Switch from afterSaveElement event to afterPropagate to prevent l…

…oss of matrix blocks in certain cases

ref: craftcms/cms#7455 (comment)

Closes #64, closes #70, closes #71, closes #72, closes #73

src/PreparseField.php

@@ -16,6 +16,7 @@
 use craft\base\Plugin;
 use craft\elements\Asset;
 use craft\events\ElementEvent;
+use craft\events\ModelEvent;
 use craft\events\MoveElementEvent;
 use craft\helpers\FileHelper;
 use craft\services\Elements;
@@ -62,7 +63,7 @@ public function init()
 
  $this->preparsedElements = [
  'onBeforeSave' => [],
- 'onSave' => [],
+ 'onPropagate' => [],
  'onMoveElement' => [],
  ];
 
@@ -103,23 +104,24 @@ function (ElementEvent $event) {
  }
  );
 
- // After save element event handler
+ // After propagate element event handler
  Event::on(
- Elements::class,
- Elements::EVENT_AFTER_SAVE_ELEMENT,
- function (ElementEvent $event) {
- if ($event->element->getIsRevision()) {
+ Element::class,
+ Element::EVENT_AFTER_PROPAGATE,
+ function (ModelEvent $event) {
+ /** @var Element $element */
+ $element = $event->sender;
+
+ if ($element->getIsRevision()) {
  return;
  }
 
- /** @var Element $element */
- $element = $event->element;
  $key = $element->id . '__' . $element->siteId;
 
- if (!isset($this->preparsedElements['onSave'][$key])) {
- $this->preparsedElements['onSave'][$key] = true;
+ if (!isset($this->preparsedElements['onPropagate'][$key])) {
+ $this->preparsedElements['onPropagate'][$key] = true;
 
- $content = self::$plugin->preparseFieldService->getPreparseFieldsContent($element, 'onSave');
+ $content = self::$plugin->preparseFieldService->getPreparseFieldsContent($element, 'onPropagate');
 
  if (!empty($content)) {
  $this->resetUploads();
@@ -137,7 +139,7 @@ function (ElementEvent $event) {
  }
  }
 
- unset($this->preparsedElements['onSave'][$key]);
+ unset($this->preparsedElements['onPropagate'][$key]);
  }
  }
  );