<?php

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defined('ABSPATH') || exit;

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abstract class Builder_Optin_Service {

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public static abstract function get_id():string;

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/**

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* Provider Name

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*/

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public static abstract function get_label(): string;

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/**

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* Module options, displayed in the Optin module form

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*/

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public static abstract function get_settings():array;

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/**

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* Provider options that are not unique to each module

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* These are displayed in the Builder settings page

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*/

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public static abstract function get_global_options():array;

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/**

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* Retrieves the $fields_args from module and determines if there is valid form to show.

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*/

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public static abstract function validate_data(array $fields_args):string;

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protected static function init():void{}

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/**

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* Checks whether this service is available.

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*/

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public static function is_available():bool {

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return true;

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}

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/**

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* Creates or returns an instance of this class.

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*/

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public static function run():void {

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if (is_admin()) {

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add_action('wp_ajax_tb_optin_clear_cache', array(__CLASS__, 'ajax_clear_cache'));

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add_action('wp_ajax_tb_optin_subscribe', array(__CLASS__, 'ajax_subscribe'));

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add_action('wp_ajax_nopriv_tb_optin_subscribe', array(__CLASS__, 'ajax_subscribe'));

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}

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}

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/**

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* Initialize data providers for the module

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*

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* Other plugins or themes can extend or add to this list

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* by using the "builder_optin_services" filter.

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*/

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private static function init_providers($type = 'all'):array {

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$coreList=array(

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'mailchimp' => 'Builder_Optin_Service_MailChimp',

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'activecampaign' => 'Builder_Optin_Service_ActiveCampaign',

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'convertkit' => 'Builder_Optin_Service_ConvertKit',

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'getresponse' => 'Builder_Optin_Service_GetResponse',

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'mailerlite' => 'Builder_Optin_Service_MailerLite',

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'newsletter' => 'Builder_Optin_Service_Newsletter',

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);

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$providers=[];

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$providersList = apply_filters('builder_optin_services',$coreList);

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if ( $type !== 'all' ) {

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if ( ! isset( $providersList[ $type ] ) ) {

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return $providers;

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}

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$providersList = array( $type => $providersList[ $type ] );

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}

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$dir = __DIR__ .DIRECTORY_SEPARATOR;

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foreach ( $providersList as $id => $provider ) {

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$path=isset($coreList[$id])?($dir . $id):$id;

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include_once( $path . '.php' );

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if ( class_exists( $provider,false ) && $provider::is_available() ) {

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$provider::init();

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$providers[ $id ] = $provider;

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}

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}

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return $providers;

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}

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/**

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* Helper function to retrieve list of providers or provider instance

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*/

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public static function get_providers(string $id='all',bool $is_v75=false) {

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$providers= self::init_providers($id);

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if($id==='all'){

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return $providers;

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}

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if(!isset($providers[ $id ])){

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return null;

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}

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$class=$providers[ $id ];

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return $is_v75===true?$class:new $class();

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}

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/**

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* Handles the Ajax request for subscription form

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*

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* Hooked to wp_ajax_tb_optin_subscribe

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*/

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public static function ajax_subscribe() {

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if (!isset($_POST['tb_optin_provider'], $_POST['tb_optin_fname'], $_POST['tb_optin_lname'], $_POST['tb_optin_email'], $_POST['tb_post_id'], $_POST['tb_element_id'])) {

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wp_send_json_error(array('error' => __('Required fields are empty.', 'themify')));

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}

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$module = Themify_Builder_Component_Module::get_element_settings( $_POST['tb_post_id'], $_POST['tb_element_id'] );

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if ( ! $module ) {

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die;

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}

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/* CAPTCHA validation */

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if ( isset( $module['captcha'] ) ) {

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$provider = $module['captcha'] === 'on' ? 'recaptcha' : 'hcaptcha';

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$response =

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$provider === 'recaptcha' && ! empty( $_POST['g-recaptcha-response'] ) ? $_POST['g-recaptcha-response']

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: ( $provider === 'hcaptcha' && ! empty( $_POST['h-captcha-response'] ) ? $_POST['h-captcha-response'] : null );

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if ( $response ) {

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$result = Themify_Builder_Model::validate_captcha( $provider, $response );

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if ( is_wp_error( $result ) ) {

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wp_send_json_error( [ 'error' => $result->get_error_message() ] );

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}

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} else {

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wp_send_json_error( [ 'error' => __( 'Empty Captcha response.', 'themify' ) ] );

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}

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}

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$data = array();

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foreach ($_POST as $key => $value) {

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// remove "tb_optin_" prefix from the $_POST data

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$key = preg_replace('/^tb_optin_/', '', $key);

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$data[$key] = sanitize_text_field(trim($value));

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}

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if ($provider = self::get_providers($data['provider'],true)) {

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$result = $provider::subscribe($data);

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if (is_wp_error($result)) {

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wp_send_json_error(array('error' => $result->get_error_message()));

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} else {

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wp_send_json_success(array(

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/* send name and email in GET, these may come useful when building the page that the visitor will be redirected to */

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'redirect' => add_query_arg(array(

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'fname' => $data['fname'],

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'lname' => $data['lname'],

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'email' => $data['email'],

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), $data['redirect'])

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));

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}

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} else {

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wp_send_json_error(array('error' => __('Unknown provider.', 'themify')));

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}

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}

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public static function ajax_clear_cache() {

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check_ajax_referer('tf_nonce', 'nonce');

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if (current_user_can('manage_options') && Themify_Access_Role::check_access_backend()) {

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$providers = self::get_providers('all',true);

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foreach ($providers as $id => $instance) {

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$instance::clear_cache();

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}

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wp_send_json_success();

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}

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wp_send_json_error();

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}

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/**

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* Returns the value of a setting

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*/

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protected static function get($id, $default = null):?string {

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if ($value = themify_builder_get("setting-{$id}", "setting-{$id}")) {

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return $value;

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} else {

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return $default;

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}

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}

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protected static function get_api_key():?string {

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return static::get(static::get_id() . '_key');

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}

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/**

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* Action to perform when Clear Cache is requested

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*/

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public static function clear_cache():void {

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$key = static::get_api_key();

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if (!empty($key)) {

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$id = static::get_id();

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delete_transient('tb_optin_' . $id . '_' . md5($key));

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Themify_Storage::delete('tb_optin_' . $id . '_' . $key);

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}

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}

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/**

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* Get list of provider

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*

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* @return string|Array

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*/

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protected static function get_lists(?string $key = '') {

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if ($key === '') {

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$key = static::get_api_key();

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}

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if (empty($key)) {

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return sprintf(__('%s API Key is missing.', 'themify'), static::get_label());

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}

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$id = static::get_id();

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$cache_key = 'tb_optin_' . $id . '_' . $key;

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if (false === ( $lists = Themify_Storage::get($cache_key) )) {

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delete_transient('tb_optin_' . $id . '_' . md5($key));

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if (is_wp_error(( $data = static::request_list()))) {

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return $data->get_error_message();

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}

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Themify_Storage::set($cache_key, $data, MONTH_IN_SECONDS);

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return $data;

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}

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else {

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return json_decode($lists, true);

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}

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}

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/**

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* Subscribe visitor to the mailing list

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*

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* @param $args array( 'fname', 'lname', 'email' )

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* it also includes options from get_options() method with their values.

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*

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* @return WP_Error|true

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*/

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public static function subscribe(array $args) {

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return true;

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}

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}

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Builder_Optin_Service::run();

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