635 lines
19 KiB
Go
635 lines
19 KiB
Go
// Copyright 2017 Vector Creations Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package types
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import (
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"encoding/json"
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"errors"
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"fmt"
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"strconv"
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"strings"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/gomatrixserverlib/spec"
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"github.com/tidwall/gjson"
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"github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/dendrite/syncapi/synctypes"
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)
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var (
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// This error is returned when parsing sync tokens if the token is invalid. Callers can use this
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// error to detect whether to 400 or 401 the client. It is recommended to 401 them to force a
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// logout.
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ErrMalformedSyncToken = errors.New("malformed sync token")
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)
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type StateDelta struct {
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RoomID string
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StateEvents []*types.HeaderedEvent
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NewlyJoined bool
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Membership string
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// The PDU stream position of the latest membership event for this user, if applicable.
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// Can be 0 if there is no membership event in this delta.
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MembershipPos StreamPosition
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}
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// StreamPosition represents the offset in the sync stream a client is at.
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type StreamPosition int64
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func NewStreamPositionFromString(s string) (StreamPosition, error) {
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n, err := strconv.Atoi(s)
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if err != nil {
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return 0, err
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}
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return StreamPosition(n), nil
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}
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// StreamEvent is the same as gomatrixserverlib.Event but also has the PDU stream position for this event.
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type StreamEvent struct {
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*types.HeaderedEvent
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StreamPosition StreamPosition
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TransactionID *api.TransactionID
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ExcludeFromSync bool
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}
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type RecentEvents struct {
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Limited bool
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Events []StreamEvent
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}
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// Range represents a range between two stream positions.
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type Range struct {
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// From is the position the client has already received.
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From StreamPosition
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// To is the position the client is going towards.
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To StreamPosition
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// True if the client is going backwards
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Backwards bool
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}
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// Low returns the low number of the range.
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// This represents the position the client already has and hence is exclusive.
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func (r *Range) Low() StreamPosition {
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if !r.Backwards {
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return r.From
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}
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return r.To
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}
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// High returns the high number of the range
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// This represents the position the client is going towards and hence is inclusive.
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func (r *Range) High() StreamPosition {
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if !r.Backwards {
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return r.To
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}
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return r.From
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}
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// SyncTokenType represents the type of a sync token.
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// It can be either "s" (representing a position in the whole stream of events)
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// or "t" (representing a position in a room's topology/depth).
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type SyncTokenType string
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const (
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// SyncTokenTypeStream represents a position in the server's whole
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// stream of events
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SyncTokenTypeStream SyncTokenType = "s"
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// SyncTokenTypeTopology represents a position in a room's topology.
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SyncTokenTypeTopology SyncTokenType = "t"
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)
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type StreamingToken struct {
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PDUPosition StreamPosition
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TypingPosition StreamPosition
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ReceiptPosition StreamPosition
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SendToDevicePosition StreamPosition
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InvitePosition StreamPosition
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AccountDataPosition StreamPosition
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DeviceListPosition StreamPosition
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NotificationDataPosition StreamPosition
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PresencePosition StreamPosition
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}
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// This will be used as a fallback by json.Marshal.
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func (s StreamingToken) MarshalText() ([]byte, error) {
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return []byte(s.String()), nil
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}
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// This will be used as a fallback by json.Unmarshal.
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func (s *StreamingToken) UnmarshalText(text []byte) (err error) {
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*s, err = NewStreamTokenFromString(string(text))
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return err
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}
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func (t StreamingToken) String() string {
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posStr := fmt.Sprintf(
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"s%d_%d_%d_%d_%d_%d_%d_%d_%d",
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t.PDUPosition, t.TypingPosition,
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t.ReceiptPosition, t.SendToDevicePosition,
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t.InvitePosition, t.AccountDataPosition,
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t.DeviceListPosition, t.NotificationDataPosition,
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t.PresencePosition,
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)
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return posStr
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}
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// IsAfter returns true if ANY position in this token is greater than `other`.
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func (t *StreamingToken) IsAfter(other StreamingToken) bool {
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switch {
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case t.PDUPosition > other.PDUPosition:
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return true
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case t.TypingPosition > other.TypingPosition:
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return true
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case t.ReceiptPosition > other.ReceiptPosition:
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return true
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case t.SendToDevicePosition > other.SendToDevicePosition:
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return true
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case t.InvitePosition > other.InvitePosition:
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return true
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case t.AccountDataPosition > other.AccountDataPosition:
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return true
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case t.DeviceListPosition > other.DeviceListPosition:
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return true
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case t.NotificationDataPosition > other.NotificationDataPosition:
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return true
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case t.PresencePosition > other.PresencePosition:
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return true
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}
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return false
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}
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func (t *StreamingToken) IsEmpty() bool {
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return t == nil || t.PDUPosition+t.TypingPosition+t.ReceiptPosition+t.SendToDevicePosition+t.InvitePosition+t.AccountDataPosition+t.DeviceListPosition+t.NotificationDataPosition+t.PresencePosition == 0
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}
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// WithUpdates returns a copy of the StreamingToken with updates applied from another StreamingToken.
