<?php
/**
* Image validator class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\validators;
use Yii;
use yii\web\UploadedFile;
use yii\helpers\FileHelper;
/**
* ImageValidator verifies if an attribute is receiving a valid image.
*
* @author Taras Gudz < gudz.taras @ gmail . com >
* @since 2.0
*/
class ImageValidator extends FileValidator
{
/**
* @var string the error message used when the uploaded file is not an image.
* You may use the following tokens in the message:
*
* - {attribute}: the attribute name
* - {file}: the uploaded file name
*/
public $notImage;
/**
* @var integer the minimum width in pixels.
* Defaults to null, meaning no limit.
* @see underWidth
*/
public $minWidth;
/**
* @var integer the maximum width in pixels.
* Defaults to null, meaning no limit.
* @see overWidth
*/
public $maxWidth;
/**
* @var integer the minimum height in pixels.
* Defaults to null, meaning no limit.
* @see underHeight
*/
public $minHeight;
/**
* @var integer the maximum width in pixels.
* Defaults to null, meaning no limit.
* @see overWidth
*/
public $maxHeight;
/**
* @var array|string a list of file mime types that are allowed to be uploaded.
* This can be either an array or a string consisting of file mime types
* separated by space or comma (e.g. "image/jpeg, image/png").
* Mime type names are case-insensitive. Defaults to null, meaning all mime types
* are allowed.
* @see wrongMimeType
*/
public $mimeTypes;
/**
* @var string the error message used when the image is under [[minWidth]].
* You may use the following tokens in the message:
*
* - {attribute}: the attribute name
* - {file}: the uploaded file name
* - {limit}: the value of [[minWidth]]
*/
public $underWidth;
/**
* @var string the error message used when the image is over [[maxWidth]].
* You may use the following tokens in the message:
*
* - {attribute}: the attribute name
* - {file}: the uploaded file name
* - {limit}: the value of [[maxWidth]]
*/
public $overWidth;
/**
* @var string the error message used when the image is under [[minHeight]].
* You may use the following tokens in the message:
*
* - {attribute}: the attribute name
* - {file}: the uploaded file name
* - {limit}: the value of [[minHeight]]
*/
public $underHeight;
/**
* @var string the error message used when the image is over [[maxHeight]].
* You may use the following tokens in the message:
*
* - {attribute}: the attribute name
* - {file}: the uploaded file name
* - {limit}: the value of [[maxHeight]]
*/
public $overHeight;
/**
* @var string the error message used when the file has an mime type
* that is not listed in [[mimeTypes]].
* You may use the following tokens in the message:
*
* - {attribute}: the attribute name
* - {file}: the uploaded file name
* - {mimeTypes}: the value of [[mimeTypes]]
*/
public $wrongMimeType;
/**
* @inheritdoc
*/
public function init()
{
parent::init();
if ($this->notImage === null) {
$this->notImage = Yii::t('yii', 'The file "{file}" is not an image.');
}
if ($this->underWidth === null) {
$this->underWidth = Yii::t('yii', 'The file "{file}" is too small. The width cannot be smaller than {limit, number} {limit, plural, one{pixel} other{pixels}}.');
}
if ($this->underHeight === null) {
$this->underHeight = Yii::t('yii', 'The file "{file}" is too small. The height cannot be smaller than {limit, number} {limit, plural, one{pixel} other{pixels}}.');
}
if ($this->overWidth === null) {
$this->overWidth = Yii::t('yii', 'The file "{file}" is too large. The width cannot be larger than {limit, number} {limit, plural, one{pixel} other{pixels}}.');
}
if ($this->overHeight === null) {
$this->overHeight = Yii::t('yii', 'The file "{file}" is too large. The height cannot be larger than {limit, number} {limit, plural, one{pixel} other{pixels}}.');
}
if ($this->wrongMimeType === null) {
$this->wrongMimeType = Yii::t('yii', 'Only files with these mimeTypes are allowed: {mimeTypes}.');
}
if (!is_array($this->mimeTypes)) {
$this->mimeTypes = preg_split('/[\s,]+/', strtolower($this->mimeTypes), -1, PREG_SPLIT_NO_EMPTY);
}
}
/**
* @inheritdoc
*/
protected function validateValue($file)
{
$result = parent::validateValue($file);
return empty($result) ? $this->validateImage($file) : $result;
}
/**
* Validates an image file.
* @param UploadedFile $image uploaded file passed to check against a set of rules
* @return array|null the error message and the parameters to be inserted into the error message.
* Null should be returned if the data is valid.
*/
protected function validateImage($image)
{
if (!empty($this->mimeTypes) & & !in_array(FileHelper::getMimeType($image->tempName), $this->mimeTypes, true)) {
return [$this->wrongMimeType, ['file' => $image->name, 'mimeTypes' => implode(', ', $this->mimeTypes)]];
}
if (false === ($imageInfo = getimagesize($image->tempName))) {
return [$this->notImage, ['file' => $image->name]];
}
list($width, $height, $type) = $imageInfo;
if ($width == 0 || $height == 0) {
return [$this->notImage, ['file' => $image->name]];
}
if ($this->minWidth !== null & & $width < $this->minWidth) {
return [$this->underWidth, ['file' => $image->name, 'limit' => $this->minWidth]];
}
if ($this->minHeight !== null & & $height < $this->minHeight) {
return [$this->underHeight, ['file' => $image->name, 'limit' => $this->minHeight]];
}
if ($this->maxWidth !== null & & $width > $this->maxWidth) {
return [$this->overWidth, ['file' => $image->name, 'limit' => $this->maxWidth]];
}
if ($this->maxHeight !== null & & $height > $this->maxHeight) {
return [$this->overHeight, ['file' => $image->name, 'limit' => $this->maxHeight]];
}
return null;
}
}
