253 lines
7.9 KiB
JavaScript
253 lines
7.9 KiB
JavaScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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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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function applySyncResponse(data, roomResponse, membership, isInitialSync) {
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if (roomResponse.summary) {
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data = updateSummary(data, roomResponse.summary);
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}
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if (membership !== data.membership) {
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data = data.cloneIfNeeded();
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data.membership = membership;
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}
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// state comes before timeline
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if (roomResponse.state) {
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data = roomResponse.state.events.reduce((data, event) => {
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return processEvent(data, event, isInitialSync);
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}, data);
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}
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if (roomResponse.timeline) {
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const {timeline} = roomResponse;
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if (timeline.prev_batch) {
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data = data.cloneIfNeeded();
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data.lastPaginationToken = timeline.prev_batch;
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}
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data = timeline.events.reduce((data, event) => {
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return processEvent(data, event, isInitialSync);
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}, data);
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}
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const unreadNotifications = roomResponse.unread_notifications;
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if (unreadNotifications) {
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data = data.cloneIfNeeded();
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data.highlightCount = unreadNotifications.highlight_count;
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data.notificationCount = unreadNotifications.notification_count;
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}
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return data;
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}
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function processEvent(data, event, isInitialSync) {
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if (event.type === "m.room.encryption") {
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if (!data.isEncrypted) {
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data = data.cloneIfNeeded();
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data.isEncrypted = true;
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}
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} else if (event.type === "m.room.name") {
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const newName = event.content?.name;
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if (newName !== data.name) {
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data = data.cloneIfNeeded();
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data.name = newName;
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}
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} else if (event.type === "m.room.avatar") {
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const newUrl = event.content?.url;
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if (newUrl !== data.avatarUrl) {
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data = data.cloneIfNeeded();
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data.avatarUrl = newUrl;
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}
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} else if (event.type === "m.room.message") {
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data = data.cloneIfNeeded();
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data.lastMessageTimestamp = event.origin_server_ts;
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if (!isInitialSync) {
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data.isUnread = true;
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}
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const {content} = event;
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const body = content?.body;
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const msgtype = content?.msgtype;
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if (msgtype === "m.text") {
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data.lastMessageBody = body;
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}
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} else if (event.type === "m.room.canonical_alias") {
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const content = event.content;
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data = data.cloneIfNeeded();
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data.canonicalAlias = content.alias;
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data.altAliases = content.alt_aliases;
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}
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return data;
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}
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function updateSummary(data, summary) {
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const heroes = summary["m.heroes"];
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const inviteCount = summary["m.joined_member_count"];
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const joinCount = summary["m.invited_member_count"];
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if (heroes) {
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data = data.cloneIfNeeded();
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data.heroes = heroes;
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}
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if (Number.isInteger(inviteCount)) {
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data = data.cloneIfNeeded();
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data.inviteCount = inviteCount;
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}
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if (Number.isInteger(joinCount)) {
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data = data.cloneIfNeeded();
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data.joinCount = joinCount;
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}
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return data;
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}
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class SummaryData {
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constructor(copy, roomId) {
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this.roomId = copy ? copy.roomId : roomId;
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this.name = copy ? copy.name : null;
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this.lastMessageBody = copy ? copy.lastMessageBody : null;
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this.lastMessageTimestamp = copy ? copy.lastMessageTimestamp : null;
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this.isUnread = copy ? copy.isUnread : false;
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this.isEncrypted = copy ? copy.isEncrypted : false;
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this.isDirectMessage = copy ? copy.isDirectMessage : false;
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this.membership = copy ? copy.membership : null;
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this.inviteCount = copy ? copy.inviteCount : 0;
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this.joinCount = copy ? copy.joinCount : 0;
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this.heroes = copy ? copy.heroes : null;
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this.canonicalAlias = copy ? copy.canonicalAlias : null;
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this.altAliases = copy ? copy.altAliases : null;
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this.hasFetchedMembers = copy ? copy.hasFetchedMembers : false;
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this.lastPaginationToken = copy ? copy.lastPaginationToken : null;
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this.avatarUrl = copy ? copy.avatarUrl : null;
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this.notificationCount = copy ? copy.notificationCount : 0;
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this.highlightCount = copy ? copy.highlightCount : 0;
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this.cloned = copy ? true : false;
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}
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cloneIfNeeded() {
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if (this.cloned) {
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return this;
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} else {
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return new SummaryData(this);
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}
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}
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serialize() {
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const {cloned, ...serializedProps} = this;
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return serializedProps;
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}
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}
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export class RoomSummary {
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constructor(roomId) {
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this._data = new SummaryData(null, roomId);
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}
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get name() {
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if (this._data.name) {
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return this._data.name;
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}
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if (this._data.canonicalAlias) {
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return this._data.canonicalAlias;
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}
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if (Array.isArray(this._data.altAliases) && this._data.altAliases.length !== 0) {
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return this._data.altAliases[0];
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}
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if (Array.isArray(this._data.heroes) && this._data.heroes.length !== 0) {
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return this._data.heroes.join(", ");
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}
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return this._data.roomId;
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}
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get isUnread() {
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return this._data.isUnread;
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}
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get lastMessage() {
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return this._data.lastMessageBody;
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}
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get lastMessageTimestamp() {
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return this._data.lastMessageTimestamp;
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}
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get inviteCount() {
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return this._data.inviteCount;
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}
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get joinCount() {
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return this._data.joinCount;
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}
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get avatarUrl() {
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return this._data.avatarUrl;
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}
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get hasFetchedMembers() {
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return this._data.hasFetchedMembers;
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}
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get lastPaginationToken() {
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return this._data.lastPaginationToken;
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}
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writeClearUnread(txn) {
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const data = new SummaryData(this._data);
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data.isUnread = false;
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data.notificationCount = 0;
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data.highlightCount = 0;
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txn.roomSummary.set(data.serialize());
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return data;
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}
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writeHasFetchedMembers(value, txn) {
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const data = new SummaryData(this._data);
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data.hasFetchedMembers = value;
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txn.roomSummary.set(data.serialize());
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return data;
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}
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writeSync(roomResponse, membership, isInitialSync, txn) {
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// clear cloned flag, so cloneIfNeeded makes a copy and
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// this._data is not modified if any field is changed.
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this._data.cloned = false;
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const data = applySyncResponse(this._data, roomResponse, membership, isInitialSync);
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if (data !== this._data) {
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// need to think here how we want to persist
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// things like unread status (as read marker, or unread count)?
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// we could very well load additional things in the load method
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// ... the trade-off is between constantly writing the summary
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// on every sync, or doing a bit of extra reading on load
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// and have in-memory only variables for visualization
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txn.roomSummary.set(data.serialize());
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return data;
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}
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}
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applyChanges(data) {
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this._data = data;
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}
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async load(summary) {
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this._data = new SummaryData(summary);
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}
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}
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export function tests() {
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return {
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"membership trigger change": function(assert) {
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const summary = new RoomSummary("id");
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let written = false;
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const changes = summary.writeSync({}, "join", {roomSummary: {set: () => { written = true; }}});
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assert(changes);
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assert(written);
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assert.equal(changes.membership, "join");
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}
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}
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}
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