Start keeping lock switch polarity in nvs

i will use this to do a sneaky trick; in-place upgrading brendan,
hailey, and erin's devices

1 files changed, 14 insertions, 0 deletions

diff --git a/src/drivers/nvs.cpp b/src/drivers/nvs.cpp
index c8d4d636..8c9aa361 100644
--- a/src/drivers/nvs.cpp
+++ b/src/drivers/nvs.cpp
@@ -33,6 +33,7 @@ static constexpr char kKeyAmpCurrentVolume[] = "hp_vol";
 static constexpr char kKeyAmpLeftBias[] = "hp_bias";
 static constexpr char kKeyOnboarded[] = "intro";
 static constexpr char kKeyPrimaryInput[] = "in_pri";
+static constexpr char kKeyLockPolarity[] = "lockpol";
 
 auto NvsStorage::OpenSync() -> NvsStorage* {
   esp_err_t err = nvs_flash_init();
@@ -85,6 +86,19 @@ auto NvsStorage::SchemaVersionSync() -> uint8_t {
   return ret;
 }
 
+auto NvsStorage::LockPolarity() -> bool {
+  uint8_t res;
+  if (nvs_get_u8(handle_, kKeyLockPolarity, &res) != ESP_OK) {
+    return false;
+  }
+  return res > 0;
+}
+
+auto NvsStorage::LockPolarity(bool p) -> bool {
+  nvs_set_u8(handle_, kKeyLockPolarity, p);
+  return nvs_commit(handle_) == ESP_OK;
+}
+
 auto NvsStorage::PreferredBluetoothDevice()
     -> std::optional<bluetooth::mac_addr_t> {
   bluetooth::mac_addr_t out{0};