ampache/lib/debug.lib.php

<?php
/*

 Copyright (c) 2001 - 2007 Ampache.org
 All rights reserved.

 This program 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/


/**
 * Debug Library
 * This library is loaded when somehow our mojo has
 * been lost, it contains functions for checking sql
 * connections, web paths etc..
*/

/**
 * check_database
 *  checks the local mysql db and make sure life is good
 */
function check_database($host,$username,$pass) {
	
	$dbh = @mysql_connect($host, $username, $pass);

	if (!is_resource($dbh)) {
		return false;
	}
	if (!$host || !$username || !$pass) { 
		return false;
	}
	
	return $dbh; 

} // check_database

/**
 * check_database_inserted
 * checks to make sure that you have inserted the database 
 * and that the user you are using has access to it
 */
function check_database_inserted($dbh,$db_name) { 

	$sql = "DESCRIBE session";
	$db_results = Dba::query($sql);

	if (!$db_results) { 
		return false; 
	} 

	// Make sure the whole table is there
	if (Dba::num_rows($db_results) != '6') { 
		return false;
	}

	return true;

} // check_database_inserted

/**
 * check_php_ver
 * checks the php version and makes
 * sure that it's good enough
 */
function check_php_ver($level=0) {

	if (strcmp('5.0.0',phpversion()) > 0) {
		return false;
	}

	return true;

} // check_php_ver

/**
 * check_php_mysql
 * checks for mysql support by looking for the mysql_query function
 */
function check_php_mysql() { 

	if (!function_exists('mysql_query')) { 
		return false;
	}

	return true;

} // check_php_mysql

/**
 * check_php_session
 * checks to make sure the needed functions 
 * for sessions exist
*/
function check_php_session() {

	if (!function_exists('session_set_save_handler')) { 
		return false;
	}

	return true;

} // check_php_session

/**
 * check_php_iconv
 * checks to see if you have iconv installed
 */
function check_php_iconv() { 

	if (!function_exists('iconv')) { 
		return false;
	}

	return true;

} // check_php_iconv

/**
 * check_php_pcre
 * This makes sure they have pcre (preg_???) support
 * compiled into PHP this is required!
 */
function check_php_pcre() { 

	if (!function_exists('preg_match')) { 
		return false;
	}

	return true; 

} // check_php_pcre

/**
 * check_config_values
 * checks to make sure that they have at least set the needed variables
 */
function check_config_values($conf) { 
	
	if (!$conf['database_hostname']) { 
                return false;
        }
        if (!$conf['database_name']) { 
                return false;
        } 
        if (!$conf['database_username']) { 
                return false;
        } 
        if (!$conf['database_password']) { 
                return false;
        }
        if (!$conf['session_length']) { 
                return false;
        }
	if (!$conf['session_name']) { 
		return false;
	}
	if (!isset($conf['session_cookielife'])) { 
		return false;
	}
	if (!isset($conf['session_cookiesecure'])) { 
		return false;
	}
	if (isset($conf['debug'])) {
	    if (!isset($conf['log_path'])) {
		return false;
	    }
	}
	
        return true;

} // check_config_values

/**
 * check_putenv
 * This checks to see if we can manually set the
 * memory limit, and other putenvs we need for 
 * ampache to work correctly 
 */
function check_putenv() { 

	/* Check memory */
	$current = ini_get('memory_limit');
	$current = substr($current_memory,0,strlen($current_memory)-1);
	$new_limit = ($current+1) . "M";
	
	/* Bump it by one meg */
	if (!ini_set(memory_limit,$new_limit)) { 
		return false; 
	}
	
	/* Check if safe mode is on */
	if (ini_get('safe_mode')) { 
		return false; 
	}

	return true;

} // check_putenv

/**
 * generate_config
 * This takes an array of results and re-generates the config file
 * this is used by the installer and by the admin/system page
 */
function generate_config($current) { 

	/* Start building the new config file */
	$distfile = Config::get('prefix') . '/config/ampache.cfg.php.dist';
        $handle = fopen($distfile,'r');
        $dist = fread($handle,filesize($distfile));
        fclose($handle);

        $data = explode("\n",$dist);

        /* Run throught the lines and set our settings */
        foreach ($data as $line) {

	        /* Attempt to pull out Key */
	        if (preg_match("/^;?([\w\d]+)\s+=\s+[\"]{1}(.*?)[\"]{1}$/",$line,$matches)
			|| preg_match("/^;?([\w\d]+)\s+=\s+[\']{1}(.*?)[\']{1}$/", $line, $matches)
	                || preg_match("/^;?([\w\d]+)\s+=\s+[\'\"]{0}(.*)[\'\"]{0}$/",$line,$matches)) {

			$key    = $matches[1];
	        	$value  = $matches[2];

	                /* Put in the current value */
	                if (isset($current[$key]) AND $key != 'config_version') {
	                	$line = $key . ' = "' . $current[$key] . '"';
	                        unset($current[$key]);
			} // if set

	                elseif (isset($array_value[$key])) {
	                	$line = '';
	                }

		} // if key

	        $final .= $line . "\n";

	} // end foreach line

	return $final; 

} // generate_config

?>