Merge branch 'settings'HEADmain

This adds the HTTP GET /settings.json API. Writing settings is only
supported via the Zephyr shell.

1 files changed, 77 insertions, 0 deletions

diff --git a/fw/app/src/settings.c b/fw/app/src/settings.c
new file mode 100644
index 0000000..4b2c248
--- /dev/null
+++ b/fw/app/src/settings.c
@@ -0,0 +1,77 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public License,
+ * v. 2.0. If a copy of the MPL was not distributed with this file, You can
+ * obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include <string.h>
+
+#include <zephyr/data/json.h>
+#include <zephyr/init.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/settings/settings.h>
+
+#include "settings.h"
+
+
+LOG_MODULE_DECLARE(settings);
+
+
+int init_settings(void) {
+	int ret = settings_subsys_init();
+	if (ret < 0) {
+		LOG_ERR("Subsystem init failed (%d)", ret);
+		return ret;
+	}
+	LOG_INF("Subsystem initialized");
+
+	ret = settings_load();
+	if (ret < 0) {
+		LOG_ERR("Failed to load settings (%d)", ret);
+		return ret;
+	}
+	LOG_INF("Loaded settings");
+
+	return 0;
+}
+SYS_INIT(init_settings, APPLICATION, 50);
+
+static const struct json_obj_descr settings_syslog_target_descr[] = {
+	JSON_OBJ_DESCR_PRIM(struct settings_syslog_target, ip, JSON_TOK_STRING),
+};
+
+static const struct json_obj_descr settings_syslog_descr[] = {
+	JSON_OBJ_DESCR_OBJECT(struct settings_syslog, target, settings_syslog_target_descr),
+};
+
+static const struct json_obj_descr settings_descr[] = {
+	JSON_OBJ_DESCR_OBJECT(struct settings, syslog, settings_syslog_descr),
+};
+
+int settings_to_json(void *buffer, size_t len)
+{
+	struct settings settings = {0,};
+	settings.syslog.target.ip = (char *)settings.syslog.target.ip_array;
+
+	int ret = settings_runtime_get("syslog/target/ip",
+	                               settings.syslog.target.ip_array,
+	                               sizeof(settings.syslog.target.ip_array));
+	if (ret < 0) {
+		LOG_ERR("Failed to get runtime setting syslog/target/ip (%d)", ret);
+		return ret;
+	}
+
+	ret = json_obj_encode_buf(
+		settings_descr,
+		ARRAY_SIZE(settings_descr),
+		&settings,
+		buffer,
+		len
+	);
+	if (ret < 0) {
+		LOG_ERR("Failed to serialize settings as JSON");
+		return ret;
+	}
+
+	return 0;
+}