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// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import React from 'react';
import SuggestionStore from 'stores/suggestion_store.jsx';
import ChannelStore from 'stores/channel_store.jsx';
import Constants from 'utils/constants.jsx';
import Suggestion from './suggestion.jsx';
const MaxChannelSuggestions = 40;
class ChannelMentionSuggestion extends Suggestion {
render() {
const isSelection = this.props.isSelection;
const item = this.props.item;
const channelName = item.channel.display_name;
const purpose = item.channel.purpose;
let className = 'mentions__name';
if (isSelection) {
className += ' suggestion--selected';
}
const description = '(~' + item.channel.name + ')';
return (
<div
className={className}
onClick={this.handleClick}
>
<div className='mention__align'>
<span>
{channelName}
</span>
<span className='mention__channelname'>
{' '}
{description}
</span>
</div>
<div className='mention__purpose'>
{purpose}
</div>
</div>
);
}
}
function filterChannelsByPrefix(channels, prefix, limit) {
const filtered = [];
for (const id of Object.keys(channels)) {
if (filtered.length >= limit) {
break;
}
const channel = channels[id];
if (channel.delete_at > 0) {
continue;
}
if (channel.display_name.toLowerCase().startsWith(prefix) || channel.name.startsWith(prefix)) {
filtered.push(channel);
}
}
return filtered;
}
export default class ChannelMentionProvider {
handlePretextChanged(suggestionId, pretext) {
const captured = (/(^|\s)(~([^~]*))$/i).exec(pretext.toLowerCase());
if (captured) {
const prefix = captured[3];
const channels = ChannelStore.getAll();
const moreChannels = ChannelStore.getMoreAll();
// Remove private channels from the list.
const publicChannels = channels.filter((channel) => {
return channel.type === 'O';
});
// Filter channels by prefix.
const filteredChannels = filterChannelsByPrefix(
publicChannels, prefix, MaxChannelSuggestions);
const filteredMoreChannels = filterChannelsByPrefix(
moreChannels, prefix, MaxChannelSuggestions - filteredChannels.length);
// Sort channels by display name.
[filteredChannels, filteredMoreChannels].forEach((items) => {
items.sort((a, b) => {
const aPrefix = a.display_name.startsWith(prefix);
const bPrefix = b.display_name.startsWith(prefix);
if (aPrefix === bPrefix) {
return a.display_name.localeCompare(b.display_name);
} else if (aPrefix) {
return -1;
}
return 1;
});
});
// Wrap channels in an outer object to avoid overwriting the 'type' property.
const wrappedChannels = filteredChannels.map((item) => {
return {
type: Constants.MENTION_CHANNELS,
channel: item
};
});
const wrappedMoreChannels = filteredMoreChannels.map((item) => {
return {
type: Constants.MENTION_MORE_CHANNELS,
channel: item
};
});
const wrapped = wrappedChannels.concat(wrappedMoreChannels);
const mentions = wrapped.map((item) => '~' + item.channel.name);
SuggestionStore.clearSuggestions(suggestionId);
SuggestionStore.addSuggestions(suggestionId, mentions, wrapped, ChannelMentionSuggestion, captured[2]);
}
}
}
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