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420 lines
17 KiB
JavaScript
420 lines
17 KiB
JavaScript
/*
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Copyright 2016 OpenMarket Ltd
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Copyright 2019 The Matrix.org Foundation C.I.C.
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Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
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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 React from 'react';
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import PropTypes from 'prop-types';
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import createReactClass from 'create-react-class';
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import { _t } from '../../../languageHandler';
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import { formatCommaSeparatedList } from '../../../utils/FormattingUtils';
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import * as sdk from "../../../index";
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import {MatrixEvent} from "matrix-js-sdk";
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export default createReactClass({
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displayName: 'MemberEventListSummary',
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propTypes: {
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// An array of member events to summarise
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events: PropTypes.arrayOf(PropTypes.instanceOf(MatrixEvent)).isRequired,
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// An array of EventTiles to render when expanded
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children: PropTypes.array.isRequired,
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// The maximum number of names to show in either each summary e.g. 2 would result "A, B and 234 others left"
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summaryLength: PropTypes.number,
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// The maximum number of avatars to display in the summary
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avatarsMaxLength: PropTypes.number,
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// The minimum number of events needed to trigger summarisation
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threshold: PropTypes.number,
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// Called when the MELS expansion is toggled
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onToggle: PropTypes.func,
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// Whether or not to begin with state.expanded=true
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startExpanded: PropTypes.bool,
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},
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getDefaultProps: function() {
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return {
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summaryLength: 1,
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threshold: 3,
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avatarsMaxLength: 5,
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};
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},
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shouldComponentUpdate: function(nextProps) {
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// Update if
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// - The number of summarised events has changed
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// - or if the summary is about to toggle to become collapsed
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// - or if there are fewEvents, meaning the child eventTiles are shown as-is
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return (
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nextProps.events.length !== this.props.events.length ||
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nextProps.events.length < this.props.threshold
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);
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},
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/**
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* Generate the text for users aggregated by their transition sequences (`eventAggregates`) where
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* the sequences are ordered by `orderedTransitionSequences`.
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* @param {object[]} eventAggregates a map of transition sequence to array of user display names
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* or user IDs.
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* @param {string[]} orderedTransitionSequences an array which is some ordering of
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* `Object.keys(eventAggregates)`.
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* @returns {string} the textual summary of the aggregated events that occurred.
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*/
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_generateSummary: function(eventAggregates, orderedTransitionSequences) {
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const summaries = orderedTransitionSequences.map((transitions) => {
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const userNames = eventAggregates[transitions];
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const nameList = this._renderNameList(userNames);
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const splitTransitions = transitions.split(',');
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// Some neighbouring transitions are common, so canonicalise some into "pair"
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// transitions
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const canonicalTransitions = this._getCanonicalTransitions(splitTransitions);
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// Transform into consecutive repetitions of the same transition (like 5
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// consecutive 'joined_and_left's)
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const coalescedTransitions = this._coalesceRepeatedTransitions(
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canonicalTransitions,
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);
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const descs = coalescedTransitions.map((t) => {
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return this._getDescriptionForTransition(
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t.transitionType, userNames.length, t.repeats,
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);
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});
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const desc = formatCommaSeparatedList(descs);
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return _t('%(nameList)s %(transitionList)s', { nameList: nameList, transitionList: desc });
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});
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if (!summaries) {
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return null;
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}
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return summaries.join(", ");
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},
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/**
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* @param {string[]} users an array of user display names or user IDs.
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* @returns {string} a comma-separated list that ends with "and [n] others" if there are
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* more items in `users` than `this.props.summaryLength`, which is the number of names
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* included before "and [n] others".
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*/
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_renderNameList: function(users) {
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return formatCommaSeparatedList(users, this.props.summaryLength);
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},
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/**
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* Canonicalise an array of transitions such that some pairs of transitions become
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* single transitions. For example an input ['joined','left'] would result in an output
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* ['joined_and_left'].
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* @param {string[]} transitions an array of transitions.
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* @returns {string[]} an array of transitions.
