From 375799fa79d1af76f33299acc20a11a167a021f8 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Thu, 17 Aug 2023 12:32:50 +0200
Subject: project: restructure libraries and build env

---
 source/lib/control/src/connection.cpp | 124 ++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 source/lib/control/src/connection.cpp

(limited to 'source/lib/control/src/connection.cpp')

diff --git a/source/lib/control/src/connection.cpp b/source/lib/control/src/connection.cpp
new file mode 100644
index 0000000..30fc8af
--- /dev/null
+++ b/source/lib/control/src/connection.cpp
@@ -0,0 +1,124 @@
+#include "wanda/control/connection.hpp"
+
+#include "wanda/proto/message.hpp"
+
+#include <asio.hpp>
+
+#include <limits>
+
+namespace wanda::control
+{
+  connection::pointer make_connection(connection::protocol::socket && socket)
+  {
+    return std::make_shared<connection>(connection::key{}, std::move(socket));
+  }
+
+  connection::connection(connection::key key, connection::protocol::socket socket)
+      : keyed{key}
+      , m_socket{std::move(socket)}
+  {
+  }
+
+  bool connection::add(listener * listener)
+  {
+    auto [_, inserted] = m_listeners.insert(listener);
+    return inserted;
+  }
+
+  bool connection::remove(listener * listener)
+  {
+    return m_listeners.erase(listener);
+  }
+
+  void connection::start()
+  {
+    if (m_state == state::unknown)
+    {
+      m_state = state::fresh;
+      perform_read();
+    }
+  }
+
+  void connection::send(proto::message message)
+  {
+    m_output << message << '\n';
+    asio::async_write(m_socket, m_out, asio::transfer_exactly(message.size() + 1), [that = shared_from_this(), this](auto const & error, auto const length) {
+      if (error)
+      {
+        // TODO: Handle error
+      }
+      else
+      {
+        m_out.consume(length);
+      }
+    });
+  }
+
+  void connection::close()
+  {
+    if (auto error = std::error_code{}; m_socket.cancel(error))
+    {
+      for (auto & listener : m_listeners)
+      {
+        listener->on_error(shared_from_this(), error);
+      }
+    }
+
+    if (auto error = std::error_code{}; m_socket.close(error))
+    {
+      for (auto & listener : m_listeners)
+      {
+        listener->on_error(shared_from_this(), error);
+      }
+    }
+
+    for (auto & listener : m_listeners)
+    {
+      listener->on_close(shared_from_this());
+    }
+    m_listeners.clear();
+  }
+
+  void connection::update(state state)
+  {
+    m_state = state;
+  }
+
+  connection::state connection::current_state() const
+  {
+    return m_state;
+  }
+
+  void connection::perform_read()
+  {
+    asio::async_read_until(m_socket, m_in, '\n', [that = shared_from_this(), this](auto const & error, auto const length) {
+      if (error)
+      {
+        for (auto & listener : m_listeners)
+        {
+          listener->on_error(shared_from_this(), error);
+        }
+        close();
+      }
+      else
+      {
+        auto msg = proto::message{};
+        m_input >> msg;
+        if (!m_input)
+        {
+          m_input.ignore(std::numeric_limits<std::streamsize>::max());
+          m_input.clear();
+        }
+        else
+        {
+          for (auto & listener : m_listeners)
+          {
+            listener->on_received(shared_from_this(), msg);
+          }
+        }
+        perform_read();
+      }
+    });
+  }
+
+}  // namespace wanda::control
\ No newline at end of file
-- 
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