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434 lines
16 KiB
434 lines
16 KiB
<?php //$id: $
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/* For licensing terms, see /chamilo_license.txt */
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/**
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==============================================================================
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* This file contains functions used by the install and upgrade scripts.
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* The current functions are used to
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* - fill existing tables with data;
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* - write a .htaccess file in the courses folder for extra security;
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* - write the system config file containing important settings like database names
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* and paswords and other options.
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*
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* Ideas for future additions:
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* - a function get_old_version_settings to retrieve the config file settings
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* of older versions before upgrading.
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==============================================================================
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*/
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/*
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==============================================================================
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CONSTANTS
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==============================================================================
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*/
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define("DOKEOS_MAIN_DATABASE_FILE", "dokeos_main.sql");
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define("COUNTRY_DATA_FILENAME", "country_data.csv");
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define("COURSES_HTACCESS_FILENAME", "htaccess.dist");
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define("DOKEOS_CONFIG_FILENAME", "configuration.dist.php");
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require_once api_get_path(LIBRARY_PATH).'database.lib.php';
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/*
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==============================================================================
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DATABASE FUNCTIONS
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==============================================================================
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*/
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/**
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* We assume this function is called from install scripts that reside inside
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* the install folder.
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*/
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function set_file_folder_permissions() {
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@chmod('.', 0755); //set permissions on install dir
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@chmod('..', 0755); //set permissions on parent dir of install dir
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@chmod('country_data.csv.csv', 0755);
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}
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/**
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* Fills the countries table with a list of countries.
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*/
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function fill_track_countries_table($track_countries_table) {
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$file_path = dirname(__FILE__).'/'.COUNTRY_DATA_FILENAME;
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$add_country_sql = "LOAD DATA INFILE '".mysql_real_escape_string($file_path)."' INTO TABLE $track_countries_table FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '\'';";
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@ mysql_query($add_country_sql);
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}
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/**
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* Add's a .htaccess file to the courses directory
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* @param string $url_append The path from your webroot to your chamilo root
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*/
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function write_courses_htaccess_file($url_append) {
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$file_path = dirname(__FILE__).'/'.COURSES_HTACCESS_FILENAME;
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$content = file_get_contents($file_path);
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$content = str_replace('{DOKEOS_URL_APPEND_PATH}', $url_append, $content);
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$fp = @ fopen('../../courses/.htaccess', 'w');
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if ($fp) {
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fwrite($fp, $content);
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return fclose($fp);
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}
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return false;
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}
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/**
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* Write the main system config file
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* @param string $path Path to the config file
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*/
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function write_dokeos_config_file($path) {
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global $dbHostForm;
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global $dbUsernameForm;
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global $dbPassForm;
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global $enableTrackingForm;
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global $singleDbForm;
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global $dbPrefixForm;
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global $dbNameForm;
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global $dbStatsForm;
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global $dbScormForm;
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global $dbUserForm;
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global $urlForm;
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global $pathForm;
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global $urlAppendPath;
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global $languageForm;
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global $encryptPassForm;
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global $installType;
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global $updatePath;
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global $session_lifetime;
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global $new_version;
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global $new_version_stable;
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$seek = array('\\', '//');
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$destroy = array('/', '/');
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$rootSys = str_replace($seek, $destroy, realpath($pathForm).'/');
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$file_path = dirname(__FILE__).'/'.DOKEOS_CONFIG_FILENAME;
