<?php
/**
* Class used to simulate basic directory operations.
*
* @author Marius Zadara <marius@zadara.org>
* @copyright (C) Marius Zadara <marius@zadara.org>
* @final
*/
final class MyDirectory
{
/**
* Absolute path to directory
* @var string
*/
private $path;
/**
* Constructor of the class - used to set the path of the directory
* If the path (absolute) is not specified, then the default path (current) is used
*
* @param string $path The absolute path of the directory
* @return Directory
*/
public function MyDirectory($path = ".")
{
// set the class member
$this->path = $path;
}
/**
* This function is used to validate the current directory
*
* @throws DirectoryException
* @return TRUE In case the path is valid
* @return FALSE in case the path is not valid
*/
public function validate($validEmpty = false)
{
// the resource must exists
if (!file_exists($this->path))
throw new DirectoryException(sprintf("The resource '%s' does not exists.", $this->path));
// the resource must be a directory
if (!is_dir($this->path))
throw new DirectoryException(sprintf("The resource '%s' is not a directory.", $this->path));
// the resource must be readable
if (!is_readable($this->path))
throw new DirectoryException(sprintf("The directory '%s' is not readable.", $this->path));
// try to access the directory
$dirHandle = @opendir($this->path);
if (!$dirHandle)
throw new DirectoryException(sprintf("The directory '%s' could not be accessed", $this->path));
// at this point, the directory is valid
// according to the parameter, check the content
// files count
$filesCount = 0;
// read each record from the directory
while (($file = readdir($dirHandle)) !== false)
{
// skip the current directory and parent directory
if (($file == ".") || ($file == ".."))
continue;
// make the file full path
$fileFullPath = $this->path . DIRECTORY_SEPARATOR . $file;
// skip all the non-files
if (filetype($fileFullPath) != "file")
continue;
// skip all the empty files
if (filesize($fileFullPath) == 0)
continue;
// if reached this point, a file has been found
// continue the loop until we have at least 2 files for comparison
$filesCount ++;
// break the loop when more than 2 files
if ($filesCount >= 2)
break;
}
// check the files count
if ($filesCount == 0)
{
@closedir($dirHandle);
throw new DirectoryException(sprintf("The directory '%s' does not contain any valid files.", $this->path));
}
// need at least 2 files for comparison
if ($filesCount < 2)
{
@closedir($dirHandle);
throw new DirectoryException(sprintf("The directory '%s' must have at least 2 files for comparison.", $this->path));
}
// at this point, everything seems ok
// close the directory handle and return true
@closedir($dirHandle);
return true;
}
/**
* Function used to create a directory using the given path
*
* @return boolean TRUE if the directory has been created
* @throws DirectoryException If error occured during creation
*
*/
public function create()
{
// try to create the destination directory
// if not already exists
if (!file_exists($this->path))
{
if (!mkdir($this->path))
throw new DirectoryException(sprintf("The path '%s' could not be created", $this->path));
}
// make sure that the directory has the persmissions
// to write and execute data (everything for the owner, read and execute for the others)
if (!@chmod($this->path, 0777))
throw new DirectoryException(sprintf("Could not set the attributes on the path '%s'.", $this->path));
// everything is ok at this point
return true;
}
/*
* This function is used in order to read the content of the directory
* @throws DirectoryException If the directory could not be opened to read the content
*/
public function getContent()
{
// try to access the directory
$dirHandle = @opendir($this->path);
if (!$dirHandle)
throw new DirectoryException(sprintf("The directory '%s' could not be accessed", $this->path));
// init the files list
$dirFiles = array();
// read each record from the directory
while (($file = readdir($dirHandle)) !== false)
{
// skip the current directory and parent directory
if (($file == ".") || ($file == ".."))
continue;
// make the file fullpath
$fileFullPath = $this->path . DIRECTORY_SEPARATOR . $file;
// skip all the non-files
if (filetype($fileFullPath) != "file")
continue;
// skip all the empty files
if (filesize($fileFullPath) == 0)
continue;
// add the curent file to the list as the full path using the directory path
$dirFiles[] = $this->path . DIRECTORY_SEPARATOR . $file;
}
// check the files list
if (sizeof($dirFiles) == 0)
throw new DirectoryException(sprintf("Could not find any files to add from the directory '%s'.", $this->path));
// return the built list
return $dirFiles;
}
}
?>
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