state

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 Go to latest Published: Apr 1, 2022 License: Apache-2.0 Imports: 12 Imported by: 0

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Constants

View Source 
const (
	EventsStart = -1
	EventsEnd   = math.MaxInt64 - 1
)
View Source 
const AccountDataGlobalRoom = ""
View Source 
const MaxPostgresParameters = 65535

Max number of parameters in a single SQL command

Variables

This section is empty.

Functions

This section is empty.

Types

type AccountData 

type AccountData struct {
	UserID string `db:"user_id"`
	RoomID string `db:"room_id"`
	Type   string `db:"type"`
	Data   []byte `db:"data"`
}

type AccountDataChunker 

type AccountDataChunker []AccountData

func (AccountDataChunker) Len 

func (c AccountDataChunker) Len() int

func (AccountDataChunker) Subslice 

func (c AccountDataChunker) Subslice(i, j int) sqlutil.Chunker

type AccountDataTable 

type AccountDataTable struct{}

AccountDataTable stores the account data for users.

func NewAccountDataTable 

func NewAccountDataTable(db *sqlx.DB) *AccountDataTable

func (*AccountDataTable) Insert 

func (t *AccountDataTable) Insert(txn *sqlx.Tx, accDatas []AccountData) ([]AccountData, error)

Insert account data.

func (*AccountDataTable) Select 

func (t *AccountDataTable) Select(txn *sqlx.Tx, userID, eventType, roomID string) (*AccountData, error)

func (*AccountDataTable) SelectMany 

func (t *AccountDataTable) SelectMany(txn *sqlx.Tx, userID string, roomIDs ...string) (datas []AccountData, err error)

type Accumulator 

type Accumulator struct {
	// contains filtered or unexported fields
}

Accumulator tracks room state and timelines.

In order for it to remain simple(ish), the accumulator DOES NOT SUPPORT arbitrary timeline gaps. There is an Initialise function for new rooms (with some pre-determined state) and then a constant Accumulate function for timeline events. v2 sync must be called with a large enough timeline.limit for this to work!

func NewAccumulator 

func NewAccumulator(db *sqlx.DB) *Accumulator

func (*Accumulator) Accumulate 

func (a *Accumulator) Accumulate(roomID string, prevBatch string, timeline []json.RawMessage) (numNew int, latestNID int64, err error)

Accumulate internal state from a user's sync response. The timeline order MUST be in the order received from the server. Returns the number of new events in the timeline.

This function does several things:

  • It ensures all events are persisted in the database. This is shared amongst users.
  • If all events have been stored before, then it short circuits and returns. This is because we must have already processed this part of the timeline in order for the event to exist in the database, and the sync stream is already linearised for us.
  • Else it creates a new room state snapshot if the timeline contains state events (as this now represents the current state)
  • It adds entries to the membership log for membership events.

func (*Accumulator) Delta 

func (a *Accumulator) Delta(roomID string, lastEventNID int64, limit int) (eventsJSON []json.RawMessage, latest int64, err error)

Delta returns a list of events of at most `limit` for the room not including `lastEventNID`. Returns the latest NID of the last event (most recent)

func (*Accumulator) Initialise 

func (a *Accumulator) Initialise(roomID string, state []json.RawMessage) (bool, error)

Initialise starts a new sync accumulator for the given room using the given state as a baseline. This will only take effect if this is the first time the v3 server has seen this room, and it wasn't possible to get all events up to the create event (e.g Matrix HQ). Returns true if this call actually added new events

This function: - Stores these events - Sets up the current snapshot based on the state list given.

