<?php

/* 
 * Objeto para leer y escribir datos de log de actividades realizadas por el usuario
 */

class ArchivoMaterias {
    //put your code here
    private $file, $usr, $periodo;
    private $dir;
    
    function __construct($usr, $periodo, $filename = ""){
        $this->usr = $usr;
        $this->periodo = $periodo;
        if(trim($filename) == ""){
            $this->file = sha1("file_".$usr.$periodo).".txt";
        }else
            $this->file = $filename;
        
        if(preg_match('/\bapsa_pruebas\b/', $_SERVER['PHP_SELF']) ){
            $ruta = "apsa_pruebas";
        }else
            $ruta = "apsa";
        $this->dir = $_SERVER['DOCUMENT_ROOT']."/".$ruta."/files/";
    }
    
    function getFileName(){
        return $this->file;
    }
    
    function cleanFile(){
        $filename = $this->dir.$this->file;
        
        if (!file_exists($this->dir)){
            mkdir($this->dir, 0755, true);
        }
        if (file_exists($this->dir)){
            file_put_contents($filename, "");
        }
    }
    
    function appendFile($row){
        $filename = $this->dir.$this->file;
        
        if (!file_exists($this->dir)){
            mkdir($this->dir, 0755, true);
        }
        if (file_exists($this->dir)){
            $data = $row."\n";
            file_put_contents($filename, $data, FILE_APPEND);
        }
    }
    function getFile(){
        $filename = $this->dir.$this->file;
        if (file_exists($filename)){
            return file ($filename , FILE_SKIP_EMPTY_LINES);
        }else{
            return array();
        }
    }
}