/
punctuateSeries.js
37 lines (34 loc) · 1.13 KB
/
punctuateSeries.js
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import app from '../../common/app';
/**
* The `punctuateSeries` helper formats a list of strings (e.g. names) to read
* fluently in the application's locale.
*
* ```js
* punctuateSeries(['Toby', 'Franz', 'Dominion']) // Toby, Franz, and Dominion
* ```
*
* @param {import('mithril').Children[]} items
* @return {import('mithril').Children}')}
*/
export default function punctuateSeries(items) {
if (items.length === 2) {
return app.translator.trans('core.lib.series.two_text', {
first: items[0],
second: items[1],
});
} else if (items.length >= 3) {
// If there are three or more items, we will join all but the first and
// last items with the equivalent of a comma, and then we will feed that
// into the translator along with the first and last item.
const second = items
.slice(1, items.length - 1)
.reduce((list, item) => list.concat([item, app.translator.trans('core.lib.series.glue_text')]), [])
.slice(0, -1);
return app.translator.trans('core.lib.series.three_text', {
first: items[0],
second,
third: items[items.length - 1],
});
}
return items;
}