First step of the connection skeleton

Basic connect, socket creating, polling, recving, etc.

src/libirc/irc_client.hpp

@@ -0,0 +1,67 @@
+#ifndef IRC_CLIENT_INCLUDED
+# define IRC_CLIENT_INCLUDED
+
+#include <network/socket_handler.hpp>
+
+#include <string>
+
+/**
+ * Represent one IRC client, i.e. an endpoint connected to a single IRC
+ * server, through a TCP socket, receiving and sending commands to it.
+ *
+ * TODO: TLS support, maybe, but that's not high priority
+ */
+class IrcClient: public SocketHandler
+{
+public:
+  explicit IrcClient();
+  ~IrcClient();
+  /**
+   * We read the data, try to parse it and generate some event if
+   * one or more full message is available.
+   */
+  void on_recv();
+  /**
+   * Just write as much data as possible on the socket.
+   */
+  void on_send();
+  socket_t get_socket() const;
+  /**
+   * Connect to the remote server
+   */
+  void connect(const std::string& address, const std::string& port);
+  /**
+   * Close the connection, remove us from the poller
+   */
+  void close();
+  /**
+   * Called when we detect an orderly close by the remote endpoint.
+   */
+  void on_connection_close();
+  /**
+   * Parse the data we have received so far and try to get one or more
+   * complete messages from it.
+   */
+  void parse_in_buffer();
+
+private:
+  socket_t socket;
+  /**
+   * Where data read from the socket is added, until we can parse a whole
+   * IRC message, the used data is then removed from that buffer.
+   *
+   * TODO: something more efficient than a string.
+   */
+  std::string in_buf;
+  /**
+   * Where data is added, when we want to send something to the client.
+   */
+  std::string out_buf;
+
+  IrcClient(const IrcClient&) = delete;
+  IrcClient(IrcClient&&) = delete;
+  IrcClient& operator=(const IrcClient&) = delete;
+  IrcClient& operator=(IrcClient&&) = delete;
+};
+
+#endif // IRC_CLIENT_INCLUDED