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import {empty, filterMultipleArrays, stitchArrays} from '#sugar';
export default {
contentDependencies: [
'generateContentHeading',
'generateTrackList',
'linkGroup',
],
extraDependencies: ['html', 'language'],
query(tracks, dividingGroups) {
const groupings = new Map();
const ungroupedTracks = [];
// Entry order matters! Add blank lists for each group
// in the order that those groups are provided.
for (const group of dividingGroups) {
groupings.set(group, []);
}
for (const track of tracks) {
const firstMatchingGroup =
dividingGroups.find(group => group.albums.includes(track.album));
if (firstMatchingGroup) {
groupings.get(firstMatchingGroup).push(track);
} else {
ungroupedTracks.push(track);
}
}
const groups = Array.from(groupings.keys());
const groupedTracks = Array.from(groupings.values());
// Drop the empty lists, so just the groups which
// at least a single track matched are left.
filterMultipleArrays(
groups,
groupedTracks,
(_group, tracks) => !empty(tracks));
return {groups, groupedTracks, ungroupedTracks};
},
relations: (relation, query, tracks, groups) => ({
flatList:
(empty(groups)
? relation('generateTrackList', tracks)
: null),
contentHeading:
relation('generateContentHeading'),
groupLinks:
query.groups
.map(group => relation('linkGroup', group)),
groupedTrackLists:
query.groupedTracks
.map(tracks => relation('generateTrackList', tracks)),
ungroupedTrackList:
(empty(query.ungroupedTracks)
? null
: relation('generateTrackList', query.ungroupedTracks)),
}),
data: (query) => ({
groupNames:
query.groups
.map(group => group.name),
}),
slots: {
headingString: {
type: 'string',
},
},
generate: (data, relations, slots, {html, language}) =>
relations.flatList ??
html.tag('dl',
{[html.onlyIfContent]: true},
language.encapsulate('trackList', listCapsule => [
stitchArrays({
groupName: data.groupNames,
groupLink: relations.groupLinks,
trackList: relations.groupedTrackLists,
}).map(({
groupName,
groupLink,
trackList,
}) => [
language.encapsulate(listCapsule, 'fromGroup', capsule =>
(slots.headingString
? relations.contentHeading.clone().slots({
tag: 'dt',
title:
language.$(capsule, {
group: groupLink
}),
stickyTitle:
language.$(slots.headingString, 'sticky', 'fromGroup', {
group: groupName,
}),
})
: html.tag('dt',
language.$(capsule, {
group: groupLink
})))),
html.tag('dd', trackList),
]),
relations.ungroupedTrackList && [
language.encapsulate(listCapsule, 'fromOther', capsule =>
(slots.headingString
? relations.contentHeading.clone().slots({
tag: 'dt',
title:
language.$(capsule),
stickyTitle:
language.$(slots.headingString, 'sticky', 'fromOther'),
})
: html.tag('dt',
language.$(capsule)))),
html.tag('dd', relations.ungroupedTrackList),
],
])),
};
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