init: initial commit

components/config_store/include/config_store.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "esp_err.h"
+
+#define MQTT_HOST_MAX_LEN 128
+#define MQTT_URI_MAX_LEN  256
+
+esp_err_t config_store_init(void);
+bool      config_store_is_provisioned(void);
+esp_err_t config_store_set_provisioned(void);
+esp_err_t config_store_clear_provisioned(void);
+
+/* Store an optional manual MQTT broker override (used if mDNS fails). */
+esp_err_t config_store_set_mqtt_override(const char *host, uint16_t port);
+
+/* Returns ESP_ERR_NVS_NOT_FOUND if no override is stored. */
+esp_err_t config_store_get_mqtt_override(char host_out[MQTT_HOST_MAX_LEN], uint16_t *port_out);
+
+/* Returns ESP_ERR_NVS_NOT_FOUND if no override is stored. */
+esp_err_t config_store_get_mqtt_override_uri(char *uri_out, size_t uri_max_len);