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<?php

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declare( strict_types=1 );

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namespace Automattic\WooCommerce\Internal\EmailEditor;

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use Automattic\WooCommerce\EmailEditor\Email_Css_Inliner;

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use Automattic\WooCommerce\EmailEditor\Email_Editor_Container;

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use Automattic\WooCommerce\EmailEditor\Engine\Theme_Controller;

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/**

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* Class responsible for extracting the main content from a WC_Email object.

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class WooContentProcessor {

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/**

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* Email theme controller

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* We use it to get email CSS.

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* @var Theme_Controller

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private $theme_controller;

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/**

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* CSS inliner

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* @var Email_Css_Inliner

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private $css_inliner;

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/**

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* Constructor

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public function __construct() {

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$this->theme_controller = Email_Editor_Container::container()->get( Theme_Controller::class );

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$this->css_inliner = new Email_Css_Inliner();

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}

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/**

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* Get the WooCommerce content excluding headers and footers.

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* @param \WC_Email $wc_email WooCommerce email.

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* @return string

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public function get_woo_content( \WC_Email $wc_email ): string {

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$woo_content = $this->capture_woo_content( $wc_email );

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$woo_content_with_css = $this->inline_css( $woo_content );

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return $this->get_html_body_content( $woo_content_with_css );

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}

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/**

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* Filter CSS for the email.

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* The CSS was from email editor was already inlined.

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* The method hookes to woocommerce_email_styles and removes CSS rules that we don't want to apply to the email.

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* @param string $css CSS.

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* @return string

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public function prepare_css( string $css ): string {

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remove_filter( 'woocommerce_email_styles', array( $this, 'prepare_css' ) );

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// Remove color and font-family declarations from WooCommerce CSS.

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$css = preg_replace( '/color\s*:\s*[^;]+;/', '', $css );

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$css = preg_replace( '/font-family\s*:\s*[^;]+;/', '', $css );

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return $css;

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}

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/**

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* Get the content of the body tag from the HTML.

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* @param string $html HTML.

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* @return string

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private function get_html_body_content( string $html ): string {

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// Extract content between <body> and </body> tags using regex.

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if ( preg_match( '/<body[^>]*>(.*?)<\/body>/is', $html, $matches ) ) {

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return $matches[1];

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}

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return $html;

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}

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/**

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* Inline the CSS from the email theme and user email settings.

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* @param string $woo_content WooCommerce content.

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* @return string

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private function inline_css( string $woo_content ): string {

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if ( empty( $woo_content ) ) {

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return '';

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}

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$css = $this->theme_controller->get_stylesheet_for_rendering();

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return $this->css_inliner->from_html( $woo_content )->inline_css( $css )->render();

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}

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/**

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* Capture the WooCommerce content excluding headers and footers.

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* @param \WC_Email $wc_email WooCommerce email.

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* @return string

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private function capture_woo_content( \WC_Email $wc_email ): string {

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return $wc_email->get_block_editor_email_template_content();

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}

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}

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