From 2be129ac64d2540dc42f89bac85d24d4557aa59f Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Sat, 1 Dec 2018 19:03:33 +0100
Subject: wandac: implement very basic command line interface

---
 src/wandac.cpp | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 75 insertions(+), 4 deletions(-)

(limited to 'src/wandac.cpp')

diff --git a/src/wandac.cpp b/src/wandac.cpp
index 24b529e..dee86f0 100644
--- a/src/wandac.cpp
+++ b/src/wandac.cpp
@@ -3,19 +3,90 @@
 #include "xdg.hpp"
 
 #include <asio.hpp>
+#include <clara.hpp>
 #include <spdlog/spdlog.h>
 #include <spdlog/sinks/stdout_color_sinks.h>
 
+#include <cstdlib>
 #include <filesystem>
+#include <iostream>
 #include <memory>
 
-int main()
+struct cli
 {
-    auto environment = wanda::environment{};
+    std::string command{};
+    bool help{};
+
+    clara::Parser parser;
+
+    auto parse(int argc, char const *const *argv, std::ostream &error)
+    {
+        parser = clara::Arg{command, "command"}("The command to send to the deamon").required() |
+                 clara::Help(help);
+
+        auto result = parser.parse(clara::Args{argc, argv});
+
+        if (!result)
+        {
+            error << "Error while processing command line arguments: "
+                  << result.errorMessage()
+                  << '\n'
+                  << parser
+                  << '\n';
+            return false;
+        }
+        else if (command.empty())
+        {
+            error << "Missing required argument 'command'\n"
+                  << parser
+                  << '\n';
+            return false;
+        }
+
+        return true;
+    }
+};
+
+struct listener : wanda::commander::listener
+{
+    listener(::cli &cli, std::shared_ptr<spdlog::logger> logger)
+        : m_logger{logger},
+          m_cli{cli}
+    {
+    }
+
+    void on_connected(wanda::commander &commander) override
+    {
+        if (m_cli.command == "change")
+        {
+            commander.send({wanda::commander::command_id::change});
+        }
+    }
+
+  private:
+    std::shared_ptr<spdlog::logger> m_logger;
+    ::cli &m_cli;
+};
+
+int main(int argc, char const *const *argv)
+{
+    auto cli = ::cli{};
+    if (!cli.parse(argc, argv, std::cerr))
+    {
+        return EXIT_FAILURE;
+    }
+    else if (cli.help)
+    {
+        std::cout << cli.parser << '\n';
+        return EXIT_SUCCESS;
+    }
+
     auto log = spdlog::stdout_color_mt("wandac");
-    auto interface = wanda::xdg_path_for(wanda::xdg_directory::runtime_dir, environment) / ".wanda_interface";
+    auto interface = wanda::xdg_path_for(wanda::xdg_directory::runtime_dir, wanda::environment{}) / ".wanda_interface";
     auto service = asio::io_service{};
-    auto commander = wanda::commander{service, interface, log};
+    auto listener = ::listener{cli, log};
+
+    auto commander = wanda::commander{service, interface, listener, log};
 
     log->info("trying to connect to wanda control interface on '{}'", interface.native());
     commander.start();
-- 
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