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// If the latter StreamingToken contains a field that is not 0, it is considered an update,
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// and its value will replace the corresponding value in the StreamingToken on which WithUpdates is called.
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// If the other token has a log, they will replace any existing log on this token.
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func (t *StreamingToken) WithUpdates(other StreamingToken) StreamingToken {
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ret := *t
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ret.ApplyUpdates(other)
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return ret
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}
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// ApplyUpdates applies any changes from the supplied StreamingToken. If the supplied
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// streaming token contains any positions that are not 0, they are considered updates
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// and will overwrite the value in the token.
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func (t *StreamingToken) ApplyUpdates(other StreamingToken) {
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if other.PDUPosition > t.PDUPosition {
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t.PDUPosition = other.PDUPosition
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}
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if other.TypingPosition > t.TypingPosition {
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t.TypingPosition = other.TypingPosition
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}
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if other.ReceiptPosition > t.ReceiptPosition {
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t.ReceiptPosition = other.ReceiptPosition
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}
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if other.SendToDevicePosition > t.SendToDevicePosition {
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t.SendToDevicePosition = other.SendToDevicePosition
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}
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if other.InvitePosition > t.InvitePosition {
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t.InvitePosition = other.InvitePosition
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}
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if other.AccountDataPosition > t.AccountDataPosition {
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t.AccountDataPosition = other.AccountDataPosition
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}
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if other.DeviceListPosition > t.DeviceListPosition {
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t.DeviceListPosition = other.DeviceListPosition
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}
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if other.NotificationDataPosition > t.NotificationDataPosition {
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t.NotificationDataPosition = other.NotificationDataPosition
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}
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if other.PresencePosition > t.PresencePosition {
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t.PresencePosition = other.PresencePosition
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}
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}
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type TopologyToken struct {
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Depth StreamPosition
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PDUPosition StreamPosition
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}
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// This will be used as a fallback by json.Marshal.
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func (t TopologyToken) MarshalText() ([]byte, error) {
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return []byte(t.String()), nil
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}
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// This will be used as a fallback by json.Unmarshal.
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func (t *TopologyToken) UnmarshalText(text []byte) (err error) {
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*t, err = NewTopologyTokenFromString(string(text))
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return err
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}
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func (t *TopologyToken) StreamToken() StreamingToken {
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return StreamingToken{
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PDUPosition: t.PDUPosition,
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}
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}
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func (t TopologyToken) String() string {
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if t.Depth <= 0 && t.PDUPosition <= 0 {
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return ""
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}
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return fmt.Sprintf("t%d_%d", t.Depth, t.PDUPosition)
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}
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// Decrement the topology token to one event earlier.
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func (t *TopologyToken) Decrement() {
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depth := t.Depth
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pduPos := t.PDUPosition
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if depth-1 <= 0 {
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// nothing can be lower than this
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depth = 1
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} else {
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// this assumes that we will never have 1000 events all with the same
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// depth. TODO: work out what the right PDU position is to use, probably needs a db hit.
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depth--
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pduPos += 1000
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}
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// The lowest token value is 1, therefore we need to manually set it to that
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// value if we're below it.
