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edit.php
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edit.php
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<?php
/**
*
* Edit page, brings up the xerte editor window
*
* @author Patrick Lockley
* @version 1.0
* @copyright Copyright (c) 2008,2009 University of Nottingham
* @package
*/
require_once(dirname(__FILE__) . "/config.php");
require $xerte_toolkits_site->php_library_path . "screen_size_library.php";
require $xerte_toolkits_site->php_library_path . "template_status.php";
require $xerte_toolkits_site->php_library_path . "display_library.php";
require $xerte_toolkits_site->php_library_path . "user_library.php";
/**
* Function update_access_time
* This function updates the time a template was last edited
* @param array $row_edit = an array returned from a mysql query
* @return bool True or False if two params match
* @version 1.0
* @author Patrick Lockley
*/
function update_access_time($row_edit){
global $xerte_toolkits_site;
return db_query("UPDATE {$xerte_toolkits_site->database_table_prefix}templatedetails SET date_accessed=? WHERE template_id = ?", array(date('Y-m-d'), $row_edit['template_id']));
}
/*
* Check the template ID is numeric
*/
if(!isset($_GET['template_id']) || !is_numeric($_GET['template_id'])) {
_debug("Template id is not numeric. ->" . $_GET['template_id']);
require $xerte_toolkits_site->root_file_path . "modules/" . $row_edit['template_framework'] . "/edit.php";
dont_show_template();
exit(0);
}
/*
* Find out if this user has rights to the template
*/
$safe_template_id = (int) $_GET['template_id'];
$query_for_edit_content_strip = str_replace("\" . \$xerte_toolkits_site->database_table_prefix . \"", $xerte_toolkits_site->database_table_prefix, $xerte_toolkits_site->play_edit_preview_query);
$query_for_edit_content = str_replace("TEMPLATE_ID_TO_REPLACE", $safe_template_id, $query_for_edit_content_strip);
$row_edit = db_query_one($query_for_edit_content);
if(empty($row_edit)) {
die("Invalid template_id (could not find in DB)");
}
if(isset($_SESSION['toolkits_logon_id'])){
if(has_rights_to_this_template($safe_template_id,$_SESSION['toolkits_logon_id'])){
// Check if user is editor (could be read only)
if(is_user_an_editor($safe_template_id,$_SESSION['toolkits_logon_id'])){
// Check for multiple editors
if(has_template_multiple_editors($safe_template_id)){
// Check for lock file. A lock file is created to prevent more than one
if(file_exists($xerte_toolkits_site->users_file_area_full . $row_edit['template_id'] . "-" . $row_edit['username'] . "-" . $row_edit['template_name'] . "/lockfile.txt")){
// Lock file exists, so open it up and see who created it
$lock_file_data = file_get_contents($xerte_toolkits_site->users_file_area_full . $row_edit['template_id'] . "-" . $row_edit['username'] . "-" . $row_edit['template_name'] . "/lockfile.txt");
$temp = explode("*",$lock_file_data);
if(count($temp)==1){
$temp = explode(" ",$lock_file_data);
}
$lock_file_creator = $temp[0];
/*
* Check if lock file creator is current user, if so, continue into the code
*/
if($lock_file_creator==$_SESSION['toolkits_logon_username']) {
if(update_access_time($row_edit)) {
// Display the editor
require $xerte_toolkits_site->root_file_path . "modules/" . $row_edit['template_framework'] . "/edit.php";
output_editor_code($row_edit, $xerte_toolkits_site, "true", true);
}
else {
// show error
error_show_template();
exit(0);
}
}
else {
if(isset($_POST['lockfile_clear'])) {
/*
* Delete the lockfile
*/
$file_handle = fopen($xerte_toolkits_site->users_file_area_full . $row_edit['template_id'] . "-" . $row_edit['username'] . "-" . $row_edit['template_name'] . "/lockfile.txt", 'w');
fwrite($file_handle, $_SESSION['toolkits_logon_username'] . "*");
fclose($file_handle);
/*
* Update the time this template was last edited
*/
if(update_access_time($row_edit)){
require $xerte_toolkits_site->root_file_path . "modules/" . $row_edit['template_framework'] . "/edit.php";
output_editor_code($row_edit, $xerte_toolkits_site, "true", true);
}
else {
error_show_template();
exit(0);
}
}
else {
// Update the lock file. The lock file format is creator id*id that tried to access 1 <space> id that tried to access 2 and so on
$new_lock_file = $lock_file_data . $_SESSION['toolkits_logon_username'] . " ";
$file_handle = fopen($xerte_toolkits_site->users_file_area_full . $row_edit['template_id'] . "-" . $row_edit['username'] . "-" . $row_edit['template_name'] . "/lockfile.txt",'w');
fwrite($file_handle, $new_lock_file);
fclose($file_handle);
output_locked_file_code($lock_file_creator);
}
}
}
else {
// No lock file, so create one
$file_handle = fopen($xerte_toolkits_site->users_file_area_full . $row_edit['template_id'] . "-" . $row_edit['username'] . "-" . $row_edit['template_name'] . "/lockfile.txt", 'w');
fwrite($file_handle, $_SESSION['toolkits_logon_username'] . "*");
fclose($file_handle);
// Update the time this template was last edited
if(update_access_time($row_edit)){
require $xerte_toolkits_site->root_file_path . "modules/" . $row_edit['template_framework'] . "/edit.php";
output_editor_code($row_edit, $xerte_toolkits_site, "true", true);
}else{
error_show_template();
exit(0);
}
}
}
else {
// One editor (but shared) for this prohect, so continue without creating a lock file
if(update_access_time($row_edit)){
require $xerte_toolkits_site->root_file_path . "modules/" . $row_edit['template_framework'] . "/edit.php";
output_editor_code($row_edit, $xerte_toolkits_site, "true", false);
}
else {
error_show_template();
exit(0);
}
}
}
else {
// One editor (and no sharing) for this prohect, so continue without creating a lock file
if(update_access_time($row_edit)){
_debug("editphp - no sharing etc");
require $xerte_toolkits_site->root_file_path . "modules/" . $row_edit['template_framework'] . "/edit.php";
output_editor_code($row_edit, $xerte_toolkits_site, "false", false);
}
else {
error_show_template();
exit(0);
}
}
}
else if(is_user_admin()) {
// Is the current user an administrator - If so access here.
require $xerte_toolkits_site->root_file_path . "modules/" . $row_edit['template_framework'] . "/edit.php";
output_editor_code($row_edit, $xerte_toolkits_site, "false", false);
}
else {
// Wiki mode - check to see if template allows anonymous editing.
$string_for_flash_xml = $xerte_toolkits_site->users_file_area_short . $row_edit['template_id'] . "-" . $row_edit['username'] . "-" . $row_edit['template_name'] . "/data.xml";
$buffer = file_get_contents($string_for_flash_xml);
if(strpos($buffer,"editable=true")==false){
// so the user sees a blank page?
}else{
// Wiki mode set
require $xerte_toolkits_site->root_file_path . "modules/" . $row_edit['template_framework'] . "/edit.php";
output_editor_code($row_edit, $xerte_toolkits_site, "true", false);
}
}
}else{
die("Session ID not set");
}