type Event 

type Event struct {
	NID        int64  `db:"event_nid"`
	Type       string `db:"event_type"`
	StateKey   string `db:"state_key"`
	Membership string `db:"membership"`
	// This is a snapshot ID which corresponds to some room state BEFORE this event has been applied.
	BeforeStateSnapshotID int    `db:"before_state_snapshot_id"`
	ID                    string `db:"event_id"`
	RoomID                string `db:"room_id"`
	// not all events include a prev batch (e.g if it was part of state not timeline, and only the first
	// event in a timeline has a prev_batch attached), but we'll look for the 'closest' prev batch
	// when returning these tokens to the caller (closest = next newest, assume clients de-dupe)
	PrevBatch sql.NullString `db:"prev_batch"`
	// stripped events will be missing this field
	JSON []byte `db:"event"`
}

type EventChunker 

type EventChunker []Event

func (EventChunker) Len 

func (c EventChunker) Len() int

func (EventChunker) Subslice 

func (c EventChunker) Subslice(i, j int) sqlutil.Chunker

type EventTable 

type EventTable struct {
	// contains filtered or unexported fields
}

EventTable stores events. A unique numeric ID is associated with each event.

func NewEventTable 

func NewEventTable(db *sqlx.DB) *EventTable

NewEventTable makes a new EventTable

func (*EventTable) BeforeStateSnapshotIDForEventNID 

func (t *EventTable) BeforeStateSnapshotIDForEventNID(txn *sqlx.Tx, roomID string, eventNID int64) (lastEventNID, replacesNID, snapID int64, err error)

func (*EventTable) Insert 

func (t *EventTable) Insert(txn *sqlx.Tx, events []Event, checkFields bool) (int, error)

Insert events into the event table. Returns the number of rows added. If the number of rows is >0, and the list of events is in sync stream order, it can be inferred that the last element(s) are new.

func (*EventTable) SelectByIDs 

func (t *EventTable) SelectByIDs(txn *sqlx.Tx, verifyAll bool, ids []string) (events []Event, err error)

func (*EventTable) SelectByNIDs 

func (t *EventTable) SelectByNIDs(txn *sqlx.Tx, verifyAll bool, nids []int64) (events []Event, err error)

func (*EventTable) SelectClosestPrevBatch 

func (t *EventTable) SelectClosestPrevBatch(roomID string, eventNID int64) (prevBatch string, err error)

Select the closest prev batch token for the provided event NID. Returns the empty string if there is no closest.

func (*EventTable) SelectClosestPrevBatchByID 

func (t *EventTable) SelectClosestPrevBatchByID(roomID string, eventID string) (prevBatch string, err error)

SelectClosestPrevBatchByID is the same as SelectClosestPrevBatch but works on event IDs not NIDs

func (*EventTable) SelectEventNIDsWithTypeInRoom 

func (t *EventTable) SelectEventNIDsWithTypeInRoom(txn *sqlx.Tx, eventType string, limit int, targetRoom string, lowerExclusive, upperInclusive int64) (eventNIDs []int64, err error)

Select all events matching the given event type in a room. Used to implement the room member stream (paginated room lists)

func (*EventTable) SelectEventsBetween 

func (t *EventTable) SelectEventsBetween(txn *sqlx.Tx, roomID string, lowerExclusive, upperInclusive int64, limit int) ([]Event, error)

func (*EventTable) SelectEventsWithTypeStateKey 

func (t *EventTable) SelectEventsWithTypeStateKey(eventType, stateKey string, lowerExclusive, upperInclusive int64) ([]Event, error)

Select all events between the bounds matching the type, state_key given. Used to work out which rooms the user was joined to at a given point in time.

func (*EventTable) SelectEventsWithTypeStateKeyInRooms 

func (t *EventTable) SelectEventsWithTypeStateKeyInRooms(roomIDs []string, eventType, stateKey string, lowerExclusive, upperInclusive int64) ([]Event, error)

Select all events between the bounds matching the type, state_key given, in the rooms specified only. Used to work out which rooms the user was joined to at a given point in time.

