mirror of
https://github.com/FH-Complete/FHC-Core.git
synced 2026-06-01 20:29:29 +00:00
KarpAlex
40493936c3
- AkteLib and DmsLib: added comments, added fallback default user for insertvon - FS_Model: added TempFS_model.php for writing temp files, added comments
336 lines
10 KiB
PHP
336 lines
10 KiB
PHP
<?php
|
|
|
|
if (!defined('BASEPATH')) exit('No direct script access allowed');
|
|
|
|
/**
|
|
* Model to work with the filesystem, it represents a directory
|
|
* It could be extended or could be used directly to work on the given path
|
|
*/
|
|
class FS_Model extends CI_Model
|
|
{
|
|
const READ_MODE = 'r';
|
|
const READ_WRITE_MODE = 'w+';
|
|
const READ_APPEND_MODE = 'a+';
|
|
const BLOCK_SIZE = 8192;
|
|
const META_URI = 'uri';
|
|
|
|
private $_path; // Directory where this model can operate
|
|
|
|
/**
|
|
* Set properties
|
|
*/
|
|
public function __construct($path)
|
|
{
|
|
parent::__construct();
|
|
|
|
$this->_path = $path;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------------------------
|
|
// Public methods
|
|
|
|
/**
|
|
* Opens a file in read mode and returns its file handle
|
|
*/
|
|
public function openRead($filename)
|
|
{
|
|
return $this->_open($filename, self::READ_MODE);
|
|
}
|
|
|
|
/**
|
|
* Opens a file in read and write mode and returns its file handle
|
|
* If the file does not exist then it is created
|
|
*/
|
|
public function openReadWrite($filename)
|
|
{
|
|
return $this->_open($filename, self::READ_WRITE_MODE);
|
|
}
|
|
|
|
/**
|
|
* Opens a file in read and append mode and returns its file handle
|
|
* If the file does not exist then it is created
|
|
*/
|
|
public function openReadAppend($filename)
|
|
{
|
|
return $this->_open($filename, self::READ_APPEND_MODE);
|
|
}
|
|
|
|
/**
|
|
* Closes a file handle
|
|
*/
|
|
public function close($fileHandle)
|
|
{
|
|
return fclose($fileHandle) === true ? success() : error('Error while closing the file handler');
|
|
}
|
|
|
|
/**
|
|
* Reads a block of bytes from the given file
|
|
* Returns a success that contains the block
|
|
* On failure returns an error
|
|
*/
|
|
public function readBlock($fileHandle)
|
|
{
|
|
// Reads a block of bytes from the file
|
|
$block = fread($fileHandle, self::BLOCK_SIZE);
|
|
|
|
// If an error occurred
|
|
if ($block === false)
|
|
{
|
|
// Prepare the error message
|
|
$errorMsg = 'An error occurred while reading a file';
|
|
|
|
// Tries to get the file name and to concatenate it to the error message
|
|
$fileMetaData = stream_get_meta_data($fileHandle);
|
|
if (isset($fileMetaData[self::META_URI])) $errorMsg .= ': '.$fileMetaData[self::META_URI];
|
|
|
|
return error($errorMsg); // returns the error
|
|
}
|
|
|
|
return success($block); // return success if everything was fine
|
|
}
|
|
|
|
/**
|
|
* Writes/appends (depending on how the file was opened) a content into a file
|
|
* Returns a success that contains the written number of bytes
|
|
* On failure returns an error
|
|
*/
|
|
public function write($fileHandle, $content)
|
|
{
|
|
// Writes the provided content to the file
|
|
$writeResult = fwrite($fileHandle, $content);
|
|
|
|
// If an error occurred
|
|
if ($writeResult === false)
|
|
{
|
|
$errorMsg = 'An error occurred while writing a file';
|
|
|
|
// Tries to get the file name and to concatenate it to the error message
|
|
$fileMetaData = stream_get_meta_data($fileHandle);
|
|
if (isset($fileMetaData[self::META_URI])) $errorMsg .= ': '.$fileMetaData[self::META_URI];
|
|
|
|
return error($errorMsg); // returns the error
|
|
}
|
|
|
|
return success($writeResult);
|
|
}
|
|
|
|
/**
|
|
* Removes a given file
|
|
*/
|
|
public function remove($filename)
|
|
{
|
|
// Check if the property _path represents a valid directory
|
|
$checkResult = $this->_checkPath();
|
|
|
|
if (isError($checkResult)) return $checkResult; // If not then return the error
|
|
|
|
// Check filename
|
|
if (isEmptyString($filename)) return error('The given filename is not valid');
|
|
|
|
// remove file
|
|
if (unlink($this->_path.DIRECTORY_SEPARATOR.$filename) === true)
|
|
{
|
|
return success();
|
|
}
|
|
else
|
|
{
|
|
return error('An error occurred while removing a file');
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------------------------
|
|
// Old public methods that work with the base64 encoding, not to be used!
