.prev_group = entry.prev_group
                context.delta_ids = dict(entry.delta_ids)
                context.delta_ids[key] = event.event_id

            context.state_group = yield self.store.store_state_group(
                event.event_id,
                event.room_id,
                prev_group=context.prev_group,
                delta_ids=context.delta_ids,
                current_state_ids=context.current_state_ids,
            )
        else:
            context.current_state_ids = context.prev_state_ids
            context.prev_group = entry.prev_group
            context.delta_ids = entry.delta_ids

            if entry.state_group is None:
                entry.state_group = yield self.store.store_state_group(
                    event.event_id,
                    event.room_id,
                    prev_group=entry.prev_group,
                    delta_ids=entry.delta_ids,
                    current_state_ids=context.current_state_ids,
                )
                entry.state_id = entry.state_group

            context.state_group = entry.state_group

        context.prev_state_events = []
        defer.returnValue(context)
Exemplo n.º 3
0
    def compute_event_context(self, event, old_state=None):
        """Build an EventContext structure for the event.

        This works out what the current state should be for the event, and
        generates a new state group if necessary.

        Args:
            event (synapse.events.EventBase):
            old_state (dict|None): The state at the event if it can't be
                calculated from existing events. This is normally only specified
                when receiving an event from federation where we don't have the
                prev events for, e.g. when backfilling.
        Returns:
            synapse.events.snapshot.EventContext:
        """

        if event.internal_metadata.is_outlier():
            # If this is an outlier, then we know it shouldn't have any current
            # state. Certainly store.get_current_state won't return any, and
            # persisting the event won't store the state group.
            context = EventContext()
            if old_state:
                context.prev_state_ids = {
                    (s.type, s.state_key): s.event_id for s in old_state
                }
                if event.is_state():
                    context.current_state_ids = dict(context.prev_state_ids)
                    key = (event.type, event.state_key)
                    context.current_state_ids[key] = event.event_id
                else:
                    context.current_state_ids = context.prev_state_ids
            else:
                context.current_state_ids = {}
                context.prev_state_ids = {}
            context.prev_state_events = []

            # We don't store state for outliers, so we don't generate a state
            # froup for it.
            context.state_group = None

            defer.returnValue(context)

        if old_state:
            # We already have the state, so we don't need to calculate it.
            # Let's just correctly fill out the context and create a
            # new state group for it.

            context = EventContext()
            context.prev_state_ids = {
                (s.type, s.state_key): s.event_id for s in old_state
            }

            if event.is_state():
                key = (event.type, event.state_key)
                if key in context.prev_state_ids:
                    replaces = context.prev_state_ids[key]
                    if replaces != event.event_id:  # Paranoia check
                        event.unsigned["replaces_state"] = replaces
                context.current_state_ids = dict(context.prev_state_ids)
                context.current_state_ids[key] = event.event_id
            else:
                context.current_state_ids = context.prev_state_ids

            context.state_group = yield self.store.store_state_group(
                event.event_id,
                event.room_id,
                prev_group=None,
                delta_ids=None,
                current_state_ids=context.current_state_ids,
            )

            context.prev_state_events = []
            defer.returnValue(context)

        logger.debug("calling resolve_state_groups from compute_event_context")
        entry = yield self.resolve_state_groups_for_events(
            event.room_id, [e for e, _ in event.prev_events],
        )

        curr_state = entry.state

        context = EventContext()
        context.prev_state_ids = curr_state
        if event.is_state():
            # If this is a state event then we need to create a new state
            # group for the state after this event.

            key = (event.type, event.state_key)
            if key in context.prev_state_ids:
                replaces = context.prev_state_ids[key]
                event.unsigned["replaces_state"] = replaces

            context.current_state_ids = dict(context.prev_state_ids)
            context.current_state_ids[key] = event.event_id

            if entry.state_group:
                # If the state at the event has a state group assigned then
                # we can use that as the prev group
                context.prev_group = entry.state_group
                context.delta_ids = {
                    key: event.event_id
                }
            elif entry.prev_group:
                # If the state at the event only has a prev group, then we can
                # use that as a prev group too.
                context.prev_group = entry.prev_group
                context.delta_ids = dict(entry.delta_ids)
                context.delta_ids[key] = event.event_id

            context.state_group = yield self.store.store_state_group(
                event.event_id,
                event.room_id,
                prev_group=context.prev_group,
                delta_ids=context.delta_ids,
                current_state_ids=context.current_state_ids,
            )
        else:
            context.current_state_ids = context.prev_state_ids
            context.prev_group = entry.prev_group
            context.delta_ids = entry.delta_ids

            if entry.state_group is None:
                entry.state_group = yield self.store.store_state_group(
                    event.event_id,
                    event.room_id,
                    prev_group=entry.prev_group,
                    delta_ids=entry.delta_ids,
                    current_state_ids=context.current_state_ids,
                )
                entry.state_id = entry.state_group

            context.state_group = entry.state_group

        context.prev_state_events = []
        defer.returnValue(context)
Exemplo n.º 4
0
    def compute_event_context(self, event, old_state=None):
        """ Fills out the context with the `current state` of the graph. The
        `current state` here is defined to be the state of the event graph
        just before the event - i.e. it never includes `event`

        If `event` has `auth_events` then this will also fill out the
        `auth_events` field on `context` from the `current_state`.

