Update to Kirby 5

kirby/config/sections/mixins/batch.php

@@ -0,0 +1,45 @@
+<?php
+
+use Kirby\Exception\Exception;
+use Kirby\Exception\PermissionException;
+use Kirby\Toolkit\I18n;
+
+return [
+	'props' => [
+		/**
+		 * Activates the batch delete option for the section
+		 */
+		'batch' => function (bool $batch = false) {
+			return $batch;
+		},
+	],
+	'methods' => [
+		'deleteSelected' => function (array $ids): bool {
+			if ($ids === []) {
+				return true;
+			}
+
+			// check if batch deletion is allowed
+			if ($this->batch() === false) {
+				throw new PermissionException(
+					message: 'The section does not support batch actions'
+				);
+			}
+
+			$min = $this->min();
+
+			// check if the section has enough items after the deletion
+			if ($this->total() - count($ids) < $min) {
+				throw new Exception(
+					message: I18n::template('error.section.' . $this->type() . '.min.' . I18n::form($min), [
+						'min'     => $min,
+						'section' => $this->headline()
+					])
+				);
+			}
+
+			$this->models()->delete($ids);
+			return true;
+		}
+	]
+];