func (*EventTable) SelectHighestNID 

func (t *EventTable) SelectHighestNID() (highest int64, err error)

func (*EventTable) SelectLatestEventsBetween 

func (t *EventTable) SelectLatestEventsBetween(txn *sqlx.Tx, roomID string, lowerExclusive, upperInclusive int64, limit int) ([]Event, error)

func (*EventTable) SelectNIDsByIDs 

func (t *EventTable) SelectNIDsByIDs(txn *sqlx.Tx, ids []string) (nids []int64, err error)

func (*EventTable) SelectStrippedEventsByIDs 

func (t *EventTable) SelectStrippedEventsByIDs(txn *sqlx.Tx, verifyAll bool, ids []string) (StrippedEvents, error)

func (*EventTable) SelectStrippedEventsByNIDs 

func (t *EventTable) SelectStrippedEventsByNIDs(txn *sqlx.Tx, verifyAll bool, nids []int64) (StrippedEvents, error)

func (*EventTable) UpdateBeforeSnapshotID 

func (t *EventTable) UpdateBeforeSnapshotID(txn *sqlx.Tx, eventNID, snapID, replacesNID int64) error

UpdateBeforeSnapshotID sets the before_state_snapshot_id field to `snapID` for the given NIDs.

type InvitesTable 

type InvitesTable struct {
	// contains filtered or unexported fields
}

InvitesTable stores invites for each user. Originally, invites were stored with the main events in a room. We ignored stripped state and just kept the m.room.member invite event. This had many problems though:

  • The room would be initialised by the invite event, causing the room to not populate with state correctly when the user joined the room.
  • The user could read room data in the room without being joined to the room e.g could pull `required_state` and `timeline` as they would be authorised by the invite to see this data.

Instead, we now completely split out invites from the normal event flow. This fixes the issues outlined above but introduce more problems:

  • How do you sort the invite with rooms?
  • How do you calculate the room name when you lack heroes?

For now, we say that invites:

  • are treated as a highlightable event for the purposes of sorting by highlight count.
  • are given the timestamp of when the invite arrived.
  • calculate the room name on a best-effort basis given the lack of heroes (same as element-web).

When an invite is rejected, it appears in the `leave` section which then causes the invite to be removed from this table.

func NewInvitesTable 

func NewInvitesTable(db *sqlx.DB) *InvitesTable

func (*InvitesTable) InsertInvite 

func (t *InvitesTable) InsertInvite(userID, roomID string, inviteRoomState []json.RawMessage) error

func (*InvitesTable) RemoveInvite 

func (t *InvitesTable) RemoveInvite(userID, roomID string) error

func (*InvitesTable) SelectAllInvitesForUser 

func (t *InvitesTable) SelectAllInvitesForUser(userID string) (map[string][]json.RawMessage, error)

Select all invites for this user. Returns a map of room ID to invite_state (json array).

type RoomsTable 

type RoomsTable struct{}

RoomsTable stores the current snapshot for a room.

func NewRoomsTable 

func NewRoomsTable(db *sqlx.DB) *RoomsTable

func (*RoomsTable) CurrentAfterSnapshotID 

func (t *RoomsTable) CurrentAfterSnapshotID(txn *sqlx.Tx, roomID string) (snapshotID int64, err error)

Return the snapshot for this room AFTER the latest event has been applied.

func (*RoomsTable) SelectEncryptedRooms 

func (t *RoomsTable) SelectEncryptedRooms(txn *sqlx.Tx) (encrypted []string, err error)

func (*RoomsTable) SelectTombstonedRooms 

func (t *RoomsTable) SelectTombstonedRooms(txn *sqlx.Tx) (tombstones []string, err error)

func (*RoomsTable) UpdateCurrentAfterSnapshotID 

func (t *RoomsTable) UpdateCurrentAfterSnapshotID(txn *sqlx.Tx, roomID string, snapshotID int64, isEncrypted, isTombstoned bool) (err error)

type SnapshotRow 

type SnapshotRow struct {
	SnapshotID int64         `db:"snapshot_id"`
	RoomID     string        `db:"room_id"`
	Events     pq.Int64Array `db:"events"`
}

type SnapshotTable 

type SnapshotTable struct {
	// contains filtered or unexported fields
}

SnapshotTable stores room state snapshots. Each snapshot has a unique numeric ID. Not every event will be associated with a snapshot.