        Args:
            event (EventBase)
        Returns:
            an EventContext
        """
        context = EventContext()

        if event.internal_metadata.is_outlier():
            # If this is an outlier, then we know it shouldn't have any current
            # state. Certainly store.get_current_state won't return any, and
            # persisting the event won't store the state group.
            if old_state:
                context.prev_state_ids = {(s.type, s.state_key): s.event_id
                                          for s in old_state}
                if event.is_state():
                    context.current_state_events = dict(context.prev_state_ids)
                    key = (event.type, event.state_key)
                    context.current_state_events[key] = event.event_id
                else:
                    context.current_state_events = context.prev_state_ids
            else:
                context.current_state_ids = {}
                context.prev_state_ids = {}
            context.prev_state_events = []
            context.state_group = self.store.get_next_state_group()
            defer.returnValue(context)

        if old_state:
            context.prev_state_ids = {(s.type, s.state_key): s.event_id
                                      for s in old_state}
            context.state_group = self.store.get_next_state_group()

            if event.is_state():
                key = (event.type, event.state_key)
                if key in context.prev_state_ids:
                    replaces = context.prev_state_ids[key]
                    if replaces != event.event_id:  # Paranoia check
                        event.unsigned["replaces_state"] = replaces
                context.current_state_ids = dict(context.prev_state_ids)
                context.current_state_ids[key] = event.event_id
            else:
                context.current_state_ids = context.prev_state_ids

            context.prev_state_events = []
            defer.returnValue(context)

        logger.debug("calling resolve_state_groups from compute_event_context")
        if event.is_state():
            entry = yield self.resolve_state_groups(
                event.room_id,
                [e for e, _ in event.prev_events],
                event_type=event.type,
                state_key=event.state_key,
            )
        else:
            entry = yield self.resolve_state_groups(
                event.room_id,
                [e for e, _ in event.prev_events],
            )

        curr_state = entry.state

        context.prev_state_ids = curr_state
        if event.is_state():
            context.state_group = self.store.get_next_state_group()

            key = (event.type, event.state_key)
            if key in context.prev_state_ids:
                replaces = context.prev_state_ids[key]
                event.unsigned["replaces_state"] = replaces

            context.current_state_ids = dict(context.prev_state_ids)
            context.current_state_ids[key] = event.event_id

            context.prev_group = entry.prev_group
            context.delta_ids = entry.delta_ids
            if context.delta_ids is not None:
                context.delta_ids = dict(context.delta_ids)
                context.delta_ids[key] = event.event_id
        else:
            if entry.state_group is None:
                entry.state_group = self.store.get_next_state_group()
                entry.state_id = entry.state_group

            context.state_group = entry.state_group
            context.current_state_ids = context.prev_state_ids
            context.prev_group = entry.prev_group
            context.delta_ids = entry.delta_ids

        context.prev_state_events = []
        defer.returnValue(context)
Exemplo n.º 5
0
    def compute_event_context(self, event, old_state=None):
        """Build an EventContext structure for the event.

        Args:
            event (synapse.events.EventBase):
        Returns:
            synapse.events.snapshot.EventContext:
        """
        context = EventContext()

        if event.internal_metadata.is_outlier():
            # If this is an outlier, then we know it shouldn't have any current
            # state. Certainly store.get_current_state won't return any, and
            # persisting the event won't store the state group.
            if old_state:
                context.prev_state_ids = {(s.type, s.state_key): s.event_id
                                          for s in old_state}
                if event.is_state():
                    context.current_state_ids = dict(context.prev_state_ids)
                    key = (event.type, event.state_key)
                    context.current_state_ids[key] = event.event_id
                else:
                    context.current_state_ids = context.prev_state_ids
            else:
                context.current_state_ids = {}
                context.prev_state_ids = {}
            context.prev_state_events = []
            context.state_group = self.store.get_next_state_group()
            defer.returnValue(context)

        if old_state:
            context.prev_state_ids = {(s.type, s.state_key): s.event_id
                                      for s in old_state}
            context.state_group = self.store.get_next_state_group()

            if event.is_state():
                key = (event.type, event.state_key)
                if key in context.prev_state_ids:
                    replaces = context.prev_state_ids[key]
                    if replaces != event.event_id:  # Paranoia check
                        event.unsigned["replaces_state"] = replaces
                context.current_state_ids = dict(context.prev_state_ids)
                context.current_state_ids[key] = event.event_id
            else:
                context.current_state_ids = context.prev_state_ids

            context.prev_state_events = []
            defer.returnValue(context)

        logger.debug("calling resolve_state_groups from compute_event_context")
        if event.is_state():
            entry = yield self.resolve_state_groups(
                event.room_id,
                [e for e, _ in event.prev_events],
                event_type=event.type,
                state_key=event.state_key,
            )
        else:
            entry = yield self.resolve_state_groups(
                event.room_id,
                [e for e, _ in event.prev_events],
            )

        curr_state = entry.state

        context.prev_state_ids = curr_state
        if event.is_state():
            context.state_group = self.store.get_next_state_group()

            key = (event.type, event.state_key)
            if key in context.prev_state_ids:
                replaces = context.prev_state_ids[key]
                event.unsigned["replaces_state"] = replaces

            context.current_state_ids = dict(context.prev_state_ids)
            context.current_state_ids[key] = event.event_id

            context.prev_group = entry.prev_group
            context.delta_ids = entry.delta_ids
            if context.delta_ids is not None:
                context.delta_ids = dict(context.delta_ids)
                context.delta_ids[key] = event.event_id
        else:
            if entry.state_group is None:
                entry.state_group = self.store.get_next_state_group()
                entry.state_id = entry.state_group

            context.state_group = entry.state_group
            context.current_state_ids = context.prev_state_ids
            context.prev_group = entry.prev_group
            context.delta_ids = entry.delta_ids

        context.prev_state_events = []
        defer.returnValue(context)