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class-emails.php	18.7 KB
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Edit: class-emails.php

<?php

use WPForms\Tasks\Actions\EntryEmailsTask;

/**
 * Emails.
 *
 * This class handles all (notification) emails sent by WPForms.
 *
 * Heavily influenced by the great AffiliateWP plugin by Pippin Williamson.
 * https://github.com/AffiliateWP/AffiliateWP/blob/master/includes/emails/class-affwp-emails.php
 *
 * @since 1.1.3
 */
class WPForms_WP_Emails {

/**
	 * Store the from address.
	 *
	 * @since 1.1.3
	 *
	 * @var string
	 */
	private $from_address;

/**
	 * Store the from name.
	 *
	 * @since 1.1.3
	 *
	 * @var string
	 */
	private $from_name;

/**
	 * Store the reply-to address.
	 *
	 * @since 1.1.3
	 *
	 * @var string
	 */
	private $reply_to = false;

/**
	 * Store the carbon copy addresses.
	 *
	 * @since 1.3.1
	 *
	 * @var string
	 */
	private $cc = false;

/**
	 * Store the email content type.
	 *
	 * @since 1.1.3
	 *
	 * @var string
	 */
	private $content_type;

/**
	 * Store the email headers.
	 *
	 * @since 1.1.3
	 *
	 * @var string
	 */
	private $headers;

/**
	 * Whether to send email in HTML.
	 *
	 * @since 1.1.3
	 *
	 * @var bool
	 */
	private $html = true;

/**
	 * The email template to use.
	 *
	 * @since 1.1.3
	 *
	 * @var string
	 */
	private $template;

/**
	 * Form data and settings.
	 *
	 * @since 1.1.3
	 *
	 * @var array
	 */
	public $form_data = array();

/**
	 * Fields, formatted, and sanitized.
	 *
	 * @since 1.1.3
	 *
	 * @var array
	 */
	public $fields = array();

/**
	 * Entry ID.
	 *
	 * @since 1.2.3
	 *
	 * @var int
	 */
	public $entry_id = '';

/**
	 * Notification ID that is currently being processed.
	 *
	 * @since 1.5.7
	 *
	 * @var int
	 */
	public $notification_id = '';

/**
	 * Get things going.
	 *
	 * @since 1.1.3
	 */
	public function __construct() {

if ( 'none' === $this->get_template() ) {
			$this->html = false;
		}

add_action( 'wpforms_email_send_before', array( $this, 'send_before' ) );
		add_action( 'wpforms_email_send_after', array( $this, 'send_after' ) );
	}

/**
	 * Set a property.
	 *
	 * @since 1.1.3
	 *
	 * @param string $key   Object property key.
	 * @param mixed  $value Object property value.
	 */
	public function __set( $key, $value ) {

$this->$key = $value;
	}

/**
	 * Get the email from name.
	 *
	 * @since 1.1.3
	 *
	 * @return string The email from name
	 */
	public function get_from_name() {

if ( ! empty( $this->from_name ) ) {
			$this->from_name = $this->process_tag( $this->from_name );
		} else {
			$this->from_name = get_bloginfo( 'name' );
		}

return apply_filters( 'wpforms_email_from_name', wpforms_decode_string( $this->from_name ), $this );
	}

/**
	 * Get the email from address.
	 *
	 * @since 1.1.3
	 *
	 * @return string The email from address.
	 */
	public function get_from_address() {

if ( ! empty( $this->from_address ) ) {
			$this->from_address = $this->process_tag( $this->from_address );
		} else {
			$this->from_address = get_option( 'admin_email' );
		}

return apply_filters( 'wpforms_email_from_address', wpforms_decode_string( $this->from_address ), $this );
	}

/**
	 * Get the email reply-to.
	 *
	 * @since 1.1.3
	 *
	 * @return string The email reply-to address.
	 */
	public function get_reply_to() {

if ( ! empty( $this->reply_to ) ) {

$this->reply_to = $this->process_tag( $this->reply_to );

if ( ! is_email( $this->reply_to ) ) {
				$this->reply_to = false;
			}
		}

return apply_filters( 'wpforms_email_reply_to', wpforms_decode_string( $this->reply_to ), $this );
	}

