Created a mimetype message and added it to ListSupportedMimeTypesResp…

…onse

cs3/app/registry/v1beta1/registry_api.proto

@@ -136,8 +136,11 @@ message ListSupportedMimeTypesResponse {
   // Opaque information.
   cs3.types.v1beta1.Opaque opaque = 2;
   // REQUIRED.
-  // The list of supported mime types with the apps which they can be opened with.
-  map<string, AppProviderList> mime_types = 3;
+  // The list of supported mime types and their properties.
+  MimeTypeList mime_types = 3;
+  // REQUIRED.
+  // The list of supported apps indexed by mime type.
+  map<string, AppProviderList> apps = 4;
 }
 
 message GetDefaultAppProviderForMimeTypeRequest {

cs3/app/registry/v1beta1/resources.proto

@@ -72,3 +72,24 @@ message ProviderInfo {
 message AppProviderList {
   repeated ProviderInfo app_providers = 1;
 }
+
+// Represents a mime type and its corresponding file extension.
+message MimeType {
+  // OPTIONAL.
+  // Opaque information.
+  cs3.types.v1beta1.Opaque opaque = 1;
+  // REQUIRED.
+  // The mime type.
+  string mime_type = 2;
+  // REQUIRED.
+  // The friendly name of this mime type.
+  string name = 3;
+  // REQUIRED.
+  // The file extension mapped to this mime type.
+  string ext = 4;
+}
+
+// Holds a list of mime types.
+message MimeTypeList {
+  repeated MimeType mime_types = 1;
+}