Now with cleaner participants in the responses

ref #6

src/models/responses/ResponseUserGroup.ts

@@ -0,0 +1,45 @@
+import {
+    IsArray,
+
+
+    IsNotEmpty,
+
+    IsOptional,
+    IsString
+} from "class-validator";
+import { Permission } from '../entities/Permission';
+import { UserGroup } from '../entities/UserGroup';
+import { ResponsePrincipal } from './ResponsePrincipal';
+
+/**
+ * Defines a user response.
+*/
+export class ResponseUserGroup extends ResponsePrincipal {
+    /**
+     * The group's name
+     */
+    @IsNotEmpty()
+    @IsString()
+    name: string;
+
+    /**
+     * The group's description
+     */
+    @IsOptional()
+    @IsString()
+    description?: string;
+
+    /**
+     * permissions
+     */
+    @IsArray()
+    @IsOptional()
+    permissions: Permission[];
+
+    public constructor(group: UserGroup) {
+        super(group);
+        this.name = group.name;
+        this.description = group.description;
+        this.permissions = group.permissions;
+    }
+}