From c1f266db886cb6ff87e81af1b47da7f5f70966f9 Mon Sep 17 00:00:00 2001
From: Joas Schilling <nickvergessen@owncloud.com>
Date: Thu, 12 Mar 2015 11:59:45 +0100
Subject: [PATCH] Add an interface for the preview providers

---
 lib/private/preview.php          |  2 +-
 lib/private/preview/provider.php |  4 +++-
 lib/private/previewmanager.php   |  9 +++----
 lib/public/preview/iprovider.php | 41 ++++++++++++++++++++++++++++++++
 4 files changed, 50 insertions(+), 6 deletions(-)
 create mode 100644 lib/public/preview/iprovider.php

diff --git a/lib/private/preview.php b/lib/private/preview.php
index ced76c14d17..cb3554fa1e9 100644
--- a/lib/private/preview.php
+++ b/lib/private/preview.php
@@ -509,7 +509,7 @@ class Preview {
 
 				foreach ($providers as $closure) {
 					$provider = $closure();
-					if (!($provider instanceof \OC\Preview\Provider)) {
+					if (!($provider instanceof \OCP\Preview\IProvider)) {
 						continue;
 					}
 
diff --git a/lib/private/preview/provider.php b/lib/private/preview/provider.php
index 34c61307238..bfabc7ad4b3 100644
--- a/lib/private/preview/provider.php
+++ b/lib/private/preview/provider.php
@@ -1,7 +1,9 @@
 <?php
 namespace OC\Preview;
 
-abstract class Provider {
+use OCP\Preview\IProvider;
+
+abstract class Provider implements IProvider {
 	private $options;
 
 	public function __construct($options) {
diff --git a/lib/private/previewmanager.php b/lib/private/previewmanager.php
index fca1000c938..732681c78e7 100644
--- a/lib/private/previewmanager.php
+++ b/lib/private/previewmanager.php
@@ -8,8 +8,9 @@
  */
 namespace OC;
 
-use OCP\image;
+use OCP\Image;
 use OCP\IPreview;
+use OCP\Preview\IProvider;
 
 class PreviewManager implements IPreview {
 	/** @var array */
@@ -29,7 +30,7 @@ class PreviewManager implements IPreview {
 	 * In order to improve lazy loading a closure can be registered which will be
 	 * called in case preview providers are actually requested
 	 *
-	 * $callable has to return an instance of \OC\Preview\Provider
+	 * $callable has to return an instance of \OCP\Preview\IProvider
 	 *
 	 * @param string $mimeTypeRegex Regex with the mime types that are supported by this provider
 	 * @param \Closure $callable
@@ -119,11 +120,11 @@ class PreviewManager implements IPreview {
 			if (preg_match($supportedMimeType, $file->getMimetype())) {
 				foreach ($providers as $closure) {
 					$provider = $closure();
-					if (!($provider instanceof \OC\Preview\Provider)) {
+					if (!($provider instanceof IProvider)) {
 						continue;
 					}
 
-					/** @var $provider \OC\Preview\Provider */
+					/** @var $provider IProvider */
 					if ($provider->isAvailable($file)) {
 						return true;
 					}
diff --git a/lib/public/preview/iprovider.php b/lib/public/preview/iprovider.php
new file mode 100644
index 00000000000..96bde3d5a26
--- /dev/null
+++ b/lib/public/preview/iprovider.php
@@ -0,0 +1,41 @@
+<?php
+/**
+ * ownCloud
+ *
+ * @author Joas Schilling
+ * @copyright 2015 Joas Schilling nickvergessen@owncloud.com
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+namespace OCP\Preview;
+
+interface IProvider {
+	/**
+	 * @return string Regex with the mimetypes that are supported by this provider
+	 */
+	public function getMimeType();
+
+	/**
+	 * Check if a preview can be generated for $path
+	 *
+	 * @param \OCP\Files\FileInfo $file
+	 * @return bool
+	 */
+	public function isAvailable($file);
+
+	/**
+	 * get thumbnail for file at path $path
+	 *
+	 * @param string $path Path of file
+	 * @param int $maxX The maximum X size of the thumbnail. It can be smaller depending on the shape of the image
+	 * @param int $maxY The maximum Y size of the thumbnail. It can be smaller depending on the shape of the image
+	 * @param bool $scalingup Disable/Enable upscaling of previews
+	 * @param \OC\Files\View $fileview fileview object of user folder
+	 * @return mixed
+	 *        false if no preview was generated
+	 *        OC_Image object of the preview
+	 */
+	public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview);
+}
-- 
2.39.5