From 55e8fc94ca4f628d58dd0bbef396e97ea4b9137e Mon Sep 17 00:00:00 2001
From: Stefanos Valoumas <stefanosv@transifex.com>
Date: Mon, 17 Jun 2024 16:40:48 +0300
Subject: [PATCH] Toggle canonical URLs

---
 .../transifex-live-integration-admin-template.php  |  7 ++++++-
 .../admin/transifex-live-integration-admin.php     |  9 +++++++++
 .../lib/transifex-live-integration-hreflang.php    | 14 ++++++++++++++
 includes/transifex-live-integration-defaults.php   |  1 +
 4 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/includes/admin/transifex-live-integration-admin-template.php b/includes/admin/transifex-live-integration-admin-template.php
index f49c322..ce91e7c 100644
--- a/includes/admin/transifex-live-integration-admin-template.php
+++ b/includes/admin/transifex-live-integration-admin-template.php
@@ -42,10 +42,15 @@
 			</td>
 		</tr>
 		<tr>
-			<td style="padding-right:0px">
+			<td style="padding-right:0px; padding-bottom: 1px;">
 				<input name="transifex_live_settings[translate_urls]" type="checkbox" id="transifex_live_settings_translate_urls" value="1" <?php echo $checked_translate_urls ?>><?php _e( 'Make images and links translatable' ); ?>&nbsp;<a target="_blank" href="<?php echo $settings['urls']['translate_urls']; ?>"><b><?php _e( 'Learn more' ) ?></b></a>.
 			</td>
 		</tr>
+		<tr>
+			<td style="padding-right:0px">
+				<input name="transifex_live_settings[canonical_urls]" type="checkbox" id="transifex_live_settings_canonical_urls" value="1" <?php echo $checked_canonical_urls ?>><?php _e( 'Disable rendering canonical URLs' ); ?>.
+			</td>
+		</tr>
 		<tr>
 			<td>
 				<label for="transifex_live_settings_url_options">
diff --git a/includes/admin/transifex-live-integration-admin.php b/includes/admin/transifex-live-integration-admin.php
index 0f161c4..e8a4726 100644
--- a/includes/admin/transifex-live-integration-admin.php
+++ b/includes/admin/transifex-live-integration-admin.php
@@ -91,6 +91,10 @@ static function options_page() {
 		checked( $settings['translate_urls'], 1 );
 		$checked_translate_urls = ob_get_clean();
 
+		ob_start();
+		checked( $settings['canonical_urls'], 1 );
+		$checked_canonical_urls = ob_get_clean();
+
 		ob_start();
 		checked( $settings['rewrite_option_all'], 1 );
 		$checked_rewrite_option_all = ob_get_clean();
@@ -212,9 +216,13 @@ static public function update_settings( $settings ) {
 		$transifex_languages = json_decode( stripslashes( $settings['transifex_live_settings']['transifex_languages'] ), true );
 
 		$is_subdirectory_install = false;
+		$disable_canonical_urls = false;
 		if ( isset($settings['transifex_live_settings']['is_subdirectory_install'])) {
 			$is_subdirectory_install = $settings['transifex_live_settings']['is_subdirectory_install'];
 		}
+		if ( isset($settings['transifex_live_settings']['disable_canonical_urls'])) {
+			$disable_canonical_urls = $settings['transifex_live_settings']['disable_canonical_urls'];
+		}
 		$site_url = (new Transifex_Live_Integration_WP_Services($settings['transifex_live_settings']))->get_site_url();
 		$tokenized_url = Transifex_Live_Integration_Admin_Util::generate_tokenized_url( $site_url, $settings['transifex_live_settings']['url_options'] );
 		$settings['transifex_live_settings']['tokenized_url'] = $tokenized_url;
@@ -255,6 +263,7 @@ static public function update_settings( $settings ) {
 		$settings['transifex_live_settings']['rewrite_pattern'] = $rewrite_pattern;
 		$settings['transifex_live_settings']['languages_regex'] = $languages_regex;
 		$settings['transifex_live_settings']['languages'] = $languages;
+		$settings['transifex_live_settings']['disable_canonical_urls'] = $disable_canonical_urls;
 		if ( isset( $settings['transifex_live_settings'] ) ) {
 			update_option( 'transifex_live_settings', $settings['transifex_live_settings'] );
 		}
diff --git a/includes/lib/transifex-live-integration-hreflang.php b/includes/lib/transifex-live-integration-hreflang.php
index f10ca27..dba0520 100644
--- a/includes/lib/transifex-live-integration-hreflang.php
+++ b/includes/lib/transifex-live-integration-hreflang.php
@@ -126,6 +126,7 @@ public function render_hreflang() {
 			return false;
 		}
 		global $wp;
+		$disable_canonical_urls = $this->settings['canonical_urls'];
 		$lang = get_query_var( 'lang' );
 		$url_path = add_query_arg( array(), $wp->request );
 		$source_url_path = (substr( $url_path, 0, strlen( $lang ) ) === $lang) ? substr( $url_path, strlen( $lang ), strlen( $url_path ) ) : $url_path;
@@ -164,6 +165,19 @@ public function render_hreflang() {
       $hreflang_out .= <<<XDEFAULT
 <link rel="alternate" href="$source_url" hreflang="x-default"/>\n
 XDEFAULT;
+    if (!$disable_canonical_urls) {
+      $canonical_url = home_url('/');
+      foreach ($hreflangs as $hreflang) {
+          if (!empty($url_path) && strpos($hreflang['href'], $url_path) !== false) {
+            $canonical_url = $hreflang['href'];
+            break;
+          } else {}
+      }
+
+      $hreflang_out .= <<<CANONICAL
+  <link rel="canonical" href="$canonical_url"/>\n
+  CANONICAL;
+    }
 		echo $hreflang_out;
 		return true;
 	}
diff --git a/includes/transifex-live-integration-defaults.php b/includes/transifex-live-integration-defaults.php
index e3a3aab..b9ca00f 100644
--- a/includes/transifex-live-integration-defaults.php
+++ b/includes/transifex-live-integration-defaults.php
@@ -106,6 +106,7 @@ static function settings() {
 			// Wordpress is installed in a subdirectory like www.mydomain.com/cms but the site is accessible from www.mydomain.com
 			'is_subdirectory_install' => 0,
 			'translate_urls' => false,
+      'canonical_urls' => false,
 			'previous_api_key' => null,
 			'raw_transifex_languages' => null,
 			'transifex_languages' => null,