From c47d4b2314b06f28cae47d4dd14ef4c9c5c1af60 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Mon, 24 Aug 2020 19:42:00 +0200
Subject: Added connection stub

---
 Makefile     |  1 +
 connection.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 connection.h | 17 +++++++++++++++++
 3 files changed, 70 insertions(+)
 create mode 100644 connection.c
 create mode 100644 connection.h

diff --git a/Makefile b/Makefile
index c4c3862..9b3c4f3 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,7 @@ main.o: plop.h request.h
 plop.o: plop.h request.h response.h
 request.o: request.h
 response.o: response.h
+connection.o: connection.h request.h
 
 clean:
 	rm -f plop *.o
diff --git a/connection.c b/connection.c
new file mode 100644
index 0000000..c7dd151
--- /dev/null
+++ b/connection.c
@@ -0,0 +1,52 @@
+#include "connection.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <lauxlib.h>
+#include <lua.h>
+
+#include "request.h"
+
+/// Creates new connection.
+/// \param L Server's Lua state
+/// \param client File descriptor of client's socket
+/// \return Pointer to connection or NULL if an error occured
+struct connection * connection_new(lua_State * L, const int client)
+{
+	struct connection * c = malloc(sizeof(struct connection));
+
+	if (NULL == c)
+	{
+		return NULL;
+	}
+
+	memset(c, 0, sizeof(struct connection));
+
+	c->fd = client;
+	c->L = lua_newthread(L);
+	c->lua_ref = luaL_ref(L, LUA_REGISTRYINDEX);
+
+	return c;
+}
+
+/// Clears the state of connection readying it for new request.
+/// \param c Connection to clear
+void connection_clear(struct connection * c)
+{
+	if (NULL != c->request)
+	{
+		free_request(c->request);
+	}
+}
+
+/// Frees all resources associated with the connection.
+/// \param L Server's Lua state
+/// \param c Connection to free
+void connection_free(lua_State * L, struct connection * c)
+{
+	connection_clear(c);
+	luaL_unref(L, LUA_REGISTRYINDEX, c->lua_ref);
+	close(c->fd); // TODO: Check for errors in close()?
+	free(c);
+}
diff --git a/connection.h b/connection.h
new file mode 100644
index 0000000..3a7b32a
--- /dev/null
+++ b/connection.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <lua.h>
+
+#include "request.h"
+
+struct connection
+{
+	int fd;
+	int lua_ref;
+	lua_State * L;
+	struct request * request;
+};
+
+struct connection * connection_new(lua_State *, const int);
+void connection_clear(struct connection *);
+void connection_free(lua_State *, struct connection *);
-- 
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