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<?php

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/**

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* Contact form helper functions

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/**

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* Wrapper function of WPCF7_ContactForm::get_instance().

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* @param WPCF7_ContactForm|WP_Post|int $post Object or post ID.

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* @return WPCF7_ContactForm|null Contact form object. Null if unset.

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function wpcf7_contact_form( $post ) {

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return WPCF7_ContactForm::get_instance( $post );

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}

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/**

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* Searches for a contact form by an old unit ID.

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* @param int $old_id Old unit ID.

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* @return WPCF7_ContactForm Contact form object.

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function wpcf7_get_contact_form_by_old_id( $old_id ) {

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global $wpdb;

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$q = "SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_old_cf7_unit_id'"

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. $wpdb->prepare( " AND meta_value = %d", $old_id );

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if ( $new_id = $wpdb->get_var( $q ) ) {

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return wpcf7_contact_form( $new_id );

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}

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}

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/**

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* Searches for a contact form by a hash string.

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* @param string $hash Part of a hash string.

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* @return WPCF7_ContactForm Contact form object.

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function wpcf7_get_contact_form_by_hash( $hash ) {

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global $wpdb;

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$hash = trim( $hash );

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if ( strlen( $hash ) < 7 ) {

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return null;

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}

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$like = $wpdb->esc_like( $hash ) . '%';

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$q = "SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_hash'"

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. $wpdb->prepare( " AND meta_value LIKE %s", $like );

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if ( $post_id = $wpdb->get_var( $q ) ) {

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return wpcf7_contact_form( $post_id );

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}

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}

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/**

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* Searches for a contact form by title.

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* @param string $title Title of contact form.

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* @return WPCF7_ContactForm|null Contact form object if found, null otherwise.

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function wpcf7_get_contact_form_by_title( $title ) {

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if ( ! is_string( $title ) or '' === $title ) {

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return null;

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}

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$contact_forms = WPCF7_ContactForm::find( array(

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'title' => $title,

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'posts_per_page' => 1,

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) );

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if ( $contact_forms ) {

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return wpcf7_contact_form( reset( $contact_forms ) );

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}

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}

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/**

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* Wrapper function of WPCF7_ContactForm::get_current().

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* @return WPCF7_ContactForm Contact form object.

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function wpcf7_get_current_contact_form() {

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if ( $current = WPCF7_ContactForm::get_current() ) {

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return $current;

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}

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}

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/**

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* Returns true if it is in the state that a non-Ajax submission is accepted.

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function wpcf7_is_posted() {

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if ( ! $contact_form = wpcf7_get_current_contact_form() ) {

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return false;

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}

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return $contact_form->is_posted();

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}

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/**

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* Retrieves the user input value through a non-Ajax submission.

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* @param string $name Name of form control.

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* @param string $default_value Optional default value.

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* @return string The user input value through the form-control.

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function wpcf7_get_hangover( $name, $default_value = null ) {

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if ( ! wpcf7_is_posted() ) {

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return $default_value;

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}

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$submission = WPCF7_Submission::get_instance();

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if ( ! $submission

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or $submission->is( 'mail_sent' ) ) {

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return $default_value;

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}

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return isset( $_POST[$name] ) ? wp_unslash( $_POST[$name] ) : $default_value;

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}

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/**

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* Retrieves an HTML snippet of validation error on the given form control.

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* @param string $name Name of form control.

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* @return string Validation error message in a form of HTML snippet.

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function wpcf7_get_validation_error( $name ) {

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if ( ! $contact_form = wpcf7_get_current_contact_form() ) {

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return '';

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}

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return $contact_form->validation_error( $name );

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}

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/**

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* Returns a reference key to a validation error message.

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* @param string $name Name of form control.

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* @param string $unit_tag Optional. Unit tag of the contact form.

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* @return string Reference key code.

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function wpcf7_get_validation_error_reference( $name, $unit_tag = '' ) {

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if ( '' === $unit_tag ) {

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$contact_form = wpcf7_get_current_contact_form();

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if ( $contact_form and $contact_form->validation_error( $name ) ) {

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$unit_tag = $contact_form->unit_tag();

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} else {

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return null;

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}

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}

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return preg_replace( '/[^0-9a-z_-]+/i', '',

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sprintf(

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'%1$s-ve-%2$s',

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$unit_tag,

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$name

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)

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);

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}

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/**

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* Retrieves a message for the given status.

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function wpcf7_get_message( $status ) {

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if ( ! $contact_form = wpcf7_get_current_contact_form() ) {

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return '';

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}

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return $contact_form->message( $status );

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}

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/**

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* Returns a class names list for a form-tag of the specified type.

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* @param string $type Form-tag type.

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* @param string $default_classes Optional default classes.

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* @return string Whitespace-separated list of class names.

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function wpcf7_form_controls_class( $type, $default_classes = '' ) {

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$type = trim( $type );

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if ( is_string( $default_classes ) ) {

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$default_classes = explode( ' ', $default_classes );

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}

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$classes = array(

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'wpcf7-form-control',

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sprintf( 'wpcf7-%s', rtrim( $type, '*' ) ),

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);

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if ( str_ends_with( $type, '*' ) ) {

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$classes[] = 'wpcf7-validates-as-required';

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}

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$classes = array_merge( $classes, $default_classes );

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$classes = array_filter( array_unique( $classes ) );

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return implode( ' ', $classes );

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}

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/**

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* Callback function for the contact-form-7 shortcode.

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function wpcf7_contact_form_tag_func( $atts, $content = null, $code = '' ) {

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if ( is_feed() ) {

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return '[contact-form-7]';

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}

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if ( 'contact-form-7' === $code ) {

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$atts = shortcode_atts(

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array(

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'id' => '',

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'title' => '',

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'html_id' => '',

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'html_name' => '',

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'html_title' => '',

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'html_class' => '',

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'output' => 'form',

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$atts, 'wpcf7'

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);

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$id = trim( $atts['id'] );

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$title = trim( $atts['title'] );

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$contact_form = wpcf7_get_contact_form_by_hash( $id );

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if ( ! $contact_form ) {

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$contact_form = wpcf7_contact_form( $id );

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}

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if ( ! $contact_form ) {

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$contact_form = wpcf7_get_contact_form_by_title( $title );

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}

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} else {

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if ( is_string( $atts ) ) {

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$atts = explode( ' ', $atts, 2 );

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}

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$id = (int) array_shift( $atts );

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$contact_form = wpcf7_get_contact_form_by_old_id( $id );

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}

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if ( ! $contact_form ) {

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return sprintf(

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'<p class="wpcf7-contact-form-not-found"><strong>%1$s</strong> %2$s</p>',

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esc_html( __( 'Error:', 'contact-form-7' ) ),

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esc_html( __( "Contact form not found.", 'contact-form-7' ) )

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);

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}

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$callback = static function ( $contact_form, $atts ) {

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return $contact_form->form_html( $atts );

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};

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$output = wpcf7_switch_locale(

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$contact_form->locale(),

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$callback,

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$contact_form, $atts

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);

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do_action( 'wpcf7_shortcode_callback', $contact_form, $atts );

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return $output;

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}

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/**

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* Saves the contact form data.

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function wpcf7_save_contact_form( $data = '', $context = 'save' ) {

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$data = wp_parse_args( $data, array(

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'id' => -1,

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'title' => null,

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'locale' => null,

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'form' => null,

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'mail' => null,

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'mail_2' => null,

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'messages' => null,

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'additional_settings' => null,

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) );

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$data = wp_unslash( $data );

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$data['id'] = (int) $data['id'];

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if ( -1 == $data['id'] ) {

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$contact_form = WPCF7_ContactForm::get_template();

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} else {

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$contact_form = wpcf7_contact_form( $data['id'] );

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}

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if ( empty( $contact_form ) ) {

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return false;

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}

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if ( null !== $data['title'] ) {

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$contact_form->set_title( $data['title'] );

