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<?php

/**
 * MvcCore
 *
 * This source file is subject to the BSD 3 License
 * For the full copyright and license information, please view
 * the LICENSE.md file that are distributed with this source code.
 *
 * @copyright   Copyright (c) 2016 Tom Flidr (https://github.com/mvccore)
 * @license     https://mvccore.github.io/docs/mvccore/5.0.0/LICENCE.md
 */

namespace MvcCore\Ext\Forms\Field\Props;

/**
 * Trait for classes:
 * - `\MvcCore\Ext\Forms\Fields\File`
 * - `\MvcCore\Ext\Forms\Validators\Files`
 */
trait Files {

    /**
     * List of allowed file mimetypes or file extensions. 
     * All defined file mimetypes are checked with `finfo` PHP extension and checked by
     * allowed file extensions for defined mimetype.
     * All defined file extensions are translated internally on server side into mimetypes,
     * then checked with `finfo` PHP extension and checked by
     * allowed file extensions for defined mimetype.
     * Example: `$this->accept = ['image/*', 'audio/mp3', '.docx'];`
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-accept
     * @var \string[]
     */
    protected $accept = [];

    /**
     * Boolean attribute indicates that capture of media directly from the 
     * device's sensors using a media capture mechanism is preferred, 
     * such as a webcam or microphone. This HTML attribute is used on mobile devices.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-capture
     * @see https://www.w3.org/TR/html-media-capture/#dfn-media-capture-mechanism
     * @var string|NULL
     */
    protected $capture = NULL;

    /**
     * Allowed file name characters and characters groups for submit regular expression.
     * All regular expression special characters will be escaped by `addcslashes()` 
     * function to create proper regular expression pattern to keep only characters 
     * and characters groups presented in this variable. If there are not defined any 
     * characters, there is used in submit filename sanitization PHP constant: 
     * `static::ALLOWED_FILE_NAME_CHARS_DEFAULT`;
     * @var string|NULL
     */
    protected $allowedFileNameChars = NULL;

    /**
     * Minimum uploaded files count. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-min-count="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @var int|NULL
     */
    protected $minCount = NULL;

    /**
     * Maximum uploaded files count. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-max-count="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @var int|NULL
     */
    protected $maxCount = NULL;

    /**
     * Minimum uploaded file size for one uploaded item in bytes. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-min-size="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @var int|NULL
     */
    protected $minSize = NULL;

    /**
     * Maximum uploaded file size for one uploaded item in bytes. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-max-size="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @var int|NULL
     */
    protected $maxSize = NULL;

    /**
     * Maximum number of allowed files count inside 
     * single uploaded archive file. If uploaded archive 
     * has more files inside than this number, it's 
     * proclaimed as archive bomb and it's not uploaded.
     * Default value is `1000`.
     * @var int
     */
    protected $archiveMaxItems = 1000;

    /**
     * Maximum number of allowed ZIP archive levels inside.
     * If uploaded archive contains another zip archive and
     * those archive another and another, this is maximum
     * level for nested ZIP archives. If Archive contains 
     * more levels than this, it's proclaimed as archive 
     * bomb and it's not uploaded. Default value is `3`.
     * @var int
     */
    protected $archiveMaxLevels = 3;

    /**
     * Maximum archive compression percentage.
     * If archive file has lower percentage size
     * than all archive file items together, 
     * it's proclaimed as archive bomb and it's 
     * not uploaded. Default value is `10000`.
     * @var float
     */
    protected $archiveMaxCompressPercentage = 10.0;

    /**
     * PNG image maximum width or maximum height.
     * PNG images use ZIP compression and that's why 
     * those images could be used as ZIP bombs.
     * This limit helps to prevent file bombs 
     * based on PNG images.
     * @var int
     */
    protected $pngImageMaxWidthHeight = 10000;

    /**
     * Bomb scanner classes to scan uploaded files for file bombs.
     * All classes in this list must implement interface:
     * `\MvcCore\Ext\Forms\Validators\Files\Validations\IBombScanner`.
     * @var \string[]
     */
    protected $bombScanners = [
        '\\MvcCore\\Ext\\Forms\\Validators\\Files\\Validations\\BombScanners\\ZipArchive',
        '\\MvcCore\\Ext\\Forms\\Validators\\Files\\Validations\\BombScanners\\PngImage',
        '\\MvcCore\\Ext\\Forms\\Validators\\Files\\Validations\\BombScanners\\GzArchive'
    ];

    /**
     * Get list of allowed file mime-types or file extensions. 
     * All defined file mime-types are checked with `finfo` PHP extension and checked by
     * allowed file extensions for defined mime-type.
     * All defined file extensions are translated internally on server side into mime-types,
     * then checked with `finfo` PHP extension and checked by
     * allowed file extensions for defined mime-type.
     * Example: `$this->accept = ['image/*', 'audio/mp3', '.docx'];`
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-accept
     * @return \string[]
     */
    public function GetAccept () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->accept;
    }

    /**
     * Set list of allowed file mime-types or file extensions. 
     * All defined file mime-types are checked with `finfo` PHP extension and checked by
     * allowed file extensions for defined mime-type.
     * All defined file extensions are translated internally on server side into mime-types,
     * then checked with `finfo` PHP extension and checked by
     * allowed file extensions for defined mime-type.
     * Example: `$this->accept = ['image/*', 'audio/mp3', '.docx'];`
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-accept
     * @param \string[] $accept 
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetAccept (array $accept = []) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->accept = $accept;
        return $this;
    }

    /**
     * Get boolean attribute indicates that capture of media directly from the 
     * device's sensors using a media capture mechanism is preferred, 
     * such as a webcam or microphone. This HTML attribute is used on mobile devices.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-capture
     * @return string|NULL
     */
    public function GetCapture () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->capture;
    }

    /**
     * Set boolean attribute indicates that capture of media directly from the 
     * device's sensors using a media capture mechanism is preferred, 
     * such as a webcam or microphone. This HTML attribute is used on mobile devices.
     * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-capture
     * @param string|NULL $capture 
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetCapture ($capture = 'camera') {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->capture = $capture;
        return $this;
    }

    /**
     * Get allowed file name characters and characters groups for submit regular expression.
     * All regular expression special characters will be escaped by `addcslashes()` 
     * function to create proper regular expression pattern to keep only characters 
     * and characters groups presented in this variable. If there are not defined any 
     * characters, there is used in submit filename sanitization PHP constant: 
     * `static::ALLOWED_FILE_NAME_CHARS_DEFAULT`;
     * @return string|NULL
     */
    public function GetAllowedFileNameChars () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->allowedFileNameChars;
    }

    /**
     * Set allowed file name characters and characters groups for submit regular expression.
     * All regular expression special characters will be escaped by `addcslashes()` 
     * function to create proper regular expression pattern to keep only characters 
     * and characters groups presented in this variable. If there are not defined any 
     * characters, there is used in submit filename sanitization PHP constant: 
     * `static::ALLOWED_FILE_NAME_CHARS_DEFAULT`;
     * @param string|NULL $allowedFileNameChars
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetAllowedFileNameChars ($allowedFileNameChars) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->allowedFileNameChars = $allowedFileNameChars;
        return $this;
    }

    /**
     * Get minimum uploaded files count. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-min-count="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @return int|NULL
     */
    public function GetMinCount () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->minCount;
    }

    /**
     * Set minimum uploaded files count. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-min-count="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @param int|NULL $minCount
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetMinCount ($minCount) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->minCount = $minCount === NULL ? NULL : intval($minCount);
        return $this;
    }

    /**
     * Get maximum uploaded files count. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-max-count="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @return int|NULL
     */
    public function GetMaxCount () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->maxCount;
    }

    /**
     * Set maximum uploaded files count. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-max-count="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @param int|NULL $maxCount
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetMaxCount ($maxCount) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->maxCount = $maxCount === NULL ? NULL : intval($maxCount);
        return $this;
    }

    /**
     * Get minimum uploaded file size for one uploaded item in bytes. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-min-size="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @return int|NULL
     */
    public function GetMinSize () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->minSize;
    }

    /**
     * Set minimum uploaded file size for one uploaded item in bytes. `NULL` by default.
     * You can use integer value or human form string like `1MB`.
     * This attribute is not HTML5, it's rendered as `data-min-size="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @param int|NULL $minSize
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetMinSize ($minSize) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        if ($minSize !== NULL)
            $this->minSize = \MvcCore\Ext\Form::ConvertBytesFromHumanForm(
                $minSize
            );
        return $this;
    }

    /**
     * Get maximum uploaded file size for one uploaded item in bytes. `NULL` by default.
     * This attribute is not HTML5, it's rendered as `data-max-size="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @return int|NULL
     */
    public function GetMaxSize () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->maxSize;
    }

    /**
     * Set maximum uploaded file size for one uploaded item in bytes. `NULL` by default.
     * You can use integer value or human form string like `5MB`.
     * This attribute is not HTML5, it's rendered as `data-max-size="..."`.
     * Attribute is not used on client side by default, but you can do it, it's
     * only checked if attribute is not `NULL` in submit processing.
     * @param int|string|NULL $maxSize
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetMaxSize ($maxSize) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        if ($maxSize !== NULL)
            $this->maxSize = \MvcCore\Ext\Form::ConvertBytesFromHumanForm(
                $maxSize
            );
        return $this;
    }

