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<?php
/**
* Class MC4WP_Integration
*
* Base class for all integrations.
*
* Extend this class and implement the `add_hooks` method to get a settings page.
*
* @access public
* @since 3.0
* @abstract
*/
abstract class MC4WP_Integration {
/**
* @var string Name of this integration.
*/
public $name = '';
/**
* @var string Description
*/
public $description = '';
/**
* @var string Slug, used as an unique identifier for this integration.
*/
public $slug = '';
/**
* @var array Array of settings
*/
public $options = array();
/**
* @var string Name attribute for the checkbox element. Will be created from slug if empty.
*/
protected $checkbox_name = '';
/**
* Constructor
*
* @param string $slug
* @param array $options
*/
public function __construct( $slug, array $options ) {
$this->slug = $slug;
$this->options = $this->parse_options( $options );
// if checkbox name is not set, set a good custom value
if( empty( $this->checkbox_name ) ) {
$this->checkbox_name = '_mc4wp_subscribe_' . $this->slug;
}
}
/**
* Return array of default options
*
* @staticvar $defaults
* @return array
*/
protected function get_default_options() {
static $defaults;
if( ! $defaults ) {
$defaults = require MC4WP_PLUGIN_DIR . 'config/default-integration-options.php';
}
return $defaults;
}
/**
* @param array $options
*
* @return array
*/
protected function parse_options( array $options ) {
$slug = $this->slug;
$options = array_merge( $this->get_default_options(), $options );
/**
* Filters options for a specific integration
*
* The dynamic portion of the hook, `$slug`, refers to the slug of the ingration.
*
* @param array $integration_options
* @ignore
*/
return (array) apply_filters( 'mc4wp_' . $slug . '_integration_options', $options );
}
/**
* Initialize the integration
*/
public function initialize() {
$this->add_required_hooks();
$this->add_hooks();
}
/**
* Adds the required hooks for core functionality, like adding checkbox reset CSS.
*/
protected function add_required_hooks() {
if( $this->options['css'] && ! $this->options['implicit'] ) {
add_action( 'wp_head', array( $this, 'print_css_reset' ) );
}
}
/**
* Was integration triggered?
*
* Will always return true when integration is implicit. Otherwise, will check value of checkbox.
*
* @param int $object_id Useful when overriding method. (optional)
* @return bool
*/
public function triggered( $object_id = null ) {
return $this->options['implicit'] || $this->checkbox_was_checked();
}
/**
* Adds the hooks which are specific to this integration
*/
abstract protected function add_hooks();
/**
* Print CSS reset
*
* @hooked `wp_head`
*/
public function print_css_reset() {
$suffix = defined( 'SCRIPT_DEBUG' ) ? '' : '.min';
$css = file_get_contents( MC4WP_PLUGIN_DIR . 'assets/css/checkbox-reset' . $suffix . '.css' );
// replace selector by integration specific selector so the css affects just this checkbox
$css = str_ireplace( '__INTEGRATION_SLUG__', $this->slug, $css );
printf( '<style type="text/css">%s</style>', $css );
}
/**
* Get the text for the label element
*
* @return string
*/
public function get_label_text() {
$integration = $this;
$label = $this->options['label'];
/**
* Filters the checkbox label
*
* @since 3.0
*
* @param string $label
* @param MC4WP_Integration $integration
* @ignore
*/
$label = (string) apply_filters( 'mc4wp_integration_checkbox_label', $label, $integration );
return $label;
}
/**
* Was the integration checkbox checked?
*
* @return bool
*/
public function checkbox_was_checked() {
$data = $this->get_data();
return ( isset( $data[ $this->checkbox_name ] ) && $data[ $this->checkbox_name ] == 1 );
}
/**
* Get a string of attributes for the checkbox element.
*
* @return string
*/
protected function get_checkbox_attributes() {
$integration = $this;
$slug = $this->slug;
$attributes = array();
if( $this->options['precheck'] ) {
$attributes['checked'] = 'checked';
}
/**
* Filters the attributes array.
*
* @param array $attributes
* @param MC4WP_Integration $integration
* @ignore
*/
$attributes = (array) apply_filters( 'mc4wp_integration_checkbox_attributes', $attributes, $integration );
/**
* Filters the attributes array.
*
* The dynamic portion of the hook, `$slug`, refers to the slug for this integration.
