README

This extension intended to handle images associated with model.

Extensions provides user friendly widget, for image upload and removal.

Features

1. Asynchronous image upload
2. Ability to generate few image versions with different configurations
3. Drag & Drop

Decencies

1. Yii2
2. Twitter bootstrap assets
3. Imagine library

Installation:

The preferred way to install this extension is through composer.

Either run

php composer.phar require --prefer-dist zxbodya/yii2-image-attachment "*@dev"

or add

"zxbodya/yii2-image-attachment": "*@dev"

to the require section of your composer.json file.

Usage

Add ImageAttachmentBehavior to your model, and configure it, create folder for uploaded files.

public function behaviors()
{
    return [
        'coverBehavior' => [
            'class' => ImageAttachmentBehavior::className(),
            // type name for model
            'type' => 'post',
            // image dimmentions for preview in widget 
            'previewHeight' => 200,
            'previewWidth' => 300,
            // extension for images saving
            'extension' => 'jpg',
            // path to location where to save images
            'directory' => Yii::getAlias('@webroot') . '/images/post/cover',
            'url' => Yii::getAlias('@web') . '/images/post/cover',
            // additional image versions
            'versions' => [
                'small' => function ($img) {
                    /** @var ImageInterface $img */
                    return $img
                        ->copy()
                        ->resize($img->getSize()->widen(200));
                },
                'medium' => function ($img) {
                    /** @var ImageInterface $img */
                    $dstSize = $img->getSize();
                    $maxWidth = 800;
                    if ($dstSize->getWidth() > $maxWidth) {
                        $dstSize = $dstSize->widen($maxWidth);
                    }
                    return [
                        $img->copy()->resize($dstSize),
                        ['jpeg_quality' => 80], // options used when saving image (Imagine::save)
                    ];
                },
            ]
        ]
    ];
}

Add ImageAttachmentAction in controller somewhere in your application. Also on this step you can add some security checks for this action.

public function actions()
{
    return [
        'imgAttachApi' => [
            'class' => ImageAttachmentAction::className(),
            // mappings between type names and model classes (should be the same as in behaviour)
            'types' => [
                'post' => Post::className()
            ]
        ],
    ];
}

Add ImageAttachmentWidget somewhere in you application, for example in editing from.

echo ImageAttachmentWidget::widget(
    [
        'model' => $model,
        'behaviorName' => 'coverBehavior',
        'apiRoute' => 'test/imgAttachApi',
    ]
)

Done! Now, you can use it in other places in app too:

if ($model->getBehavior('coverBehavior')->hasImage()) {
    echo Html::img($model->getBehavior('coverBehavior')->getUrl('medium'));
}