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<?php |
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/** |
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* Image behavior for ActiveRecord |
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* |
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* @link https://github.com/inblank/yii2-image |
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* @copyright Copyright (c) 2016 Pavel Aleksandrov <[email protected]> |
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* @license http://opensource.org/licenses/MIT |
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*/ |
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namespace inblank\image; |
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use Imagine\Filter\Advanced\Canvas; |
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use Imagine\Filter\Transformation; |
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use Imagine\Image\Box; |
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use Imagine\Image\Color; |
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use Imagine\Image\ImageInterface; |
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use Imagine\Image\Point; |
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use yii; |
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use yii\base\Behavior; |
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use yii\db\ActiveRecord; |
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/** |
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* Image Behavior Class |
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* |
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* @property ActiveRecord $owner |
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* @property $imageDefaultUrl URL for default image |
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* @property $imageUrl image URL for model. If model not have image, will equal $imageDefaultUrl |
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* @property $imagePath path for image relative document root |
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* @property $imageAbsolutePath absolute path to image file in filesystem |
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* @property $imageFile full, with absolute path, image file name in filesystem |
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*/ |
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class ImageBehavior extends Behavior |
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{ |
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/** Just proportional resize image to fit size */ |
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const NONE = 0; |
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/** Crop image resize strategy */ |
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const CROP = 1; |
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/** Add frame image resize strategy */ |
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const FRAME = 2; |
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/** Transparent color */ |
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const COLOR_TRANSPARENT = null; |
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/** |
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* Name of attribute to store the image |
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* @var string |
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*/ |
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public $imageAttribute = "image"; |
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/** |
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* Default image name |
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* @var string |
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*/ |
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public $imageDefault = "image.png"; |
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/** |
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* Path to store image files. |
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* If empty will be init to /images/<ActiveRecord Class Name> |
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* @var string |
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*/ |
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public $imagePath; |
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/** |
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* Size to convert image |
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* If array: [width, height]. |
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* If integer: use value for with and height. |
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* If not set: image save as is. |
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* @var integer|array |
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*/ |
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public $imageSize; |
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/** |
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* Image resize strategy |
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* @var int |
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*/ |
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public $imageResizeStrategy = self::NONE; |
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/** |
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* Image frame color |
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* @var |
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*/ |
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public $imageFrameColor = "#FFF"; |
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/** |
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* Calculated absolute image path relative to webroot |
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* @var |
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*/ |
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protected $_imageAbsolutePath; |
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/** |
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* @inheritdoc |
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*/ |
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public function events() |
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{ |
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return [ |
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ActiveRecord::EVENT_AFTER_INSERT => 'afterSave', |
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ActiveRecord::EVENT_AFTER_UPDATE => 'afterSave', |
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ActiveRecord::EVENT_AFTER_DELETE => 'afterDelete', |
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ActiveRecord::EVENT_BEFORE_UPDATE => 'beforeUpdate', |
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]; |
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} |
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/** |
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* Before update action |
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*/ |
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public function beforeUpdate() |
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{ |
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// prevent save empty image name value and also for correct remove old image |
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$this->owner->setAttribute($this->imageAttribute, $this->owner->getOldAttribute($this->imageAttribute)); |
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} |
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/** |
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* After save action |
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*/ |
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public function afterSave() |
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{ |
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$this->imageChangeByUpload(); |
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} |
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/** |
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* After delete action |
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*/ |
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public function afterDelete() |
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{ |
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$this->imageRemoveFile(); |
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} |
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/** |
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* Get image path |
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* @return string |
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*/ |
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public function getImagePath() |
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{ |
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if ($this->imagePath === null) { |
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$this->imagePath = '/images/' . strtolower((new \ReflectionClass($this->owner))->getShortName()); |
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} |
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return $this->imagePath; |
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} |
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/** |
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* Get default image URL |
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* @return string |
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* @throws yii\base\InvalidConfigException |
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*/ |
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public function getImageDefaultUrl() |
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{ |
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return $this->_imageUrl($this->imageDefault); |
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} |
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/** |
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* Get absolute team image path in filesystem |
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* @return string |
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*/ |
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public function getImageAbsolutePath() |
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{ |
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if ($this->_imageAbsolutePath === null) { |
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$this->_imageAbsolutePath = Yii::getAlias('@webroot') . |
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'/' . (defined('IS_BACKEND') ? '../' : '') . |
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ltrim($this->getImagePath(), '/'); |
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if (!file_exists($this->_imageAbsolutePath)) { |
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yii\helpers\FileHelper::createDirectory($this->_imageAbsolutePath); |
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} |
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} |
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return $this->_imageAbsolutePath; |
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} |
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/** |
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* Check team image |
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* @return bool |
