From b9dd1c40070c48cf5e95f758f07cb1d5d19be9e1 Mon Sep 17 00:00:00 2001
From: Francesco <inbox@francescorocca.me>
Date: Fri, 25 Apr 2025 12:19:07 +0200
Subject: [PATCH] add config parser

---
 README.md               |  2 +-
 config.yaml             |  2 +-
 include/server/server.h |  6 ++++++
 include/utils/config.h  |  8 ++++++++
 src/main.c              | 35 ++++++++++++++++++++++++++-------
 src/meson.build         |  2 +-
 src/utils/config.c      | 43 ++++++++++++++++++++++++++++++++++++++---
 7 files changed, 85 insertions(+), 13 deletions(-)

diff --git a/README.md b/README.md
index 0aa732d..5b91413 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ will it ever be. Use it at your own risk.
 - [doxygen](https://www.doxygen.nl/)
     - Optional, just to build the docs.
 - libcyaml
-- libyaml-0.1
+- libyaml
 
 ## How to build
 
diff --git a/config.yaml b/config.yaml
index c53c471..6733aff 100644
--- a/config.yaml
+++ b/config.yaml
@@ -1,5 +1,5 @@
 # Default config file of CWS
-host: "localhost"
+host: localhost
 port: 3030
 
 cert: "cert.pem"
diff --git a/include/server/server.h b/include/server/server.h
index 96aadb8..913021d 100644
--- a/include/server/server.h
+++ b/include/server/server.h
@@ -40,6 +40,12 @@ void cws_server_setup_hints(struct addrinfo *hints, size_t len, const char *host
  */
 void cws_server_loop(int sockfd);
 
+// @TODO
+/**
+ * @brief Cleanup server's resources
+ */
+void cws_server_cleanup();
+
 /**
  * @brief Adds a file descriptor to the interest list
  *
diff --git a/include/utils/config.h b/include/utils/config.h
index 05d950d..e4c9475 100644
--- a/include/utils/config.h
+++ b/include/utils/config.h
@@ -2,6 +2,14 @@
 #define CWS_CONFIG_H
 
 typedef struct cws_config_t {
+	char *host;
+	char *port;
+
+	char *cert;
+	char *key;
 } cws_config;
 
+cws_config *cws_config_init(void);
+void cws_config_free(cws_config *config);
+
 #endif
diff --git a/src/main.c b/src/main.c
index 90b7e45..fe481eb 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,17 +1,38 @@
+#include <signal.h>
 #include <stdio.h>
+#include <unistd.h>
 
 #include "server/server.h"
 #include "utils/colors.h"
+#include "utils/config.h"
+
+void cws_signal_handler(int signo) {
+	/* TODO */
+	fprintf(stdout, BLUE "[server] Cleaning up resources...\n" RESET);
+	fprintf(stdout, BLUE "[server] Closing...\n" RESET);
+	_exit(1);
+}
 
 int main(int argc, char **argv) {
-	const char *default_port = "3030";
-
-	fprintf(stdout, BOLD GREEN "[server] Running cws on http://localhost:%s...\n" RESET, default_port);
-
-	int ret = cws_server_start(NULL, default_port);
-	if (ret < 0) {
-		fprintf(stderr, BOLD RED "Unable to start web server\n");
+	cws_config *config = cws_config_init();
+	if (config == NULL) {
+		fprintf(stderr, RED BOLD "[server] Unable to read config file\n" RESET);
+		return 1;
 	}
 
+	if (signal(SIGINT, cws_signal_handler) == SIG_ERR) {
+		fprintf(stderr, BOLD RED "[server] Unable to setup signal()\n" RESET);
+		return 1;
+	}
+
+	fprintf(stdout, BOLD GREEN "[server] Running cws on http://%s:%s...\n" RESET, config->host, config->port);
+
+	int ret = cws_server_start(config->host, config->port);
+	if (ret < 0) {
+		fprintf(stderr, BOLD RED "[server] Unable to start web server\n" RESET);
+	}
+
+	cws_config_free(config);
+
 	return 0;
 }
diff --git a/src/meson.build b/src/meson.build
index 856b031..59f2b66 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,3 +1,3 @@
 server = files('main.c', 'server/server.c')
-server += files('utils/utils.c', 'utils/hashmap.c')
+server += files('utils/utils.c', 'utils/hashmap.c', 'utils/config.c')
 server += files('http/http.c')
diff --git a/src/utils/config.c b/src/utils/config.c
index 9a3e926..4c13593 100644
--- a/src/utils/config.c
+++ b/src/utils/config.c
@@ -1,5 +1,42 @@
 #include "utils/config.h"
 
-int nothing() {
-    return 0;
-}
\ No newline at end of file
+#include <cyaml/cyaml.h>
+
+static const cyaml_config_t cyaml_config = {
+	.log_fn = cyaml_log,
+	.mem_fn = cyaml_mem,
+	.log_level = CYAML_LOG_WARNING,
+};
+
+static const cyaml_schema_field_t top_mapping_schema[] = {
+	CYAML_FIELD_STRING_PTR("host", CYAML_FLAG_POINTER, cws_config, host, 0, CYAML_UNLIMITED),
+	CYAML_FIELD_STRING_PTR("port", CYAML_FLAG_POINTER, cws_config, port, 0, CYAML_UNLIMITED),
+	CYAML_FIELD_STRING_PTR("cert", CYAML_FLAG_POINTER, cws_config, cert, 0, CYAML_UNLIMITED),
+	CYAML_FIELD_STRING_PTR("key", CYAML_FLAG_POINTER, cws_config, key, 0, CYAML_UNLIMITED), CYAML_FIELD_END};
+
+static const cyaml_schema_value_t top_schema = {
+	CYAML_VALUE_MAPPING(CYAML_FLAG_POINTER, cws_config, top_mapping_schema),
+};
+
+cws_config *cws_config_init(void) {
+	char *path = "config.yaml";
+	cws_config *config;
+
+	cyaml_err_t err = cyaml_load_file(path, &cyaml_config, &top_schema, (cyaml_data_t **)&config, NULL);
+	if (err != CYAML_OK) {
+		return NULL;
+	}
+
+	return config;
+}
+
+void cws_config_free(cws_config *config) {
+	cyaml_err_t err = cyaml_free(&cyaml_config, &top_schema, config, 0);
+	if (err != CYAML_OK) {
+		/* Handle */
+	}
+}
+
+/*
+	https://github.com/tlsa/libcyaml/blob/main/docs/guide.md
+*/