Add CLI for Directly Invoking IDL APIs

Initial implementation supports IVibrator only.

Test: Manual Execution
Change-Id: Iaaa2593e7926dc202a89a59c111869cd65f31332
Signed-off-by: Harpreet \"Eli\" Sangha <eliptus@google.com>
diff --git a/cmds/idlcli/vibrator/CommandSetExternalControl.cpp b/cmds/idlcli/vibrator/CommandSetExternalControl.cpp
new file mode 100644
index 0000000..5fb1fac
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandSetExternalControl.cpp
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project *
+ * 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.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+class CommandSetExternalControl : public Command {
+    std::string getDescription() const override {
+        return "Enable/disable vibration external control.";
+    }
+
+    std::string getUsageSummary() const override { return "<enable>"; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{
+                {"<enable>", {"0/1."}},
+        };
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (auto enable = args.pop<decltype(mEnable)>()) {
+            mEnable = *enable;
+        } else {
+            std::cerr << "Missing Enable!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        auto ret = halCall(&V1_3::IVibrator::setExternalControl, mEnable);
+
+        if (!ret.isOk()) {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Status: " << toString(ret) << std::endl;
+
+        return ret == V1_0::Status::OK ? OK : ERROR;
+    }
+
+    bool mEnable;
+};
+
+static const auto Command =
+        CommandRegistry<CommandVibrator>::Register<CommandSetExternalControl>("setExternalControl");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android