|
|
|
|
/**
|
|
* Read data from the given file and encode its content to base64
|
|
*/
|
|
public function readBase64($filename)
|
|
{
|
|
// Open the file in read mode
|
|
$openReadResult = $this->openRead($filename);
|
|
if (isError($openReadResult)) return $openReadResult; // if an error occurred then return it
|
|
|
|
$fileContent = ''; // to store the file content
|
|
$fileHandle = getData($openReadResult); // get the file handle
|
|
|
|
// While the end of the file is not reached and the read does not fail
|
|
while (!feof($fileHandle) && isSuccess($readBlockResult = $this->readBlock($fileHandle)))
|
|
{
|
|
// Concatenate the content of the file
|
|
$fileContent .= getData($readBlockResult);
|
|
}
|
|
|
|
// If an error occurred while reading then return it
|
|
if (isError($readBlockResult)) return $readBlockResult;
|
|
|
|
// Close the file handler
|
|
$closeResult = $this->close($fileHandle);
|
|
if (isError($closeResult)) return $closeResult; // if it fails then return the error
|
|
|
|
// If everything was fine encode the file content into base64 and return it as a success
|
|
return success(base64_encode($fileContent));
|
|
}
|
|
|
|
/**
|
|
* Writes the given content into the given file. The content is base64 encoded
|
|
*/
|
|
public function writeBase64($filename, $content)
|
|
{
|
|
// Open the file in read and write mode
|
|
$openWriteResult = $this->openReadWrite($filename);
|
|
if (isError($openWriteResult)) return $openWriteResult; // if an error occurred then return it
|
|
|
|
$fileHandle = getData($openWriteResult); // get the file handle
|
|
|
|
// Writes the given base64 encoded content into to given file
|
|
$writeResult = $this->write($fileHandle, base64_decode($content));
|
|
// If an error occurred while writing then return it
|
|
if (isError($writeResult)) return $writeResult;
|
|
|
|
// Close the file handler
|
|
$closeResult = $this->close($fileHandle);
|
|
if (isError($closeResult)) return $closeResult; // if it fails then return the error
|
|
|
|
// If everything was fine
|
|
return success();
|
|
}
|
|
|
|
/**
|
|
* Appends the given content into the given file. The content is base64 encoded
|
|
*/
|
|
public function appendBase64($filename, $content)
|
|
{
|
|
// Open the file in read and append mode
|
|
$openWriteResult = $this->openReadAppend($filename);
|
|
if (isError($openWriteResult)) return $openWriteResult; // if an error occurred then return it
|
|
|
|
$fileHandle = getData($openWriteResult); // get the file handle
|
|
|
|
// Writes the given base64 encoded content into to given file
|
|
$writeResult = $this->write($fileHandle, base64_decode($content));
|
|
// If an error occurred while writing then return it
|
|
if (isError($writeResult)) return $writeResult;
|
|
|
|
// Close the file handler
|
|
$closeResult = $this->close($fileHandle);
|
|
if (isError($closeResult)) return $closeResult; // if it fails then return the error
|
|
|
|
// If everything was fine
|
|
return success();
|
|
}
|
|
|
|
/**
|
|
* Delete data from file system
|
|
* NOTE: it does not work with the base64 encoding but it has been kept for retro compatibility
|
|
*
|
|
* @param string $id Primary Key for DELETE
|
|
* @return array
|
|
*/
|
|
public function removeBase64($filename)
|
|
{
|
|
// Check Class-Attributes
|
|
if (is_null($this->_path)) return error('The given _path in not valid', EXIT_ERROR);
|
|
|
|
// Check method parameters
|
|