*
* @param array $attributes
* @param MC4WP_Integration $integration
* @ignore
*/
$attributes = (array) apply_filters( 'mc4wp_integration_' . $slug . '_checkbox_attributes', $attributes, $integration );
$string = '';
foreach( $attributes as $key => $value ) {
$string .= sprintf( '%s="%s"', $key, esc_attr( $value ) );
}
return $string;
}
/**
* Outputs a checkbox
*/
public function output_checkbox() {
echo $this->get_checkbox_html();
}
/**
* Get HTML for the checkbox
*
* @return string
*/
public function get_checkbox_html() {
$show_checkbox = empty( $this->options['implicit'] );
$integration_slug = $this->slug;
/**
* Filters whether to show the sign-up checkbox for this integration.
*
* @param bool $show_checkbox
* @param string $integration_slug
*/
$show_checkbox = (bool) apply_filters( 'mc4wp_integration_show_checkbox', $show_checkbox, $integration_slug );
if( ! $show_checkbox ) {
return '';
}
ob_start();
echo sprintf( '<!-- MailChimp for WordPress v%s - https://mc4wp.com/ -->', MC4WP_VERSION );
/** @ignore */
do_action( 'mc4wp_integration_before_checkbox_wrapper', $this );
/** @ignore */
do_action( 'mc4wp_integration_'. $this->slug .'_before_checkbox_wrapper', $this );
$wrapper_tag = $this->options['wrap_p'] ? 'p' : 'span';
// Hidden field to make sure "0" is sent to server
echo sprintf( '<input type="hidden" name="%s" value="0" />', esc_attr( $this->checkbox_name ) );
echo sprintf( '<%s class="mc4wp-checkbox mc4wp-checkbox-%s">', $wrapper_tag, esc_attr( $this->slug ) );
echo '<label>';
echo sprintf( '<input type="checkbox" name="%s" value="1" %s />', esc_attr( $this->checkbox_name ), $this->get_checkbox_attributes() );
echo sprintf( '<span>%s</span>', $this->get_label_text() );
echo '</label>';
echo sprintf( '</%s>', $wrapper_tag );
/** @ignore */
do_action( 'mc4wp_integration_after_checkbox_wrapper', $this );
/** @ignore */
do_action( 'mc4wp_integration_'. $this->slug .'_after_checkbox_wrapper', $this );
echo '<!-- / MailChimp for WordPress -->';
$html = ob_get_clean();
return $html;
}
/**
* Get the selected MailChimp lists
*
* @return array Array of List ID's
*/
public function get_lists() {
$data = $this->get_data();
$integration = $this;
$slug = $this->slug;
// get checkbox lists options
$lists = $this->options['lists'];
// get lists from request, if set.
if( ! empty( $data['_mc4wp_lists'] ) ) {
$lists = $data['_mc4wp_lists'];
// ensure lists is an array
if( ! is_array( $lists ) ) {
$lists = explode( ',', $lists );
$lists = array_map( 'trim', $lists );
}
}
// allow plugins to filter final lists value
/**
* This filter is documented elsewhere.
*
* @since 2.0
* @see MC4WP_Form::get_lists
* @ignore
*/
$lists = (array) apply_filters( 'mc4wp_lists', $lists );
/**
* Filters the MailChimp lists this integration should subscribe to
*
* @since 3.0
*
* @param array $lists
* @param MC4WP_Integration $integration
*/
$lists = (array) apply_filters( 'mc4wp_integration_lists', $lists, $integration );
/**
* Filters the MailChimp lists a specific integration should subscribe to
*
* The dynamic portion of the hook, `$slug`, refers to the slug of the integration.
*
* @since 3.0
*
* @param array $lists
* @param MC4WP_Integration $integration
*/
$lists = (array) apply_filters( 'mc4wp_integration_' . $slug . '_lists', $lists, $integration );
return $lists;
}
/**
* Makes a subscription request
*
* @param array $data
* @param int $related_object_id
*
* @return boolean
*/
protected function subscribe( array $data, $related_object_id = 0 ) {
$integration = $this;
$slug = $this->slug;
$mailchimp = new MC4WP_MailChimp();
$log = $this->get_log();
$list_ids = $this->get_lists();
/** @var MC4WP_MailChimp_Subscriber $subscriber */
$subscriber = null;
$result = false;
// validate lists
if( empty( $list_ids ) ) {
$log->warning( sprintf( '%s > No MailChimp lists were selected', $this->name ) );
return false;
}
/**
* Filters data for integration requests.
*
* @param array $data
*/
$data = apply_filters( 'mc4wp_integration_data', $data );
/**
* Filters data for a specific integration request.
