FEATURE: make thumbnails from uploaded image

app/Helpers/FileManager.php

@@ -17,12 +17,7 @@ class FileManager
         switch ($type) {
             case 'image':
 
-                // try to check if file have thumbnail
-                if (file_exists(config('app.thumbnail_url') . '/' . $file->filename)) {
-                    $url = config('app.thumbnail_url') . '/' . $file->filename;
-                } else {
-                    $url = config('app.upload_url') . '/' . $file->filename;
-                }
+               $url = Template::thumbnail($file->filename);
 
                 return '<img src="' . $url . '" alt="' . $file->description . '" />';
                 break;

app/Helpers/Template.php

@@ -61,6 +61,18 @@ class Template
         return config('app.upload_url') . '/' . $filename;
     }
 
+    public static function thumbnail($filename)
+    {
+        // try to check if file have thumbnail
+        if (file_exists(config('app.thumbnail_path') . '/' . $filename)) {
+            $url = config('app.thumbnail_url') . '/' . $filename;
+        } else {
+            $url = self::upload($filename);
+        }
+
+        return $url;
+    }
+
     /**
      * Get path to given asset
      *

app/Models/File.php

@@ -4,9 +4,13 @@ namespace App\Models;
 
 use App\Events\UploadFile;
 use App\Http\Requests\Request;
+use Franzose\ClosureTable\Extensions\Str;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Event;
+use Illuminate\Support\Facades\File as FileFacade;
+use Intervention\Image\Constraint;
+use Intervention\Image\Facades\Image;
 use Symfony\Component\HttpFoundation\File\File as SymphonyFile;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 
@@ -63,6 +67,12 @@ class File extends Model
         // save file into physical location (local FS)
         $uploadedFile = $file->move($destination, $filename);
 
+        // is uploaded file an image?
+        if (Str::startsWith($uploadedFile->getMimeType(), 'image')) {
+            // yes, create thumbnail
+            $this->createThumbnail($uploadedFile);
+        }
+
         // insert record into database
         $id = $this->saveIntoDatabase($uploadedFile, $request, $file->getClientOriginalName());
 
@@ -118,4 +128,29 @@ class File extends Model
 
         return $newFile->id;
     }
+
+    /**
+     * Create thumbnail of given image
+     *
+     * @param SymphonyFile $file
+     */
+    private function createThumbnail(SymphonyFile $file)
+    {
+        // does thumbnail directory exist?
+        if (!is_dir(config('app.thumbnail_path'))) {
+            FileFacade::makeDirectory(config('app.thumbnail_path'));
+        }
+
+        // get image instance
+        $image = Image::make(config('app.upload_path') . DIRECTORY_SEPARATOR . $file->getFilename());
+
+        // resize image and keep aspect ration
+        $image->resize(env('THUMBNAIL_WIDTH', 300), null, function (Constraint $constraint) {
+            $constraint->aspectRatio();
+            $constraint->upsize();
+        });
+
+        // save thumbnail with lower quality
+        $image->save(config('app.thumbnail_path') . DIRECTORY_SEPARATOR . $file->getFilename(), 75);
+    }
 }

app/Providers/GlobalViewDataProvider.php

@@ -65,7 +65,7 @@ class GlobalViewDataProvider extends ServiceProvider
             return preg_replace($pattern, $code, $view);
         });
 
-        // shortcut for loading uploaded images
+        // shortcut for loading uploaded files
         Blade::extend(function ($view) {
             $pattern = $this->createPattern('upload');
             $code = '<?php echo \App\Helpers\Template::upload($2); ?>';
@@ -73,6 +73,14 @@ class GlobalViewDataProvider extends ServiceProvider
             return preg_replace($pattern, $code, $view);
         });
 
+        // shortcut for loading thumbnails of uploaded images
+        Blade::extend(function ($view) {
+            $pattern = $this->createPattern('upload');
+            $code = '<?php echo \App\Helpers\Template::thumbnail($2); ?>';
+
+            return preg_replace($pattern, $code, $view);
+        });
+
         // shortcut for displaying Gravatar
         Blade::extend(function ($view) {
             $pattern = $this->createPattern('gravatar');