<?

	/* 
	 * Controll of log files
	 * 
	 * Wbarbaresco - Out/2003
	 * 
	 * Example:
	 * $logs_errors = new wsy_log( "FILE" );
	 * $logs_errors->length = 10;
	 * $logs_errors->incluir( "MESSAGE" );
	 * 
	 */

class wsy_log{
	# Name of file 
	var $file		= "";
	
	# Message error
	var $error			= "";
	
	# If opened
	var $opened 		= false;
	
	# If loaded
	var $loaded 		= false;
	
	# If wrote
	var $wrote 		= false;
	
	# Array of logs
	var $data			= array();
	
	# Delimiter
	var $delimiter		= "<WSY>";
	
	# Number of registers in the log
	var $length		= 10;
	
	// Load registers
	function load(){
		if ( !$this->opened ) { return false; }
		$conteudo = @file_get_contents( $this->file );
		
		$this->data = explode( $this->delimiter, $conteudo );
		
		$nreg = count( $this->data );
		$keys = array_keys($this->data);
		for ( $x = 0; $x < $nreg; $x++ ) {
			if ( trim($this->data[ $keys[$x] ]) == "" ) {
				unset( $this->data[ $keys[$x] ] );
				continue;
			}
			$this->data[ $keys[$x] ] = trim( $this->data[ $keys[$x] ] );
		}
		$this->loaded = true;
		return true;
	}
	
	// Show data
	function details(){
		echo "<pre>";
		$nreg = count( $this->data );
		$keys = array_keys($this->data);
		for ( $x = 0; $x < $nreg; $x++ ) { 
			echo "$x : ".$this->data[ $keys[$x] ]."\n";
		}
		echo "</pre>";
	}
	
	// Write data in the file
	function write(){
		if ( !$this->loaded ) { return false; }
		$str = "";
		$nreg = count( $this->data );
		$keys = array_keys($this->data);
		for ( $x = 0; $x < $nreg; $x++ ) { 
			if ( $this->data[ $keys[$x] ] != "" ) {
				$str .= $this->data[ $keys[$x] ]."\n{$this->delimiter}\n";
			}
		}
		$f = @fopen( $this->file, "w" );
		if ( !$f ) {
			$this->error = "Denied permission"; 
			$this->wrote = false;
			return false;
		}
		$this->wrote = true;
		@fwrite( $f, $str );
		@fclose($f);
	}
	
	// Insert new register
	function insert( $str = "" ){
		$this->load();
		if ( !$this->loaded ) { return false; }
		array_push( $this->data, date( "d/m/y H:i:s" )."\n".$str );
		$this->delimiter_data();
		$this->write();
	}
	
	// Delimiter of data
	function delimiter_data(){
		if ( $this->length > 0 ) {
			$nreg = count( $this->data );
			while( $nreg > $this->length ){
				array_shift( $this->data );
				$nreg--;
			}
		}
	}

	// Constructor
	function wsy_log( $file ){
		if ( !file_exists($file) ) { 
			$this->error 	= "File not Found. File: '$file'."; 
			$this->loaded = false;
			$this->opened 	= false;
			return false;
		}
		$this->file 	= $file;
		$this->opened	= true;
	}
}

?>