Upload files directly to models when RAG is disabled

Reused the image handling functions, as the mime type was already being
set correctly.

For now the upload only happens if RAG is disabled. A better approach
would be to re-use the agents menu for deciding context vs RAG

api/server/services/Files/Local/images.js

@@ -91,13 +91,11 @@ function encodeImage(imagePath) {
  * @returns {Promise<[MongoFile, string]>} - A promise that resolves to an array of results from updateFile and encodeImage.
  */
 async function prepareImagesLocal(req, file) {
-  const { publicPath, imageOutput } = req.app.locals.paths;
-  const userPath = path.join(imageOutput, req.user.id);
+  const { publicPath, root } = req.app.locals.paths;
 
-  if (!fs.existsSync(userPath)) {
-    fs.mkdirSync(userPath, { recursive: true });
-  }
-  const filepath = path.join(publicPath, file.filepath);
+  const startPath = file.width ? publicPath : root;
+
+  const filepath = path.join(startPath, file.filepath);
 
   const promises = [];
   promises.push(updateFile({ file_id: file.file_id }));

api/server/services/Files/images/encode.js

@@ -60,7 +60,8 @@ async function encodeAndFormat(req, files, endpoint, mode) {
   for (let file of files) {
     const source = file.source ?? FileSources.local;
 
-    if (!file.height) {
+    if (source == FileSources.vectordb) {
+      // Do not try to base-64 encode the file if RAG needs to be performed
       promises.push([file, null]);
       continue;
     }

api/server/services/Files/process.js

@@ -379,9 +379,13 @@ const uploadImageBuffer = async ({ req, context, metadata = {}, resize = true })
  */
 const processFileUpload = async ({ req, res, metadata }) => {
   const isAssistantUpload = isAssistantsEndpoint(metadata.endpoint);
+  const has_rag = !!process.env.RAG_API_URL;
   const assistantSource =
     metadata.endpoint === EModelEndpoint.azureAssistants ? FileSources.azure : FileSources.openai;
-  const source = isAssistantUpload ? assistantSource : FileSources.vectordb;
+  const localSource = has_rag ? FileSources.vectordb : req.app.locals.fileStrategy;
+
+  const source = isAssistantUpload ? assistantSource : localSource;
+
   const { handleFileUpload } = getStrategyFunctions(source);
   const { file_id, temp_file_id } = metadata;