1 files changed, 33 insertions, 0 deletions
diff --git a/FireBase/Query/AuthQuery.cs b/FireBase/Query/AuthQuery.cs
new file mode 100644
index 0000000..8a8d3e8
--- /dev/null
+++ b/FireBase/Query/AuthQuery.cs
@@ -0,0 +1,33 @@
+namespace Firebase.Database.Query
+{
+    using System;
+
+    /// <summary>
+    /// Represents an auth parameter in firebase query, e.g. "?auth=xyz".
+    /// </summary>
+    public class AuthQuery : ParameterQuery
+    {
+        private readonly Func<string> tokenFactory;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AuthQuery"/> class.
+        /// </summary>
+        /// <param name="parent"> The parent.  </param>  
+        /// <param name="tokenFactory"> The authentication token factory. </param>
+        /// <param name="client"> The owner. </param>
+        public AuthQuery(FirebaseQuery parent, Func<string> tokenFactory, FirebaseClient client) : base(parent, () => client.Options.AsAccessToken ? "access_token" : "auth", client)
+        {
+            this.tokenFactory = tokenFactory;
+        }
+
+        /// <summary>
+        /// Build the url parameter value of this child. 
+        /// </summary>
+        /// <param name="child"> The child of this child. </param>
+        /// <returns> The <see cref="string"/>. </returns>
+        protected override string BuildUrlParameter(FirebaseQuery child)
+        {
+            return this.tokenFactory();
+        }
+    }
+}