/gviewer.php

<?php 
 
/** 
Plugin Name: Google Doc Embedder 
Plugin URI: https://wordpress.org/plugins/google-document-embedder/ 
Description: Lets you embed PDF, MS Office, TIFF, and many other file types in a web page using the Google Docs Viewer (no Flash or PDF browser plug-ins required). 
Author: Kevin Davis, Dan Lester 
Author URI: https://wordpress.org/plugins/google-document-embedder/ 
Text Domain: google-document-embedder 
Domain Path: /languages/ 
Version: 2.6.2 
License: GPLv2 
*/ 
 
/** 
 * LICENSE 
 * This file is part of Google Doc Embedder. 
 * 
 * Google Doc Embedder is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License 
 * as published by the Free Software Foundation; either version 2 
 * of the License, or (at your option) any later version. 
 * 
 * This program is distributed in the hope that it will be useful,  
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 * GNU General Public License for more details. 
 * 
 * You should have received a copy of the GNU General Public License 
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA. 
 * 
 * @package    google-document-embedder 
 * @author     Kevin Davis <wpp@tnw.org> 
 * @copyright  Copyright 2014 Kevin Davis 
 * @license    http://www.gnu.org/licenses/gpl.txt GPL 2.0 
 * @link       https://wordpress.org/plugins/google-document-embedder/ 
 */ 
 
// boring init junk 
$gde_ver = "2.6.2"; 
$gde_db_ver = "1.2";        // update also in gde_activate() 
 
require_once( plugin_dir_path( __FILE__ ) . 'functions.php' ); 
global $wp_version; 
 
$pdata = gde_get_plugin_data(); 
$gdeoptions = get_option( 'gde_options' ); 
$gdetypes = gde_supported_types();         
 
// check for db health 
$healthy = gde_debug_tables(); 
 
// add admin functions only if needed 
if ( is_admin() ) { require_once( GDE_PLUGIN_DIR . 'functions-admin.php' ); } 
 
// get global settings - not implemented in this release 
/** 
if ( is_multisite() ) { 
  $gdeglobals = get_site_option( 'gde_globals' ); 
} 
*/ 
 
// activate plugin, allow clear dx log on deactivate 
register_activation_hook( __FILE__, 'gde_activate' ); 
register_deactivation_hook( __FILE__, 'gde_deactivate' ); 
 
// bring the magic 
add_action( 'plugins_loaded', 'gde_load' ); 
add_shortcode( 'gview', 'gde_do_shortcode' ); 
 
function gde_do_shortcode( $atts ) { 
  global $healthy, $gdeoptions; //$gdeglobals 
   
  // check profile table health 
  if ( ! $healthy ) { 
      delete_option('gde_db_version'); 
      return gde_show_error( __('Unable to load profile settings', 'google-document-embedder') ); 
  } 
   
  // handle global setting overrides - not active in this release 
  /** 
  if ($gdeglobals['enforce_viewer'] == "std") { 
      $gdeoptions['disable_proxy'] = "yes"; 
  } 
  if ($gdeglobals['enforce_lang']) { 
      $gdeoptions['default_lang'] = $gdeglobals['enforce_lang']; 
  } 
  */ 
   
  extract( shortcode_atts( array ( 
      'file' => '',  
      'profile' => 1, // default profile is always ID 1 
      'save' => '',  
      'width' => '',  
      'height' => '',  
      'cache' => '' 
      //'title' => '', // not yet implemented 
      //'page' => '', // support broken in Google Viewer 
 ), $atts ) ); 
   
