From 2d17301642af655ff080a6deec2c223196212811 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tim=20D=C3=BCsterhus?= <duesterhus@woltlab.com>
Date: Fri, 29 Mar 2019 15:38:20 +0100
Subject: [PATCH] Add ImageResizer#loadFile

---
 .../js/WoltLabSuite/Core/ImageResizer.js      | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/wcfsetup/install/files/js/WoltLabSuite/Core/ImageResizer.js b/wcfsetup/install/files/js/WoltLabSuite/Core/ImageResizer.js
index 6a914e6d0b..d572ea29ed 100644
--- a/wcfsetup/install/files/js/WoltLabSuite/Core/ImageResizer.js
+++ b/wcfsetup/install/files/js/WoltLabSuite/Core/ImageResizer.js
@@ -105,6 +105,47 @@ define([
 				});
 		},
 		
+		/**
+		 * Loads the given file into an image object and parses Exif information.
+		 * 
+		 * @param   {File}    file the file to load
+		 * @returns {Promise} resulting image data
+		 */
+		loadFile: function (file) {
+			var exif = undefined;
+			if (file.type === 'image/jpeg') {
+				// Extract EXIF data
+				exif = ExifUtil.getExifBytesFromJpeg(file);
+			}
+			
+			var loader = new Promise(function (resolve, reject) {
+				var reader = new FileReader();
+				var image = new Image();
+				
+				reader.addEventListener('load', function () {
+					image.src = reader.result;
+				});
+				
+				reader.addEventListener('error', function () {
+					reader.abort();
+					reject(reader.error);
+				});
+				
+				image.addEventListener('error', reject);
+				
+				image.addEventListener('load', function () {
+					resolve(image);
+				});
+				
+				reader.readAsDataURL(file);
+			});
+			
+			return Promise.all([ exif, loader ])
+				.then(function (result) {
+					return { exif: result[0], image: result[1] };
+				});
+		},
+		
 		/**
 		 * Downscales an image given as File object.
 		 *
-- 
2.20.1