From cf322b6dca1820a6204b70abe383b9e99fd92969 Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@rc-d.net>
Date: Fri, 19 Oct 2018 11:04:30 -0400
Subject: [PATCH] Improvements to FieldtypeTextarea::importValue() to improve
 accuracy of linked asset URLs on pages imported from one site to another
 where the root URL has changed (subdirectory vs. non subdirectory), as well
 as better handling asset URLs where the link included a hostname

---
 .../Fieldtype/FieldtypeTextarea.module        | 62 ++++++++++++++++++-
 1 file changed, 59 insertions(+), 3 deletions(-)

diff --git a/wire/modules/Fieldtype/FieldtypeTextarea.module b/wire/modules/Fieldtype/FieldtypeTextarea.module
index aaed4e19..6e4de955 100644
--- a/wire/modules/Fieldtype/FieldtypeTextarea.module
+++ b/wire/modules/Fieldtype/FieldtypeTextarea.module
@@ -366,10 +366,66 @@ class FieldtypeTextarea extends FieldtypeText {
 	 */
 	public function ___importValue(Page $page, Field $field, $value, array $options = array()) {
 		$value = parent::___importValue($page, $field, $value, $options);
-		$originalID = (int) $page->get('_importOriginalID'); 
-		if($originalID && $page->id && strpos($value, "/$originalID/")) {
-			$value = str_replace("/assets/files/$originalID/", "/assets/files/$page->id/", $value); 
+		
+		// update changed IDs represented in asset paths
+		if(strpos($value, '/assets/files/') !== false) {
+			$originalID = (int) $page->get('_importOriginalID');
+			if($originalID && $page->id && strpos($value, "/$originalID/")) {
+				$value = str_replace("/assets/files/$originalID/", "/assets/files/$page->id/", $value);
+			}
 		}
+	
+		$contentType = $field->get('contentType');
+		if($contentType == self::contentTypeHTML || $contentType == self::contentTypeImageHTML) {
+			$value = $this->importValueHTML($value, $options);
+		}
+		
+		return $value;
+	}
+
+	/**
+	 * Helper to importValue function for HTML-specific content
+	 * 
+	 * This primarily updates references to export-site URLs to the current site
+	 * 
+	 * @param string $value
+	 * @param array $options
+	 * @return string
+	 * 
+	 */
+	protected function importValueHTML($value, array $options) {
+		// update changed root URLs in href or src attributes 
+		$config = $this->wire('config');
+		$url = $config->urls->root;
+		$host = $config->httpHost;
+		$_url = isset($options['originalRootUrl']) ? $options['originalRootUrl'] : $url; // original URL
+		$_host = isset($options['originalHost']) ? $options['originalHost'] : $host; // original host
+		
+		if($_url === $url && $_host === $host) return $value;
+
+		$findReplace = array();
+		$href = 'href="';
+		$src = 'src="';
+		
+		if($_host != $host) {
+			$schemes = array('http://', 'https://');
+			foreach($schemes as $scheme) {
+				$findReplace[$href . $scheme . $_host . '/'] = $href . '/';
+				$findReplace[$href . $scheme . $_host . '/'] = $href . '/';
+			}
+		}
+		
+		if($_url != $url) {
+			$findReplace[$href . $_url] = $href . $url;
+			$findReplace[$src . $_url] = $src . $url;
+		}
+		
+		foreach($findReplace as $find => $replace) {
+			if($find === $replace) continue;
+			if(strpos($value, $find) === false) continue;
+			$value = preg_replace('!(\s)' . $find . '!', '$1' . $replace, $value);
+		}
+		
 		return $value;
 	}