Add altColorId support to PetAppearance

src/server/types/Pet.js

@@ -33,12 +33,12 @@ const resolvers = {
         return null;
       }
 
-      // Neopets may omit this field entirely; treat "missing" as null.
-      const altStyleId = customPetData.custom_pet.alt_style ?? null;
+      const speciesId = customPetData.custom_pet.species_id;
+      const baseColorId = customPetData.custom_pet.color_id;
 
       const petType = await petTypeBySpeciesAndColorLoader.load({
-        speciesId: customPetData.custom_pet.species_id,
-        colorId: customPetData.custom_pet.color_id,
+        speciesId,
+        colorId: baseColorId,
       });
       const petStates = petType
         ? await petStatesForPetTypeLoader.load(petType.id)
@@ -55,8 +55,33 @@ const resolvers = {
         .sort((a, b) => Number(a) - Number(b))
         .join(",");
       petState = petStates.find((ps) => ps.swfAssetIds === swfAssetIdsString);
+
+      // Neopets may omit these fields entirely; treat "missing" as null.
+      const altStyleId = customPetData.custom_pet.alt_style;
+      const altColorId = customPetData.custom_pet.alt_color;
+
       if (petState) {
-        return { id: petState.id, altStyleId };
+        return { id: petState.id, altStyleId, altColorId };
+      }
+
+      // If that didn't work, and Neopets reported an alt color, try looking up
+      // the same exact-assets pet state on the species+altColor pair.
+      if (altColorId != null && altColorId !== baseColorId) {
+        const altColorPetType = await petTypeBySpeciesAndColorLoader.load({
+          speciesId,
+          colorId: altColorId,
+        });
+        if (altColorPetType) {
+          const altColorPetStates = await petStatesForPetTypeLoader.load(
+            altColorPetType.id,
+          );
+          const altColorPetState = altColorPetStates.find(
+            (ps) => ps.swfAssetIds === swfAssetIdsString,
+          );
+          if (altColorPetState) {
+            return { id: altColorPetState.id, altStyleId, altColorId };
+          }
+        }
       }
 
       // Next, look for a pet state matching the same pose. (This can happen if
@@ -74,7 +99,7 @@ const resolvers = {
               `because it matches pose ${pose}. Actual pet state for these ` +
               `assets not found: ${swfAssetIdsString}`,
           );
-          return { id: petState.id, altStyleId };
+          return { id: petState.id, altStyleId, altColorId };
         }
       }
 
@@ -88,7 +113,7 @@ const resolvers = {
             `as an UNKNOWN fallback pose. Actual pet state for these ` +
             `assets not found: ${swfAssetIdsString}`,
         );
-        return { id: petState.id, altStyleId };
+        return { id: petState.id, altStyleId, altColorId };
       }
 
       // If we still don't have a pet state, raise an error. (This can happen

src/server/types/PetAppearance.js

@@ -84,6 +84,12 @@ const typeDefs = gql`
     """
     altStyleId: ID
 
+    """
+    The ID of the alt color used to render this appearance, if any.
+    Null when this appearance is not using an alt style.
+    """
+    altColorId: ID
+
     species: Species!
     color: Color!
     pose: Pose!
@@ -279,6 +285,7 @@ const resolvers = {
   },
 
   PetAppearance: {
+    altColorId: ({ altColorId }) => (altColorId),
     id: ({ id, altStyleId }) => {
       if (altStyleId != null) {
         return `${id}-with-alt-style-${altStyleId}`;