Allows to use remote images

classes/Image.php

@@ -7,6 +7,8 @@
 
 class Image
 {
+    use RemoteImageTrait;
+
     /**
      * Original path of image
      */
@@ -53,6 +55,11 @@ public function __construct($filePath = false)
             return;
         }
 
+        // If file path is a remote image, download and use as local file
+        if ($this->isRemoteFile($filePath)) {
+            $filePath = $this->getRemoteFile($filePath);
+        }
+
         $this->file->file_name = $filePath;
 
         $this->filePath = (file_exists($filePath))

classes/RemoteImageTrait.php

@@ -0,0 +1,126 @@
+<?php
+
+namespace ToughDeveloper\ImageResizer\Classes;
+
+use File as FileHelper;
+use October\Rain\Network\Http;
+use October\Rain\Database\Attach\File;
+use Illuminate\Support\Facades\Storage;
+
+trait RemoteImageTrait
+{
+    /**
+     * Determine if a file path is a remote image
+     *
+     * @param string $filePath
+     * @return boolean
+     */
+    protected function isRemoteFile($filePath)
+    {
+        return filter_var($filePath, FILTER_VALIDATE_URL);
+    }
+
+    /**
+     * Store a remote image locally
+     *
+     * @param string $filePath
+     * @return string
+     */
+    protected function getRemoteFile($filePath)
+    {
+        $tempImage = $this->generateStoragePath($filePath);
+        $tempFullPath = storage_path('app/' . $tempImage);
+
+        // Check if remote image was already downloaded
+        if (Storage::exists($tempImage)) {
+            return $tempFullPath;
+        }
+
+        // If URL doesn't have extension, check if exists a file with one of the allowed extensions
+        $imageExists = $this->checkLocalRemoteImage($tempImage);
+
+        // If found, use already downloaded image
+        if ($imageExists) {
+            return storage_path('app/' . $imageExists);
+        }
+
+        // Download image from remote location
+        Http::get($filePath, function ($http) use ($tempFullPath) {
+            $http->toFile($tempFullPath);
+        });
+
+        // If URL doesn't have extension, discover extension and rename local image
+        if (!FileHelper::extension($tempFullPath)) {
+            $extension = $this->discoverImageExtension($tempFullPath);
+            $newFullPath = sprintf('%s%s', $tempFullPath, $extension);
+            rename($tempFullPath, $newFullPath);
+            $tempFullPath = $newFullPath;
+        }
+
+        return $tempFullPath;
+    }
+
+    /**
+     * Generate storage path to store cached remote images
+     *
+     * @param string $filePath
+     * @return string
+     */
+    protected function generateStoragePath($filePath)
+    {
+        $extension = $this->getRemoteFileExtension($filePath);
+        $tempPath = $this->file->getStorageDirectory() . $this->getPartitionDirectory();
+        $tempFilename = md5($filePath);
+
+        Storage::makeDirectory($tempPath);
+
+        $fileMask = $extension ? '%s%s.%s' : '%s%s';
+
+        return sprintf($fileMask, $tempPath, $tempFilename, $extension);
+    }
+
+    /**
+     * Get file extension from remote image URL
+     *
+     * @param string $filePath
+     * @return string
+     */
+    protected function getRemoteFileExtension($filePath)
+    {
+        // Remove query string from url
+        if (parse_url($filePath, PHP_URL_QUERY)) {
+            $filePath = strtok($filePath, '?');
+        }
+
+        return FileHelper::extension($filePath);
+    }
+
+    /**
+     * If remote image doesn't expose file extension, discover by looking downloaded file
+     *
+     * @param string $filePath
+     * @return string
+     */
+    protected function discoverImageExtension($filePath)
+    {
+        $imageType = exif_imagetype($filePath);
+        $extension = image_type_to_extension($imageType);
+        return $extension;
+    }
+
+    /**
+     * If URL doesn't have extension, check if exists a file with one of the allowed extensions
+     *
+     * @param $string $filePath
+     * @return Collection
+     */
+    protected function checkLocalRemoteImage($filePath)
+    {
+        $allowedExtensions = File::$imageExtensions;
+
+        return collect($allowedExtensions)->map(function ($imageType) use ($filePath) {
+            $findImage = sprintf('%s.%s', $filePath, $imageType);
+            return Storage::exists($findImage) ? $findImage : false;
+        })->filter()->first();
+    }
+}