Use fallback images for Giphy results.

src/org/thoughtcrime/securesms/giph/model/ChunkedImageUrl.java

@@ -21,6 +21,7 @@ public class ChunkedImageUrl implements Key {
   }
 
   public ChunkedImageUrl(@NonNull String url, long size) {
+    if (url == null) throw new RuntimeException();
     this.url = url;
     this.size   = size;
   }

src/org/thoughtcrime/securesms/giph/model/GiphyImage.java

@@ -1,27 +1,37 @@
 package org.thoughtcrime.securesms.giph.model;
 
 
+import android.text.TextUtils;
+
+import androidx.annotation.Nullable;
+
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import org.thoughtcrime.securesms.util.Util;
+
 public class GiphyImage {
 
   @JsonProperty
   private ImageTypes images;
 
   public String getGifUrl() {
-    return images.downsized.url;
+    ImageData data = getGifData();
+    return data != null ? data.url : null;
   }
 
   public long getGifSize() {
-    return images.downsized.size;
+    ImageData data = getGifData();
+    return data != null ? data.size : 0;
   }
 
   public String getGifMmsUrl() {
-    return images.fixed_height_downsampled.url;
+    ImageData data = getGifMmsData();
+    return data != null ? data.url : null;
   }
 
   public long getMmsGifSize() {
-    return images.fixed_height_downsampled.size;
+    ImageData data = getGifMmsData();
+    return data != null ? data.size : 0;
   }
 
   public float getGifAspectRatio() {
@@ -29,19 +39,45 @@ public class GiphyImage {
   }
 
   public int getGifWidth() {
-    return images.downsized.width;
+    ImageData data = getGifData();
+    return data != null ? data.width : 0;
   }
 
   public int getGifHeight() {
-    return images.downsized.height;
+    ImageData data = getGifData();
+    return data != null ? data.height : 0;
   }
 
   public String getStillUrl() {
-    return images.downsized_still.url;
+    ImageData data = getStillData();
+    return data != null ? data.url : null;
   }
 
   public long getStillSize() {
-    return images.downsized_still.size;
+    ImageData data = getStillData();
+    return data != null ? data.size : 0;
+  }
+
+  private @Nullable ImageData getGifData() {
+    return getFirstNonEmpty(images.downsized, images.downsized_medium, images.fixed_height, images.fixed_width);
+  }
+
+  private @Nullable ImageData getGifMmsData() {
+    return getFirstNonEmpty(images.fixed_height_downsampled, images.fixed_width_downsampled);
+  }
+
+  private @Nullable ImageData getStillData() {
+    return getFirstNonEmpty(images.downsized_still, images.fixed_height_still, images.fixed_width_still);
+  }
+
+  private static @Nullable ImageData getFirstNonEmpty(ImageData... data) {
+    for (ImageData image : data) {
+      if (!TextUtils.isEmpty(image.url)) {
+        return image;
+      }
+    }
+
+    return null;
   }
 
   public static class ImageTypes {

src/org/thoughtcrime/securesms/giph/net/GiphyLoader.java

@@ -6,6 +6,9 @@ import android.net.Uri;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import android.text.TextUtils;
+
+import com.annimon.stream.Stream;
+
 import org.thoughtcrime.securesms.logging.Log;
 
 
@@ -59,7 +62,11 @@ public abstract class GiphyLoader extends AsyncLoader<List<GiphyImage>> {
       }
 
       GiphyResponse    giphyResponse = JsonUtils.fromJson(response.body().byteStream(), GiphyResponse.class);
-      List<GiphyImage> results       = giphyResponse.getData();
+      List<GiphyImage> results       = Stream.of(giphyResponse.getData())
+                                             .filterNot(g -> TextUtils.isEmpty(g.getGifUrl()))
+                                             .filterNot(g -> TextUtils.isEmpty(g.getGifMmsUrl()))
+                                             .filterNot(g -> TextUtils.isEmpty(g.getStillUrl()))
+                                             .toList();
 
       if (results == null) return new LinkedList<>();
       else                 return results;