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* @throws yii\base\InvalidConfigException |
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*/ |
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public function hasImage() |
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{ |
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$image = $this->owner->getAttribute($this->imageAttribute); |
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return !empty($image) && $image != $this->imageDefault; |
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} |
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/** |
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* Check that image file exists |
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*/ |
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public function imageFileExists() |
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{ |
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return file_exists($this->getImageFile()); |
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} |
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/** |
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* Get team image URL |
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* @return string |
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* @throws yii\base\InvalidConfigException |
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*/ |
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public function getImageUrl() |
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{ |
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return !$this->hasImage() ? |
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$this->getImageDefaultUrl() : |
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$this->_imageUrl($this->owner->getAttribute($this->imageAttribute)); |
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} |
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/** |
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* Return filename in filesystem |
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* @return string |
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*/ |
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public function getImageFile() |
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{ |
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return $this->getImageAbsolutePath() . '/' . $this->owner->getAttribute($this->imageAttribute); |
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} |
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/** |
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* Change image by uploaded file |
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*/ |
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public function imageChangeByUpload() |
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{ |
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$formName = $this->owner->formName(); |
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if ($_POST[$formName][$this->imageAttribute] == 'empty') { |
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// reset image |
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$this->imageReset(); |
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} else { |
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// upload new |
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if (!empty($_FILES[$formName]['tmp_name'][$this->imageAttribute])) { |
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$this->imageChange( |
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[$_FILES[$formName]['name'][$this->imageAttribute] => $_FILES[$formName]['tmp_name'][$this->imageAttribute]] |
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); |
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} |
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} |
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} |
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/** |
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* Change image |
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* @param string|array $sourceFile source file. if set as array ['fileName' => 'file_in_filesystem'] |
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* @return bool true, if image was changed and old image file was deleted. false, if image not changed |
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* @throws yii\base\InvalidConfigException |
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*/ |
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public function imageChange($sourceFile) |
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{ |
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if (is_array($sourceFile)) { |
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$fileName = key($sourceFile); |
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$sourceFile = current($sourceFile); |
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} else { |
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$fileName = $sourceFile; |
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} |
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if (!file_exists($sourceFile)) { |
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return false; |
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} |
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$imageName = $this->imageAttribute . '_' . |
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md5(implode('-', (array)$this->owner->getPrimaryKey()) . microtime(true) . rand()) . |
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'.' . pathinfo($fileName)['extension']; |
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$destinationFile = $this->getImageAbsolutePath() . '/' . $imageName; |
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if (!copy($sourceFile, $destinationFile)) { |
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return false; |
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} |
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$this->imageRemoveFile(); |
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if (!empty($this->imageSize)) { |
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$size = $this->imageSize; |
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if (!is_array($size)) { |
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$size = [$size, $size]; |
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} |
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$newBox = new Box($size[0], $size[1]); |
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$image = (new Transformation())->thumbnail( |
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$newBox, |
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$this->imageResizeStrategy == self::CROP ? |
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ImageInterface::THUMBNAIL_OUTBOUND : ImageInterface::THUMBNAIL_INSET |
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)->apply(yii\imagine\Image::getImagine()->open($destinationFile)); |
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$currentBox = $image->getSize(); |
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if ($this->imageResizeStrategy === self::FRAME) { |
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if ($this->imageFrameColor === self::COLOR_TRANSPARENT) { |
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$frameColor = '#fff'; |
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$alpha = 100; |
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} else { |
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$frameColor = $this->imageFrameColor; |
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$alpha = 0; |
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} |
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$image = (new Transformation())->add( |
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new Canvas( |
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yii\imagine\Image::getImagine(), |
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$newBox, |
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$size[0] == $currentBox->getWidth() ? |
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new Point(0, ($size[1] - $currentBox->getHeight()) / 2) : |
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new Point(($size[0] - $currentBox->getWidth()) / 2, 0), |
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new Color($frameColor, $alpha) |
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) |
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)->apply($image); |
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} |
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$image->save($destinationFile); |
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} |
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$this->owner->setAttribute($this->imageAttribute, $imageName); |
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$this->owner->updateAttributes([$this->imageAttribute]); |
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return true; |
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} |
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/** |
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* Reset image to default |
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* @throws yii\base\InvalidConfigException |
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*/ |
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public function imageReset() |
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{ |
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$this->imageRemoveFile(); |
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$this->owner->setAttribute($this->imageAttribute, null); |
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$this->owner->updateAttributes([$this->imageAttribute]); |
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} |
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/** |
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* Remove current image |
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* @throws yii\base\InvalidConfigException |
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*/ |
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protected function imageRemoveFile() |
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{ |
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if ($this->hasImage()) { |
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@unlink($this->getImageFile()); |
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} |
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} |
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/** |
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* Make image URL |
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* @param string $imageFileName image filename |
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* @return string |
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* @throws yii\base\InvalidConfigException |
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*/ |
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protected function _imageUrl($imageFileName) |
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{ |
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return $this->getImagePath() . '/' . $imageFileName; |
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} |
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} |
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Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: