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<?php
abstract class MC4WP_Integration {
/**
* @var string
*/
protected $type = 'integration';
/**
* @var string
*/
protected $checkbox_name = '_mc4wp_subscribe';
/**
* @var array
*/
protected $options;
/**
* Constructor
*/
public function __construct() {
$this->checkbox_name = '_mc4wp_subscribe' . '_' . $this->type;
}
/**
* Get the checkbox options
*
* @return array
*/
public function get_options() {
if( $this->options === null ) {
$this->options = mc4wp_get_options( 'checkbox' );
}
return $this->options;
}
/**
* Is this a spam request?
*
* @return bool
*/
protected function is_spam() {
// check if honeypot was filled
if( $this->is_honeypot_filled() ) {
return true;
}
// check user agent
if( ! isset( $_SERVER['HTTP_USER_AGENT'] ) || strlen( $_SERVER['HTTP_USER_AGENT'] ) < 2 ) {
return true;
}
/**
* @filter `mc4wp_is_spam`
* @expects boolean True if this is a spam request
* @default false
*/
return apply_filters( 'mc4wp_is_spam', false );
}
/**
* Was the honeypot filled?
*
* @return bool
*/
protected function is_honeypot_filled() {
// Check if honeypot was filled (by spam bots)
if( isset( $_POST['_mc4wp_required_but_not_really'] ) && ! empty( $_POST['_mc4wp_required_but_not_really'] ) ) {
return true;
}
return false;
}
/**
* Should the checkbox be pre-checked?
*
* @return bool
*/
public function is_prechecked() {
$opts = $this->get_options();
return (bool) $opts['precheck'];
}
/**
* Get the text for the label element
*
* @return string
*/
public function get_label_text() {
$opts = $this->get_options();
// Get general label text
$label = $opts['label'];
// Override label text if a specific text for this integration is set
if ( isset( $opts['text_' . $this->type . '_label'] ) && ! empty( $opts['text_' . $this->type . '_label'] ) ) {
// custom label text was set
$label = $opts['text_' . $this->type . '_label'];
}
// replace label variables
$label = MC4WP_Tools::replace_variables( $label, array(), array_values( $opts['lists'] ) );
return $label;
}
/**
* @return bool
*/
public function checkbox_was_checked() {
return ( isset( $_POST[ $this->checkbox_name ] ) && $_POST[ $this->checkbox_name ] == 1 );
}
/**
* Outputs a checkbox
*/
public function output_checkbox() {
echo $this->get_checkbox();
}
/**
* @param mixed $args Array or string
* @return string
*/
public function get_checkbox( $args = array() ) {
$checked = ( $this->is_prechecked() ) ? 'checked ' : '';
// set label text
if ( isset( $args['labels'][0] ) ) {
// cf 7 shortcode
$label = $args['labels'][0];
} else {
$label = $this->get_label_text();
}
// CF7 checkbox?
if( is_array( $args ) && isset( $args['options'] ) ) {
// check for default:0 or default:1 to set the checked attribute
if( in_array( 'default:1', $args['options'] ) ) {
$checked = 'checked';
} else if( in_array( 'default:0', $args['options'] ) ) {
$checked = '';
}
}
// before checkbox HTML (comment, ...)
$before = '<!-- MailChimp for WordPress v'. MC4WP_LITE_VERSION .' - https://mc4wp.com/ -->';
$before .= apply_filters( 'mc4wp_before_checkbox', '', $this->type );
// checkbox
$content = '<p id="mc4wp-checkbox" class="mc4wp-checkbox-' . $this->type .'">';
$content .= '<label>';
$content .= '<input type="checkbox" name="'. esc_attr( $this->checkbox_name ) .'" value="1" '. $checked . '/> ';
$content .= $label;
$content .= '</label>';
$content .= '</p>';
// after checkbox HTML (..., honeypot, closing comment)
$after = apply_filters( 'mc4wp_after_checkbox', '', $this->type );
$after .= '<div style="display: none;"><input type="text" name="_mc4wp_required_but_not_really" value="" tabindex="-1" autocomplete="off" /></div>';
$after .= '<!-- / MailChimp for WordPress -->';
return $before . $content . $after;
}
/**
* @return array
*/
protected function get_lists() {
// get checkbox lists options
$opts = $this->get_options();
$lists = $opts['lists'];
// get lists from request, if set.
if( ! empty( $_POST['_mc4wp_lists'] ) ) {
$lists = $_POST['_mc4wp_lists'];
// make sure lists is an array
if( ! is_array( $lists ) ) {
// sanitize value
$lists = sanitize_text_field( $lists );
$lists = array_map( 'trim', explode( ',', $lists ) );
}
}
// allow plugins to filter final lists value
$lists = (array) apply_filters( 'mc4wp_lists', $lists );
return $lists;
}
/**
* Makes a subscription request
*
* @param string $email
* @param array $merge_vars
* @param string $type
* @param int $related_object_id
* @return string|boolean
*/
protected function subscribe( $email, array $merge_vars = array(), $type = '', $related_object_id = 0 ) {
$type = ( '' !== $type ) ? $type : $this->type;
$api = mc4wp_get_api();
$opts = $this->get_options();
$lists = $this->get_lists();
if( empty( $lists) ) {
// show helpful error message to admins, but only if not using ajax
if( $this->show_error_messages() ) {
wp_die(
'<h3>' . __( 'MailChimp for WordPress - Error', 'mailchimp-for-wp' ) . '</h3>' .
