Split out frontmatter getters

src/frontmatter/date.js

@@ -0,0 +1,15 @@
+const luxon = require('luxon');
+
+const settings = require('../settings');
+
+module.exports = (post) => {
+	const dateTime = luxon.DateTime.fromRFC2822(post.data.pubDate[0], { zone: 'utc' });
+
+	if (settings.custom_date_formatting) {
+		return dateTime.toFormat(settings.custom_date_formatting);
+	} else if (settings.include_time_with_date) {
+		return dateTime.toISO();
+	} else {
+		return dateTime.toISODate();
+	}
+};