wpdk-mail.php

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<?php
class WPDKMail extends WPDKPost {

  public $cc = '';

  public $bcc = '';

  private $from = '';

  public function __construct( $mail = null, $post_type = 'page' )
  {
    parent::__construct( $mail, $post_type );
  }

  // -----------------------------------------------------------------------------------------------------------------
  // Public methods
  // -----------------------------------------------------------------------------------------------------------------

  public function send( $to, $subject = false, $from = '', $placeholders = array() ) {

    /* Use shared private property */
    $this->from = $from;

    if ( is_numeric( $this->from ) ) {
      $user = new WP_User( $from );
      $this->from = sprintf( '%s <%s>', $user->data->display_name, $user->get( 'user_email' ) );
    }

    /* $from is as 'NOME <email>', eg: 'wpXtreme <info@wpxtre.me>' */
    if ( empty( $this->from ) ) {
      /* Get the default WordPress email. */
      $this->from = sprintf( '%s <%s>', get_option( 'blogname' ), get_option( 'admin_email' ) );
    }

    /* User id for $to? */
    $user = false;
    if ( is_numeric( $to ) ) {
      $user  = new WP_User( $to );
      $email = sanitize_email( $user->get( 'user_email' ) );

      /* If user has not email exit */
      if ( empty( $email ) ) {
        return;
      }
      $to = sprintf( '  %s <%s>', $user->data->display_name, $user->get( 'user_email' ) );
    }

    if ( $subject === false ) {
      $subject = apply_filters( 'the_title', $this->post_title );
    }

    //$body = apply_filters( 'the_content', $post->post_content );
    $body = $this->post_content;
    $body = $this->replacePlaceholder( $body, $user, $placeholders );

    return wp_mail( $to, $subject, $body, $this->headers() );
  }

  private function headers()
  {
    /* Build the header */
    $headers = array(
      'From: ' . $this->from,
      'Content-Type: text/html'
    );

    /* Added cc and bcc */
    if ( !empty( $this->cc ) ) {
      $this->cc = explode( ',', $this->cc );
      foreach ( $this->cc as $email ) {
        $headers[] = sprintf( 'Cc: %s', $email );
      }
    }

    if ( !empty( $this->bcc ) ) {
      $this->bcc = explode( ',', $this->bcc );
      foreach ( $this->bcc as $email ) {
        $headers[] = sprintf( 'Bcc: %s', $email );
      }
    }

    $headers = apply_filters( 'wpdk_mail_headers', $headers );

    return implode( "\r\n", $headers );
  }

  private function replacePlaceholder( $content, $id_user = false, $extra = array() ) {

    if ( false === $id_user ) {
      $id_user = get_current_user_id();
      $user    = new WP_User( $id_user );
    }
    elseif ( is_object( $id_user ) && is_a( $id_user, 'WP_User' ) ) {
      $user = $id_user;
    }
    elseif ( is_numeric( $id_user ) ) {
      $user = new WP_User( $id_user );
    }
    else {
      return $content;
    }

    $str_replaces = array(
      WPDKMailPlaceholder::USER_FIRST_NAME   => $user->get( 'first_name' ),
      WPDKMailPlaceholder::USER_LAST_NAME    => $user->get( 'last_name' ),
      WPDKMailPlaceholder::USER_DISPLAY_NAME => $user->data->display_name,
      WPDKMailPlaceholder::USER_EMAIL        => $user->data->user_email,
    );

    if ( !empty( $extra ) ) {
      $str_replaces = array_merge( $str_replaces, $extra );
    }

    $str_replaces = apply_filters( 'wpdk_mail_replace_placeholders', $str_replaces, $id_user );

    $content = strtr( $content, $str_replaces );

    return $content;
  }

}

class WPDKMailPlaceholder {

  const USER_DISPLAY_NAME = '${USER_DISPLAY_NAME}';
  const USER_EMAIL        = '${USER_EMAIL}';
  const USER_FIRST_NAME   = '${USER_FIRST_NAME}';
  const USER_LAST_NAME    = '${USER_LAST_NAME}';

  public static function placeholders() {
    $placeholders = array(
      self::USER_FIRST_NAME   => array(
        __( 'User First name', WPDK_TEXTDOMAIN ),
        'Core'
      ),
      self::USER_LAST_NAME    => array(
        __( 'User Last name', WPDK_TEXTDOMAIN ),
        'Core'
      ),
      self::USER_DISPLAY_NAME => array(
        __( 'User Display name', WPDK_TEXTDOMAIN ),
        'Core'
      ),
      self::USER_EMAIL        => array(
        __( 'User email', WPDK_TEXTDOMAIN ),
        'Core'
      ),
    );

    return apply_filters( 'wpdk_mail_placeholders', $placeholders );
  }

}