From 0fd6a2aaed1c8f9623a4e2dcf11d3b1280903aff Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@processwire.com>
Date: Wed, 22 May 2019 14:03:34 -0400
Subject: [PATCH] Update RepeaterPage class with methods to identify root
 forField and forPage in nested repeaters

---
 .../FieldtypeRepeater/RepeaterPage.php        | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/wire/modules/Fieldtype/FieldtypeRepeater/RepeaterPage.php b/wire/modules/Fieldtype/FieldtypeRepeater/RepeaterPage.php
index 45aca55f..d450505a 100644
--- a/wire/modules/Fieldtype/FieldtypeRepeater/RepeaterPage.php
+++ b/wire/modules/Fieldtype/FieldtypeRepeater/RepeaterPage.php
@@ -115,6 +115,52 @@ class RepeaterPage extends Page {
 		return $this->forField;
 	}
 
+	/**
+	 * For nested repeaters, returns the root level forPage and forField in an array
+	 *
+	 * @param string $get Specify 'page' or 'field' or omit for array of both
+	 * @return array|Page|Field
+	 * @since 3.0.132
+	 *
+	 */
+	protected function getForRoot($get = '') {
+		$forPage = $this->getForPage();
+		$forField = $this->getForField();
+		$n = 0;
+		while($forPage instanceof RepeaterPage && ++$n < 20) {
+			$forField = $forPage->getForField();
+			$forPage = $forPage->getForPage();
+		}
+		if($forPage instanceof RepeaterPage) {
+			$forPage = new NullPage();
+		}
+		if($get === 'page') return $forPage;
+		if($get === 'field') return $forField;
+		return array('page' => $forPage, 'field' => $forField);
+	}
+
+	/**
+	 * For nested repeaters, return the root-level field that this repeater item belongs to
+	 *
+	 * @return Field
+	 * @since 3.0.132
+	 *
+	 */
+	public function getForFieldRoot() {
+		return $this->getForRoot('field');
+	}
+
+	/**
+	 * For nested repeaters, return the root-level non-repeater page that this repeater item belongs to
+	 *
+	 * @return Page
+	 * @since 3.0.132
+	 *
+	 */
+	public function getForPageRoot() {
+		return $this->getForRoot('page');
+	}
+
 	/**
 	 * Get property
 	 * 
@@ -181,5 +227,28 @@ class RepeaterPage extends Page {
 	public function isReady() {
 		return $this->isUnpublished() && $this->isHidden();
 	}
+
+	/**
+	 * Track a change to a property in this object
+	 *
+	 * The change will only be recorded if change tracking is enabled for this object instance.
+	 *
+	 * #pw-group-changes
+	 *
+	 * @param string $what Name of property that changed
+	 * @param mixed $old Previous value before change
+	 * @param mixed $new New value
+	 * @return $this
+	 *
+	public function trackChange($what, $old = null, $new = null) {
+		parent::trackChange($what, $old, $new);
+		if($this->trackChanges()) {
+			$forPage = $this->getForPage();
+			$forField = $this->getForField();
+			if($forPage->id && $forField) $forPage->trackChange($forField->name);
+		}
+		return $this;
+	}
+	 */
 }