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import {empty} from '#sugar';
export default {
contentDependencies: [
'generatePreviousNextLinks',
'linkFlash',
],
extraDependencies: ['html', 'language', 'wikiData'],
sprawl({flashActData}) {
return {flashActData};
},
query(sprawl, flash) {
// Don't sort chronologically here. The previous/next buttons should match
// the order in the sidebar, by act rather than date.
const flashes =
sprawl.flashActData
.flatMap(act => act.flashes);
const index = flashes.indexOf(flash);
const previousFlash =
(index > 0
? flashes[index - 1]
: null);
const nextFlash =
(index < flashes.length - 1
? flashes[index + 1]
: null);
return {previousFlash, nextFlash};
},
relations(relation, query) {
const relations = {};
if (query.previousFlash || query.nextFlash) {
relations.previousNextLinks =
relation('generatePreviousNextLinks');
relations.previousFlashLink =
(query.previousFlash
? relation('linkFlash', query.previousFlash)
: null);
relations.nextFlashLink =
(query.nextFlash
? relation('linkFlash', query.nextFlash)
: null);
}
return relations;
},
slots: {
showFlashNavigation: {type: 'boolean', default: false},
},
generate(relations, slots, {html, language}) {
const {content: previousNextLinks = []} =
slots.showFlashNavigation &&
relations.previousNextLinks &&
relations.previousNextLinks.slots({
previousLink: relations.previousFlashLink,
nextLink: relations.nextFlashLink,
});
const allLinks = [
...previousNextLinks,
].filter(Boolean);
if (empty(allLinks)) {
return html.blank();
}
return `(${language.formatUnitList(allLinks)})`;
},
};
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