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}

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if ( null !== $data['locale'] ) {

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$contact_form->set_locale( $data['locale'] );

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}

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$properties = array();

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if ( null !== $data['form'] ) {

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$properties['form'] = wpcf7_sanitize_form( $data['form'] );

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}

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if ( null !== $data['mail'] ) {

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$properties['mail'] = wpcf7_sanitize_mail( $data['mail'] );

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$properties['mail']['active'] = true;

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}

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if ( null !== $data['mail_2'] ) {

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$properties['mail_2'] = wpcf7_sanitize_mail( $data['mail_2'] );

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}

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if ( null !== $data['messages'] ) {

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$properties['messages'] = wpcf7_sanitize_messages( $data['messages'] );

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}

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if ( null !== $data['additional_settings'] ) {

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$properties['additional_settings'] = wpcf7_sanitize_additional_settings(

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$data['additional_settings']

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);

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}

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$contact_form->set_properties( $properties );

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do_action( 'wpcf7_save_contact_form', $contact_form, $data, $context );

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if ( 'save' == $context ) {

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$contact_form->save();

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}

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return $contact_form;

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}

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/**

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* Sanitizes the form property data.

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function wpcf7_sanitize_form( $input, $default_template = '' ) {

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if ( null === $input ) {

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return $default_template;

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}

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$output = trim( $input );

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if ( ! current_user_can( 'unfiltered_html' ) ) {

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$output = wpcf7_kses( $output, 'form' );

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}

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return $output;

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}

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/**

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* Sanitizes the mail property data.

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function wpcf7_sanitize_mail( $input, $defaults = array() ) {

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$input = wp_parse_args( $input, array(

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'active' => false,

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'subject' => '',

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'sender' => '',

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'recipient' => '',

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'body' => '',

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'additional_headers' => '',

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'attachments' => '',

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'use_html' => false,

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'exclude_blank' => false,

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) );

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$input = wp_parse_args( $input, $defaults );

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$output = array();

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$output['active'] = (bool) $input['active'];

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$output['subject'] = trim( $input['subject'] );

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$output['sender'] = trim( $input['sender'] );

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$output['recipient'] = trim( $input['recipient'] );

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$output['body'] = trim( $input['body'] );

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if ( ! current_user_can( 'unfiltered_html' ) ) {

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$output['body'] = wpcf7_kses( $output['body'], 'mail' );

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}

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$output['additional_headers'] = '';

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$headers = str_replace( "\r\n", "\n", $input['additional_headers'] );

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$headers = explode( "\n", $headers );

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foreach ( $headers as $header ) {

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$header = trim( $header );

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if ( '' !== $header ) {

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$output['additional_headers'] .= $header . "\n";

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}

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}

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$output['additional_headers'] = trim( $output['additional_headers'] );

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$output['attachments'] = trim( $input['attachments'] );

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$output['use_html'] = (bool) $input['use_html'];

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$output['exclude_blank'] = (bool) $input['exclude_blank'];

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return $output;

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}

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/**

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* Sanitizes the messages property data.

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function wpcf7_sanitize_messages( $input, $defaults = array() ) {

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$output = array();

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foreach ( wpcf7_messages() as $key => $val ) {

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if ( isset( $input[$key] ) ) {

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$output[$key] = trim( $input[$key] );

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} elseif ( isset( $defaults[$key] ) ) {

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$output[$key] = $defaults[$key];

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}

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}

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return $output;

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}

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/**

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* Sanitizes the additional settings property data.

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function wpcf7_sanitize_additional_settings( $input, $default_template = '' ) {

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if ( null === $input ) {

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return $default_template;

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}

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$output = trim( $input );

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return $output;

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}

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/**

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* Generates a random hash string for a contact form.

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* @param int $post_id Post ID.

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* @return string SHA-1 hash.

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function wpcf7_generate_contact_form_hash( $post_id ) {

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return sha1( implode( '|', array(

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get_current_user_id(),

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$post_id,

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time(),

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home_url(),

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) ) );

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}

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