Show relative timestamp using mixin

Signed-off-by: Julius Härtl <jus@bitgrid.net>

src/mixins/relativeDate.js

@@ -0,0 +1,37 @@
+/*
+ * @copyright Copyright (c) 2020 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+import moment from '@nextcloud/moment'
+
+export default {
+	computed: {
+		relativeDate() {
+			return (timestamp) => {
+				const diff = moment(this.$root.time).diff(moment(timestamp))
+				if (diff >= 0 && diff < 45000) {
+					return t('core', 'seconds ago')
+				}
+				return moment(timestamp).fromNow()
+			}
+		},
+	},
+}