187 lines
6.1 KiB
JavaScript
187 lines
6.1 KiB
JavaScript
/*
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Copyright 2020 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 {createEnum} from "./utils/enum.js";
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import {orderedUnique} from "./utils/unique.js";
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const ROOMALIAS_PATTERN = /^#([^:]*):(.+)$/;
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const ROOMID_PATTERN = /^!([^:]*):(.+)$/;
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const USERID_PATTERN = /^@([^:]+):(.+)$/;
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const EVENTID_PATTERN = /^$([^:]+):(.+)$/;
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const GROUPID_PATTERN = /^\+([^:]+):(.+)$/;
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export const IdentifierKind = createEnum(
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"RoomId",
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"RoomAlias",
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"UserId",
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"GroupId",
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);
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function asPrefix(identifierKind) {
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switch (identifierKind) {
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case IdentifierKind.RoomId: return "!";
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case IdentifierKind.RoomAlias: return "#";
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case IdentifierKind.GroupId: return "+";
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case IdentifierKind.UserId: return "@";
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default: throw new Error("invalid id kind " + identifierKind);
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}
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}
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function getWebInstanceMap(queryParams) {
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const prefix = "web-instance[";
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const postfix = "]";
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const webInstanceParams = queryParams.filter(([key]) => key.startsWith(prefix) && key.endsWith(postfix));
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const webInstances = webInstanceParams.map(([key, value]) => {
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const noPrefix = key.substr(prefix.length);
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const clientId = noPrefix.substr(0, noPrefix.length - postfix.length);
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return [clientId, value];
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});
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return webInstances.reduce((map, [clientId, host]) => {
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map[clientId] = host;
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return map;
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}, {});
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}
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export function getLabelForLinkKind(kind) {
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switch (kind) {
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case LinkKind.User: return "Start chat";
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case LinkKind.Room: return "View room";
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case LinkKind.Group: return "View community";
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case LinkKind.Event: return "View message";
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}
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}
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export const LinkKind = createEnum(
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"Room",
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"User",
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"Group",
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"Event"
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)
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export class Link {
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static validateIdentifier(identifier) {
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return !!(
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USERID_PATTERN.exec(identifier) ||
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ROOMALIAS_PATTERN.exec(identifier) ||
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ROOMID_PATTERN.exec(identifier) ||
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GROUPID_PATTERN.exec(identifier)
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);
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}
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static parse(fragment) {
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if (!fragment) {
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return null;
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}
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let [linkStr, queryParamsStr] = fragment.split("?");
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let viaServers = [];
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let clientId = null;
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let webInstances = {};
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if (queryParamsStr) {
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const queryParams = queryParamsStr.split("&").map(pair => {
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const [key, value] = pair.split("=");
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return [decodeURIComponent(key), decodeURIComponent(value)];
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});
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viaServers = queryParams
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.filter(([key, value]) => key === "via")
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.map(([,value]) => value);
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const clientParam = queryParams.find(([key]) => key === "client");
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if (clientParam) {
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clientId = clientParam[1];
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}
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webInstances = getWebInstanceMap(queryParams);
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}
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if (linkStr.startsWith("#/")) {
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linkStr = linkStr.substr(2);
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}
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const [identifier, eventId] = linkStr.split("/");
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let matches;
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matches = USERID_PATTERN.exec(identifier);
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if (matches) {
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const server = matches[2];
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const localPart = matches[1];
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return new Link(clientId, viaServers, IdentifierKind.UserId, localPart, server, webInstances);
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}
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matches = ROOMALIAS_PATTERN.exec(identifier);
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if (matches) {
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const server = matches[2];
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const localPart = matches[1];
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return new Link(clientId, viaServers, IdentifierKind.RoomAlias, localPart, server, webInstances, eventId);
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}
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matches = ROOMID_PATTERN.exec(identifier);
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if (matches) {
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const server = matches[2];
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const localPart = matches[1];
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return new Link(clientId, viaServers, IdentifierKind.RoomId, localPart, server, webInstances, eventId);
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}
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matches = GROUPID_PATTERN.exec(identifier);
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if (matches) {
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const server = matches[2];
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const localPart = matches[1];
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return new Link(clientId, viaServers, IdentifierKind.GroupId, localPart, server, webInstances);
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}
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return null;
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}
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constructor(clientId, viaServers, identifierKind, localPart, server, webInstances, eventId) {
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const servers = [server];
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servers.push(...viaServers);
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this.webInstances = webInstances;
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this.servers = orderedUnique(servers);
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this.identifierKind = identifierKind;
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this.identifier = `${asPrefix(identifierKind)}${localPart}:${server}`;
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this.eventId = eventId;
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this.clientId = clientId;
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}
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get kind() {
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if (this.eventId) {
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return LinkKind.Event;
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}
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switch (this.identifierKind) {
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case IdentifierKind.RoomId:
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case IdentifierKind.RoomAlias:
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return LinkKind.Room;
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case IdentifierKind.UserId:
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return LinkKind.User;
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case IdentifierKind.GroupId:
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return LinkKind.Group;
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default:
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return null;
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}
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}
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equals(link) {
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return link &&
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link.identifier === this.identifier &&
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this.servers.length === link.servers.length &&
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this.servers.every((s, i) => link.servers[i] === s) &&
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Object.keys(this.webInstances).length === Object.keys(link.webInstances).length &&
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Object.keys(this.webInstances).every(k => this.webInstances[k] === link.webInstances[k]);
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}
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toFragment() {
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if (this.eventId) {
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return `/${this.identifier}/${this.eventId}`;
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} else {
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return `/${this.identifier}`;
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}
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}
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}
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