feat: support recursive resource listing

src/main/java/com/epam/aidial/core/controller/ResourceController.java

@@ -50,18 +50,20 @@ protected Future<?> handle(ResourceDescription descriptor) {
     private Future<?> getMetadata(ResourceDescription descriptor) {
         String token;
         int limit;
+        boolean recursive;
 
         try {
             token = context.getRequest().getParam("token");
             limit = Integer.parseInt(context.getRequest().getParam("limit", "100"));
+            recursive = Boolean.parseBoolean(context.getRequest().getParam("recursive", "false"));
             if (limit < 0 || limit > 1000) {
                 throw new IllegalArgumentException("Limit is out of allowed range");
             }
         } catch (Throwable error) {
-            return context.respond(HttpStatus.BAD_REQUEST, "Bad query parameters. Limit must be in [0, 1000] range");
+            return context.respond(HttpStatus.BAD_REQUEST, "Bad query parameters. Limit must be in [0, 1000] range. Recursive must be true/false");
         }
 
-        return vertx.executeBlocking(() -> service.getMetadata(descriptor, token, limit))
+        return vertx.executeBlocking(() -> service.getMetadata(descriptor, token, limit, recursive))
                 .onSuccess(result -> {
                     if (result == null) {
                         context.respond(HttpStatus.NOT_FOUND, "Not found: " + descriptor.getUrl());

src/main/java/com/epam/aidial/core/service/ResourceService.java

@@ -104,15 +104,15 @@ public void close() {
     }
 
     @Nullable
-    public MetadataBase getMetadata(ResourceDescription descriptor, String token, int limit) {
+    public MetadataBase getMetadata(ResourceDescription descriptor, String token, int limit, boolean recursive) {
         return descriptor.isFolder()
-                ? getFolderMetadata(descriptor, token, limit)
+                ? getFolderMetadata(descriptor, token, limit, recursive)
                 : getItemMetadata(descriptor);
     }
 
-    private ResourceFolderMetadata getFolderMetadata(ResourceDescription descriptor, String token, int limit) {
+    private ResourceFolderMetadata getFolderMetadata(ResourceDescription descriptor, String token, int limit, boolean recursive) {
         String blobKey = blobKey(descriptor);
-        PageSet<? extends StorageMetadata> set = blobStore.list(blobKey, token, limit);
+        PageSet<? extends StorageMetadata> set = blobStore.list(blobKey, token, limit, recursive);
 
         if (set.isEmpty() && !descriptor.isRootFolder()) {
             return null;

src/main/java/com/epam/aidial/core/storage/BlobStorage.java

@@ -189,11 +189,16 @@ public MetadataBase listMetadata(ResourceDescription resource) {
         }
     }
 
-    public PageSet<? extends StorageMetadata> list(String absoluteFilePath, String afterMarker, int maxResults) {
+    public PageSet<? extends StorageMetadata> list(String absoluteFilePath, String afterMarker, int maxResults, boolean recursive) {
         ListContainerOptions options = new ListContainerOptions()
                 .prefix(absoluteFilePath)
-                .maxResults(maxResults)
-                .delimiter(BlobStorageUtil.PATH_SEPARATOR);
+                .maxResults(maxResults);
+
+        if (recursive) {
+            options.recursive();
+        } else {
+            options.delimiter(BlobStorageUtil.PATH_SEPARATOR);
+        }
 
         if (afterMarker != null) {
             options.afterMarker(afterMarker);

src/test/java/com/epam/aidial/core/ResourceApiTest.java

@@ -131,6 +131,9 @@ void testWorkflow() {
         response = request(HttpMethod.PUT, "/folder/conversation", "12345");
         verifyNotExact(response, 200, "\"url\":\"conversations/3CcedGxCx23EwiVbVmscVktScRyf46KypuBQ65miviST/folder/conversation\"");
 
+        response = metadata("/?recursive=true");
+        verifyNotExact(response, 200, "\"url\":\"conversations/3CcedGxCx23EwiVbVmscVktScRyf46KypuBQ65miviST/folder/conversation\"");
+
         response = request(HttpMethod.PUT, "/folder/conversation", "12345", "if-none-match", "*");
         verifyNotExact(response, 409, "Resource already exists: conversations/3CcedGxCx23EwiVbVmscVktScRyf46KypuBQ65miviST/folder/conversation");