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if depth < 1 {
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depth = 1
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}
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t.Depth = depth
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t.PDUPosition = pduPos
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}
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func NewTopologyTokenFromString(tok string) (token TopologyToken, err error) {
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if len(tok) < 1 {
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err = fmt.Errorf("empty topology token")
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return
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}
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if tok[0] != SyncTokenTypeTopology[0] {
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err = fmt.Errorf("topology token must start with 't'")
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return
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}
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parts := strings.Split(tok[1:], "_")
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var positions [2]StreamPosition
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for i, p := range parts {
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if i > len(positions) {
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break
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}
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var pos int
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pos, err = strconv.Atoi(p)
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if err != nil {
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return
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}
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positions[i] = StreamPosition(pos)
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}
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token = TopologyToken{
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Depth: positions[0],
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PDUPosition: positions[1],
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}
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return
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}
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func NewStreamTokenFromString(tok string) (token StreamingToken, err error) {
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if len(tok) < 1 {
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err = ErrMalformedSyncToken
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return
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}
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if tok[0] != SyncTokenTypeStream[0] {
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err = ErrMalformedSyncToken
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return
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}
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// Migration: Remove everything after and including '.' - we previously had tokens like:
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// s478_0_0_0_0_13.dl-0-2 but we have now removed partitioned stream positions
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tok = strings.Split(tok, ".")[0]
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parts := strings.Split(tok[1:], "_")
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var positions [9]StreamPosition
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for i, p := range parts {
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if i >= len(positions) {
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break
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}
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var pos int
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pos, err = strconv.Atoi(p)
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if err != nil {
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err = ErrMalformedSyncToken
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return
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}
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positions[i] = StreamPosition(pos)
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}
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token = StreamingToken{
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PDUPosition: positions[0],
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TypingPosition: positions[1],
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ReceiptPosition: positions[2],
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SendToDevicePosition: positions[3],
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InvitePosition: positions[4],
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AccountDataPosition: positions[5],
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DeviceListPosition: positions[6],
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NotificationDataPosition: positions[7],
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PresencePosition: positions[8],
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}
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return token, nil
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}
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// PrevEventRef represents a reference to a previous event in a state event upgrade
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type PrevEventRef struct {
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PrevContent json.RawMessage `json:"prev_content"`
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ReplacesState string `json:"replaces_state"`
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PrevSender string `json:"prev_sender"`
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}
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type DeviceLists struct {
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Changed []string `json:"changed,omitempty"`
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Left []string `json:"left,omitempty"`
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}
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type RoomsResponse struct {
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Join map[string]*JoinResponse `json:"join,omitempty"`
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Peek map[string]*JoinResponse `json:"peek,omitempty"`
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Invite map[string]*InviteResponse `json:"invite,omitempty"`
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Leave map[string]*LeaveResponse `json:"leave,omitempty"`
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}
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type ToDeviceResponse struct {
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Events []gomatrixserverlib.SendToDeviceEvent `json:"events,omitempty"`
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}
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// Response represents a /sync API response. See https://matrix.org/docs/spec/client_server/r0.2.0.html#get-matrix-client-r0-sync
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type Response struct {
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NextBatch StreamingToken `json:"next_batch"`
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AccountData *ClientEvents `json:"account_data,omitempty"`
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Presence *ClientEvents `json:"presence,omitempty"`
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Rooms *RoomsResponse `json:"rooms,omitempty"`
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ToDevice *ToDeviceResponse `json:"to_device,omitempty"`
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DeviceLists *DeviceLists `json:"device_lists,omitempty"`
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DeviceListsOTKCount map[string]int `json:"device_one_time_keys_count,omitempty"`
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}
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func (r Response) MarshalJSON() ([]byte, error) {
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type alias Response
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a := alias(r)
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if r.AccountData != nil && len(r.AccountData.Events) == 0 {
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a.AccountData = nil
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}
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if r.Presence != nil && len(r.Presence.Events) == 0 {
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a.Presence = nil
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}
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if r.DeviceLists != nil {
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if len(r.DeviceLists.Left) == 0 && len(r.DeviceLists.Changed) == 0 {
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a.DeviceLists = nil
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}
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}
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if r.Rooms != nil {
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if len(r.Rooms.Join) == 0 && len(r.Rooms.Peek) == 0 &&
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len(r.Rooms.Invite) == 0 && len(r.Rooms.Leave) == 0 {
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a.Rooms = nil
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}
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}
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if r.ToDevice != nil && len(r.ToDevice.Events) == 0 {
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a.ToDevice = nil
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}
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return json.Marshal(a)
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}
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func (r *Response) HasUpdates() bool {
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// purposefully exclude DeviceListsOTKCount as we always include them
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return (len(r.AccountData.Events) > 0 ||
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len(r.Presence.Events) > 0 ||
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len(r.Rooms.Invite) > 0 ||
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len(r.Rooms.Join) > 0 ||
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len(r.Rooms.Leave) > 0 ||
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len(r.Rooms.Peek) > 0 ||
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len(r.ToDevice.Events) > 0 ||
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len(r.DeviceLists.Changed) > 0 ||
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len(r.DeviceLists.Left) > 0)
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}
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// NewResponse creates an empty response with initialised maps.
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func NewResponse() *Response {
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res := Response{}
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// Pre-initialise the maps. Synapse will return {} even if there are no rooms under a specific section,
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// so let's do the same thing. Bonus: this means we can't get dreaded 'assignment to entry in nil map' errors.