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*/
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_getCanonicalTransitions: function(transitions) {
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const modMap = {
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'joined': {
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'after': 'left',
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'newTransition': 'joined_and_left',
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},
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'left': {
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'after': 'joined',
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'newTransition': 'left_and_joined',
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},
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// $currentTransition : {
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// 'after' : $nextTransition,
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// 'newTransition' : 'new_transition_type',
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// },
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};
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const res = [];
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for (let i = 0; i < transitions.length; i++) {
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const t = transitions[i];
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const t2 = transitions[i + 1];
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let transition = t;
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if (i < transitions.length - 1 && modMap[t] && modMap[t].after === t2) {
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transition = modMap[t].newTransition;
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i++;
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}
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res.push(transition);
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}
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return res;
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},
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/**
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* Transform an array of transitions into an array of transitions and how many times
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* they are repeated consecutively.
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*
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* An array of 123 "joined_and_left" transitions, would result in:
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* ```
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* [{
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* transitionType: "joined_and_left"
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* repeats: 123
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* }]
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* ```
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* @param {string[]} transitions the array of transitions to transform.
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* @returns {object[]} an array of coalesced transitions.
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*/
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_coalesceRepeatedTransitions: function(transitions) {
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const res = [];
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for (let i = 0; i < transitions.length; i++) {
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if (res.length > 0 && res[res.length - 1].transitionType === transitions[i]) {
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res[res.length - 1].repeats += 1;
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} else {
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res.push({
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transitionType: transitions[i],
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repeats: 1,
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});
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}
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}
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return res;
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},
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/**
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* For a certain transition, t, describe what happened to the users that
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* underwent the transition.
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* @param {string} t the transition type.
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* @param {number} userCount number of usernames
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* @param {number} repeats the number of times the transition was repeated in a row.
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* @returns {string} the written Human Readable equivalent of the transition.
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*/
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_getDescriptionForTransition(t, userCount, repeats) {
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// The empty interpolations 'severalUsers' and 'oneUser'
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// are there only to show translators to non-English languages
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// that the verb is conjugated to plural or singular Subject.
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let res = null;
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switch (t) {
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case "joined":
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res = (userCount > 1)
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? _t("%(severalUsers)sjoined %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)sjoined %(count)s times", { oneUser: "", count: repeats });
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break;
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case "left":
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res = (userCount > 1)
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? _t("%(severalUsers)sleft %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)sleft %(count)s times", { oneUser: "", count: repeats });
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break;
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case "joined_and_left":
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res = (userCount > 1)
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? _t("%(severalUsers)sjoined and left %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)sjoined and left %(count)s times", { oneUser: "", count: repeats });
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break;
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case "left_and_joined":
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res = (userCount > 1)
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? _t("%(severalUsers)sleft and rejoined %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)sleft and rejoined %(count)s times", { oneUser: "", count: repeats });
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break;
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case "invite_reject":
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res = (userCount > 1)
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? _t("%(severalUsers)srejected their invitations %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)srejected their invitation %(count)s times", { oneUser: "", count: repeats });
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break;
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case "invite_withdrawal":
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res = (userCount > 1)
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? _t("%(severalUsers)shad their invitations withdrawn %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)shad their invitation withdrawn %(count)s times", { oneUser: "", count: repeats });
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break;
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case "invited":
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res = (userCount > 1)
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? _t("were invited %(count)s times", { count: repeats })
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: _t("was invited %(count)s times", { count: repeats });
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break;
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case "banned":
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res = (userCount > 1)
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? _t("were banned %(count)s times", { count: repeats })
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: _t("was banned %(count)s times", { count: repeats });
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break;
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case "unbanned":
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res = (userCount > 1)
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? _t("were unbanned %(count)s times", { count: repeats })
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: _t("was unbanned %(count)s times", { count: repeats });
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break;
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case "kicked":
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res = (userCount > 1)
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? _t("were kicked %(count)s times", { count: repeats })
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: _t("was kicked %(count)s times", { count: repeats });
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break;
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case "changed_name":
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res = (userCount > 1)
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? _t("%(severalUsers)schanged their name %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)schanged their name %(count)s times", { oneUser: "", count: repeats });
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break;
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case "changed_avatar":
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res = (userCount > 1)
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? _t("%(severalUsers)schanged their avatar %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)schanged their avatar %(count)s times", { oneUser: "", count: repeats });
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break;
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case "no_change":
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res = (userCount > 1)
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? _t("%(severalUsers)smade no changes %(count)s times", { severalUsers: "", count: repeats })
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: _t("%(oneUser)smade no changes %(count)s times", { oneUser: "", count: repeats });
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break;
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}
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return res;
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},
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_getTransitionSequence: function(events) {
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return events.map(this._getTransition);
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},
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/**
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* Label a given membership event, `e`, where `getContent().membership` has
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* changed for each transition allowed by the Matrix protocol. This attempts to
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* label the membership changes that occur in `../../../TextForEvent.js`.
