<?php

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namespace WPForms\Integrations\SMTP;

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use WPForms\Integrations\IntegrationInterface;

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/**

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* Notifications class.

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*

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* @since 1.7.6

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*/

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class Notifications implements IntegrationInterface {

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/**

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* Determine if the class is allowed to load.

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*

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* @since 1.7.6

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*

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* @return bool

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*/

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public function allow_load() {

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return wpforms_is_admin_page( 'builder' ) || wpforms_is_admin_ajax();

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}

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/**

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* Load the class.

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*

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* @since 1.7.6

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*/

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public function load() {

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$this->hooks();

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}

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/**

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* Hooks.

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*

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* @since 1.7.6

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*/

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private function hooks() {

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add_filter( 'wpforms_builder_notifications_sender_address_settings', [ $this, 'change_from_email_settings' ], PHP_INT_MIN, 3 );

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add_filter( 'wpforms_builder_notifications_sender_name_settings', [ $this, 'change_from_name_settings' ], PHP_INT_MIN, 3 );

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add_action( 'wp_ajax_wpforms_builder_notification_from_email_validate', [ $this, 'notification_from_email_validate' ] );

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add_filter( 'wpforms_builder_strings', [ $this, 'form_builder_strings' ], 10, 2 );

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}

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/**

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* Validate email.

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*

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* @since 1.8.1

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*/

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public function notification_from_email_validate() {

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check_ajax_referer( 'wpforms-builder', 'nonce' );

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// Before checking if $_POST['email'] is valid email, we need to check if smart tag is used and return its value.

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$email = ! empty( $_POST['email'] ) ? sanitize_text_field( wp_unslash( $_POST['email'] ) ) : '';

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$email = $email ? sanitize_email( wpforms_process_smart_tags( $email, [], [], '', 'smtp-notification-validation' ) ) : '';

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if ( ! is_email( $email ) ) {

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wp_send_json_error(

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sprintf(

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'<div class="wpforms-alert wpforms-alert-warning wpforms-alert-warning-wide">%s</div>',

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__( 'Please enter a valid email address. Your notifications won\'t be sent if the field is not filled in correctly.', 'wpforms-lite' )

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)

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);

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}

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if ( ! $this->email_domain_matches_site_domain( $email ) ) {

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wp_send_json_error( $this->get_warning_message() );

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}

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wp_send_json_success();

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}

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/**

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* Append additional strings for form builder.

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*

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* @since 1.8.1

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*

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* @param array $strings List of strings.

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* @param object $form Current form object.

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*

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* @return array

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*/

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public function form_builder_strings( $strings, $form ) {

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$strings['empty_email_address'] = esc_html__( 'Please enter a valid email address. Your notifications won\'t be sent if the field is not filled in correctly.', 'wpforms-lite' );

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$strings['allow_only_one_email'] = esc_html__( 'Notifications can only use 1 From Email. Please do not enter multiple addresses.', 'wpforms-lite' );

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$strings['allow_only_email_fields'] = esc_html__( 'This smart tag does not point to an Email field in your form.', 'wpforms-lite' );

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return $strings;

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}

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/**

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* Add warning message when email doesn't match site domain.

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*

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* @since 1.7.6

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*

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* @param array $args Field settings.

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* @param array $form_data Form data.

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* @param int $id Notification ID.

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*

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* @return array

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*/

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public function change_from_email_settings( $args, $form_data, $id ) {

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// phpcs:disable WPForms.PHP.ValidateHooks.InvalidHookName

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/** This filter is documented in lite/wpforms-lite.php */

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$from_email_after = apply_filters( 'wpforms_builder_notifications_from_email_after', '', $form_data, $id );

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// phpcs:enable WPForms.PHP.ValidateHooks.InvalidHookName

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if ( ! empty( $from_email_after ) ) {

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$default = [

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'readonly' => true,

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'after' => '<div class="wpforms-alert wpforms-alert-warning">' . $from_email_after . '</div>',

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'input_class' => 'wpforms-disabled',

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'class' => 'from-email wpforms-panel-field-warning',

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];

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} else {

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$default = [

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'class' => 'from-email js-wpforms-from-email-validation',

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'tooltip' => esc_html__( 'Notifications can only use 1 From Email. Please do not enter multiple addresses.', 'wpforms-lite' ),

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];

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}

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$args = wp_parse_args( $args, $default );

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return $args;

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}

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/**

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* Add warning message when name empty.

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*

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* @since 1.8.4

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*

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* @param array $args Field settings.

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* @param array $form_data Form data.

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* @param int $id Notification ID.

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*

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* @return array

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*/

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public function change_from_name_settings( $args, $form_data, $id ) {

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// phpcs:disable WPForms.PHP.ValidateHooks.InvalidHookName

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/** This filter is documented in lite/wpforms-lite.php */

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$from_name_after = apply_filters( 'wpforms_builder_notifications_from_name_after', '', $form_data, $id );

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// phpcs:enable WPForms.PHP.ValidateHooks.InvalidHookName

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if ( ! empty( $from_name_after ) ) {

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$default = [

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'readonly' => true,

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'after' => '<div class="wpforms-alert wpforms-alert-warning">' . $from_name_after . '</div>',

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'input_class' => 'wpforms-disabled',

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'class' => 'from-name wpforms-panel-field-warning',

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];

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} else {

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$default = [

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'class' => 'from-name',

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];

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}

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return wp_parse_args( $args, $default );

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}

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/**

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* Get warning message.