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$content = file_get_contents($file_path);
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$config['{DATE_GENERATED}'] = date('r');
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$config['{DATABASE_HOST}'] = $dbHostForm;
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$config['{DATABASE_USER}'] = $dbUsernameForm;
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$config['{DATABASE_PASSWORD}'] = $dbPassForm;
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$config['TRACKING_ENABLED'] = trueFalse($enableTrackingForm);
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$config['SINGLE_DATABASE'] = trueFalse($singleDbForm);
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$config['{COURSE_TABLE_PREFIX}'] = ($singleDbForm ? 'crs_' : '');
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$config['{DATABASE_GLUE}'] = ($singleDbForm ? '_' : '`.`');
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$config['{DATABASE_PREFIX}'] = $dbPrefixForm;
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$config['{DATABASE_MAIN}'] = $dbNameForm;
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$config['{DATABASE_STATS}'] = (($singleDbForm && empty($dbStatsForm)) ? $dbNameForm : $dbStatsForm);
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$config['{DATABASE_SCORM}'] = (($singleDbForm && empty($dbScormForm)) ? $dbNameForm : $dbScormForm);
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$config['{DATABASE_PERSONAL}'] =(($singleDbForm && empty($dbUserForm)) ? $dbNameForm : $dbUserForm);
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$config['{ROOT_WEB}'] = $urlForm;
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$config['{ROOT_SYS}'] = str_replace('\\', '/', $rootSys);
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$config['{URL_APPEND_PATH}'] = $urlAppendPath;
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$config['{PLATFORM_LANGUAGE}'] = $languageForm;
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$config['{SECURITY_KEY}'] = md5(uniqid(rand().time()));
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$config['{ENCRYPT_PASSWORD}'] = $encryptPassForm;
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$config['SESSION_LIFETIME'] = $session_lifetime;
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$config['{NEW_VERSION}'] = $new_version;
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$config['NEW_VERSION_STABLE'] = trueFalse($new_version_stable);
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foreach ($config as $key => $value) {
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$content = str_replace($key, $value, $content);
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}
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$fp = @ fopen($path, 'w');
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if (!$fp) {
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echo '<strong><font color="red">Your script doesn\'t have write access to the config directory</font></strong><br />
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<em>('.str_replace('\\', '/', realpath($path)).')</em><br /><br />
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You probably do not have write access on Chamilo root directory,
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i.e. you should <em>CHMOD 777</em> or <em>755</em> or <em>775</em>.<br /><br />
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Your problems can be related on two possible causes:<br />
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<ul>
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<li>Permission problems.<br />Try initially with <em>chmod -R 777</em> and increase restrictions gradually.</li>
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<li>PHP is running in <a href="http://www.php.net/manual/en/features.safe-mode.php" target="_blank">Safe-Mode</a>. If possible, try to switch it off.</li>
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</ul>
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<a href="http://forum.chamilo.org/" target="_blank">Read about this problem in Support Forum</a><br /><br />
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Please go back to step 5.
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<p><input type="submit" name="step5" value="< Back" /></p>
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</td></tr></table></form></body></html>';
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exit ();
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}
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fwrite($fp, $content);
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fclose($fp);
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}
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/**
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* Creates the structure of the main database and fills it
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* with data. Placeholder symbols in the main database file
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* have to be replaced by the settings entered by the user during installation.
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*
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* @param array $installation_settings list of settings entered by the user
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* @param string optional path about the script for database
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* @return void
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*/
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function load_main_database($installation_settings, $db_script = '') {
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if (!empty($db_script)) {
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$dokeos_main_sql_file_string = file_get_contents($db_script);
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} else {
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$dokeos_main_sql_file_string = file_get_contents(DOKEOS_MAIN_DATABASE_FILE);
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}
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//replace symbolic parameters with user-specified values
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foreach ($installation_settings as $key => $value) {
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$dokeos_main_sql_file_string = str_replace($key, mysql_real_escape_string($value), $dokeos_main_sql_file_string);
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}
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//split in array of sql strings
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$sql_instructions = array();
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$success = split_sql_file($sql_instructions, $dokeos_main_sql_file_string);
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//execute the sql instructions
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$count = count($sql_instructions);
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for ($i = 0; $i < $count; $i++) {
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$this_sql_query = $sql_instructions[$i]['query'];
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mysql_query($this_sql_query);
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}
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}
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/**
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* Creates the structure of the stats database
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* @param string Name of the file containing the SQL script inside the install directory
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*/
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function load_database_script($db_script) {
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$dokeos_sql_file_string = file_get_contents($db_script);
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//split in array of sql strings
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$sql_instructions = array();
