CELE-109 Fixes screen flash with 3D viewer

The problem of flash came from the fact that, depending on the dataset,
the data couldn't be fetch. When that was the case, none of the scene
was rendered, even if only one file couldn't be loaded. This commit
changes the way the 3D images are loaded, and shows an error message to
inform the user if one of the 3D images cannot be displayed (the other
images for the requested neurons are displayed if they exists in the
bucket).

applications/visualizer/frontend/src/components/viewers/ThreeD/DatasetPicker.tsx

@@ -23,7 +23,7 @@ const DatasetPicker: React.FC<DatasetPickerProps> = ({ datasets, selectedDataset
       onChange={(newValue) => onDatasetChange(newValue)}
       getOptionLabel={(option: Dataset) => option.name}
       renderOption={(props, option) => (
-        <li {...props}>
+        <li {...props} key={`3Dviewer_dataset_${option.name}`}>
           <CheckIcon />
           <Typography>{option.name}</Typography>
         </li>

applications/visualizer/frontend/src/components/viewers/ThreeD/STLViewer.tsx

@@ -1,8 +1,8 @@
 import { Center } from "@react-three/drei";
-import { useLoader } from "@react-three/fiber";
-import type { FC } from "react";
-import type { BufferGeometry } from "three";
+import { type FC, useMemo, useState } from "react";
 import { STLLoader } from "three/examples/jsm/loaders/STLLoader";
+import { useGlobalContext } from "../../../contexts/GlobalContext.tsx";
+import { GlobalError } from "../../../models/Error.ts";
 import STLMesh from "./STLMesh.tsx";
 import type { Instance } from "./ThreeDViewer.tsx";
 
@@ -12,12 +12,48 @@ interface Props {
 }
 
 const STLViewer: FC<Props> = ({ instances, isWireframe }) => {
-  // TODO: Check if useLoader caches or do we need to do it ourselves
-  // @ts-expect-error Argument type STLLoader is not assignable to parameter type LoaderProto<T>
-  const stlObjects = useLoader<STLLoader, BufferGeometry[]>(
-    STLLoader,
-    instances.map((i) => i.url),
-  );
+  const { handleErrors } = useGlobalContext();
+  const [stlObjects, setSTLObjects] = useState([]);
+
+  useMemo(() => {
+    const loader = new STLLoader();
+
+    const errorFiles = [];
+
+    // Load all STL files in parallel
+    const loadSTLFiles = async () => {
+      const loadPromises = instances.map(
+        (instance) =>
+          new Promise((resolve, _) => {
+            loader.load(
+              instance.url,
+              (geometry) => resolve(geometry.center()),
+              undefined,
+              (error) => {
+                console.error(`Error loading ${instance.url}:`, error);
+                errorFiles.push(instance);
+                resolve(null);
+              },
+            );
+          }),
+      );
+      // Wait for all promises to finish
+      const results = await Promise.allSettled(loadPromises);
+
+      // We filter now all the promises that didn't finish properly
+      // @ts-expect-error
+      const successfulModels = results.filter((result) => result.status === "fulfilled" && result.value).map((result) => result.value);
+
+      setSTLObjects(successfulModels);
+
+      // If there is some error, we display a message to inform the user
+      if (errorFiles.length > 0) {
+        handleErrors(new GlobalError(`Couldn't fetch 3D representation for ${errorFiles.map((e) => e.id)}`));
+      }
+    };
+
+    loadSTLFiles();
+  }, [instances]);
 
   return (
     <Center>
@@ -26,7 +62,6 @@ const STLViewer: FC<Props> = ({ instances, isWireframe }) => {
           <STLMesh
             key={instances[idx].id}
             id={instances[idx].id}
-            // @ts-expect-error Type 'ConditionalType<LoaderReturnType<T, L>, GLTFLike, LoaderReturnType<T, L> & ObjectMap, LoaderReturnType<T, L>>' is not assignable to type 'BufferGeometry<NormalBufferAttributes>'.
             stl={stl}
             opacity={instances[idx].opacity}
             color={instances[idx].color}

applications/visualizer/frontend/src/components/viewers/ThreeD/ThreeDViewer.tsx

@@ -61,12 +61,15 @@ function ThreeDViewer() {
       const viewerData = workspace.visibilities[neuronId]?.[ViewerType.ThreeD];
       const urls = getNeuronUrlForDataset(neuron, selectedDataset.id);
 
-      return urls.map((url, index) => ({
-        id: `${neuronId}-${index}`,
-        url: `${OpenAPI.BASE}/${url}`,
-        color: viewerData?.color || "#FFFFFF",
-        opacity: 1,
-      }));
+      return urls.map((url) => {
+        const neuronName = url.match(/([^/]+)(\.[^/]*)?$/)?.[1].replace(/(\.[^/]*)?$/, "");
+        return {
+          id: `${neuronName}`,
+          url,
+          color: viewerData?.color || "#FFFFFF",
+          opacity: 1,
+        };
+      });
     });
 
     setInstances(newInstances);

applications/visualizer/frontend/src/contexts/GlobalContext.tsx

@@ -103,10 +103,10 @@ export const GlobalContextProvider: React.FC<GlobalContextProviderProps> = ({ ch
   };
 
   const handleErrors = (error: Error) => {
-    if (error instanceof GlobalError) {
-      setErrorMessage(error.message);
-      setOpenErrorAlert(true);
-    }
+    // if (error instanceof GlobalError) {
+    setErrorMessage(error.message);
+    setOpenErrorAlert(true);
+    // }
   };
 
   const serializeGlobalContext = () => {