StEP 01354, closes #1354

Closes #1354

Merge request studip/studip!2116

1 files changed, 61 insertions, 0 deletions

diff --git a/resources/assets/javascripts/lib/datetime.js b/resources/assets/javascripts/lib/datetime.js
new file mode 100644
index 0000000..d58fac8
--- /dev/null
+++ b/resources/assets/javascripts/lib/datetime.js
@@ -0,0 +1,61 @@
+import { $gettext, $gettextInterpolate } from "./gettext.ts";
+
+
+const DateTime = {
+    /**
+     * A helper method for padding strings with leading zeros.
+     * @param what The date to pad.
+     * @param length The length of the string to output.
+     * @returns {string} A padded version of $what.
+     */
+    pad(what, length = 2) {
+        return `00000000${what}`.substr(-length);
+    },
+
+    /**
+     * Returns an ISO representation of the specified Date object.
+     * in the format YYYY-MM-DD.
+     *
+     * @param date The Date object to format as ISO date.
+     * @returns {string} The ISO date string of the Date object.
+     */
+    getISODate(date) {
+        return date.getFullYear() + '-' + this.pad(date.getMonth() + 1) + '-' + date.getDate();
+    },
+
+    /**
+     * Returns a formatted version of the specified Date object
+     * in the Stud.IP date formatting.
+     *
+     * @param date The Date object to be formatted.
+     * @param relative_value Whether to return a relative time value (true)
+     *     or an absolute one (false). Defaults to false.
+     * @param date_only Whether to return the date only (true) or date and time (false).
+     *     Defaults to false. Only regarded when $relative_value is false.
+     * @returns {*|string} The date, formatted according to the Stud.IP format for dates.
+     */
+    getStudipDate(date, relative_value = false, date_only = false) {
+        if (relative_value) {
+            let now = Date.now();
+            if (now - date < 1 * 60 * 1000) {
+                return $gettext('Jetzt');
+            }
+            if (now - date < 2 * 60 * 60 * 1000) {
+                return $gettextInterpolate(
+                    $gettext('Vor %{ minutes } Minuten'),
+                    {minutes: Math.floor((now - date) / (1000 * 60))}
+                );
+            }
+            return this.pad(date.getHours()) + ':' + this.pad(date.getMinutes());
+        }
+
+        if (date_only) {
+            return this.pad(date.getDate()) + '.' + this.pad(date.getMonth() + 1) + '.' + date.getFullYear();
+        }
+
+        return this.pad(date.getDate()) + '.' + this.pad(date.getMonth() + 1) + '.' + date.getFullYear() + ' ' + this.pad(date.getHours()) + ':' + this.pad(date.getMinutes());
+    }
+};
+
+
+export default DateTime;