1 files changed, 86 insertions, 0 deletions
diff --git a/src/php/lib/Grpc/Interceptor.php b/src/php/lib/Grpc/Interceptor.php
new file mode 100644
index 0000000000..9c1b5616f2
--- /dev/null
+++ b/src/php/lib/Grpc/Interceptor.php
@@ -0,0 +1,86 @@
+<?php
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+namespace Grpc;
+
+/**
+ * Represents an interceptor that intercept RPC invocations before call starts.
+ * This is an EXPERIMENTAL API.
+ */
+class Interceptor
+{
+    public function interceptUnaryUnary(
+        $method,
+        $argument,
+        array $metadata = [],
+        array $options = [],
+        $continuation
+    ) {
+        return $continuation($method, $argument, $metadata, $options);
+    }
+
+    public function interceptStreamUnary(
+        $method,
+        array $metadata = [],
+        array $options = [],
+        $continuation
+    ) {
+        return $continuation($method, $metadata, $options);
+    }
+
+    public function interceptUnaryStream(
+        $method,
+        $argument,
+        array $metadata = [],
+        array $options = [],
+        $continuation
+    ) {
+        return $continuation($method, $argument, $metadata, $options);
+    }
+
+    public function interceptStreamStream(
+        $method,
+        array $metadata = [],
+        array $options = [],
+        $continuation
+    ) {
+        return $continuation($method, $metadata, $options);
+    }
+
+    /**
+     * Intercept the methods with Channel
+     *
+     * @param Channel|InterceptorChannel $channel An already created Channel or InterceptorChannel object (optional)
+     * @param Interceptor|Interceptor[] $interceptors interceptors to be added
+     *
+     * @return InterceptorChannel
+     */
+    public static function intercept($channel, $interceptors)
+    {
+        if (is_array($interceptors)) {
+            for ($i = count($interceptors) - 1; $i >= 0; $i--) {
+                $channel = new InterceptorChannel($channel, $interceptors[$i]);
+            }
+        } else {
+            $channel =  new InterceptorChannel($channel, $interceptors);
+        }
+        return $channel;
+    }
+}
+