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<?php

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/**

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* Mail.

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* @package Smush\Core

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namespace Smush\Core\Modules\Helpers;

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defined( 'ABSPATH' ) || exit;

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/**

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* Class Mail

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abstract class Mail {

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/**

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* Identifier

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* @var mixed

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* @access protected

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protected $identifier;

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/**

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* Whitelabel class.

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* @var Whitelabel

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protected $whitelabel;

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/**

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* Constructor.

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* @param string $identifier Identifier.

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public function __construct( $identifier ) {

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$this->identifier = $identifier;

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$this->whitelabel = new WhiteLabel();

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}

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/**

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* Get first blog admin.

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* @return null|WP_User.

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private function get_blog_admin() {

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$admins = get_users(

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array(

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'role' => 'administrator',

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'orderby' => 'ID',

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'order' => 'ASC',

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'limit' => 1,

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)

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);

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if ( ! empty( $admins ) ) {

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return $admins[0];

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}

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}

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/**

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* Get user meta data of recipient.

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* @return false|WP_User

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protected function get_recipient_meta() {

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$admin_id = (int) apply_filters( $this->identifier . '_mail_admin_id', 0 );

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if ( $admin_id > 0 ) {

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$user_data = get_user_by( 'id', $admin_id );

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if ( ! empty( $user_data ) ) {

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return $user_data;

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}

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}

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$blog_admin = get_user_by( 'email', get_option( 'admin_email' ) );

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if ( empty( $blog_admin ) ) {

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$blog_admin = $this->get_blog_admin();

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}

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return $blog_admin;

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}

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/**

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* Get first name of recipient.

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public function get_recipient_name() {

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$user_data = $this->get_recipient_meta();

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if ( empty( $user_data ) ) {

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return 'Sir';

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}

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return ! empty( $user_data->first_name ) ? $user_data->first_name : $user_data->display_name;

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}

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/**

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* Get mail recipients.

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* @return array

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public function get_mail_recipients() {

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$recipients = (array) apply_filters( $this->identifier . '_get_mail_recipients', array() );

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if ( ! empty( $recipients ) ) {

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return $recipients;

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}

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$user_data = $this->get_recipient_meta();

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if ( ! empty( $user_data->user_email ) ) {

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$recipients[] = $user_data->user_email;

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}

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if ( empty( $recipients ) ) {

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$recipients[] = get_option( 'admin_email' );

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}

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return $recipients;

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}

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/**

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* Send an email.

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public function send_email() {

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$mail_attributes = array(

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'to' => $this->get_mail_recipients(),

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'subject' => $this->get_mail_subject(),

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'message' => $this->get_mail_message(),

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'headers' => $this->get_mail_headers(),

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);

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$modified_attributes = apply_filters( $this->identifier . '_mail_attributes', $mail_attributes );

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if ( is_array( $modified_attributes ) && $modified_attributes !== $mail_attributes ) {

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$mail_attributes = wp_parse_args( $modified_attributes, $mail_attributes );

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}

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$sender_email_callback = array( $this, 'custom_sender_email' );

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$sender_name_callback = array( $this, 'custom_sender_name' );

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$priority = - 10; // Let other plugins take over

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add_filter( 'wp_mail_from', $sender_email_callback, $priority );

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add_filter( 'wp_mail_from_name', $sender_name_callback, $priority );

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// Send email.

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$sent = wp_mail( $mail_attributes['to'], $mail_attributes['subject'], $mail_attributes['message'], $mail_attributes['headers'] );

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remove_filter( 'wp_mail_from', $sender_email_callback, $priority );

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remove_filter( 'wp_mail_from_name', $sender_name_callback, $priority );

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return $sent;

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}

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/**

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* Get email header.

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* @return array

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protected function get_mail_headers() {

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return array( 'Content-Type: text/html; charset=UTF-8' );

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}

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/**

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* Retrieve noreply email.

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* @return string

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public function get_noreply_email() {

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$noreply_email = apply_filters( $this->identifier . '_noreply_email', null );

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if ( $noreply_email && filter_var( $noreply_email, FILTER_VALIDATE_EMAIL ) ) {

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return $noreply_email;

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}

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// Get the site domain and get rid of www.

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$sitename = wp_parse_url( network_home_url(), PHP_URL_HOST );

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$noreply_email = 'noreply@';

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if ( null !== $sitename ) {

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if ( 'www.' === substr( $sitename, 0, 4 ) ) {

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$sitename = substr( $sitename, 4 );

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}

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$noreply_email .= $sitename;

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}

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return $noreply_email;

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}

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/**

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* Custom sender email.

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* @return string

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public function custom_sender_email() {

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return $this->get_noreply_email();

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}

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/**

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* Custom sender name.

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* @return string

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public function custom_sender_name() {

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return $this->get_sender_name();

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}

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/**

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* Get mail subject.

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* @return string

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abstract protected function get_mail_message();

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/**

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* Get mail subject.

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* @return string

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abstract protected function get_mail_subject();

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/**

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* Get sender name.

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* @return string

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abstract protected function get_sender_name();

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}

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