From f49b5ab4b812e2ea99c455bcf35adc0b5dc3358e Mon Sep 17 00:00:00 2001
From: Ben Thomson <ben@abweb.com.au>
Date: Mon, 8 Apr 2019 23:40:41 +0800
Subject: [PATCH] Add callback for handling sorted repeater items

---
 modules/backend/formwidgets/Repeater.php             |  5 +++++
 .../formwidgets/repeater/assets/js/repeater.js       | 12 ++++++++++--
 .../formwidgets/repeater/partials/_repeater.htm      |  1 +
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/modules/backend/formwidgets/Repeater.php b/modules/backend/formwidgets/Repeater.php
index f2adcda28..ffa9a3bed 100644
--- a/modules/backend/formwidgets/Repeater.php
+++ b/modules/backend/formwidgets/Repeater.php
@@ -322,6 +322,11 @@ class Repeater extends FormWidgetBase
         return $widget->onRefresh();
     }
 
+    public function onReorder()
+    {
+        // Handle reordering of repeater items
+    }
+
     //
     // Group mode
     //
diff --git a/modules/backend/formwidgets/repeater/assets/js/repeater.js b/modules/backend/formwidgets/repeater/assets/js/repeater.js
index e3d5cfc0e..c436b220f 100644
--- a/modules/backend/formwidgets/repeater/assets/js/repeater.js
+++ b/modules/backend/formwidgets/repeater/assets/js/repeater.js
@@ -35,6 +35,7 @@
 
     Repeater.DEFAULTS = {
         sortableHandle: '.repeater-item-handle',
+        sortableHandler: null,
         sortableContainer: 'ul.field-repeater-items',
         titleFrom: null,
         minItems: null,
@@ -232,13 +233,20 @@
     Repeater.prototype.onSortStart = function($item, container, callback, event) {
         this.sortingStartIndex = $item.index()
 
-        callback($item, container, callback, event);
+        callback($item, container, callback, event)
     }
 
     Repeater.prototype.onSortStop = function($item, container, callback, event) {
         var endIndex = $item.index()
 
-        callback($item, container, callback, event);
+        this.$el.request(this.options.sortableHandler, {
+            data: {
+                _repeater_index: this.sortingStartIndex,
+                _repeater_new_index: endIndex
+            }
+        })
+
+        callback($item, container, callback, event)
     }
 
     // FIELD REPEATER PLUGIN DEFINITION
diff --git a/modules/backend/formwidgets/repeater/partials/_repeater.htm b/modules/backend/formwidgets/repeater/partials/_repeater.htm
index 995c42cd8..2647b6ae5 100644
--- a/modules/backend/formwidgets/repeater/partials/_repeater.htm
+++ b/modules/backend/formwidgets/repeater/partials/_repeater.htm
@@ -3,6 +3,7 @@
      <?= $titleFrom ? 'data-title-from="'.$titleFrom.'"' : '' ?>
      <?= $minItems ? 'data-min-items="'.$minItems.'"' : '' ?>
      <?= $maxItems ? 'data-max-items="'.$maxItems.'"' : '' ?>
+     data-sortable-handler="<?= $this->getEventHandler('onReorder') ?>"
      data-sortable-container="#<?= $this->getId('items') ?>"
      data-sortable-handle=".<?= $this->getId('items') ?>-handle">