/**
	 * Get the email carbon copy addresses.
	 *
	 * @since 1.3.1
	 *
	 * @return string The email reply-to address.
	 */
	public function get_cc() {

if ( ! empty( $this->cc ) ) {

$this->cc = $this->process_tag( $this->cc );

$addresses = array_map( 'trim', explode( ',', $this->cc ) );

foreach ( $addresses as $key => $address ) {
				if ( ! is_email( $address ) ) {
					unset( $addresses[ $key ] );
				}
			}

$this->cc = implode( ',', $addresses );
		}

return apply_filters( 'wpforms_email_cc', wpforms_decode_string( $this->cc ), $this );
	}

/**
	 * Get the email content type.
	 *
	 * @since 1.1.3
	 *
	 * @return string The email content type.
	 */
	public function get_content_type() {

if ( ! $this->content_type && $this->html ) {
			$this->content_type = apply_filters( 'wpforms_email_default_content_type', 'text/html', $this );
		} elseif ( ! $this->html ) {
			$this->content_type = 'text/plain';
		}

return apply_filters( 'wpforms_email_content_type', $this->content_type, $this );
	}

/**
	 * Get the email headers.
	 *
	 * @since 1.1.3
	 *
	 * @return string The email headers.
	 */
	public function get_headers() {

if ( ! $this->headers ) {
			$this->headers = "From: {$this->get_from_name()} <{$this->get_from_address()}>\r\n";
			if ( $this->get_reply_to() ) {
				$this->headers .= "Reply-To: {$this->get_reply_to()}\r\n";
			}
			if ( $this->get_cc() ) {
				$this->headers .= "Cc: {$this->get_cc()}\r\n";
			}
			$this->headers .= "Content-Type: {$this->get_content_type()}; charset=utf-8\r\n";
		}

return apply_filters( 'wpforms_email_headers', $this->headers, $this );
	}

/**
	 * Build the email.
	 *
	 * @since 1.1.3
	 *
	 * @param string $message The email message.
	 *
	 * @return string
	 */
	public function build_email( $message ) {

// Plain text email shortcut.
		if ( false === $this->html ) {
			$message = $this->process_tag( $message );
			$message = str_replace( '{all_fields}', $this->wpforms_html_field_value( false ), $message );

return apply_filters( 'wpforms_email_message', wpforms_decode_string( $message ), $this );
		}

/*
		 * Generate an HTML email.
		 */

ob_start();

$this->get_template_part( 'header', $this->get_template(), true );

// Hooks into the email header.
		do_action( 'wpforms_email_header', $this );

$this->get_template_part( 'body', $this->get_template(), true );

// Hooks into the email body.
		do_action( 'wpforms_email_body', $this );

$this->get_template_part( 'footer', $this->get_template(), true );

// Hooks into the email footer.
		do_action( 'wpforms_email_footer', $this );

$message = $this->process_tag( $message );
		$message = nl2br( $message );

$body = ob_get_clean();

$message = str_replace( '{email}', $message, $body );
		$message = str_replace( '{all_fields}', $this->wpforms_html_field_value( true ), $message );
		$message = make_clickable( $message );

return apply_filters( 'wpforms_email_message', $message, $this );
	}

/**
	 * Send the email.
	 *
	 * @since 1.1.3
	 *
	 * @param string $to          The To address.
	 * @param string $subject     The subject line of the email.
	 * @param string $message     The body of the email.
	 * @param array  $attachments Attachments to the email.
	 *
	 * @return bool
	 */
	public function send( $to, $subject, $message, $attachments = array() ) {

if ( ! did_action( 'init' ) && ! did_action( 'admin_init' ) ) {
			_doing_it_wrong( __FUNCTION__, esc_html__( 'You cannot send emails with WPForms_WP_Emails() until init/admin_init has been reached.', 'wpforms-lite' ), null );

return false;
		}

// Don't send anything if emails have been disabled.
		if ( $this->is_email_disabled() ) {
			return false;
		}

// Don't send if email address is invalid.
		if ( ! is_email( $to ) ) {
			return false;
		}

// Hooks before email is sent.
		do_action( 'wpforms_email_send_before', $this );