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res.Rooms = &RoomsResponse{
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Join: map[string]*JoinResponse{},
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Peek: map[string]*JoinResponse{},
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Invite: map[string]*InviteResponse{},
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Leave: map[string]*LeaveResponse{},
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}
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// Also pre-intialise empty slices or else we'll insert 'null' instead of '[]' for the value.
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// TODO: We really shouldn't have to do all this to coerce encoding/json to Do The Right Thing. We should
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// really be using our own Marshal/Unmarshal implementations otherwise this may prove to be a CPU bottleneck.
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// This also applies to NewJoinResponse, NewInviteResponse and NewLeaveResponse.
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res.AccountData = &ClientEvents{}
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res.Presence = &ClientEvents{}
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res.DeviceLists = &DeviceLists{}
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res.ToDevice = &ToDeviceResponse{}
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res.DeviceListsOTKCount = map[string]int{}
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return &res
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}
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// IsEmpty returns true if the response is empty, i.e. used to decided whether
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// to return the response immediately to the client or to wait for more data.
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func (r *Response) IsEmpty() bool {
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return len(r.Rooms.Join) == 0 &&
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len(r.Rooms.Invite) == 0 &&
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len(r.Rooms.Leave) == 0 &&
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len(r.AccountData.Events) == 0 &&
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len(r.Presence.Events) == 0 &&
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len(r.ToDevice.Events) == 0
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}
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type UnreadNotifications struct {
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HighlightCount int `json:"highlight_count"`
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NotificationCount int `json:"notification_count"`
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}
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type ClientEvents struct {
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Events []synctypes.ClientEvent `json:"events,omitempty"`
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}
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type Timeline struct {
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Events []synctypes.ClientEvent `json:"events"`
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Limited bool `json:"limited"`
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PrevBatch *TopologyToken `json:"prev_batch,omitempty"`
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}
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type Summary struct {
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Heroes []string `json:"m.heroes,omitempty"`
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JoinedMemberCount *int `json:"m.joined_member_count,omitempty"`
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InvitedMemberCount *int `json:"m.invited_member_count,omitempty"`
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}
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// JoinResponse represents a /sync response for a room which is under the 'join' or 'peek' key.
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type JoinResponse struct {
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Summary *Summary `json:"summary,omitempty"`
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State *ClientEvents `json:"state,omitempty"`
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Timeline *Timeline `json:"timeline,omitempty"`
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Ephemeral *ClientEvents `json:"ephemeral,omitempty"`
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AccountData *ClientEvents `json:"account_data,omitempty"`
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*UnreadNotifications `json:"unread_notifications,omitempty"`
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}
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func (jr JoinResponse) MarshalJSON() ([]byte, error) {
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type alias JoinResponse
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a := alias(jr)
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if jr.State != nil && len(jr.State.Events) == 0 {
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a.State = nil
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}
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if jr.Ephemeral != nil && len(jr.Ephemeral.Events) == 0 {
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a.Ephemeral = nil
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}
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if jr.Ephemeral != nil {
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// Remove the room_id from EDUs, as this seems to cause Element Web
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// to trigger notifications - https://github.com/vector-im/element-web/issues/17263
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for i := range jr.Ephemeral.Events {
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jr.Ephemeral.Events[i].RoomID = ""
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}
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}
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if jr.AccountData != nil && len(jr.AccountData.Events) == 0 {
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a.AccountData = nil
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}
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if jr.Timeline != nil && len(jr.Timeline.Events) == 0 {
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a.Timeline = nil
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}
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if jr.Summary != nil {
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var nilPtr int
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joinedEmpty := jr.Summary.JoinedMemberCount == nil || jr.Summary.JoinedMemberCount == &nilPtr
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invitedEmpty := jr.Summary.InvitedMemberCount == nil || jr.Summary.InvitedMemberCount == &nilPtr
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if joinedEmpty && invitedEmpty && len(jr.Summary.Heroes) == 0 {
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a.Summary = nil
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}
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|
|
}
|
|
if jr.UnreadNotifications != nil {
|
|
// if everything else is nil, also remove UnreadNotifications
|
|
if a.State == nil && a.Ephemeral == nil && a.AccountData == nil && a.Timeline == nil && a.Summary == nil {
|
|
a.UnreadNotifications = nil
|
|
}
|
|
}
|
|
return json.Marshal(a)
|
|
}
|
|
|
|
// NewJoinResponse creates an empty response with initialised arrays.