  // get requested profile data (or default if doesn't exist) 
  $term = $profile; 
  if ( is_numeric( $term ) ) { 
      // id-based lookup 
      if ( ! $profile = gde_get_profiles( $term ) ) { 
          gde_dx_log("Loading default profile instead"); 
          if ( ! $profile = gde_get_profiles( 1 ) ) { 
              return gde_show_error( __('Unable to load requested profile.', 'google-document-embedder') ); 
          } else { 
              $pid = 1; 
          } 
      } else { 
          $pid = $term; 
      } 
  } else { 
      // name-based lookup 
      if ( ! $profile = gde_get_profiles( strtolower( $term ) ) ) { 
          gde_dx_log("Loading default profile instead"); 
          if ( ! $profile = gde_get_profiles( 1 ) ) { 
              return gde_show_error( __('Unable to load requested profile.', 'google-document-embedder') ); 
          } else { 
              $pid = 1; 
          } 
      } else { 
          $pid = $profile['profile_id']; 
      } 
  } 
   
  // use profile defaults if shortcode override not defined 
  if ( $save !== "0" ) { 
      if ( empty( $save ) ) { 
          $save = $profile['link_show']; 
      } 
  } 
  if ( empty( $width ) ) { 
      $width = $profile['default_width']; 
  } 
  if ( empty( $height ) ) { 
      $height = $profile['default_height']; 
  } 
  if ( $cache !== "0" ) { 
      if ( empty( $cache ) ) { 
          $cache = $profile['cache']; 
      } 
  } 
  //if ( $profile['language'] !== "en_US" ) { 
      $lang =  $profile['language']; 
  //} 
   
  // tweak the dimensions if necessary 
  $width = gde_sanitize_dims( $width ); 
  $height = gde_sanitize_dims( $height ); 
   
  // add base url if needed 
  if ( ! preg_match( "/^http/i", $file ) ) { 
      if ( substr( $file, 0, 2 ) == "//" ) { 
          // append dynamic protocol 
          if ( ! empty( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443 ) { 
              $file = "https:" . $file; 
          } else { 
              $file = "http:" . $file; 
          } 
      } elseif ( isset( $profile['base_url'] ) ) { 
          // not a full link, add base URL if available 
          if ( substr( $file, 0, 1 ) == "/" ) { 
              // remove any preceding slash from doc (base URL adds it) 
              $file = ltrim( $file, '/' ); 
          } 
          $file = $profile['base_url'] . $file; 
      } 
  } 
   
  // capture file details 
  $fn = basename( $file ); 
  $fnp = gde_split_filename( $fn ); 
   
  // check for missing required field 
  if ( ! $file ) { 
      return gde_show_error( __('File not specified, check shortcode syntax', 'google-document-embedder') ); 
  } 
   
  // file validation 
  if ( $gdeoptions['error_check'] == "no" ) { 
      $force = true; 
  } else { 
      $force = false; 
  } 
  $status = gde_validate_file( str_replace( " ", "%20", $file ), $force ); 
   
  if ( ! isset( $code ) && ! is_array( $status ) && $status !== -1 ) { 
      // validation failed 
      $code = gde_show_error( $status ); 
  } elseif ( ! isset( $code ) ) { 
      // validation passed or was skipped 
       
      // check for max filesize 
      $viewer = true; 
      if ( $gdeoptions['file_maxsize'] > 0 && isset( $status['fsize'] ) ) { 
          $maxbytes = (int) $gdeoptions['file_maxsize'] * 1024 * 1024; 
          if ( $status['fsize'] > $maxbytes ) { 
              $viewer = false; 
          } 
      } 
       
      // generate links (embed, download) 
      $links = array( $file, $file ); 
      if ( $profile['link_block'] == "yes" && gde_is_blockable( $profile ) ) { 
          if ( $secure = gde_get_secure_url( $file ) ) { 
              $links[0] = $secure; 
          } else { 
              $links[0] = ''; 
          } 
          $links[1] = ''; 
      } elseif ( $profile['link_show'] !== "none" ) { 
          if ( $profile['link_force'] == "yes" && $profile['link_mask'] == "no" ) { 
              $links[1] = GDE_PLUGIN_URL . "load.php?d=" . urlencode( $links[1] ); 
          } elseif ( $profile['link_force'] == "no" && $profile['link_mask'] == "yes" ) { 
              $short = gde_get_short_url( $links[0] ); 
              $links[0] = $short; 
              $links[1] = $short; 
          } elseif ( $profile['link_force'] == "yes" && $profile['link_mask'] == "yes" ) { 
              $short = gde_get_short_url( GDE_PLUGIN_URL . "load.php?d=" . urlencode( $links[0] ) ); 
              $links[0] = $short; 
              $links[1] = $short; 
          } 
      } 
       
