Download unprocessed gallery picture

Resolves #558

app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRedditGalleryImageOrGifFragment.java

@@ -96,6 +96,7 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
     private String subredditName;
     private boolean isDownloading = false;
     private boolean isActionBarHidden = false;
+    private boolean isFallback = false;
 
     public ViewRedditGalleryImageOrGifFragment() {
         // Required empty public constructor
@@ -162,6 +163,21 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
                             view.setQuickScaleEnabled(true);
                             view.resetScaleAndCenter();
                         }
+
+                        @Override
+                        public void onImageLoadError(Exception e) {
+                            e.printStackTrace();
+                            // For issue #558
+                            // Make sure it's not stuck in a loop if it comes to that
+                            // Fallback url should be empty if it's not an album item
+                            if (!isFallback && media.hasFallback()) {
+                                imageView.cancel();
+                                isFallback = true;
+                                loadImage();
+                            } else {
+                                isFallback = false;
+                            }
+                        }
                     });
                 }
             }
@@ -238,7 +254,12 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
     }
 
     private void loadImage() {
-        imageView.showImage(Uri.parse(media.url));
+        if(isFallback) {
+            imageView.showImage(Uri.parse(media.fallbackUrl));
+        }
+        else{
+            imageView.showImage(Uri.parse(media.url));
+        }
     }
 
     @Override
@@ -295,7 +316,7 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
         isDownloading = false;
 
         Intent intent = new Intent(activity, DownloadMediaService.class);
-        intent.putExtra(DownloadMediaService.EXTRA_URL, media.url);
+        intent.putExtra(DownloadMediaService.EXTRA_URL, media.hasFallback() ? media.fallbackUrl : media.url); // Retrieve original instead of the one additionally compressed by reddit
         intent.putExtra(DownloadMediaService.EXTRA_MEDIA_TYPE, media.mediaType == Post.Gallery.TYPE_GIF ? DownloadMediaService.EXTRA_MEDIA_TYPE_GIF: DownloadMediaService.EXTRA_MEDIA_TYPE_IMAGE);
         intent.putExtra(DownloadMediaService.EXTRA_FILE_NAME, media.fileName);
         intent.putExtra(DownloadMediaService.EXTRA_SUBREDDIT_NAME, subredditName);
@@ -303,8 +324,10 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
         Toast.makeText(activity, R.string.download_started, Toast.LENGTH_SHORT).show();
     }
 
+    //TODO: Find a way to share original image, Glide messes with the size and quality,
+    // compression should be up to the app being shared with (WhatsApp for example)
     private void shareImage() {
-        glide.asBitmap().load(media.url).into(new CustomTarget<Bitmap>() {
+        glide.asBitmap().load(media.hasFallback() ? media.fallbackUrl : media.url).into(new CustomTarget<Bitmap>() {
             @Override
             public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {
                 if (activity.getExternalCacheDir() != null) {
@@ -420,7 +443,7 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
         super.onResume();
         SubsamplingScaleImageView ssiv = imageView.getSSIV();
         if (ssiv == null || !ssiv.hasImage()) {
-            imageView.showImage(Uri.parse(media.url));
+            loadImage();
         }
     }
 
@@ -428,6 +451,7 @@ public class ViewRedditGalleryImageOrGifFragment extends Fragment {
     public void onDestroyView() {
         super.onDestroyView();
         imageView.cancel();
+        isFallback = false;
         SubsamplingScaleImageView subsamplingScaleImageView = imageView.getSSIV();
         if (subsamplingScaleImageView != null) {
             subsamplingScaleImageView.recycle();

app/src/main/java/ml/docilealligator/infinityforreddit/post/ParsePost.java

@@ -3,6 +3,7 @@ package ml.docilealligator.infinityforreddit.post;
 import android.net.Uri;
 import android.os.Handler;
 import android.text.Html;
+import android.text.TextUtils;
 
 import org.json.JSONArray;
 import org.json.JSONException;
@@ -563,7 +564,17 @@ public class ParsePost {
                         previews.add(new Post.Preview(galleryItemUrl, singleGalleryObject.getJSONObject(JSONUtils.S_KEY).getInt(JSONUtils.X_KEY),
                                 singleGalleryObject.getJSONObject(JSONUtils.S_KEY).getInt(JSONUtils.Y_KEY)));
                     }
-                    gallery.add(new Post.Gallery(mimeType, galleryItemUrl, subredditName + "-" + galleryId + "." + mimeType.substring(mimeType.lastIndexOf("/") + 1)));
+                    
+                    Post.Gallery postGalleryItem = new Post.Gallery(mimeType, galleryItemUrl, "", subredditName + "-" + galleryId + "." + mimeType.substring(mimeType.lastIndexOf("/") + 1));
+
+                    // For issue #558
+                    // Construct a fallback image url
+                    if(!TextUtils.isEmpty(galleryItemUrl) && !TextUtils.isEmpty(mimeType) && (mimeType.contains("jpg") || mimeType.contains("png"))) {
+                        postGalleryItem.setFallbackUrl("https://i.redd.it/" + galleryId + "." +  mimeType.substring(mimeType.lastIndexOf("/") + 1));
+                        postGalleryItem.setHasFallback(true);
+                    }
+
+                    gallery.add(postGalleryItem);
                 }
 
                 if (!gallery.isEmpty()) {

app/src/main/java/ml/docilealligator/infinityforreddit/post/Post.java

@@ -580,12 +580,15 @@ public class Post implements Parcelable {
 
         public String mimeType;
         public String url;
+        public String fallbackUrl;
+        private boolean hasFallback;
         public String fileName;
         public int mediaType;
 
-        public Gallery(String mimeType, String url, String fileName) {
+        public Gallery(String mimeType, String url, String fallbackUrl, String fileName) {
             this.mimeType = mimeType;
             this.url = url;
+            this.fallbackUrl = fallbackUrl;
             this.fileName = fileName;
             if (mimeType.contains("gif")) {
                 mediaType = TYPE_GIF;
@@ -599,6 +602,8 @@ public class Post implements Parcelable {
         protected Gallery(Parcel in) {
             mimeType = in.readString();
             url = in.readString();
+            fallbackUrl = in.readString();
+            hasFallback = in.readByte() != 0;
             fileName = in.readString();
             mediaType = in.readInt();
         }
@@ -624,9 +629,17 @@ public class Post implements Parcelable {
         public void writeToParcel(Parcel parcel, int i) {
             parcel.writeString(mimeType);
             parcel.writeString(url);
+            parcel.writeString(fallbackUrl);
+            parcel.writeByte((byte) (hasFallback ? 1 : 0));
             parcel.writeString(fileName);
             parcel.writeInt(mediaType);
         }
+
+        public void setFallbackUrl(String fallbackUrl) { this.fallbackUrl = fallbackUrl; }
+
+        public void setHasFallback(boolean hasFallback) { this.hasFallback = hasFallback; }
+
+        public boolean hasFallback() { return this.hasFallback; }
     }
 
     public static class Preview implements Parcelable {