Add methods to move an image up and down.

diff --git a/src/main/java/net/pterodactylus/sone/data/Album.java b/src/main/java/net/pterodactylus/sone/data/Album.java
index 7d10e72..ab5822b 100644 (file)
--- a/src/main/java/net/pterodactylus/sone/data/Album.java
+++ b/src/main/java/net/pterodactylus/sone/data/Album.java
@@ -208,6 +208,40 @@ public class Album implements Fingerprintable {
        }
 
        /**
+        * Moves the given image up in this album’s images. If the image is already
+        * the first image, nothing happens.
+        *
+        * @param image
+        *            The image to move up
+        */
+       public void moveImageUp(Image image) {
+               Validation.begin().isNotNull("Image", image).check().isEqual("Image Album", image.getAlbum(), this).isEqual("Album Owner", image.getAlbum().getSone(), sone).check();
+               int oldIndex = imageIds.indexOf(image.getId());
+               if (oldIndex <= 0) {
+                       return;
+               }
+               imageIds.remove(image.getId());
+               imageIds.add(oldIndex - 1, image.getId());
+       }
+
+       /**
+        * Move the given image down in this album’s images. If the image is already
+        * the last image, nothing happens.
+        *
+        * @param image
+        *            The image to move down
+        */
+       public void moveImageDown(Image image) {
+               Validation.begin().isNotNull("Image", image).check().isEqual("Image Album", image.getAlbum(), this).isEqual("Album Owner", image.getAlbum().getSone(), sone).check();
+               int oldIndex = imageIds.indexOf(image.getId());
+               if ((oldIndex == -1) || (oldIndex >= (imageIds.size() - 1))) {
+                       return;
+               }
+               imageIds.remove(image.getId());
+               imageIds.add(oldIndex + 1, image.getId());
+       }
+
+       /**
         * Returns the album image of this album, or {@code null} if no album image
         * has been set.
         *