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111 lines
4.2 KiB
JavaScript
111 lines
4.2 KiB
JavaScript
/*
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Copyright 2019 The Matrix.org Foundation C.I.C.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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import PermalinkConstructor, {PermalinkParts} from "./PermalinkConstructor";
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/**
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* Generates permalinks that self-reference the running webapp
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*/
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export default class RiotPermalinkConstructor extends PermalinkConstructor {
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_riotUrl: string;
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constructor(riotUrl: string) {
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super();
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this._riotUrl = riotUrl;
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if (!this._riotUrl.startsWith("http:") && !this._riotUrl.startsWith("https:")) {
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throw new Error("Riot prefix URL does not appear to be an HTTP(S) URL");
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}
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}
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forEvent(roomId: string, eventId: string, serverCandidates: string[]): string {
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return `${this._riotUrl}/#/room/${roomId}/${eventId}${this.encodeServerCandidates(serverCandidates)}`;
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}
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forRoom(roomIdOrAlias: string, serverCandidates: string[]): string {
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return `${this._riotUrl}/#/room/${roomIdOrAlias}${this.encodeServerCandidates(serverCandidates)}`;
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}
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forUser(userId: string): string {
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return `${this._riotUrl}/#/user/${userId}`;
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}
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forGroup(groupId: string): string {
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return `${this._riotUrl}/#/group/${groupId}`;
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}
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forEntity(entityId: string): string {
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if (entityId[0] === '!' || entityId[0] === '#') {
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return this.forRoom(entityId);
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} else if (entityId[0] === '@') {
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return this.forUser(entityId);
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} else if (entityId[0] === '+') {
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return this.forGroup(entityId);
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} else throw new Error("Unrecognized entity");
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}
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isPermalinkHost(testHost: string): boolean {
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const parsedUrl = new URL(this._riotUrl);
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return testHost === (parsedUrl.host || parsedUrl.hostname); // one of the hosts should match
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}
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encodeServerCandidates(candidates: string[]) {
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if (!candidates || candidates.length === 0) return '';
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return `?via=${candidates.map(c => encodeURIComponent(c)).join("&via=")}`;
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}
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// Heavily inspired by/borrowed from the matrix-bot-sdk (with permission):
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// https://github.com/turt2live/matrix-js-bot-sdk/blob/7c4665c9a25c2c8e0fe4e509f2616505b5b66a1c/src/Permalinks.ts#L33-L61
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// Adapted for Riot's URL format
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parsePermalink(fullUrl: string): PermalinkParts {
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if (!fullUrl || !fullUrl.startsWith(this._riotUrl)) {
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throw new Error("Does not appear to be a permalink");
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}
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const parts = fullUrl.substring(`${this._riotUrl}/#/`.length).split("/");
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if (parts.length < 2) { // we're expecting an entity and an ID of some kind at least
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throw new Error("URL is missing parts");
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}
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const entityType = parts[0];
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const entity = parts[1];
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if (entityType === 'user') {
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// Probably a user, no further parsing needed.
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return PermalinkParts.forUser(entity);
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} else if (entityType === 'group') {
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// Probably a group, no further parsing needed.
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return PermalinkParts.forGroup(entity);
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} else if (entityType === 'room') {
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if (parts.length === 2) {
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return PermalinkParts.forRoom(entity, []);
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}
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// rejoin the rest because v3 events can have slashes (annoyingly)
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const eventIdAndQuery = parts.length > 2 ? parts.slice(2).join('/') : "";
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const secondaryParts = eventIdAndQuery.split("?");
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const eventId = secondaryParts[0];
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const query = secondaryParts.length > 1 ? secondaryParts[1] : "";
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// TODO: Verify Riot works with via args
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const via = query.split("via=").filter(p => !!p);
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return PermalinkParts.forEvent(entity, eventId, via);
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} else {
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throw new Error("Unknown entity type in permalink");
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}
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}
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}
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