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* @param {MatrixEvent} e the membership change event to label.
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* @returns {string?} the transition type given to this event. This defaults to `null`
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* if a transition is not recognised.
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*/
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_getTransition: function(e) {
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if (e.mxEvent.getType() === 'm.room.third_party_invite') {
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// Handle 3pid invites the same as invites so they get bundled together
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return 'invited';
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}
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switch (e.mxEvent.getContent().membership) {
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case 'invite': return 'invited';
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case 'ban': return 'banned';
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case 'join':
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if (e.mxEvent.getPrevContent().membership === 'join') {
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if (e.mxEvent.getContent().displayname !==
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e.mxEvent.getPrevContent().displayname) {
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return 'changed_name';
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} else if (e.mxEvent.getContent().avatar_url !==
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e.mxEvent.getPrevContent().avatar_url) {
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return 'changed_avatar';
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}
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// console.log("MELS ignoring duplicate membership join event");
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return 'no_change';
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} else {
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return 'joined';
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}
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case 'leave':
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if (e.mxEvent.getSender() === e.mxEvent.getStateKey()) {
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switch (e.mxEvent.getPrevContent().membership) {
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case 'invite': return 'invite_reject';
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default: return 'left';
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}
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}
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switch (e.mxEvent.getPrevContent().membership) {
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case 'invite': return 'invite_withdrawal';
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case 'ban': return 'unbanned';
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// sender is not target and made the target leave, if not from invite/ban then this is a kick
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default: return 'kicked';
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}
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default: return null;
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}
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},
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_getAggregate: function(userEvents) {
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// A map of aggregate type to arrays of display names. Each aggregate type
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// is a comma-delimited string of transitions, e.g. "joined,left,kicked".
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// The array of display names is the array of users who went through that
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// sequence during eventsToRender.
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const aggregate = {
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// $aggregateType : []:string
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};
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// A map of aggregate types to the indices that order them (the index of
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// the first event for a given transition sequence)
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const aggregateIndices = {
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// $aggregateType : int
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};
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const users = Object.keys(userEvents);
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users.forEach(
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(userId) => {
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const firstEvent = userEvents[userId][0];
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const displayName = firstEvent.displayName;
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const seq = this._getTransitionSequence(userEvents[userId]);
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if (!aggregate[seq]) {
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aggregate[seq] = [];
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aggregateIndices[seq] = -1;
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}
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aggregate[seq].push(displayName);
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if (aggregateIndices[seq] === -1 ||
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firstEvent.index < aggregateIndices[seq]) {
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aggregateIndices[seq] = firstEvent.index;
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}
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},
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);
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return {
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names: aggregate,
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indices: aggregateIndices,
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};
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},
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render: function() {
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const eventsToRender = this.props.events;
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// Map user IDs to an array of objects:
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const userEvents = {
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// $userId : [{
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// // The original event
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// mxEvent: e,
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// // The display name of the user (if not, then user ID)
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// displayName: e.target.name || userId,
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// // The original index of the event in this.props.events
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// index: index,
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// }]
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};
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const avatarMembers = [];
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eventsToRender.forEach((e, index) => {
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const userId = e.getStateKey();
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// Initialise a user's events
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if (!userEvents[userId]) {
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userEvents[userId] = [];
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if (e.target) avatarMembers.push(e.target);
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}
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let displayName = userId;
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if (e.getType() === 'm.room.third_party_invite') {
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displayName = e.getContent().display_name;
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} else if (e.target) {
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displayName = e.target.name;
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}
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userEvents[userId].push({
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mxEvent: e,
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displayName,
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index: index,
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});
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});
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const aggregate = this._getAggregate(userEvents);
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// Sort types by order of lowest event index within sequence
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const orderedTransitionSequences = Object.keys(aggregate.names).sort(
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(seq1, seq2) => aggregate.indices[seq1] > aggregate.indices[seq2],
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);
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const EventListSummary = sdk.getComponent("views.elements.EventListSummary");
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return <EventListSummary
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events={this.props.events}
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threshold={this.props.threshold}
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onToggle={this.props.onToggle}
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startExpanded={this.props.startExpanded}
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children={this.props.children}
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summaryMembers={avatarMembers}
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summaryText={this._generateSummary(aggregate.names, orderedTransitionSequences)} />;
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},
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});
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