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*

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* @since 1.8.1

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*

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* @return string

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*/

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private function get_warning_message() {

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$site_domain = wp_parse_url( get_bloginfo( 'wpurl' ) )['host'];

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$email_does_not_match_text = sprintf( /* translators: %1$s - WordPress site domain. */

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__( 'The current \'From Email\' address does not match your website domain name (%1$s). This can cause your notification emails to be blocked or marked as spam.', 'wpforms-lite' ),

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esc_html( $site_domain )

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);

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$install_wp_mail_smtp_text = '';

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// If WP Mail SMTP is not active, show a message to install it.

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if (

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! is_plugin_active( 'wp-mail-smtp-pro/wp_mail_smtp.php' ) &&

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! is_plugin_active( 'wp-mail-smtp/wp_mail_smtp.php' )

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) {

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$install_wp_mail_smtp_text .= sprintf(

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wp_kses( /* translators: %1$s - WP Mail SMTP install page URL. */

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__(

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'We strongly recommend that you install the free <a href="%1$s" target="_blank">WP Mail SMTP</a> plugin! The Setup Wizard makes it easy to fix your emails.',

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'wpforms-lite'

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),

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[

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'a' => [

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'href' => [],

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'target' => [],

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],

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]

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),

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esc_url( admin_url( 'admin.php?page=wpforms-smtp' ) )

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);

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}

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$address_match_text = sprintf( /* translators: %1$s - WordPress site domain. */

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__( 'Alternately, try using a From Address that matches your website domain (admin@%1$s).', 'wpforms-lite' ),

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esc_html( $site_domain )

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);

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$fix_email_delivery_text = sprintf(

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wp_kses( /* translators: %1$s - fixing email delivery issues doc URL. */

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__(

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'Please check out our <a href="%1$s" target="_blank" rel="noopener noreferrer">doc on fixing email delivery issues</a> for more details.',

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'wpforms-lite'

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),

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[

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'a' => [

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'href' => [],

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'target' => [],

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'rel' => [],

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],

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]

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),

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esc_url( wpforms_utm_link( 'https://wpforms.com/docs/how-to-fix-wordpress-contact-form-not-sending-email-with-smtp/', 'Builder Notifications', 'Delivery Issues Documentation' ) )

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);

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return sprintf(

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'<div class="wpforms-alert wpforms-alert-warning wpforms-alert-warning-wide"> <p>%1$s</p> <p>%2$s</p> <p>%3$s</p> <p>%4$s</p> </div>',

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$email_does_not_match_text,

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$install_wp_mail_smtp_text,

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$address_match_text,

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$fix_email_delivery_text

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);

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}

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/**

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* Check if the domain name in an email address matches the WordPress site domain.

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*

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* @since 1.7.6

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*

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* @param string $email The email address to check against the WordPress site domain.

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*

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* @return bool

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*/

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private function email_domain_matches_site_domain( $email ) {

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// Process smart tags if they are used as a value.

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$email = wpforms_process_smart_tags( $email, [], [], '', 'smtp-notification-validation' );

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// Skip processing when email is empty or does not set.

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// e.g. {field_id="3"} which we don't have at the moment.

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if ( empty( $email ) ) {

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return true;

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}

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$email_domain = substr( strrchr( $email, '@' ), 1 );

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$site_domain = wp_parse_url( get_bloginfo( 'wpurl' ) )['host'];

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// Check if From email domain ends with site domain.

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return ! empty( $email_domain ) && preg_match( "/\b{$email_domain}$/", $site_domain ) === 1;

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}

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/**

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* Check if the site has any active SMTP plugins.

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*

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* @since 1.7.6

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*

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* @return bool

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*/

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private function has_active_smtp_plugin() {

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// List of plugins from \WPMailSMTP\Conflicts.

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$smtp_plugin_list = [

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'branda-white-labeling/ultimate-branding.php',

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'bws-smtp/bws-smtp.php',

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'cimy-swift-smtp/cimy_swift_smtp.php',

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'disable-emails/disable-emails.php',

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'easy-wp-smtp/easy-wp-smtp.php',

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'fluent-smtp/fluent-smtp.php',

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'gmail-smtp/main.php',

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'mailgun/mailgun.php',

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'my-smtp-wp/my-smtp-wp.php',

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'post-smtp/postman-smtp.php',

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'postman-smtp/postman-smtp.php',

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'postmark-approved-wordpress-plugin/postmark.php',

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'sar-friendly-smtp/sar-friendly-smtp.php',

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'sendgrid-email-delivery-simplified/wpsendgrid.php',

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'smtp-mail/index.php',

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'smtp-mailer/main.php',

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'sparkpost/wordpress-sparkpost.php',

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'turbosmtp/turbo-smtp-plugin.php',

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'woocommerce-sendinblue-newsletter-subscription/woocommerce-sendinblue.php',

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'wp-amazon-ses-smtp/wp-amazon-ses.php',

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'wp-easy-smtp/wp-easy-smtp.php',

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'wp-gmail-smtp/wp-gmail-smtp.php',

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'wp-html-mail/wp-html-mail.php',

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'wp-mail-bank/wp-mail-bank.php',

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'wp-mail-booster/wp-mail-booster.php',

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'wp-mail-smtp-mailer/wp-mail-smtp-mailer.php',

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'wp-mail-smtp-pro/wp_mail_smtp.php',

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'wp-mail-smtp/wp_mail_smtp.php',

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'wp-mailgun-smtp/wp-mailgun-smtp.php',

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'wp-offload-ses/wp-offload-ses.php',

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'wp-sendgrid-smtp/wp-sendgrid-smtp.php',

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'wp-ses/wp-ses.php',

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'wp-smtp/wp-smtp.php',

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'wp-yahoo-smtp/wp-yahoo-smtp.php',

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];

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foreach ( $smtp_plugin_list as $smtp_plugin ) {

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if ( is_plugin_active( $smtp_plugin ) ) {

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return true;

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}

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}

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return false;

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}

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}

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