|
|
func NewJoinResponse() *JoinResponse {
|
|
return &JoinResponse{
|
|
Summary: &Summary{},
|
|
State: &ClientEvents{},
|
|
Timeline: &Timeline{},
|
|
Ephemeral: &ClientEvents{},
|
|
AccountData: &ClientEvents{},
|
|
UnreadNotifications: &UnreadNotifications{},
|
|
}
|
|
}
|
|
|
|
// InviteResponse represents a /sync response for a room which is under the 'invite' key.
|
|
type InviteResponse struct {
|
|
InviteState struct {
|
|
Events []json.RawMessage `json:"events"`
|
|
} `json:"invite_state"`
|
|
}
|
|
|
|
// NewInviteResponse creates an empty response with initialised arrays.
|
|
func NewInviteResponse(event *types.HeaderedEvent, userID spec.UserID) *InviteResponse {
|
|
res := InviteResponse{}
|
|
res.InviteState.Events = []json.RawMessage{}
|
|
|
|
// First see if there's invite_room_state in the unsigned key of the invite.
|
|
// If there is then unmarshal it into the response. This will contain the
|
|
// partial room state such as join rules, room name etc.
|
|
if inviteRoomState := gjson.GetBytes(event.Unsigned(), "invite_room_state"); inviteRoomState.Exists() {
|
|
_ = json.Unmarshal([]byte(inviteRoomState.Raw), &res.InviteState.Events)
|
|
}
|
|
|
|
// Then we'll see if we can create a partial of the invite event itself.
|
|
// This is needed for clients to work out *who* sent the invite.
|
|
inviteEvent := synctypes.ToClientEvent(event.PDU, synctypes.FormatSync, userID)
|
|
inviteEvent.Unsigned = nil
|
|
if ev, err := json.Marshal(inviteEvent); err == nil {
|
|
res.InviteState.Events = append(res.InviteState.Events, ev)
|
|
}
|
|
|
|
return &res
|
|
}
|
|
|
|
// LeaveResponse represents a /sync response for a room which is under the 'leave' key.
|
|
type LeaveResponse struct {
|
|
State *ClientEvents `json:"state,omitempty"`
|
|
Timeline *Timeline `json:"timeline,omitempty"`
|
|
}
|
|
|
|
func (lr LeaveResponse) MarshalJSON() ([]byte, error) {
|
|
type alias LeaveResponse
|
|
a := alias(lr)
|
|
if lr.State != nil && len(lr.State.Events) == 0 {
|
|
a.State = nil
|
|
}
|
|
if lr.Timeline != nil && len(lr.Timeline.Events) == 0 {
|
|
a.Timeline = nil
|
|
}
|
|
return json.Marshal(a)
|
|
}
|
|
|
|
// NewLeaveResponse creates an empty response with initialised arrays.
|
|
func NewLeaveResponse() *LeaveResponse {
|
|
res := LeaveResponse{
|
|
State: &ClientEvents{},
|
|
Timeline: &Timeline{},
|
|
}
|
|
return &res
|
|
}
|
|
|
|
type SendToDeviceEvent struct {
|
|
gomatrixserverlib.SendToDeviceEvent
|
|
ID StreamPosition
|
|
UserID string
|
|
DeviceID string
|
|
}
|
|
|
|
type PeekingDevice struct {
|
|
UserID string
|
|
DeviceID string
|
|
}
|
|
|
|
type Peek struct {
|
|
RoomID string
|
|
New bool
|
|
Deleted bool
|
|
}
|
|
|
|
// OutputReceiptEvent is an entry in the receipt output kafka log
|
|
type OutputReceiptEvent struct {
|
|
UserID string `json:"user_id"`
|
|
RoomID string `json:"room_id"`
|
|
EventID string `json:"event_id"`
|
|
Type string `json:"type"`
|
|
Timestamp spec.Timestamp `json:"timestamp"`
|
|
}
|
|
|
|
// OutputSendToDeviceEvent is an entry in the send-to-device output kafka log.
|
|
// This contains the full event content, along with the user ID and device ID
|
|
// to which it is destined.
|
|
type OutputSendToDeviceEvent struct {
|
|
UserID string `json:"user_id"`
|
|
DeviceID string `json:"device_id"`
|
|
gomatrixserverlib.SendToDeviceEvent
|
|
}
|
|
|
|
type IgnoredUsers struct {
|
|
List map[string]interface{} `json:"ignored_users"`
|
|
}
|
|
|
|
type RelationEntry struct {
|
|
Position StreamPosition
|
|
EventID string
|
|
}
|