<?php
namespace CodeIgniter\HTTP\Files;

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014-2019 British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package    CodeIgniter
 * @author     CodeIgniter Dev Team
 * @copyright  2014-2019 British Columbia Institute of Technology (https://bcit.ca/)
 * @license    https://opensource.org/licenses/MIT	MIT License
 * @link       https://codeigniter.com
 * @since      Version 3.0.0
 * @filesource
 */

use CodeIgniter\Files\File;
use CodeIgniter\HTTP\Exceptions\HTTPException;

/**
 * Value object representing a single file uploaded through an
 * HTTP request. Used by the IncomingRequest class to
 * provide files.
 *
 * Typically, implementors will extend the SplFileInfo class.
 *
 * @package CodeIgniter\HTTP
 */
class UploadedFile extends File implements UploadedFileInterface
{

	/**
	 * The path to the temporary file.
	 *
	 * @var string
	 */
	protected $path;

	/**
	 * The original filename as provided by the client.
	 *
	 * @var string
	 */
	protected $originalName;

	/**
	 * The filename given to a file during a move.
	 *
	 * @var string
	 */
	protected $name;

	/**
	 * The type of file as provided by PHP
	 *
	 * @var string
	 */
	protected $originalMimeType;

	/**
	 * The error constant of the upload
	 * (one of PHP's UPLOADERRXXX constants)
	 *
	 * @var integer
	 */
	protected $error;

	/**
	 * Whether the file has been moved already or not.
	 *
	 * @var boolean
	 */
	protected $hasMoved = false;

	//--------------------------------------------------------------------

	/**
	 * Accepts the file information as would be filled in from the $_FILES array.
	 *
	 * @param string  $path         The temporary location of the uploaded file.
	 * @param string  $originalName The client-provided filename.
	 * @param string  $mimeType     The type of file as provided by PHP
	 * @param integer $size         The size of the file, in bytes
	 * @param integer $error        The error constant of the upload (one of PHP's UPLOADERRXXX constants)
	 */
	public function __construct(string $path, string $originalName, string $mimeType = null, int $size = null, int $error = null)
	{
		$this->path             = $path;
		$this->name             = $originalName;
		$this->originalName     = $originalName;
		$this->originalMimeType = $mimeType;
		$this->size             = $size;
		$this->error            = $error;

		parent::__construct($path, false);
	}

	//--------------------------------------------------------------------

	/**
	 * Move the uploaded file to a new location.
	 *
	 * $targetPath may be an absolute path, or a relative path. If it is a
	 * relative path, resolution should be the same as used by PHP's rename()
	 * function.
	 *
	 * The original file MUST be removed on completion.
	 *
	 * If this method is called more than once, any subsequent calls MUST raise
	 * an exception.
	 *
	 * When used in an SAPI environment where $_FILES is populated, when writing
	 * files via moveTo(), is_uploaded_file() and move_uploaded_file() SHOULD be
	 * used to ensure permissions and upload status are verified correctly.
	 *
	 * If you wish to move to a stream, use getStream(), as SAPI operations
	 * cannot guarantee writing to stream destinations.
	 *
	 * @see http://php.net/is_uploaded_file
	 * @see http://php.net/move_uploaded_file
	 *
	 * @param string  $targetPath Path to which to move the uploaded file.
	 * @param string  $name       the name to rename the file to.
	 * @param boolean $overwrite  State for indicating whether to overwrite the previously generated file with the same
	 *                            name or not.
	 *
	 * @return boolean
	 *
	 * @throws \InvalidArgumentException if the $path specified is invalid.
	 * @throws \RuntimeException on any error during the move operation.
	 * @throws \RuntimeException on the second or subsequent call to the method.
	 */
	public function move(string $targetPath, string $name = null, bool $overwrite = false)
	{
		$targetPath = $this->setPath($targetPath); //set the target path

		if ($this->hasMoved)
		{
			throw HTTPException::forAlreadyMoved();
		}

		if (! $this->isValid())
		{
			throw HTTPException::forInvalidFile();
		}

		$targetPath  = rtrim($targetPath, '/') . '/';
		$name        = is_null($name) ? $this->getName() : $name;
		$destination = $overwrite ? $targetPath . $name : $this->getDestination($targetPath . $name);

		try
		{
			move_uploaded_file($this->path, $destination);
		}
		catch (\Exception $e)
		{
			$error = error_get_last();
			throw HTTPException::forMoveFailed(basename($this->path), $targetPath, strip_tags($error['message']));
		}

		@chmod($targetPath, 0777 & ~umask());

		// Success, so store our new information
		$this->path     = $targetPath;
		$this->name     = basename($destination);
		$this->hasMoved = true;

		return true;
	}

	/**
	 * create file target path if
	 * the set path does not exist
	 *
	 * @param string $path
	 *
	 * @return string The path set or created.
	 */
	protected function setPath($path)
	{
		if (! is_dir($path))
		{
			mkdir($path, 0777, true);
			//create the index.html file
			if (! is_file($path . 'index.html'))
			{
				$file = fopen($path . 'index.html', 'x+');
				fclose($file);
			}
		}
		return $path;
	}

	//--------------------------------------------------------------------

	/**
	 * Returns whether the file has been moved or not. If it has,
	 * the move() method will not work and certain properties, like
	 * the tempName, will no longer be available.
	 *
	 * @return boolean
	 */
	public function hasMoved(): bool
	{
		return $this->hasMoved;
	}

	//--------------------------------------------------------------------

	/**
	 * Retrieve the error associated with the uploaded file.
	 *
	 * The return value MUST be one of PHP's UPLOAD_ERR_XXX constants.
	 *
	 * If the file was uploaded successfully, this method MUST return
	 * UPLOAD_ERR_OK.
	 *
	 * Implementations SHOULD return the value stored in the "error" key of
	 * the file in the $_FILES array.
	 *
	 * @see    http://php.net/manual/en/features.file-upload.errors.php
	 * @return integer One of PHP's UPLOAD_ERR_XXX constants.
	 */
	public function getError(): int
	{
		if (is_null($this->error))
		{
			return UPLOAD_ERR_OK;
		}

		return $this->error;
	}

	//--------------------------------------------------------------------

	/**
	 * Get error string
	 *
	 * @staticvar array $errors
	 *
	 * @return string
	 */
	public function getErrorString()
	{
		$errors = [
			UPLOAD_ERR_OK         => lang('HTTP.uploadErrOk'),
			UPLOAD_ERR_INI_SIZE   => lang('HTTP.uploadErrIniSize'),
			UPLOAD_ERR_FORM_SIZE  => lang('HTTP.uploadErrFormSize'),
			UPLOAD_ERR_PARTIAL    => lang('HTTP.uploadErrPartial'),
			UPLOAD_ERR_NO_FILE    => lang('HTTP.uploadErrNoFile'),
			UPLOAD_ERR_CANT_WRITE => lang('HTTP.uploadErrCantWrite'),
			UPLOAD_ERR_NO_TMP_DIR => lang('HTTP.uploadErrNoTmpDir'),
			UPLOAD_ERR_EXTENSION  => lang('HTTP.uploadErrExtension')
		];

		$error = is_null($this->error) ? UPLOAD_ERR_OK : $this->error;

		return sprintf($errors[$error] ?? lang('HTTP.uploadErrUnknown'), $this->getName());
	}

	//--------------------------------------------------------------------

	/**
	 * Returns the mime type as provided by the client.
	 * This is NOT a trusted value.
	 * For a trusted version, use getMimeType() instead.
	 *
	 * @return string|null The media type sent by the client or null if none
	 *                     was provided.
	 */
	public function getClientMimeType(): string
	{
		return $this->originalMimeType;
	}

	//--------------------------------------------------------------------

	/**
	 * Retrieve the filename. This will typically be the filename sent
	 * by the client, and should not be trusted. If the file has been
	 * moved, this will return the final name of the moved file.
	 *
	 * @return string|null The filename sent by the client or null if none
	 *     was provided.
	 */
	public function getName(): string
	{
		return $this->name;
	}

	//--------------------------------------------------------------------

	/**
	 * Returns the name of the file as provided by the client during upload.
	 *
	 * @return string
	 */
	public function getClientName(): string
	{
		return $this->originalName;
	}

	//--------------------------------------------------------------------

	/**
	 * Gets the temporary filename where the file was uploaded to.
	 *
	 * @return string
	 */
	public function getTempName(): string
	{
		return $this->path;
	}

	//--------------------------------------------------------------------

	/**
	 * Overrides SPLFileInfo's to work with uploaded files, since
	 * the temp file that's been uploaded doesn't have an extension.
	 *
	 * Is simply an alias for guessExtension for a safer method
	 * than simply relying on the provided extension.
	 * Additionally it will return clientExtension in case if there are
	 * other extensions with the same mime type.
	 */
	public function getExtension(): string
	{
		return $this->guessExtension();
	}

	public function guessExtension(): ?string
	{
		return \Config\Mimes::guessExtensionFromType($this->getClientMimeType(), $this->getClientExtension());
	}

	//--------------------------------------------------------------------

	/**
	 * Returns the original file extension, based on the file name that
	 * was uploaded. This is NOT a trusted source.
	 * For a trusted version, use guessExtension() instead.
	 *
	 * @return string|null
	 */
	public function getClientExtension(): string
	{
		return pathinfo($this->originalName, PATHINFO_EXTENSION) ?? '';
	}

	//--------------------------------------------------------------------

	/**
	 * Returns whether the file was uploaded successfully, based on whether
	 * it was uploaded via HTTP and has no errors.
	 *
	 * @return boolean
	 */
	public function isValid(): bool
	{
		return is_uploaded_file($this->path) && $this->error === UPLOAD_ERR_OK;
	}

	/**
	 * Save the uploaded file to a new location.
	 *
	 * By default, upload files are saved in writable/uploads directory. The YYYYMMDD folder
	 * and random file name will be created.
	 *
	 * @param  string $folderName the folder name to writable/uploads directory.
	 * @param  string $fileName   the name to rename the file to.
	 * @return string file full path
	 */
	public function store($folderName = null, $fileName = null): string
	{
		$folderName = $folderName ?? date('Ymd');
		$fileName   = $fileName ?? $this->getRandomName();

		// Move the uploaded file to a new location.
		return ($this->move(WRITEPATH . 'uploads/' . $folderName, $fileName)) ?
				$folderName . DIRECTORY_SEPARATOR . $this->name : null;
	}

	//--------------------------------------------------------------------
}