Flesh out time module

components/time/time_manager.c

@@ -0,0 +1,33 @@
+/*
+ * SPDX-License-Identifier: AGPL-3.0-only
+ * Copyright (c) Camden Dixie O'Brien
+ */
+
+#include "time_manager.h"
+
+#include "config.h"
+
+#include <time.h>
+
+static void handle_timezone_update(const char *timezone)
+{
+	setenv("TZ", timezone, 1);
+	tzset();
+}
+
+void time_manager_init(void)
+{
+	char timezone[CONFIG_MAX_VALUE_SIZE];
+	(void)config_get_timezone(timezone, CONFIG_MAX_VALUE_SIZE);
+	handle_timezone_update(timezone);
+
+	config_add_timezone_callback(&handle_timezone_update);
+}
+
+Time get_time(void)
+{
+	const time_t now = time(NULL);
+	struct tm timeinfo;
+	(void)localtime_r(&now, &timeinfo);
+	return (Time) { .hour = timeinfo.tm_hour, .minute = timeinfo.tm_min };
+}