func NewSnapshotsTable 

func NewSnapshotsTable(db *sqlx.DB) *SnapshotTable

func (*SnapshotTable) CurrentSnapshots 

func (t *SnapshotTable) CurrentSnapshots() (map[string][]int64, error)

func (*SnapshotTable) Delete 

func (s *SnapshotTable) Delete(txn *sqlx.Tx, snapshotIDs []int64) error

Delete the snapshot IDs given

func (*SnapshotTable) Insert 

func (s *SnapshotTable) Insert(txn *sqlx.Tx, row *SnapshotRow) error

Insert the row. Modifies SnapshotID to be the inserted primary key.

func (*SnapshotTable) Select 

func (s *SnapshotTable) Select(txn *sqlx.Tx, snapshotID int64) (row SnapshotRow, err error)

Select a row based on its snapshot ID.

type Storage 

type Storage struct {
	EventsTable      *EventTable
	TypingTable      *TypingTable
	ToDeviceTable    *ToDeviceTable
	UnreadTable      *UnreadTable
	AccountDataTable *AccountDataTable
	InvitesTable     *InvitesTable
	// contains filtered or unexported fields
}

func NewStorage 

func NewStorage(postgresURI string) *Storage

func (*Storage) AccountData 

func (s *Storage) AccountData(userID, roomID, eventType string) (data *AccountData, err error)

func (*Storage) AccountDatas 

func (s *Storage) AccountDatas(userID string, roomIDs ...string) (datas []AccountData, err error)

Pull out all account data for this user. If roomIDs is empty, global account data is returned. If roomIDs is non-empty, all account data for these rooms are extracted.

func (*Storage) Accumulate 

func (s *Storage) Accumulate(roomID, prevBatch string, timeline []json.RawMessage) (numNew int, latestNID int64, err error)

func (*Storage) AllJoinedMembers 

func (s *Storage) AllJoinedMembers() (map[string][]string, error)

func (*Storage) Initialise 

func (s *Storage) Initialise(roomID string, state []json.RawMessage) (bool, error)

func (*Storage) InsertAccountData 

func (s *Storage) InsertAccountData(userID, roomID string, events []json.RawMessage) (data []AccountData, err error)

func (*Storage) JoinedRoomsAfterPosition 

func (s *Storage) JoinedRoomsAfterPosition(userID string, pos int64) ([]string, error)

func (*Storage) LatestEventNID 

func (s *Storage) LatestEventNID() (int64, error)

func (*Storage) LatestEventsInRooms 

func (s *Storage) LatestEventsInRooms(userID string, roomIDs []string, to int64, limit int) (map[string][]json.RawMessage, map[string]string, error)

func (*Storage) LatestTypingID 

func (s *Storage) LatestTypingID() (int64, error)

func (*Storage) MetadataForAllRooms 

func (s *Storage) MetadataForAllRooms() (map[string]internal.RoomMetadata, error)

Extract hero info for all rooms. MUST BE CALLED AT STARTUP ONLY AS THIS WILL RACE WITH LIVE TRAFFIC.

func (*Storage) RoomMembershipDelta 

func (s *Storage) RoomMembershipDelta(roomID string, from, to int64, limit int) (eventJSON []json.RawMessage, upTo int64, err error)

func (*Storage) RoomStateAfterEventPosition 

func (s *Storage) RoomStateAfterEventPosition(roomID string, pos int64, eventTypes ...string) (events []Event, err error)

func (*Storage) RoomStateBeforeEventPosition 

func (s *Storage) RoomStateBeforeEventPosition(roomID string, pos int64) (events []Event, err error)

func (*Storage) VisibleEventNIDsBetween 

func (s *Storage) VisibleEventNIDsBetween(userID string, from, to int64) (map[string][][2]int64, error)

Work out the NID ranges to pull events from for this user. Given a from and to event nid stream position, this function returns a map of room ID to a slice of 2-element from|to positions. These positions are all INCLUSIVE, and the client should be informed of these events at some point. For example: 

                  Stream Positions
        1     2   3    4   5   6   7   8   9   10
Room A  Maj   E   E                E
Room B                 E   Maj E
Room C                                 E   Mal E   (a already joined to this room at position 0)

E=message event, M=membership event, followed by user letter, followed by 'i' or 'j' or 'l' for invite|join|leave