if (is_null($filename)) return error('The given filename is not valid', EXIT_ERROR);
|
|
|
|
if (unlink($this->_path.DIRECTORY_SEPARATOR.$filename) === true)
|
|
{
|
|
return success();
|
|
}
|
|
else
|
|
{
|
|
return error('An error occurred while removing a file', EXIT_ERROR);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Rename a file
|
|
* NOTE: it does not work with the base64 encoding but it has been kept for retro compatibility
|
|
*
|
|
* @param string $id Primary Key for DELETE
|
|
* @return array
|
|
*/
|
|
public function renameBase64($filename, $newFilename)
|
|
{
|
|
// Check Class-Attributes
|
|
if (is_null($this->_path)) return error('The given _path in not valid', EXIT_ERROR);
|
|
|
|
// Check method parameters
|
|
if (is_null($filename)) return error('The given filename is not valid', EXIT_ERROR);
|
|
if (is_null($newFilename)) return error('The given new filename is not valid', EXIT_ERROR);
|
|
|
|
if (rename($this->_path.DIRECTORY_SEPARATOR.$filename, $this->_path.DIRECTORY_SEPARATOR.$newFilename) === true)
|
|
{
|
|
return success();
|
|
}
|
|
else
|
|
{
|
|
return error('An error occurred while renaming a file', EXIT_ERROR);
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------------------------------------------------
|
|
// Private methods
|
|
|
|
/**
|
|
* Checks if the given $this->_path is a valid directory
|
|
*/
|
|
private function _checkPath()
|
|
{
|
|
// If _path...
|
|
if (!isEmptyString($this->_path) // ...is a not empty string...
|
|
&& file_exists($this->_path) && is_dir($this->_path)) // ...exists on the file system and it is a directory...
|
|
{
|
|
return success(); // return a success
|
|
}
|
|
|
|
// If not a valid path return an error
|
|
return error('The given path is not valid: '.$this->_path);
|
|
}
|
|
|
|
/**
|
|
* Open a file using the provided mode
|
|
* It returns a file handle
|
|
* Or write and append if the file does not exist then creates it
|
|
*/
|
|
private function _open($filename, $mode)
|
|
{
|
|
// Check if the property _path represents a valid directory
|
|
$checkResult = $this->_checkPath();
|
|
if (isError($checkResult)) return $checkResult; // If not then return the error
|
|
|
|
// Full file path: path + filename
|
|
$fileFullPath = $this->_path.DIRECTORY_SEPARATOR.$filename;
|
|
|
|
// If needed then check if the file exists and really it is a file
|
|
if ($mode == self::READ_MODE && (!file_exists($fileFullPath) || !is_file($fileFullPath)))
|
|
{
|
|
return error('Trying to read a not existing file');
|
|
}
|
|
|
|
// If needed then check if it is possible to read from the path and the file
|
|
if ($mode == self::READ_MODE && (!is_readable($this->_path) || !is_readable($fileFullPath)))
|
|
{
|
|
return error('The given path or filename are not readable: '.$fileFullPath);
|
|
}
|
|
|
|
// If needed then check if the path and the filename are writable
|
|
if (($mode == self::READ_WRITE_MODE || $mode == self::READ_APPEND_MODE)
|
|
&& (!is_writable($this->_path) || (file_exists($fileFullPath) && !is_writable($fileFullPath))))
|
|
{
|
|
return error('The given path or filename are not writable: '.$fileFullPath);
|
|
}
|
|
|
|
// Open the file in read mode
|
|
$fileHandle = fopen($fileFullPath, $mode);
|
|
|
|
// If it was a failure the return the error
|
|
if ($fileHandle === false) return error('An error occurred while opening a file in '.$mode.' mode');
|
|
|
|
// Otherwise return the file handle
|
|
return success($fileHandle);
|
|
}
|
|
}
|
|
|