Logger.php

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<?php
class Dataface_Logger {
        private $items = array();
        private $format='html';
        
        public function setFormat($format){
                $this->format = $format;
        }
        public function log($str, $level=0){
                $this->items[] = array('message'=>$str, 'level'=>$level);
        }
        public function clear(){
                $this->items = array();
        }
        
        public function items($level=0){
                $out = array();
                foreach ($this->items as $i){
                        if ( $i['level'] >= $level ) $out[] = $i;
                }
                return $out;
        }
        
        public function dump($level=0, $separator = "\n"){
                $messages = array();
                foreach ($this->items($level) as $i){
                        $messages[] = $i['message'];
                }
                if ( $this->format == 'html' ){
                        $messages = array_map('htmlspecialchars', $messages);
                }
                
                echo implode($separator, $messages);
        }
        
}