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#include "ws2812b_writer.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "state_version.h"
static const char* TAG = "state_store";
static const char* NAMESPACE = "ws";
static const char* KEY = "state";
typedef struct {
uint32_t version;
ws_state_t state;
} ws_state_blob_t;
esp_err_t ws_state_save(const ws_state_t* state)
{
nvs_handle_t h;
esp_err_t err = nvs_open(NAMESPACE, NVS_READWRITE, &h);
if (err != ESP_OK) {
ESP_LOGE(TAG, "nvs_open failed: %d", err);
return err;
}
ws_state_blob_t blob = {.version = WS_STATE_SCHEMA_HASH, .state = *state};
err = nvs_set_blob(h, KEY, &blob, sizeof(blob));
if (err == ESP_OK) {
err = nvs_commit(h);
}
nvs_close(h);
if (err != ESP_OK) {
ESP_LOGE(TAG, "nvs_set_blob/commit failed: %d", err);
}
return err;
}
esp_err_t ws_state_load(ws_state_t* out_state)
{
nvs_handle_t h;
esp_err_t err = nvs_open(NAMESPACE, NVS_READONLY, &h);
if (err != ESP_OK) {
return err;
}
ws_state_blob_t blob;
size_t len = sizeof(blob);
err = nvs_get_blob(h, KEY, &blob, &len);
nvs_close(h);
if (err != ESP_OK) {
return err;
}
if (len != sizeof(blob) || blob.version != WS_STATE_SCHEMA_HASH) {
return ESP_ERR_INVALID_VERSION;
}
*out_state = blob.state;
return ESP_OK;
}
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