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/commander.cpp | 50 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

(limited to 'src/commander.cpp')

diff --git a/src/commander.cpp b/src/commander.cpp
index 6cb1996..21bf4f5 100644
--- a/src/commander.cpp
+++ b/src/commander.cpp
@@ -1,14 +1,44 @@
 #include "commander.hpp"
 #include "message.hpp"
+#include "optional.hpp"
 
 #include <spdlog/fmt/ostr.h>
 
 namespace wanda
 {
-commander::commander(asio::io_service &service, std::filesystem::path socket, std::shared_ptr<spdlog::logger> logger)
+
+std::optional<message> commander::command::message() const
+{
+    using namespace std::string_literals;
+    auto const command = [this] {
+        switch (id)
+        {
+        case command_id::change:
+            return "CHANGE"s;
+        default:
+            return ""s;
+        }
+    }();
+
+    auto argument_string = std::string{};
+    for(int index = 0ul; index < arguments.size(); ++index)
+    {
+        argument_string += (index) ? "," + arguments[index] : arguments[index]; 
+    }
+
+    if(command.empty())
+    {
+        return std::nullopt;
+    }
+
+    return wanda::message{"C", command, argument_string};
+}
+
+commander::commander(asio::io_service &service, std::filesystem::path socket, listener &listener, std::shared_ptr<spdlog::logger> logger)
     : m_service{service},
       m_endpoint{socket.string()},
       m_socket{service},
+      m_listener{listener},
       m_logger{logger}
 {
 }
@@ -31,6 +61,22 @@ void commander::start()
     });
 }
 
+void commander::send(command command)
+{
+    using namespace wanda::std_ext;
+    
+    if (!m_connection || m_connection->current_state() != control_connection::state::established)
+    {
+        m_logger->error("tried to send command without an established connection");
+        m_listener.on_error(*this, "tried to send command without an established connection");
+        return;
+    }
+
+    with(command.message(), [&](auto const & message){
+        m_connection->send(message);
+    }) || [&]{ m_logger->error("unknown command"); };
+}
+
 void commander::on_error(control_connection::pointer connection, std::error_code error)
 {
     m_logger->error("control interface communication error: '{}'", error.message());
@@ -42,10 +88,12 @@ void commander::on_received(wanda::control_connection::pointer connection, messa
     {
         m_logger->info("connection to wanda deamon successfully established");
         connection->update(control_connection::state::established);
+        m_listener.on_connected(*this);
     }
     else
     {
         m_logger->error("unexpected message: '{}'", message);
+        m_listener.on_error(*this, "unexpected message '" + static_cast<std::string>(message) + '\'');
     }
 }
 
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