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   1  <?php
   2  /**
   3   * Gets the email message from the user's mailbox to add as
   4   * a WordPress post. Mailbox connection information must be
   5   * configured under Settings > Writing
   6   *
   7   * @package WordPress
   8   */
   9  
  10  /** Make sure that the WordPress bootstrap has run before continuing. */
  11  require  __DIR__ . '/wp-load.php';
  12  
  13  /** This filter is documented in wp-admin/options.php */
  14  if ( ! apply_filters( 'enable_post_by_email_configuration', true ) ) {
  15      wp_die( __( 'This action has been disabled by the administrator.' ), 403 );
  16  }
  17  
  18  $mailserver_url = get_option( 'mailserver_url' );
  19  
  20  if ( 'mail.example.com' === $mailserver_url || empty( $mailserver_url ) ) {
  21      wp_die( __( 'This action has been disabled by the administrator.' ), 403 );
  22  }
  23  
  24  /**
  25   * Fires to allow a plugin to do a complete takeover of Post by Email.
  26   *
  27   * @since 2.9.0
  28   */
  29  do_action( 'wp-mail.php' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
  30  
  31  /** Get the POP3 class with which to access the mailbox. */
  32  require_once ABSPATH . WPINC . '/class-pop3.php';
  33  
  34  /** Only check at this interval for new messages. */
  35  if ( ! defined( 'WP_MAIL_INTERVAL' ) ) {
  36      define( 'WP_MAIL_INTERVAL', 5 * MINUTE_IN_SECONDS );
  37  }
  38  
  39  $last_checked = get_transient( 'mailserver_last_checked' );
  40  
  41  if ( $last_checked ) {
  42      wp_die( __( 'Slow down cowboy, no need to check for new mails so often!' ) );
  43  }
  44  
  45  set_transient( 'mailserver_last_checked', true, WP_MAIL_INTERVAL );
  46  
  47  $time_difference = get_option( 'gmt_offset' ) * HOUR_IN_SECONDS;
  48  
  49  $phone_delim = '::';
  50  
  51  $pop3 = new POP3();
  52  
  53  if ( ! $pop3->connect( get_option( 'mailserver_url' ), get_option( 'mailserver_port' ) ) || ! $pop3->user( get_option( 'mailserver_login' ) ) ) {
  54      wp_die( esc_html( $pop3->ERROR ) );
  55  }
  56  
  57  $count = $pop3->pass( get_option( 'mailserver_pass' ) );
  58  
  59  if ( false === $count ) {
  60      wp_die( esc_html( $pop3->ERROR ) );
  61  }
  62  
  63  if ( 0 === $count ) {
  64      $pop3->quit();
  65      wp_die( __( 'There doesn&#8217;t seem to be any new mail.' ) );
  66  }
  67  
  68  for ( $i = 1; $i <= $count; $i++ ) {
  69  
  70      $message = $pop3->get( $i );
  71  
  72      $bodysignal                = false;
  73      $boundary                  = '';
  74      $charset                   = '';
  75      $content                   = '';
  76      $content_type              = '';
  77      $content_transfer_encoding = '';
  78      $post_author               = 1;
  79      $author_found              = false;
  80      foreach ( $message as $line ) {
  81          // Body signal.
  82          if ( strlen( $line ) < 3 ) {
  83              $bodysignal = true;
  84          }
  85          if ( $bodysignal ) {
  86              $content .= $line;
  87          } else {
  88              if ( preg_match( '/Content-Type: /i', $line ) ) {
  89                  $content_type = trim( $line );
  90                  $content_type = substr( $content_type, 14, strlen( $content_type ) - 14 );
  91                  $content_type = explode( ';', $content_type );
  92                  if ( ! empty( $content_type[1] ) ) {
  93                      $charset = explode( '=', $content_type[1] );
  94                      $charset = ( ! empty( $charset[1] ) ) ? trim( $charset[1] ) : '';
  95                  }
  96                  $content_type = $content_type[0];
  97              }
  98              if ( preg_match( '/Content-Transfer-Encoding: /i', $line ) ) {
  99                  $content_transfer_encoding = trim( $line );
 100                  $content_transfer_encoding = substr( $content_transfer_encoding, 27, strlen( $content_transfer_encoding ) - 27 );
 101                  $content_transfer_encoding = explode( ';', $content_transfer_encoding );
 102                  $content_transfer_encoding = $content_transfer_encoding[0];
 103              }
 104              if ( ( 'multipart/alternative' === $content_type ) && ( false !== strpos( $line, 'boundary="' ) ) && ( '' === $boundary ) ) {
 105                  $boundary = trim( $line );
 106                  $boundary = explode( '"', $boundary );
 107                  $boundary = $boundary[1];
 108              }
 109              if ( preg_match( '/Subject: /i', $line ) ) {
 110                  $subject = trim( $line );
 111                  $subject = substr( $subject, 9, strlen( $subject ) - 9 );
 112                  // Captures any text in the subject before $phone_delim as the subject.
 113                  if ( function_exists( 'iconv_mime_decode' ) ) {
 114                      $subject = iconv_mime_decode( $subject, 2, get_option( 'blog_charset' ) );
 115                  } else {
 116                      $subject = wp_iso_descrambler( $subject );
 117                  }
 118                  $subject = explode( $phone_delim, $subject );
 119                  $subject = $subject[0];
 120              }
 121  
 122              /*
 123               * Set the author using the email address (From or Reply-To, the last used)
 124               * otherwise use the site admin.