- For Room A: from=1, to=10, returns { RoomA: [ [1,10] ]}  (tests events in joined room)
- For Room B: from=1, to=10, returns { RoomB: [ [5,10] ]}  (tests joining a room starts events)
- For Room C: from=1, to=10, returns { RoomC: [ [0,9] ]}  (tests leaving a room stops events)

Multiple slices can occur when a user leaves and re-joins the same room, and invites are same-element positions: 

                   Stream Positions
         1     2   3    4   5   6   7   8   9   10  11  12  13  14  15
 Room D  Maj                E   Mal E   Maj E   Mal E
 Room E        E   Mai  E                               E   Maj E   E

- For Room D: from=1, to=15 returns { RoomD: [ [1,6], [8,10] ] } (tests multi-join/leave)
- For Room E: from=1, to=15 returns { RoomE: [ [3,3], [13,15] ] } (tests invites)

type StrippedEvents 

type StrippedEvents []Event

func (StrippedEvents) NIDs 

func (se StrippedEvents) NIDs() (result []int64)

type ToDeviceRow 

type ToDeviceRow struct {
	Position int64  `db:"position"`
	DeviceID string `db:"device_id"`
	Message  string `db:"message"`
	Type     string `db:"event_type"`
	Sender   string `db:"sender"`
}

type ToDeviceRowChunker 

type ToDeviceRowChunker []ToDeviceRow

func (ToDeviceRowChunker) Len 

func (c ToDeviceRowChunker) Len() int

func (ToDeviceRowChunker) Subslice 

func (c ToDeviceRowChunker) Subslice(i, j int) sqlutil.Chunker

type ToDeviceTable 

type ToDeviceTable struct {
	// contains filtered or unexported fields
}

ToDeviceTable stores to_device messages for devices.

func NewToDeviceTable 

func NewToDeviceTable(db *sqlx.DB) *ToDeviceTable

func (*ToDeviceTable) DeleteMessagesUpToAndIncluding 

func (t *ToDeviceTable) DeleteMessagesUpToAndIncluding(deviceID string, toIncl int64) error

func (*ToDeviceTable) InsertMessages 

func (t *ToDeviceTable) InsertMessages(deviceID string, msgs []json.RawMessage) (pos int64, err error)

func (*ToDeviceTable) Messages 

func (t *ToDeviceTable) Messages(deviceID string, from, to, limit int64) (msgs []json.RawMessage, upTo int64, err error)

Query to-device messages for this device, exclusive of from and inclusive of to. If a to value is unknown, use -1.

type TypingTable 

type TypingTable struct {
	// contains filtered or unexported fields
}

TypingTable stores who is currently typing TODO: If 2 users are in the same room and 1 is on a laggy synchotron, we'll flip flop who is typing with live / stale data. Maybe do this per user per room?

func NewTypingTable 

func NewTypingTable(db *sqlx.DB) *TypingTable

func (*TypingTable) SelectHighestID 

func (t *TypingTable) SelectHighestID() (id int64, err error)

func (*TypingTable) SetTyping 

func (t *TypingTable) SetTyping(roomID string, userIDs []string) (position int64, err error)

func (*TypingTable) Typing 

func (t *TypingTable) Typing(roomID string, fromStreamIDExcl, toStreamIDIncl int64) (userIDs []string, latest int64, err error)

type UnreadTable 

type UnreadTable struct {
	// contains filtered or unexported fields
}

UnreadTable stores unread counts per-user

func NewUnreadTable 

func NewUnreadTable(db *sqlx.DB) *UnreadTable

func (*UnreadTable) SelectAllNonZeroCountsForUser 

func (t *UnreadTable) SelectAllNonZeroCountsForUser(userID string, callback func(roomID string, highlightCount, notificationCount int)) error

func (*UnreadTable) SelectUnreadCounters 

func (t *UnreadTable) SelectUnreadCounters(userID, roomID string) (highlightCount, notificationCount int, err error)

func (*UnreadTable) UpdateUnreadCounters 

func (t *UnreadTable) UpdateUnreadCounters(userID, roomID string, highlightCount, notificationCount *int) error

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