*
* The dynamic portion of the hook, `$slug`, refers to the integration slug.
*
* @param array $data
* @param int $related_object_id
*/
$data = apply_filters( "mc4wp_integration_{$slug}_data", $data, $related_object_id );
/**
* @ignore
* @deprecated 4.0
*/
$data = apply_filters( 'mc4wp_merge_vars', $data );
/**
* @deprecated 4.0
* @ignore
*/
$data = apply_filters( 'mc4wp_integration_merge_vars', $data, $integration );
/**
* @deprecated 4.0
* @ignore
*/
$data = apply_filters( "mc4wp_integration_{$slug}_merge_vars", $data, $integration );
$email_type = mc4wp_get_email_type();
$mapper = new MC4WP_List_Data_Mapper( $data, $list_ids );
/** @var MC4WP_MailChimp_Subscriber[] $map */
$map = $mapper->map();
foreach( $map as $list_id => $subscriber ) {
$subscriber->status = $this->options['double_optin'] ? 'pending' : 'subscribed';
$subscriber->email_type = $email_type;
$subscriber->ip_signup = mc4wp_get_request_ip_address();
/** @ignore (documented elsewhere) */
$subscriber = apply_filters( 'mc4wp_subscriber_data', $subscriber );
/**
* Filters subscriber data before it is sent to MailChimp. Only fires for integration requests.
*
* @param MC4WP_MailChimp_Subscriber $subscriber
*/
$subscriber = apply_filters( 'mc4wp_integration_subscriber_data', $subscriber );
/**
* Filters subscriber data before it is sent to MailChimp. Only fires for integration requests.
*
* The dynamic portion of the hook, `$slug`, refers to the integration slug.
*
* @param MC4WP_MailChimp_Subscriber $subscriber
* @param int $related_object_id
*/
$subscriber = apply_filters( "mc4wp_integration_{$slug}_subscriber_data", $subscriber, $related_object_id );
$result = $mailchimp->list_subscribe( $list_id, $subscriber->email_address, $subscriber->to_array(), $this->options['update_existing'], $this->options['replace_interests'] );
}
// if result failed, show error message
if( ! $result ) {
// log error
if( $mailchimp->get_error_code() == 214 ) {
$log->warning( sprintf( "%s > %s is already subscribed to the selected list(s)", $this->name, $subscriber->email_address ) );
} else {
$log->error( sprintf( '%s > MailChimp API Error: %s', $this->name, $mailchimp->get_error_message() ) );
}
// bail
return false;
}
$log->info( sprintf( '%s > Successfully subscribed %s', $this->name, $subscriber->email_address ) );
/**
* Runs right after someone is subscribed using an integration
*
* @since 3.0
*
* @param MC4WP_Integration $integration
* @param string $email_address
* @param array $merge_vars
* @param MC4WP_MailChimp_Subscriber[] $subscriber_data
* @param int $related_object_id
*/
do_action( 'mc4wp_integration_subscribed', $integration, $subscriber->email_address, $subscriber->merge_fields, $map, $related_object_id );
return $result;
}
/**
* Are the required dependencies for this integration installed?
*
* @return bool
*/
public function is_installed() {
return false;
}
/**
* Which UI elements should we show on the settings page for this integration?
*
* @return array
*/
public function get_ui_elements() {
return array_keys( $this->options );
}
/**
* Does integration have the given UI element?
*
* @param $element
* @return bool
*/
public function has_ui_element( $element ) {
$elements = $this->get_ui_elements();
return in_array( $element, $elements );
}
/**
* Return a string to the admin settings page for this object (if any)
*
* @param int $object_id
* @return string
*/
public function get_object_link( $object_id ) {
return '';
}
/**
* Get the data for this integration request
*
* By default, this will return a combination of all $_GET and $_POST parameters.
* Override this method if you need data from somewhere else.
*
* This data should contain the value of the checkbox (required)
* and the lists to which should be subscribed (optional)
*
* @see MC4WP_Integration::$checkbox_name
* @see MC4WP_Integration::get_lists
* @see MC4WP_Integration::checkbox_was_checked
*
* @return array
*/
public function get_data() {
$data = array_merge( (array) $_GET, (array) $_POST );
return $data;
}
/**
* @return MC4WP_Debug_Log
*/
protected function get_log() {
return mc4wp('log');
}
/**
* @return MC4WP_API_v3
*/
protected function get_api() {
return mc4wp('api');
}
}
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