 125               */
 126              if ( ! $author_found && preg_match( '/^(From|Reply-To): /', $line ) ) {
 127                  if ( preg_match( '|[a-z0-9_.-]+@[a-z0-9_.-]+(?!.*<)|i', $line, $matches ) ) {
 128                      $author = $matches[0];
 129                  } else {
 130                      $author = trim( $line );
 131                  }
 132                  $author = sanitize_email( $author );
 133                  if ( is_email( $author ) ) {
 134                      /* translators: %s: Post author email address. */
 135                      echo '<p>' . sprintf( __( 'Author is %s' ), $author ) . '</p>';
 136                      $userdata = get_user_by( 'email', $author );
 137                      if ( ! empty( $userdata ) ) {
 138                          $post_author  = $userdata->ID;
 139                          $author_found = true;
 140                      }
 141                  }
 142              }
 143  
 144              if ( preg_match( '/Date: /i', $line ) ) { // Of the form '20 Mar 2002 20:32:37 +0100'.
 145                  $ddate = str_replace( 'Date: ', '', trim( $line ) );
 146                  // Remove parenthesised timezone string if it exists, as this confuses strtotime().
 147                  $ddate           = preg_replace( '!\s*\(.+\)\s*$!', '', $ddate );
 148                  $ddate_timestamp = strtotime( $ddate );
 149                  $post_date       = gmdate( 'Y-m-d H:i:s', $ddate_timestamp + $time_difference );
 150                  $post_date_gmt   = gmdate( 'Y-m-d H:i:s', $ddate_timestamp );
 151              }
 152          }
 153      }
 154  
 155      // Set $post_status based on $author_found and on author's publish_posts capability.
 156      if ( $author_found ) {
 157          $user        = new WP_User( $post_author );
 158          $post_status = ( $user->has_cap( 'publish_posts' ) ) ? 'publish' : 'pending';
 159      } else {
 160          // Author not found in DB, set status to pending. Author already set to admin.
 161          $post_status = 'pending';
 162      }
 163  
 164      $subject = trim( $subject );
 165  
 166      if ( 'multipart/alternative' === $content_type ) {
 167          $content = explode( '--' . $boundary, $content );
 168          $content = $content[2];
 169  
 170          // Match case-insensitive content-transfer-encoding.
 171          if ( preg_match( '/Content-Transfer-Encoding: quoted-printable/i', $content, $delim ) ) {
 172              $content = explode( $delim[0], $content );
 173              $content = $content[1];
 174          }
 175          $content = strip_tags( $content, '<img><p><br><i><b><u><em><strong><strike><font><span><div>' );
 176      }
 177      $content = trim( $content );
 178  
 179      /**
 180       * Filters the original content of the email.
 181       *
 182       * Give Post-By-Email extending plugins full access to the content, either
 183       * the raw content, or the content of the last quoted-printable section.
 184       *
 185       * @since 2.8.0
 186       *
 187       * @param string $content The original email content.
 188       */
 189      $content = apply_filters( 'wp_mail_original_content', $content );
 190  
 191      if ( false !== stripos( $content_transfer_encoding, 'quoted-printable' ) ) {
 192          $content = quoted_printable_decode( $content );
 193      }
 194  
 195      if ( function_exists( 'iconv' ) && ! empty( $charset ) ) {
 196          $content = iconv( $charset, get_option( 'blog_charset' ), $content );
 197      }
 198  
 199      // Captures any text in the body after $phone_delim as the body.
 200      $content = explode( $phone_delim, $content );
 201      $content = empty( $content[1] ) ? $content[0] : $content[1];
 202  
 203      $content = trim( $content );
 204  
 205      /**
 206       * Filters the content of the post submitted by email before saving.
 207       *
 208       * @since 1.2.0
 209       *
 210       * @param string $content The email content.
 211       */
 212      $post_content = apply_filters( 'phone_content', $content );
 213  
 214      $post_title = xmlrpc_getposttitle( $content );
 215  
 216      if ( '' === $post_title ) {
 217          $post_title = $subject;
 218      }
 219  
 220      $post_category = array( get_option( 'default_email_category' ) );
 221  
 222      $post_data = compact( 'post_content', 'post_title', 'post_date', 'post_date_gmt', 'post_author', 'post_category', 'post_status' );
 223      $post_data = wp_slash( $post_data );
 224  
 225      $post_ID = wp_insert_post( $post_data );
 226      if ( is_wp_error( $post_ID ) ) {
 227          echo "\n" . $post_ID->get_error_message();
 228      }
 229  
 230      // We couldn't post, for whatever reason. Better move forward to the next email.
 231      if ( empty( $post_ID ) ) {
 232          continue;
 233      }
 234  
 235      /**
 236       * Fires after a post submitted by email is published.
 237       *
 238       * @since 1.2.0
 239       *
 240       * @param int $post_ID The post ID.
 241       */
 242      do_action( 'publish_phone', $post_ID );
 243  
 244      echo "\n<p><strong>" . __( 'Author:' ) . '</strong> ' . esc_html( $post_author ) . '</p>';
 245      echo "\n<p><strong>" . __( 'Posted title:' ) . '</strong> ' . esc_html( $post_title ) . '</p>';
 246  
 247      if ( ! $pop3->delete( $i ) ) {
 248          echo '<p>' . sprintf(
 249              /* translators: %s: POP3 error. */
 250              __( 'Oops: %s' ),
 251              esc_html( $pop3->ERROR )
 252          ) . '</p>';
 253          $pop3->reset();
 254          exit;
 255      } else {
 256          echo '<p>' . sprintf(
 257              /* translators: %s: The message ID. */
 258              __( 'Mission complete. Message %s deleted.' ),
 259              '<strong>' . $i . '</strong>'
 260          ) . '</p>';
 261      }
 262  }
 263  
 264  $pop3->quit();