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$success = split_sql_file($sql_instructions, $dokeos_sql_file_string);
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//execute the sql instructions
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$count = count($sql_instructions);
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for ($i = 0; $i < $count; $i++) {
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$this_sql_query = $sql_instructions[$i]['query'];
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mysql_query($this_sql_query);
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}
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}
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/**
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* Function copied and adapted from phpMyAdmin 2.6.0 PMA_splitSqlFile (also GNU GPL)
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*
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* Removes comment lines and splits up large sql files into individual queries
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*
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* Last revision: September 23, 2001 - gandon
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*
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* @param array the splitted sql commands
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* @param string the sql commands
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* @param integer the MySQL release number (because certains php3 versions
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* can't get the value of a constant from within a function)
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*
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* @return boolean always true
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*
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* @access public
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*/
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function split_sql_file(&$ret, $sql) {
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// do not trim, see bug #1030644
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//$sql = trim($sql);
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$sql = rtrim($sql, "\n\r");
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$sql_len = strlen($sql);
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$char = '';
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$string_start = '';
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$in_string = FALSE;
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$nothing = TRUE;
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$time0 = time();
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for ($i = 0; $i < $sql_len; ++$i) {
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$char = $sql[$i];
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// We are in a string, check for not escaped end of strings except for
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// backquotes that can't be escaped
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if ($in_string) {
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for (;;) {
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$i = strpos($sql, $string_start, $i);
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// No end of string found -> add the current substring to the
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// returned array
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if (!$i) {
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$ret[] = $sql;
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return TRUE;
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}
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// Backquotes or no backslashes before quotes: it's indeed the
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// end of the string -> exit the loop
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else if ($string_start == '`' || $sql[$i-1] != '\\') {
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$string_start = '';
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$in_string = FALSE;
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break;
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}
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// one or more Backslashes before the presumed end of string...
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else {
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// ... first checks for escaped backslashes
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$j = 2;
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$escaped_backslash = FALSE;
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while ($i-$j > 0 && $sql[$i-$j] == '\\') {
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$escaped_backslash = !$escaped_backslash;
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$j++;
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}
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// ... if escaped backslashes: it's really the end of the
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// string -> exit the loop
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if ($escaped_backslash) {
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$string_start = '';
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$in_string = FALSE;
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break;
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}
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// ... else loop
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else {
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$i++;
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}
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} // end if...elseif...else
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} // end for
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} // end if (in string)
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// lets skip comments (/*, -- and #)
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else if (($char == '-' && $sql_len > $i + 2 && $sql[$i + 1] == '-' && $sql[$i + 2] <= ' ') || $char == '#' || ($char == '/' && $sql_len > $i + 1 && $sql[$i + 1] == '*')) {
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$i = strpos($sql, $char == '/' ? '*/' : "\n", $i);
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// didn't we hit end of string?
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if ($i === FALSE) {
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break;
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}
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if ($char == '/') $i++;
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}
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// We are not in a string, first check for delimiter...
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else if ($char == ';') {
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// if delimiter found, add the parsed part to the returned array
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$ret[] = array('query' => substr($sql, 0, $i), 'empty' => $nothing);
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$nothing = TRUE;
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$sql = ltrim(substr($sql, min($i + 1, $sql_len)));
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$sql_len = strlen($sql);
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if ($sql_len) {
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$i = -1;
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} else {
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// The submited statement(s) end(s) here
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return TRUE;
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}
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} // end else if (is delimiter)
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// ... then check for start of a string,...
