0bf26e95b0
* Indicate start of new messages in posts list * Use flag prop to indicate start of new messages in posts list * Declare style props with View.propTypes.style
40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
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// See License.txt for license information.
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import {Constants} from 'service/constants';
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export function isSystemMessage(post) {
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return post.type && post.type.startsWith(Constants.SYSTEM_MESSAGE_PREFIX);
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}
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export function addDatesToPostList(posts, indicateNewMessages, lastViewedAt) {
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const out = [];
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let lastDate = null;
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let subsequentPostIsUnread = false;
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let postIsUnread;
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for (const post of posts) {
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const postDate = new Date(post.create_at);
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// Push on a date header if the last post was on a different day than the current one
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if (lastDate && lastDate.toDateString() !== postDate.toDateString()) {
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out.push(lastDate);
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}
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lastDate = postDate;
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out.push(post);
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postIsUnread = post.create_at > lastViewedAt;
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if (indicateNewMessages && subsequentPostIsUnread && !postIsUnread) {
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out.push(Constants.START_OF_NEW_MESSAGES);
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}
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subsequentPostIsUnread = postIsUnread;
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}
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// Push on the date header for the oldest post
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if (lastDate) {
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out.push(lastDate);
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}
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return out;
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}
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