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--- a/includes/external/matrix/node_modules/matrix-js-sdk/src/models/event-context.ts
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-/*
-Copyright 2015 - 2021 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import { MatrixEvent } from "./event";
-import { Direction } from "./event-timeline";
-
-export class EventContext {
- private timeline: MatrixEvent[];
- private ourEventIndex = 0;
- private paginateTokens: Record<Direction, string | null> = {
- [Direction.Backward]: null,
- [Direction.Forward]: null,
- };
-
- /**
- * Construct a new EventContext
- *
- * An eventcontext is used for circumstances such as search results, when we
- * have a particular event of interest, and a bunch of events before and after
- * it.
- *
- * It also stores pagination tokens for going backwards and forwards in the
- * timeline.
- *
- * @param ourEvent - the event at the centre of this context
- */
- public constructor(public readonly ourEvent: MatrixEvent) {
- this.timeline = [ourEvent];
- }
-
- /**
- * Get the main event of interest
- *
- * This is a convenience function for getTimeline()[getOurEventIndex()].
- *
- * @returns The event at the centre of this context.
- */
- public getEvent(): MatrixEvent {
- return this.timeline[this.ourEventIndex];
- }
-
- /**
- * Get the list of events in this context
- *
- * @returns An array of MatrixEvents
- */
- public getTimeline(): MatrixEvent[] {
- return this.timeline;
- }
-
- /**
- * Get the index in the timeline of our event
- */
- public getOurEventIndex(): number {
- return this.ourEventIndex;
- }
-
- /**
- * Get a pagination token.
- *
- * @param backwards - true to get the pagination token for going
- */
- public getPaginateToken(backwards = false): string | null {
- return this.paginateTokens[backwards ? Direction.Backward : Direction.Forward];
- }
-
- /**
- * Set a pagination token.
- *
- * Generally this will be used only by the matrix js sdk.
- *
- * @param token - pagination token
- * @param backwards - true to set the pagination token for going
- * backwards in time
- */
- public setPaginateToken(token?: string, backwards = false): void {
- this.paginateTokens[backwards ? Direction.Backward : Direction.Forward] = token ?? null;
- }
-
- /**
- * Add more events to the timeline
- *
- * @param events - new events, in timeline order
- * @param atStart - true to insert new events at the start
- */
- public addEvents(events: MatrixEvent[], atStart = false): void {
- // TODO: should we share logic with Room.addEventsToTimeline?
- // Should Room even use EventContext?
-
- if (atStart) {
- this.timeline = events.concat(this.timeline);
- this.ourEventIndex += events.length;
- } else {
- this.timeline = this.timeline.concat(events);
- }
- }
-}