'<p>' . sprintf( __( 'Please select a list to subscribe to in the <a href="%s">checkbox settings</a>.', 'mailchimp-for-wp' ), admin_url( 'admin.php?page=mailchimp-for-wp-checkbox-settings' ) ) . '</p>' .
'<p style="font-style:italic; font-size:12px;">' . __( 'This message is only visible to administrators for debugging purposes.', 'mailchimp-for-wp' ) . '</p>',
__( 'MailChimp for WordPress - Error', 'mailchimp-for-wp' ),
array( 'back_link' => true )
);
}
return 'no_lists_selected';
}
$merge_vars = MC4WP_Tools::guess_merge_vars( $merge_vars );
// set ip address
if( ! isset( $merge_vars['OPTIN_IP'] ) ) {
$merge_vars['OPTIN_IP'] = MC4WP_Tools::get_client_ip();
}
$result = false;
/**
* @filter `mc4wp_merge_vars`
* @expects array
* @param array $merge_vars
* @param string $type
*
* Use this to filter the final merge vars before the request is sent to MailChimp
*/
$merge_vars = apply_filters( 'mc4wp_merge_vars', $merge_vars, $type );
/**
* @filter `mc4wp_merge_vars`
* @expects string
* @param string $email_type
*
* Use this to change the email type this users should receive
*/
$email_type = apply_filters( 'mc4wp_email_type', 'html' );
/**
* @action `mc4wp_before_subscribe`
* @param string $email
* @param array $merge_vars
*
* Runs before the request is sent to MailChimp
*/
do_action( 'mc4wp_before_subscribe', $email, $merge_vars );
foreach( $lists as $list_id ) {
$result = $api->subscribe( $list_id, $email, $merge_vars, $email_type, $opts['double_optin'], $opts['update_existing'], true, $opts['send_welcome'] );
do_action( 'mc4wp_subscribe', $email, $list_id, $merge_vars, $result, 'checkbox', $type, $related_object_id );
}
/**
* @action `mc4wp_after_subscribe`
* @param string $email
* @param array $merge_vars
* @param boolean $result
*
* Runs after the request is sent to MailChimp
*/
do_action( 'mc4wp_after_subscribe', $email, $merge_vars, $result );
// if result failed, show error message (only to admins for non-AJAX)
if ( $result !== true && $api->has_error() ) {
// log error
error_log( sprintf( 'MailChimp for WordPress (%s): %s', $this->type, $api->get_error_message() ) );
if( $this->show_error_messages() ) {
wp_die( '<h3>' . __( 'MailChimp for WordPress - Error', 'mailchimp-for-wp' ) . '</h3>' .
'<p>' . __( 'The MailChimp server returned the following error message as a response to our sign-up request:', 'mailchimp-for-wp' ) . '</p>' .
'<pre>' . $api->get_error_message() . '</pre>' .
'<p>' . __( 'This is the data that was sent to MailChimp:', 'mailchimp-for-wp' ) . '</p>' .
'<strong>' . __( 'Email address:', 'mailchimp-for-wp' ) . '</strong>' .
'<pre>' . esc_html( $email ) . '</pre>' .
'<strong>' . __( 'Merge variables:', 'mailchimp-for-wp' ) . '</strong>' .
'<pre>' . esc_html( print_r( $merge_vars, true ) ) . '</pre>' .
'<p style="font-style:italic; font-size:12px;">' . __( 'This message is only visible to administrators for debugging purposes.', 'mailchimp-for-wp' ) . '</p>',
__( 'MailChimp for WordPress - Error', 'mailchimp-for-wp' ), array( 'back_link' => true ) );
}
}
return $result;
}
/**
* Should we show error messages?
* - Not for AJAX requests
* - Not for non-admins
* - Not for CF7 requests (which uses a different AJAX mechanism)
*
* @return bool
*/
protected function show_error_messages() {
return ( ! defined( 'DOING_AJAX' ) || ! DOING_AJAX )
&& ( ! isset( $_POST['_wpcf7_is_ajax_call'] ) || $_POST['_wpcf7_is_ajax_call'] != 1 )
&& current_user_can( 'manage_options' );
}
}
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