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<?php
namespace Ably;
/**
* Ably logger, this is a static class
*/
class Log {
const NONE = 0;
const ERROR = 1;
const WARNING = 2;
const DEBUG = 3;
const VERBOSE = 4;
protected static $logLevel;
protected static $logCallback;
private function __construct() {
// this is a static class!
}
/**
* @return integer currently set log level
*/
public static function getLogLevel() {
return self::$logLevel;
}
/**
* Sets the log level
* @param integer $loglevel one of the log level constants, e.g. Log::DEBUG
*/
public static function setLogLevel( $logLevel ) {
self::$logLevel = $logLevel;
}
/**
* Sets a custom logging function that will be called in place of self::log()
* @param function|null $function Custom function or leave empty to revert to default
*/
public static function setLogCallback( $function = null ) {
self::$logCallback = $function;
}
/**
* Log verbose level information.
* @param mixed ... Any number of variables or messages to log
*/
public static function v(/*...*/) {
self::log( Log::VERBOSE, func_get_args() );
}
/**
* Log debug level information.
* @param mixed ... Any number of variables or messages to log
*/
public static function d(/*...*/) {
self::log( Log::DEBUG, func_get_args() );
}
/**
* Log warning level information.
* @param mixed ... Any number of variables or messages to log
*/
public static function w(/*...*/) {
self::log( Log::WARNING, func_get_args() );
}
/**
* Log error level information.
* @param mixed ... Any number of variables or messages to log
*/
public static function e(/*...*/) {
self::log( Log::ERROR, func_get_args() );
}
/**
* Logs provided message if log level matches requested level.
* Calls either built-in function or a custom callback if provided
* @param integer $level Log level
* @param array $args arguments to dump
*/
public static function log( $level, $args ) {
if ( self::$logLevel >= $level ) {
$function = self::$logCallback;
return $function ? $function( $level, $args ) : self::defaultLogCallback( $level, $args );
}
}
/**
* The default logging function
*/
private static function defaultLogCallback( $level, $args ) {
$last = count($args) - 1;
$timestamp = date( "Y-m-d H:i:s\t" );
foreach ($args as $i => $arg) {
if (is_string($arg)) {
file_put_contents( 'php://stdout', $timestamp . $arg . ($i == $last ? "\n" : "\t") );
}
else if (is_bool($arg)) {
file_put_contents( 'php://stdout', $timestamp . ($arg ? 'true' : 'false') . ($i == $last ? "\n" : "\t") );
}
else if (is_scalar($arg)) {
file_put_contents( 'php://stdout', $timestamp . $arg . ($i == $last ? "\n" : "\t") );
}
else {
file_put_contents( 'php://stdout', $timestamp . print_r( $arg, true ). "\n" );
}
}
}
}