      // obfuscate filename if cache disabled (globally or via shortcode) 
      // note that this is ignored if the document is secure to prevent each hit from generating a new db row 
      if ( ! empty( $links[1] ) && ( $cache == "off" || $cache == "0" ) ) { 
          $links[0] .= "?" . time(); 
      } 
       
      // check for failed secure doc 
      if ( empty( $links[0] ) && empty( $links[1] ) ) { 
          $code = gde_show_error( __('Unable to secure document', 'google-document-embedder') ); 
      } else { 
       
          // which viewer? 
          //if ( $profile['viewer'] == "enhanced" ) { 
          //    $lnk = GDE_PLUGIN_URL . "view.php?url=" . urlencode( $links[0] ) . "&hl=" . $lang . "&gpid=" . $pid; 
              // make protocol-agnostic 
          //    $lnk = preg_replace( '/^https?:/i', '', $lnk ); 
          //} else { 
              $lnk = "//docs.google.com/viewer?url=" . urlencode( $links[0] ) . "&hl=" . $lang; 
          //} 
           
          // what mode? 
          //if ( $profile['tb_mobile'] == "always" ) { 
          //    $lnk .= "&mobile=true"; 
          //} else { 
              $lnk .= "&embedded=true"; 
          //} 
           
          // build viewer 
          if ( $viewer == false ) { 
              // exceeds max filesize 
              $vwr = ''; 
          } else { 
              $vwr = '<iframe src="%U%" class="gde-frame" style="width:%W%; height:%H%; border: none;"%ATTRS%></iframe>'; 
              $vwr = str_replace("%U%", $lnk, $vwr); 
              $vwr = str_replace("%W%", $width, $vwr); 
              $vwr = str_replace("%H%", $height, $vwr); 
               
              // frame attributes 
              $vattr[] = ' scrolling="no"';                        // iphone scrolling bug 
              //if ( ! empty( $page ) && is_numeric( $page ) ) {    // selected starting page 
              //    $page = (int) $page - 1; 
              //    $vattr[] = ' onload="javascript:this.contentWindow.location.hash=\':0.page.' . $page . '\';"'; 
              //} 
              $vwr = str_replace( "%ATTRS%", implode( '', $vattr ), $vwr ); 
          } 
           
          // show download link? 
          $allow_save = false; 
          if ( ! empty( $links[1] ) ) {    // link empty = secure document; ignore any other save attribute 
              if ( $save == "all" || $save == "1" ) { 
                  $allow_save = true; 
              } elseif ( $save == "users" && is_user_logged_in() ) { 
                  $allow_save = true; 
              } 
          } 
           
          if ( $allow_save ) { 
              // build download link 
              $linkcode = '<p class="gde-text"><a href="%LINK%" class="gde-link"%ATTRS%>%TXT%</a></p>'; 
              $linkcode = str_replace( "%LINK%", $links[1], $linkcode ); 
               
              // fix type 
              $ftype = strtoupper( $fnp[1] ); 
              if ( $ftype == "TIF" ) {  
                  $ftype = "TIFF"; 
              } 
               
              // link attributes 
              if ( $profile['link_mask'] == "yes" ) { 
                  $attr[] = ' rel="nofollow"'; 
              } 
              $attr[] = gde_ga_event( $file ); // GA integration 
              $linkcode = str_replace("%ATTRS%", implode( '', $attr ), $linkcode); 
               
              // link text 
              if ( empty( $profile['link_text'] ) ) { 
                  $profile['link_text'] = __('Download', 'google-document-embedder'); 
              } 
               
