95 lines
3.6 KiB
JavaScript
95 lines
3.6 KiB
JavaScript
/*
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Copyright 2019 New Vector Ltd
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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 { EventStatus } from 'matrix-js-sdk';
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import {MatrixClientPeg} from '../MatrixClientPeg';
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import shouldHideEvent from "../shouldHideEvent";
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/**
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* Returns whether an event should allow actions like reply, reactions, edit, etc.
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* which effectively checks whether it's a regular message that has been sent and that we
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* can display.
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*
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* @param {MatrixEvent} mxEvent The event to check
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* @returns {boolean} true if actionable
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*/
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export function isContentActionable(mxEvent) {
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const { status: eventStatus } = mxEvent;
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// status is SENT before remote-echo, null after
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const isSent = !eventStatus || eventStatus === EventStatus.SENT;
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if (isSent && !mxEvent.isRedacted()) {
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if (mxEvent.getType() === 'm.room.message') {
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const content = mxEvent.getContent();
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if (content.msgtype && content.msgtype !== 'm.bad.encrypted' && content.hasOwnProperty('body')) {
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return true;
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}
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} else if (mxEvent.getType() === 'm.sticker') {
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return true;
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}
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}
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return false;
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}
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export function canEditContent(mxEvent) {
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if (mxEvent.status === EventStatus.CANCELLED || mxEvent.getType() !== "m.room.message" || mxEvent.isRedacted()) {
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return false;
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}
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const content = mxEvent.getOriginalContent();
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const {msgtype} = content;
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return (msgtype === "m.text" || msgtype === "m.emote") &&
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content.body && typeof content.body === 'string' &&
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mxEvent.getSender() === MatrixClientPeg.get().getUserId();
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}
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export function canEditOwnEvent(mxEvent) {
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// for now we only allow editing
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// your own events. So this just call through
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// In the future though, moderators will be able to
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// edit other people's messages as well but we don't
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// want findEditableEvent to return other people's events
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// hence this method.
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return canEditContent(mxEvent);
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}
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const MAX_JUMP_DISTANCE = 100;
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export function findEditableEvent(room, isForward, fromEventId = undefined) {
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const liveTimeline = room.getLiveTimeline();
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const events = liveTimeline.getEvents().concat(room.getPendingEvents());
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const maxIdx = events.length - 1;
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const inc = isForward ? 1 : -1;
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const beginIdx = isForward ? 0 : maxIdx;
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let endIdx = isForward ? maxIdx : 0;
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if (!fromEventId) {
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endIdx = Math.min(Math.max(0, beginIdx + (inc * MAX_JUMP_DISTANCE)), maxIdx);
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}
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let foundFromEventId = !fromEventId;
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for (let i = beginIdx; i !== (endIdx + inc); i += inc) {
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const e = events[i];
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// find start event first
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if (!foundFromEventId && e.getId() === fromEventId) {
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foundFromEventId = true;
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// don't look further than MAX_JUMP_DISTANCE events from `fromEventId`
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// to not iterate potentially 1000nds of events on key up/down
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endIdx = Math.min(Math.max(0, i + (inc * MAX_JUMP_DISTANCE)), maxIdx);
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} else if (foundFromEventId && !shouldHideEvent(e) && canEditOwnEvent(e)) {
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// otherwise look for editable event
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return e;
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}
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}
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}
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