    /**
     * Set maximum number of allowed files count inside 
     * single uploaded archive file. If uploaded archive 
     * has more files inside than this number, it's 
     * proclaimed as archive bomb and it's not uploaded.
     * Default value is `1000`.
     * @param int $archiveMaxItems Default `1000`.
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetArchiveMaxItems ($archiveMaxItems = 1000) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->archiveMaxItems = $archiveMaxItems;
        return $this;
    }
    
    /**
     * Get maximum number of allowed files count inside 
     * single uploaded archive file. If uploaded archive 
     * has more files inside than this number, it's 
     * proclaimed as archive bomb and it's not uploaded.
     * Default value is `1000`.
     * @return int
     */
    public function GetArchiveMaxItems () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->archiveMaxItems;
    }

    /**
     * Maximum number of allowed ZIP archive levels inside.
     * If uploaded archive contains another zip archive and
     * those archive another and another, this is maximum
     * level for nested ZIP archives. If Archive contains 
     * more levels than this, it's proclaimed as archive 
     * bomb and it's not uploaded. Default value is `3`.
     * @param int $archiveMaxLevels Default `3`.
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetArchiveMaxLevels ($archiveMaxLevels = 3) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->archiveMaxLevels = $archiveMaxLevels;
        return $this;
    }
    
    /**
     * Maximum number of allowed ZIP archive levels inside.
     * If uploaded archive contains another zip archive and
     * those archive another and another, this is maximum
     * level for nested ZIP archives. If Archive contains 
     * more levels than this, it's proclaimed as archive 
     * bomb and it's not uploaded. Default value is `3`.
     * @return int
     */
    public function GetArchiveMaxLevels () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->archiveMaxLevels;
    }

    /**
     * Set maximum archive compression percentage.
     * If archive file has lower percentage size
     * than all archive file items together, 
     * it's proclaimed as archive bomb and it's 
     * not uploaded.
     * @param float $archiveMaxCompressPercentage Default `10.0`.
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetArchiveMaxCompressPercentage ($archiveMaxCompressPercentage = 10.0) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->archiveMaxCompressPercentage = $archiveMaxCompressPercentage;
        return $this;
    }
    
    /**
     * Get maximum archive compression percentage.
     * If archive file has lower percentage size
     * than all archive file items together, 
     * it's proclaimed as archive bomb and it's 
     * not uploaded.
     * @return float
     */
    public function GetArchiveMaxCompressPercentage () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->archiveMaxCompressPercentage;
    }

    /**
     * PNG image maximum width or maximum height.
     * PNG images use ZIP compression and that's why 
     * those images could be used as ZIP bombs.
     * This limit helps to prevent file bombs 
     * based on PNG images. Default value is `10000`.
     * @param int $pngImageMaxWidthHeight Default `10.0`.
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetPngImageMaxWidthHeight ($pngImageMaxWidthHeight = 10000) {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $this->pngImageMaxWidthHeight = $pngImageMaxWidthHeight;
        return $this;
    }
    
    /**
     * PNG image maximum width or maximum height.
     * PNG images use ZIP compression and that's why 
     * those images could be used as ZIP bombs.
     * This limit helps to prevent file bombs 
     * based on PNG images. Default value is `10000`.
     * @return int
     */
    public function GetPngImageMaxWidthHeight () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->pngImageMaxWidthHeight;
    }

    /**
     * Add bomb scanner class(es) to scan uploaded files for file bombs.
     * All classes in this list must implement interface:
     * `\MvcCore\Ext\Forms\Validators\Files\Validations\IBombScanner`.
     * @param \string[] $bombScannerClasses,...
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function AddBombScanners () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $args = func_get_args();
        if (count($args) === 1 && is_array($args)) {
            $bombScannerClasses = $args[0];
        } else {
            $bombScannerClasses = $args;
        }
        foreach ($bombScannerClasses as $bombScannerClass) {
            if (!in_array($bombScannerClass, $this->bombScanners, TRUE)) {
                $this->bombScanners[] = $bombScannerClass;
            }
        }
        return $this;
    }
    
    /**
     * Set bomb scanner class(es) to scan uploaded files for file bombs.
     * All classes in this list must implement interface:
     * `\MvcCore\Ext\Forms\Validators\Files\Validations\IBombScanner`.
     * @param \string[] $bombScannerClasses
     * @return \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files
     */
    public function SetBombScanners () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        $args = func_get_args();
        if (count($args) === 1 && is_array($args)) {
            $this->bombScanners = $args[0];
        } else {
            $this->bombScanners = $args;
        }
        return $this;
    }

    /**
     * Get bomb scanner class(es) to scan uploaded files for file bombs.
     * All classes in this list must implement interface:
     * `\MvcCore\Ext\Forms\Validators\Files\Validations\IBombScanner`.
     * @return \string[]
     */
    public function GetBombScanners () {
        /** @var $this \MvcCore\Ext\Forms\Fields\File|\MvcCore\Ext\Forms\Validators\Files */
        return $this->bombScanners;
    }
}