              $dltext = str_replace( "%FILE", $fn, $profile['link_text'] ); 
              $dltext = str_replace( "%TYPE", $ftype, $dltext ); 
              $dltext = str_replace( "%SIZE", gde_format_bytes( $status['fsize'] ), $dltext ); 
               
              $linkcode = str_replace( "%TXT%", $dltext, $linkcode ); 
          } else { 
              $linkcode = ''; 
          } 
           
          // link position 
          if ( $profile['link_pos'] == "above" ) { 
              $code = $linkcode . "\n" . $vwr; 
          } else { 
              $code = $vwr . "\n" . $linkcode; 
          } 
      } 
  } 
   
  return $code; 
} 
 
if ( is_admin() ) { 
  // add quick settings link to plugin list 
  add_filter( "plugin_action_links_" . plugin_basename( __FILE__ ), 'gde_actlinks' ); 
   
  // notify if currently using a beta 
  add_action( 'after_plugin_row', 'gde_warn_on_plugin_page' ); 
   
  // editor integration 
  if ( ! isset( $gdeoptions['ed_disable'] ) || $gdeoptions['ed_disable'] == "no" ) { 
      // add quicktag 
      add_action( 'admin_print_scripts', 'gde_admin_print_scripts' ); 
       
      // add tinymce button 
      add_action( 'admin_init', 'gde_mce_addbuttons' ); 
       
      // extend media upload support to natively unsupported mime types 
      if ( $gdeoptions['ed_extend_upload'] == "yes" ) { 
          add_filter( 'upload_mimes', 'gde_upload_mimes' ); 
      } 
       
      // embed shortcode instead of link from media library for supported types 
      add_filter( 'media_send_to_editor', 'gde_media_insert', 20, 3 ); 
  } 
   
  // add local settings page 
  add_action( 'admin_menu', 'gde_option_page' ); 
   
  //if ( is_multisite() ) { 
      // add global settings page 
      //add_action( 'network_admin_menu', 'gde_site_option_page' );    // not present in this release 
  //} 
} 
 
/** 
 * Activate the plugin 
 * 
 * @since   0.2 
 * @return  void 
 * @note    This function must remain in this file 
 */ 
function gde_activate( $network_wide ) { 
  // check for sufficient php version (minimum supports json_encode) 
  if ( ! ( phpversion() >= '5.2.0' ) ) { 
      wp_die( 'Your server is running PHP version ' . phpversion() . ' but this plugin requires at least 5.2.0' ); 
  } 
   
  // set db schema version for this release - global not available here 
  $gde_db_ver = "1.2"; 
   
  // check for network-wide activation (currently not supported) 
  if ( $network_wide ) { 
      wp_die("Network activation is not supported at this time. Please activate individually until an update is available."); 
  } 
   
  require_once( plugin_dir_path( __FILE__ ) . 'libs/lib-setup.php' ); 
   
  // create/update profile db, if necessary 
  if ( gde_db_tables( $gde_db_ver ) ) { 
      gde_setup(); 
  } else { 
      gde_dx_log("Table creation failed; setup halted"); 
      wp_die( __("Setup wasn't able to create the required database tables.", 'google-document-embedder') ); 
  } 
} 
 
/** 
 * Remove dx log on deactivation 
 * 
 * @since   2.5.2.1 
 * @return  void 
 */ 
function gde_deactivate() { 
  global $wpdb; 
   
  $table = $wpdb->base_prefix . 'gde_dx_log'; 
  if ( is_multisite() ) { 
      $blogid = get_current_blog_id(); 
      $wpdb->query("DELETE FROM $table WHERE blogid = '$blogid'"); 
  } else { 
      $wpdb->query("DROP TABLE IF EXISTS $table"); 
  } 
} 
 
/** 
 * Actions to perform when plugins have finished loading (before init) 
 * 
 * @since   2.5.2.1 
 * @return  void 
 */ 
function gde_load() { 
  // localization 
  load_plugin_textdomain( 'google-document-embedder', false, dirname( plugin_basename( __FILE__ ) ) . '/languages' ); 
} 
 
?>