84 lines
3.4 KiB
Go
84 lines
3.4 KiB
Go
// Copyright 2020 The Matrix.org Foundation C.I.C.
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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 tables
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import (
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"context"
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"database/sql"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/tidwall/gjson"
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)
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type CurrentRoomState interface {
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SelectStateEvent(ctx context.Context, roomID, evType, stateKey string) (*gomatrixserverlib.HeaderedEvent, error)
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// SelectEventsWithEventIDs returns the events for the given event IDs. If the event(s) are missing, they are not returned
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// and no error is returned.
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SelectEventsWithEventIDs(ctx context.Context, txn *sql.Tx, eventIDs []string) ([]gomatrixserverlib.HeaderedEvent, error)
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// UpsertRoomState stores the given event in the database, along with an extracted piece of content.
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// The piece of content will vary depending on the event type, and table implementations may use this information to optimise
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// lookups e.g membership lookups. The mapped value of `contentVal` is outlined in ExtractContentValue. An empty `contentVal`
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// means there is nothing to store for this field.
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UpsertRoomState(ctx context.Context, txn *sql.Tx, event gomatrixserverlib.HeaderedEvent, contentVal string) error
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DeleteRoomStateByEventID(ctx context.Context, txn *sql.Tx, eventID string) error
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// SelectRoomIDsWithMembership returns the list of room IDs which have the given user in the given membership state.
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SelectRoomIDsWithMembership(ctx context.Context, txn *sql.Tx, userID string, membership string) ([]string, error)
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SelectBulkStateContent(ctx context.Context, roomIDs []string, tuples []gomatrixserverlib.StateKeyTuple, allowWildcards bool) ([]StrippedEvent, error)
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// SelectJoinedUsersSetForRooms returns the set of all users in the rooms who are joined to any of these rooms.
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SelectJoinedUsersSetForRooms(ctx context.Context, roomIDs []string) ([]string, error)
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}
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// StrippedEvent represents a stripped event for returning extracted content values.
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type StrippedEvent struct {
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RoomID string
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EventType string
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StateKey string
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ContentValue string
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}
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// ExtractContentValue from the given state event. For example, given an m.room.name event with:
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// content: { name: "Foo" }
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// this returns "Foo".
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func ExtractContentValue(ev *gomatrixserverlib.HeaderedEvent) string {
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content := ev.Content()
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key := ""
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switch ev.Type() {
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case gomatrixserverlib.MRoomCreate:
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key = "creator"
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case gomatrixserverlib.MRoomCanonicalAlias:
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key = "alias"
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case gomatrixserverlib.MRoomHistoryVisibility:
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key = "history_visibility"
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case gomatrixserverlib.MRoomJoinRules:
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key = "join_rule"
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case gomatrixserverlib.MRoomMember:
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key = "membership"
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case gomatrixserverlib.MRoomName:
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key = "name"
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case "m.room.avatar":
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key = "url"
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case "m.room.topic":
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key = "topic"
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case "m.room.guest_access":
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key = "guest_access"
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}
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result := gjson.GetBytes(content, key)
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if !result.Exists() {
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return ""
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}
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// this returns the empty string if this is not a string type
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return result.Str
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}
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