Attach WooCommerce product docs to Contact Form 7 email - Create a brochure request form to send documents to a customer. https://www.damiencarbery.com/2022/12/attach-woocommerce-product-docs-to-contact-form-7-email/

attach-product-docs-to-cf7-email.php

<?php
/*
Plugin Name: Attach WooCommerce product docs to Contact Form 7 email
Plugin URI: https://www.damiencarbery.com/2022/12/attach-woocommerce-product-docs-to-contact-form-7-email/
Description: Create a brochure request form to send documents to a customer.
Author: Damien Carbery
Version: 0.1
WC tested up to: 7.2.0
*/


class AttachProductDocsToCF7Email {
	private $cf7_form_id;


	// Returns an instance of this class. 
	public static function get_instance() {
		if ( null == self::$instance ) {
			self::$instance = new self;
		} 
		return self::$instance;
	}


	// Initialize the plugin variables.
	public function __construct() {
		$this->cf7_form_id = 79;

		$this->init();
	}


	// Set up WordPress specfic actions.
	public function init() {
		// Verify that CMB2 plugin is active.
		add_action( 'admin_notices', array( $this, 'verify_cmb2_active' ) );

		// Add the metabox to add files to attach to the CF7 email.
		add_action( 'cmb2_admin_init', array( $this, 'product_files_metabox' ) );

		// Ensure the Description tab is present as it is needed by the_content filter.
		add_filter( 'woocommerce_product_tabs', array( $this, 'add_description_tab' ), 20 );
		
		// Add CF7 form to all product pages.
		add_filter( 'the_content', array( $this, 'cf7_form_to_all_products' ) );

		// Add files to email as an attachment
		add_filter( 'wpcf7_mail_components', array( $this, 'attach_product_files' ), 10, 3 );

		// Test the code - list the paths to the attachments on the product page.
		//add_action( 'woocommerce_after_single_product_summary', array( $this, 'testing_product_docs_code' ), 30 );
	}
	
	
	// Verify that CMB2 plugin is active.
	public function verify_cmb2_active() {
		if ( ! defined( 'CMB2_LOADED' ) ) {
			$plugin_data = get_plugin_data( __FILE__ );
			$plugin_name = $plugin_data['Name'];
	?>
	<div class="notice notice-warning is-dismissible"><p>Plugin <strong><?php echo $plugin_name; ?></strong> requires <a href="https://wordpress.org/plugins/cmb2/">CMB2 plugin</a>.</p></div>
	<?php
			//error_log( 'CMB2 is not active.' );
		}
	}


	// Add the metabox to add files to attach to the CF7 email.
	public function product_files_metabox() {

		$cmb = new_cmb2_box( array(
			'id'            => 'product_docs',
			'title'         => 'Product documentation',
			'object_types'  => array( 'product', ), // Limit to Product post type
			'context'       => 'side',
			'priority'      => 'high',
			'show_names'    => true, // Show field names on the left
		) );
		$cmb->add_field( array(
			'desc' => 'Upload the files that will be sent to a customer on request.',
			'id'   => 'product_file_list',
			'type' => 'file_list',
			//'preview_size' => array( 100, 100 ), // Default: array( 50, 50 )
			'query_args' => array( 'type' => array( 'application/pdf' ) ), // Set to only allow PDF attachments. This can be disabled or edited.
		) );
	}
	
	
	private function get_product_file_list( $post_id ) {
		return get_post_meta( $post_id, 'product_file_list', true );
	}


	// Add CF7 form to all product pages (though only if the product has attached files).
	public function cf7_form_to_all_products( $content ) {
		if ( class_exists( 'woocommerce' ) && is_product() && is_main_query() ) {  // Check suggested by: https://pippinsplugins.com/playing-nice-with-the-content-filter/
			$files = $this->get_product_file_list( get_the_ID() );

			// Only add the form if the product has files attached.
			if ( !empty( $files ) ) {
				return $content . '[contact-form-7 id="' . $this->cf7_form_id . '" title="Product Enquiry"]';
			}
		}
		
		return $content;
	}


	// Ensure the Description tab is present as it is needed by the_content filter.
	public function add_description_tab( $tabs ) {
		global $product, $post;

		$files = $this->get_product_file_list( get_the_ID() );

		// Do not add the tab if no files attached.
		if ( empty( $files ) ) {
			return $tabs;
		}

		// Description tab - add if there is no post content (i.e. if the Description is empty)
		// because woocommerce_default_product_tabs() in woocommerce/includes/wc-template-functions.php
		// excludes it if the post content is empty.
		if ( ! $post->post_content ) {
			$tabs['description'] = array(
				'title'    => __( 'Description', 'woocommerce' ),
				'priority' => 10,
				'callback' => 'woocommerce_product_description_tab',
			);
		}
		
		return $tabs;
	}
 
 
	public function attach_product_files( $components, $current_cf7_form, $form_object ) {
		// Verify that the we are processing the correct form.
		if ( $this->cf7_form_id != $current_cf7_form->id() ) {
			//error_log( 'Form ID mismatch: Is ' . $current_cf7_form->id() . '; expecting: ' . $this->cf7_form_id );
			return $components;
		}

		// Ensure that a match was found.
		if ( 1 !== preg_match( '/Product ID: (\d+)/m', $components[ 'body' ], $matches ) ) {
			//error_log( 'Product ID regex error: ' . var_export( $components[ 'body' ], true ) );
			return $components;
		}
		$product_id = $matches[1];

		// Check that the matched product ID is a number.
		if ( !is_numeric( $product_id ) || $product_id < 0 ) {
			//error_log( 'Product ID error: ' . var_export( $product_id, true ) );
			return $components;
		}

		//error_log( '$components: ' . var_export( $components, true ) );

		$files = $this->get_product_file_list( $product_id );

		// Return if no files attached.
		if ( empty( $files ) ) {
			return $components;
		}

		foreach ( (array) $files as $attachment_id => $attachment_url ) {
			$components[ 'attachments' ][] = get_attached_file( $attachment_id );
		}		
		//error_log( 'Attachments: ' . var_export( $components[ 'attachments' ], true ) );
		
		// Remove the Product ID line.
		$components[ 'body' ] = str_replace( 'Product ID: '.$product_id, '', $components[ 'body' ] );

		return $components;
	}


	// Test the code - list the paths to the attachments on the product page.
	public function testing_product_docs_code() {
		$files = $this->get_product_file_list( get_the_ID() );
		
		// Return if no files attached.
		if ( empty( $files ) ) {
			return;
		}

		echo '<pre>', var_export( $files, true ), '</pre>';

		$product_docs = array();
		foreach ( (array) $files as $attachment_id => $attachment_url ) {
			$product_docs[] = get_attached_file( $attachment_id );
		}
		echo '<ul><li>', implode( '</li><li>', $product_docs, ), '</li></ul>';	
	}
}

$AttachProductDocsToCF7Email = new AttachProductDocsToCF7Email();

cf7-email.txt

Subject:
Product documents: [product-title]

Body:
[your-name],

Please find attached the product information documents for [product-title].
Product ID: [product-id]

cf7-form.txt

[dynamichidden product-id "CF7_get_post_var key='ID'"]
[dynamichidden product-title "CF7_get_post_var key='title'"]