Added image resize options to download

Module.php

@@ -168,4 +168,13 @@ public function detachFile($id)
 
         $file->delete();
     }
+
+    /**
+     * Check if we have the resize functionalities
+     * @throws Exception
+     */
+    public function checkResizeRequirements () 
+    {
+        return class_exists("\\himiklab\\thumbnail\\EasyThumbnailImage");
+    }
 }

README.md

@@ -69,6 +69,8 @@ Installation
 
 6. Make sure that you specified `maxFiles` in module rules and `maxFileCount` on `AttachmentsInput` to the number that you want
 
+7. If you want to use resize features install [himiklab/yii2-easy-thumbnail-image-helper](https://github.com/himiklab/yii2-easy-thumbnail-image-helper)
+
 Usage
 -----
 
@@ -113,6 +115,7 @@ Usage
 Change log
 ----------
 
+- **May 13, 2015** - 	Added optional image resize, using himiklab/yii2-easy-thumbnail-image-helper (maxxer)
 - **May 1, 2015** - 	Fixed uploading when connection is slow or uploading time is long. Now ```onclick``` event on submit button is deprecated
 - **Apr 16, 2015** - 	Allow users to have a custom behavior class inheriting from FileBehavior.
 - **Apr 4, 2015** - 	Now all temp uploaded files will be deleted on every new form opened.

components/AttachmentsTable.php

@@ -71,6 +71,17 @@ public function run()
                 [
                     'class' => 'yii\grid\SerialColumn'
                 ],
+                [
+                    'label' => $this->getModule()->t('attachments', 'Preview'),
+                    'format' => 'raw',
+                    'value' => function ($model) {
+                        return $model->isImage ? Html::a(\himiklab\thumbnail\EasyThumbnailImage::thumbnailImg(
+                                $model->path, 150, 150, 
+                                \himiklab\thumbnail\EasyThumbnailImage::THUMBNAIL_OUTBOUND), 
+                            $model->getViewUrl(), ['target' => '_blank']) : "";
+                    },
+                    'visible' => $this->getModule()->checkResizeRequirements(),
+                ],
                 [
                     'label' => $this->getModule()->t('attachments', 'File name'),
                     'format' => 'raw',

controllers/FileController.php

@@ -43,14 +43,33 @@ public function actionUpload()
         }
     }
 
-    public function actionDownload($id)
+    /**
+     * Download action for the file
+     * @param integer $id ID of the image to fetch
+     * @param integer $size Optional maximum size of the image. Requires yii2-easy-thumbnail-image-helper
+     * @param bool $crop Optional cropping. Requires yii2-easy-thumbnail-image-helper
+     * @return static Image data
+     */
+    public function actionDownload($id, $size = NULL, $crop = FALSE)
     {
+        if (!is_null($size) && $this->getModule()->checkResizeRequirements() == FALSE)
+            throw new \Exception("You need himiklab/yii2-easy-thumbnail-image-helper for image resize features");
+
         $file = File::findOne(['id' => $id]);
         $filePath = $this->getModule()->getFilesDirPath($file->hash) . DIRECTORY_SEPARATOR . $file->hash . '.' . $file->type;
+
+        // Resize if requested
+        if (!is_null($size) && $file->isImage) {
+            $filePath = \himiklab\thumbnail\EasyThumbnailImage::thumbnailFile(
+                    $filePath, 
+                    $size, 
+                    $size, 
+                    $crop ? \himiklab\thumbnail\EasyThumbnailImage::THUMBNAIL_OUTBOUND : \himiklab\thumbnail\EasyThumbnailImage::THUMBNAIL_INSET);
+        }
 
         return \Yii::$app->response->sendFile($filePath, "$file->name.$file->type");
     }
-
+    
     public function actionDelete($id)
     {
         $this->getModule()->detachFile($id);

models/File.php

@@ -18,6 +18,8 @@
  * @property integer $size
  * @property string $type
  * @property string $mime
+ * 
+ * @property boolean $isImage Returns TRUE if the file's mime type is image/*
  */
 class File extends ActiveRecord
 {
@@ -69,4 +71,10 @@ public function getPath()
     {
         return $this->getModule()->getFilesDirPath($this->hash) . DIRECTORY_SEPARATOR . $this->hash . '.' . $this->type;
     }
+
+    public function getIsImage()
+    {
+        return preg_match('/image\/.*/', $this->mime);
+    }
+
 }