// Deprecated filter for $attachments.
		$attachments = apply_filters_deprecated(
			'wpforms_email_attachments',
			array( $attachments, $this ),
			'1.5.7 of the WPForms plugin',
			'wpforms_emails_send_email_data'
		);

/*
		 * Allow to filter data on per-email basis,
		 * useful for localizations based on recipient email address, form settings,
		 * or for specific notifications - whatever available in WPForms_WP_Emails class.
		 */
		$data = apply_filters(
			'wpforms_emails_send_email_data',
			array(
				'to'          => $to,
				'subject'     => $subject,
				'message'     => $message,
				'headers'     => $this->get_headers(),
				'attachments' => $attachments,
			),
			$this
		);

$send_same_process = apply_filters(
			'wpforms_tasks_entry_emails_trigger_send_same_process',
			false,
			$this->fields,
			! empty( wpforms()->entry ) ? wpforms()->entry->get( $this->entry_id ) : [],
			$this->form_data,
			$this->entry_id,
			'entry'
		);

if (
			$send_same_process ||
			! empty( $this->form_data['settings']['disable_entries'] )
		) {
			// Let's do this NOW.
			$result = wp_mail(
				$data['to'],
				$this->get_prepared_subject( $data['subject'] ),
				$this->build_email( $data['message'] ),
				$data['headers'],
				$data['attachments']
			);
		} else {
			// Schedule the email.
			$result = (bool) ( new EntryEmailsTask() )
				->params(
					$data['to'],
					$this->get_prepared_subject( $data['subject'] ),
					$this->build_email( $data['message'] ),
					$data['headers'],
					$data['attachments']
				)
				->register();
		}

// Hooks after the email is sent.
		do_action( 'wpforms_email_send_after', $this );

return $result;
	}

/**
	 * Add filters/actions before the email is sent.
	 *
	 * @since 1.1.3
	 */
	public function send_before() {

add_filter( 'wp_mail_from', array( $this, 'get_from_address' ) );
		add_filter( 'wp_mail_from_name', array( $this, 'get_from_name' ) );
		add_filter( 'wp_mail_content_type', array( $this, 'get_content_type' ) );
	}

/**
	 * Remove filters/actions after the email is sent.
	 *
	 * @since 1.1.3
	 */
	public function send_after() {

remove_filter( 'wp_mail_from', array( $this, 'get_from_address' ) );
		remove_filter( 'wp_mail_from_name', array( $this, 'get_from_name' ) );
		remove_filter( 'wp_mail_content_type', array( $this, 'get_content_type' ) );
	}

/**
	 * Convert text formatted HTML. This is primarily for turning line breaks
	 * into <p> and <br/> tags.
	 *
	 * @since 1.1.3
	 *
	 * @param string $message Text to convert.
	 *
	 * @return string
	 */
	public function text_to_html( $message ) {

if ( 'text/html' === $this->content_type || true === $this->html ) {
			$message = wpautop( $message );
		}

return $message;
	}

/**
	 * Process a smart tag.
	 * Decodes entities and sanitized (keeping line breaks) by default.
	 *
	 * @uses wpforms_decode_string()
	 *
	 * @since 1.1.3
	 * @since 1.6.0 Deprecated 2 params: $sanitize, $linebreaks.
	 *
	 * @param string $string String that may contain tags.
	 *
	 * @return string
	 */
	public function process_tag( $string = '' ) {

return wpforms_process_smart_tags( $string, $this->form_data, $this->fields, $this->entry_id );
	}

/**
	 * Process the all fields smart tag if present.
	 *
	 * @since 1.1.3
	 *
	 * @param bool $is_html_email Toggle to use HTML or plaintext.
	 *
	 * @return string
	 */
	public function wpforms_html_field_value( $is_html_email = true ) { // phpcs:ignore

if ( empty( $this->fields ) ) {
			return '';
		}

if ( empty( $this->form_data['fields'] ) ) {
			$is_html_email = false;
		}

$message = '';

if ( $is_html_email ) {
			/*
			 * HTML emails.
			 */
			ob_start();

// Hooks into the email field.
			do_action( 'wpforms_email_field', $this );

$this->get_template_part( 'field', $this->get_template(), true );

$field_template = ob_get_clean();

// Check to see if user has added support for field type.
			$other_fields = apply_filters( 'wpforms_email_display_other_fields', array(), $this );

$x = 1;

foreach ( $this->form_data['fields'] as $field_id => $field ) {

$field_name = '';
				$field_val  = '';

// If the field exists in the form_data but not in the final
				// field data, then it's a non-input based field, "other fields".
				if ( empty( $this->fields[ $field_id ] ) ) {

if ( empty( $other_fields ) || ! in_array( $field['type'], $other_fields, true ) ) {
						continue;
					}

if ( $field['type'] === 'divider' ) {
						$field_name = ! empty( $field['label'] ) ? str_repeat( '&mdash;', 3 ) . ' ' . $field['label'] . ' ' . str_repeat( '&mdash;', 3 ) : null;
						$field_val  = ! empty( $field['description'] ) ? $field['description'] : '';
					} elseif ( $field['type'] === 'pagebreak' ) {
						if ( ! empty( $field['position'] ) && $field['position'] === 'bottom' ) {
							continue;
						}
						$title      = ! empty( $field['title'] ) ? $field['title'] : esc_html__( 'Page Break', 'wpforms-lite' );
						$field_name = str_repeat( '&mdash;', 6 ) . ' ' . $title . ' ' . str_repeat( '&mdash;', 6 );
					} elseif ( $field['type'] === 'html' ) {

// If CL is enabled and the field is conditionally hidden, hide it from message.
						if ( ! empty( $this->form_data['fields'][ $field['id'] ]['conditionals'] ) && ! wpforms_conditional_logic_fields()->field_is_visible( $this->form_data, $field['id'] ) ) {
							continue;
						}

$field_name = ! empty( $field['name'] ) ? $field['name'] : esc_html__( 'HTML / Code Block', 'wpforms-lite' );
						$field_val  = $field['code'];
					}
				} else {

if (
						! apply_filters( 'wpforms_email_display_empty_fields', false ) &&
						( ! isset( $this->fields[ $field_id ]['value'] ) || (string) $this->fields[ $field_id ]['value'] === '' )
					) {
						continue;
					}

$field_name = $this->fields[ $field_id ]['name'];
					$field_val  = empty( $this->fields[ $field_id ]['value'] ) && ! is_numeric( $this->fields[ $field_id ]['value'] ) ? '<em>' . esc_html__( '(empty)', 'wpforms-lite' ) . '</em>' : $this->fields[ $field_id ]['value'];
				}

if ( empty( $field_name ) && null !== $field_name ) {
					$field_name = sprintf( /* translators: %d - field ID. */
						esc_html__( 'Field ID #%d', 'wpforms-lite' ),
						absint( $field['id'] )
					);
				}

$field_item = $field_template;

if ( 1 === $x ) {
					$field_item = str_replace( 'border-top:1px solid #dddddd;', '', $field_item );
				}
				$field_item = str_replace( '{field_name}', $field_name, $field_item );
				$field_item = str_replace(
					'{field_value}',
					apply_filters(
						'wpforms_html_field_value',
						$field_val,
						isset( $this->fields[ $field_id ] ) ? $this->fields[ $field_id ] : $field,
						$this->form_data,
						'email-html'
					),
					$field_item
				);

$message .= wpautop( $field_item );

$x ++;
			}
		} else {
			/*
			 * Plain Text emails.
			 */
			foreach ( $this->fields as $field ) {

if (
					! apply_filters( 'wpforms_email_display_empty_fields', false ) &&
					( ! isset( $field['value'] ) || (string) $field['value'] === '' )
				) {
					continue;
				}

$field_val  = empty( $field['value'] ) && ! is_numeric( $field['value'] ) ? esc_html__( '(empty)', 'wpforms-lite' ) : $field['value'];
				$field_name = $field['name'];

if ( empty( $field_name ) ) {
					$field_name = sprintf( /* translators: %d - field ID. */
						esc_html__( 'Field ID #%d', 'wpforms-lite' ),
						absint( $field['id'] )
					);
				}

$message    .= '--- ' . $field_name . " ---\r\n\r\n";
				$field_value = $field_val . "\r\n\r\n";
				$message    .= apply_filters( 'wpforms_plaintext_field_value', $field_value, $field, $this->form_data );
			}
		}

if ( empty( $message ) ) {
			$empty_message = esc_html__( 'An empty form was submitted.', 'wpforms-lite' );
			$message       = $is_html_email ? wpautop( $empty_message ) : $empty_message;
		}

return $message;
	}

/**
	 * Email kill switch if needed.
	 *
	 * @since 1.1.3
	 *
	 * @return bool
	 */
	public function is_email_disabled() {

return (bool) apply_filters( 'wpforms_disable_all_emails', false, $this );
	}

/**
	 * Get the enabled email template.
	 *
	 * @since 1.1.3
	 *
	 * @return string When filtering return 'none' to switch to text/plain email.
	 */
	public function get_template() {

if ( ! $this->template ) {
			$this->template = wpforms_setting( 'email-template', 'default' );
		}

return apply_filters( 'wpforms_email_template', $this->template );
	}

/**
	 * Retrieve a template part. Taken from bbPress.
	 *
	 * @since 1.1.3
	 *
	 * @param string $slug Template file slug.
	 * @param string $name Optional. Default null.
	 * @param bool   $load Maybe load.
	 *
	 * @return string
	 */
	public function get_template_part( $slug, $name = null, $load = true ) {

// Setup possible parts.
		$templates = array();
		if ( isset( $name ) ) {
			$templates[] = $slug . '-' . $name . '.php';
		}
		$templates[] = $slug . '.php';

// Return the part that is found.
		return $this->locate_template( $templates, $load, false );
	}

/**
	 * Retrieve the name of the highest priority template file that exists.
	 *
	 * Search in the STYLESHEETPATH before TEMPLATEPATH so that themes which
	 * inherit from a parent theme can just overload one file. If the template is
	 * not found in either of those, it looks in the theme-compat folder last.
	 *
	 * Taken from bbPress.
	 *
	 * @since 1.1.3
	 *
	 * @param string|array $template_names Template file(s) to search for, in order.
	 * @param bool         $load           If true the template file will be loaded if it is found.
	 * @param bool         $require_once   Whether to require_once or require. Default true.
	 *                                     Has no effect if $load is false.
	 *
	 * @return string The template filename if one is located.
	 */
	public function locate_template( $template_names, $load = false, $require_once = true ) {

// No file found yet.
		$located = false;

// Try to find a template file.
		foreach ( (array) $template_names as $template_name ) {

// Continue if template is empty.
			if ( empty( $template_name ) ) {
				continue;
			}

// Trim off any slashes from the template name.
			$template_name = ltrim( $template_name, '/' );

// Try locating this template file by looping through the template paths.
			foreach ( $this->get_theme_template_paths() as $template_path ) {
				if ( file_exists( $template_path . $template_name ) ) {
					$located = $template_path . $template_name;
					break;
				}
			}
		}

if ( ( true === $load ) && ! empty( $located ) ) {
			load_template( $located, $require_once );
		}

return $located;
	}

/**
	 * Return a list of paths to check for template locations
	 *
	 * @since 1.1.3
	 *
	 * @return array
	 */
	public function get_theme_template_paths() {

$template_dir = 'wpforms-email';

$file_paths = array(
			1   => trailingslashit( get_stylesheet_directory() ) . $template_dir,
			10  => trailingslashit( get_template_directory() ) . $template_dir,
			100 => WPFORMS_PLUGIN_DIR . 'includes/emails/templates',
		);

$file_paths = apply_filters( 'wpforms_email_template_paths', $file_paths );

// Sort the file paths based on priority.
		ksort( $file_paths, SORT_NUMERIC );

return array_map( 'trailingslashit', $file_paths );
	}

/**
	 * Perform email subject preparation: process tags, remove new lines, etc.
	 *
	 * @since 1.6.1
	 *
	 * @param string $subject Email subject to post-process.
	 *
	 * @return string
	 */
	private function get_prepared_subject( $subject ) {

$subject = $this->process_tag( $subject );

$subject = trim( str_replace( [ "\r\n", "\r", "\n" ], ' ', $subject ) );

return wpforms_decode_string( $subject );
	}
}