new plugin 'date'

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - New filter `njk` registered by the `nunjucks` plugin
 - Moved `url` filter to a plugin that also created an additional filter `htmlUrl` to search and fix urls in html code
+- New plugin `date` to manage date and time values using the library [date-fns](https://date-fns.org)
 
 ### Fixed
 - Url filter with `null` values

deps/date.js

@@ -1,4 +1 @@
 export { default as format } from "https://deno.land/x/date_fns@v2.15.0/format/index.js";
-import gl from "https://deno.land/x/date_fns/locale/gl/index.js";
-
-export const locales = { gl };

plugins/date.js

@@ -0,0 +1,36 @@
+import { format } from "../deps/date.js";
+
+const formats = new Map([
+  ["ATOM", "yyyy-MM-dd'T'HH:mm:ssxxx"],
+  ["DATE", "yyyy-MM-dd"],
+  ["DATETIME", "yyyy-MM-dd HH:mm:ss"],
+  ["TIME", "HH:mm:ss"],
+  ["HUMAN_DATE", "PPP"],
+  ["HUMAN_DATETIME", "PPPppp"],
+]);
+
+const defaults = {
+  locales: {},
+  formats: {},
+};
+
+export default function (options = {}) {
+  const userOptions = { ...defaults, ...options };
+  const defaultLocale = Object.keys(userOptions.locales).shift();
+
+  return (site) => {
+    site.filter("date", filter);
+
+    function filter(date, pattern = "DATE", lang = defaultLocale) {
+      if (!date) {
+        return;
+      }
+
+      const patt = userOptions.formats[pattern] || formats.get(pattern) ||
+        pattern;
+      const locale = userOptions.locales[lang];
+
+      return format(date, patt, { locale });
+    }
+  };
+}