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else if (($char == '"') || ($char == '\'') || ($char == '`')) {
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$in_string = TRUE;
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$nothing = FALSE;
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$string_start = $char;
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} // end else if (is start of string)
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elseif ($nothing) {
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$nothing = FALSE;
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}
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// loic1: send a fake header each 30 sec. to bypass browser timeout
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$time1 = time();
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if ($time1 >= $time0 + 30) {
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$time0 = $time1;
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header('X-pmaPing: Pong');
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} // end if
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} // end for
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// add any rest to the returned array
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if (!empty($sql) && preg_match('@[^[:space:]]+@', $sql)) {
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$ret[] = array('query' => $sql, 'empty' => $nothing);
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}
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return TRUE;
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} // end of the 'PMA_splitSqlFile()' function
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/**
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* Get an SQL file's contents
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*
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* This function bases its parsing on the pre-set format of the specific SQL files in
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* the install/upgrade procedure:
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* Lines starting with "--" are comments (but need to be taken into account as they also hold sections names)
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* Other lines are considered to be one-line-per-query lines (this is checked quickly by this function)
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* @param string File to parse (in the current directory)
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* @param string Section to return
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* @param boolean Print (true) or hide (false) error texts when they occur
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*/
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function get_sql_file_contents($file, $section, $print_errors = true) {
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//check given parameters
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if (empty($file)) {
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$error = "Missing name of file to parse in get_sql_file_contents()";
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if ($print_errors) echo $error;
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return false;
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}
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if (!in_array($section, array('main', 'user', 'stats', 'scorm', 'course'))) {
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$error = "Section '$section' is not authorized in get_sql_file_contents()";
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if($print_errors) echo $error;
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return false;
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}
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$filepath = getcwd().'/'.$file;
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if (!is_file($filepath) or !is_readable($filepath)) {
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$error = "File $filepath not found or not readable in get_sql_file_contents()";
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if($print_errors) echo $error;
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return false;
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}
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//read the file in an array
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$file_contents = file($filepath);
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if (!is_array($file_contents) or count($file_contents) < 1) {
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$error = "File $filepath looks empty in get_sql_file_contents()";
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if($print_errors) echo $error;
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return false;
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}
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//prepare the resulting array
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$section_contents = array();
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$record = false;
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foreach ($file_contents as $index => $line) {
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if (substr($line, 0, 2) == '--') {
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//This is a comment. Check if section name, otherwise ignore
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$result = array();
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if (preg_match('/^-- xx([A-Z]*)xx/', $line,$result)) { //we got a section name here
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if ($result[1] == strtoupper($section)) {
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//we have the section we are looking for, start recording
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$record = true;
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} else {
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//we have another section's header. If we were recording, stop now and exit loop
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if ($record == true) {
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break;
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}
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$record = false;
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}
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}
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} else {
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if ($record == true) {
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if (!empty($line)) {
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$section_contents[] = $line;
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}
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}
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}
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}
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//now we have our section's SQL statements group ready, return
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return $section_contents;
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}
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function my_directory_to_array($directory) {
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$array_items = array();
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if ($handle = opendir($directory)) {
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while (false !== ($file = readdir($handle))) {
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if ($file != "." && $file != "..") {
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if (is_dir($directory. "/" . $file)) {
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$array_items = array_merge($array_items, my_directory_to_array($directory. '/' . $file));
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$file = $directory . "/" . $file;
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$array_items[] = preg_replace("/\/\//si", '/', $file);
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}
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}
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}
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closedir($handle);
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}
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return $array_items;
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}
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/**
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* Adds a new document to the database - specific to version 1.8.0
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*
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* @param array $_course
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* @param string $path
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* @param string $filetype
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* @param int $filesize
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* @param string $title
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* @return id if inserted document
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*/
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function add_document_180($_course, $path, $filetype, $filesize, $title, $comment = null) {
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$table_document = Database::get_course_table(TABLE_DOCUMENT, $_course['dbName']);
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$sql = "INSERT INTO $table_document
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(`path`,`filetype`,`size`,`title`, `comment`)
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VALUES ('$path','$filetype','$filesize','".
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Database::escape_string($title)."', '$comment')";
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if (Database::query($sql)) {
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//display_message("Added to database (id ".mysql_insert_id().")!");
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return mysql_insert_id();
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} else {
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//display_error("The uploaded file could not be added to the database (".mysql_error().")!");
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return false;
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}
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}
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