From 696a3ff89e43eba2efe527d5a37168f594a43769 Mon Sep 17 00:00:00 2001
From: Simon Garner <simon.garner@madscience.co.nz>
Date: Fri, 14 Jan 2022 07:22:51 +1300
Subject: [PATCH] Add ImageManipulator.rotate method

---
 src/ImageManipulator.spec.ts | 11 +++++++++++
 src/ImageManipulator.ts      |  8 +++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/ImageManipulator.spec.ts b/src/ImageManipulator.spec.ts
index 5ca530a5..cb87cfbf 100644
--- a/src/ImageManipulator.spec.ts
+++ b/src/ImageManipulator.spec.ts
@@ -24,6 +24,17 @@ test('can resize an image', async () => {
   expect(metadata.height).toBe(400);
 });
 
+test('can rotate an image', async () => {
+  const manipulator = new ImageManipulator(fs.readFileSync(path.join(__dirname, 'test-image.png')));
+  const rotatedImage = await manipulator.rotate(90).toBuffer();
+  const metadata = await new ImageManipulator(rotatedImage).readMetadata();
+
+  expect(metadata.mimeType).toBe('image/png');
+  expect(metadata.format).toBe('png');
+  expect(metadata.width).toBe(800);
+  expect(metadata.height).toBe(1280);
+});
+
 test('can apply blur effect to an image', async () => {
   const manipulator = new ImageManipulator(fs.readFileSync(path.join(__dirname, 'test-image.png')));
   const blurredImage = await manipulator.blur(20).toBuffer();
diff --git a/src/ImageManipulator.ts b/src/ImageManipulator.ts
index 61a6c422..f11e82c0 100644
--- a/src/ImageManipulator.ts
+++ b/src/ImageManipulator.ts
@@ -1,5 +1,5 @@
 import { Duplex, Readable } from 'stream';
-import sharp, { JpegOptions, Metadata, PngOptions, Sharp, WebpOptions } from 'sharp';
+import sharp, { JpegOptions, Metadata, PngOptions, RotateOptions, Sharp, WebpOptions } from 'sharp';
 import { ImageMetadata } from './ImageMetadata';
 import { ImageDimensions } from './ImageDimensions';
 import { ImageMimeType } from './ImageMimeType';
@@ -103,6 +103,12 @@ export class ImageManipulator {
     return this;
   }
 
+  public rotate(angle?: number, options?: RotateOptions): this {
+    this.image.rotate(angle, options);
+
+    return this;
+  }
+
   public blur(sigma: number | null): this {
     this.image.blur(sigma != null ? sigma : undefined);