fix: Fix Gif Illustration generation - MEED-7435 - Meeds-io/meeds#2369 (

#641)

Prior to this change, the Gif Image Reader doesn't allow to generate an
illustration with Metadata. This fix will generate the illustration
without Metadata and then write the Metadata in the generated PNG Image.

commons-component-common/src/main/java/org/exoplatform/services/thumbnail/ImageResizeServiceImpl.java

@@ -60,8 +60,6 @@ public byte[] scaleImage(byte[] image,
       return image;
     }
 
-    ImageReader imageReader = getImageReader(image);
-
     if (width == 0) {
       bufferedImage = Scalr.resize(bufferedImage, resizeMethod, Scalr.Mode.FIT_TO_HEIGHT, width, height, Scalr.OP_ANTIALIAS);
     } else if (height == 0) {
@@ -79,9 +77,16 @@ public byte[] scaleImage(byte[] image,
       bufferedImage = Scalr.resize(bufferedImage, resizeMethod, fitMode, width, height, Scalr.OP_ANTIALIAS);
     }
 
+    ImageReader imageReader = getImageReader(image);
     byte[] response = toByteArray(bufferedImage, imageReader);
+    if (response.length == 0) {
+      response = toByteArray(bufferedImage);
+      // Use PNG Image Readear instead of Gif
+      imageReader = getImageReader(response);
+      response = toByteArray(bufferedImage, imageReader);
+    }
 
-    if (!fitExact && response.length > image.length) {
+    if (!fitExact && (response.length == 0 || response.length > image.length)) {
       // if the original image is smaller in weight from the resized image, we
       // must keep the original image
       return image;
@@ -119,4 +124,10 @@ private byte[] toByteArray(BufferedImage targetBufferedImage, ImageReader source
     return byteArrayOutputStream.toByteArray();
   }
 
+  private byte[] toByteArray(BufferedImage bufferedImage) throws IOException {
+    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+    ImageIO.write(bufferedImage, "png", byteArrayOutputStream);
+    return byteArrayOutputStream.toByteArray();
+  }
+
 }