Create a config module

2 files changed, 91 insertions, 0 deletions

diff --git a/src/config.c b/src/config.c
new file mode 100644
index 0000000..c0d9409
--- /dev/null
+++ b/src/config.c
@@ -0,0 +1,75 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <uconfig.h>
+
+#include "config.h"
+#include "system.h"
+#include "utils.h"
+
+#define CONFIG_STR_SIZE 128
+
+static struct uconfig_s *uconfig;
+static char *ftag_config_keys[FC_COUNT];
+static char ftag_config_values[FC_COUNT][CONFIG_STR_SIZE];
+
+static void ftag_config_read(enum ftag_config_e key)
+{
+	char *new_value = uconfig_get(uconfig, ftag_config_keys[key]);
+	if (new_value != NULL) {
+		assert(strlen(new_value) < CONFIG_STR_SIZE);
+		strcpy(ftag_config_values[key], new_value);
+	}
+}
+
+void ftag_config_init(char *config_file)
+{
+	const char *env_home = getenv("HOME");
+
+	/* Keys */
+	ftag_config_keys[FC_DATABASE_PATH] = "database_path";
+	ftag_config_keys[FC_CACHE_DIR] = "cache_dir";
+	ftag_config_keys[FC_REMOTE_HOST] = "remote_host";
+	ftag_config_keys[FC_REMOTE_ROOT] = "remote_root";
+
+	/* Defaults */
+	strbuild(ftag_config_values[FC_DATABASE_PATH],
+		 "%s/.cache/ftag/ftag.sqlite3", env_home);
+	strbuild(ftag_config_values[FC_CACHE_DIR],
+		 "%s/.cache/ftag", env_home);
+	strcpy(ftag_config_values[FC_REMOTE_HOST], "localhost");
+	strcpy(ftag_config_values[FC_REMOTE_ROOT], "ftag");
+
+	if (config_file == NULL) {
+		/* Use default config file */
+		/* TODO: prioritize XDG_CONFIG_HOME */
+		config_file = malloc(CONFIG_STR_SIZE);
+		strbuild_with_size(config_file, CONFIG_STR_SIZE,
+				   "%s/.config/ftag/ftag.conf", env_home);
+	}
+
+	uconfig = NULL;
+	if (file_exists(config_file)) {
+		uconfig = uconfig_new(config_file);
+		if (uconfig == NULL) {
+			fprintf(stderr,
+				"%s: error during configuration file parsing\n",
+				__func__);
+			exit(EXIT_FAILURE);
+		}
+		for (enum ftag_config_e key = FC_FIRST; key < FC_COUNT; key++) {
+			ftag_config_read(key);
+		}
+	}
+}
+
+const char *ftag_config_get(enum ftag_config_e key)
+{
+	return ftag_config_values[key];
+}
+
+void ftag_config_finalize(void)
+{
+	uconfig_destroy(uconfig);
+}
diff --git a/src/config.h b/src/config.h
index 82ffd6a..50cba3a 100644
--- a/src/config.h
+++ b/src/config.h
@@ -12,4 +12,20 @@
 
 #define DATABASE_PATH FTAG_CACHE_DIR "/ftag.sqlite3"
 
+/* Note "FC" stands for "Ftag Config". */
+enum ftag_config_e {
+	FC_DATABASE_PATH,
+	FC_CACHE_DIR,
+	FC_REMOTE_HOST,
+	FC_REMOTE_ROOT,
+	FC_COUNT,
+	FC_FIRST = FC_DATABASE_PATH
+};
+
+void ftag_config_init(char *config_file);
+
+const char *ftag_config_get(enum ftag_config_e key);
+
+void ftag_config_destroy(void);
+
 #endif