From 4247c9fe7d25c921fbfc73fc50e849c8780e7ad6 Mon Sep 17 00:00:00 2001
From: jacqueline <me@jacqueline.id.au>
Date: Tue, 29 Aug 2023 16:07:56 +1000
Subject: store the screen brightness in nvs

---
 src/drivers/nvs.cpp | 135 ++++++++++++++++++++++++++++++++++------------------
 1 file changed, 89 insertions(+), 46 deletions(-)

(limited to 'src/drivers/nvs.cpp')

diff --git a/src/drivers/nvs.cpp b/src/drivers/nvs.cpp
index d2110764..c2832bf4 100644
--- a/src/drivers/nvs.cpp
+++ b/src/drivers/nvs.cpp
@@ -6,14 +6,17 @@
 
 #include "nvs.hpp"
 #include <stdint.h>
+#include <sys/_stdint.h>
 
 #include <cstdint>
 #include <memory>
 
 #include "bluetooth.hpp"
+#include "bluetooth_types.hpp"
 #include "esp_log.h"
 #include "nvs.h"
 #include "nvs_flash.h"
+#include "tasks.hpp"
 
 namespace drivers {
 
@@ -23,8 +26,9 @@ static constexpr uint8_t kSchemaVersion = 1;
 static constexpr char kKeyVersion[] = "ver";
 static constexpr char kKeyBluetooth[] = "bt";
 static constexpr char kKeyOutput[] = "out";
+static constexpr char kKeyBrightness[] = "bright";
 
-auto NvsStorage::Open() -> NvsStorage* {
+auto NvsStorage::OpenSync() -> NvsStorage* {
   esp_err_t err = nvs_flash_init();
   if (err == ESP_ERR_NVS_NO_FREE_PAGES) {
     ESP_LOGW(kTag, "partition needs initialisation");
@@ -42,73 +46,112 @@ auto NvsStorage::Open() -> NvsStorage* {
     return nullptr;
   }
 
-  std::unique_ptr<NvsStorage> instance = std::make_unique<NvsStorage>(handle);
-  if (instance->SchemaVersion() < kSchemaVersion) {
-    ESP_LOGW(kTag, "namespace needs downgrading");
-    nvs_erase_all(handle);
-    nvs_set_u8(handle, kKeyVersion, kSchemaVersion);
-    err = nvs_commit(handle);
-    if (err != ESP_OK) {
-      ESP_LOGW(kTag, "failed to init namespace");
-      return nullptr;
-    }
+  std::unique_ptr<NvsStorage> instance = std::make_unique<NvsStorage>(
+      std::unique_ptr<tasks::Worker>(
+          tasks::Worker::Start<tasks::Type::kNvsWriter>()),
+      handle);
+  if (instance->SchemaVersionSync() < kSchemaVersion &&
+      !instance->DowngradeSchemaSync()) {
+    ESP_LOGW(kTag, "failed to init namespace");
+    return nullptr;
   }
 
   ESP_LOGI(kTag, "nvm storage initialised okay");
   return instance.release();
 }
 
-NvsStorage::NvsStorage(nvs_handle_t handle) : handle_(handle) {}
+NvsStorage::NvsStorage(std::unique_ptr<tasks::Worker> worker,
+                       nvs_handle_t handle)
+    : writer_(std::move(worker)), handle_(handle) {}
 
 NvsStorage::~NvsStorage() {
   nvs_close(handle_);
   nvs_flash_deinit();
 }
 
-auto NvsStorage::SchemaVersion() -> uint8_t {
-  uint8_t ret;
-  if (nvs_get_u8(handle_, kKeyVersion, &ret) != ESP_OK) {
-    return UINT8_MAX;
-  }
-  return ret;
+auto NvsStorage::DowngradeSchemaSync() -> bool {
+  ESP_LOGW(kTag, "namespace needs downgrading");
+  return writer_
+             ->Dispatch<bool>([&]() -> bool {
+               nvs_erase_all(handle_);
+               nvs_set_u8(handle_, kKeyVersion, kSchemaVersion);
+               return nvs_commit(handle_);
+             })
+             .get() == ESP_OK;
+}
+
+auto NvsStorage::SchemaVersionSync() -> uint8_t {
+  return writer_
+      ->Dispatch<uint8_t>([&]() -> uint8_t {
+        uint8_t ret;
+        if (nvs_get_u8(handle_, kKeyVersion, &ret) != ESP_OK) {
+          return UINT8_MAX;
+        }
+        return ret;
+      })
+      .get();
 }
 
 auto NvsStorage::PreferredBluetoothDevice()
-    -> std::optional<bluetooth::mac_addr_t> {
-  bluetooth::mac_addr_t out{0};
-  size_t size = out.size();
-  if (nvs_get_blob(handle_, kKeyBluetooth, out.data(), &size) != ESP_OK) {
-    return {};
-  }
-  return out;
+    -> std::future<std::optional<bluetooth::mac_addr_t>> {
+  return writer_->Dispatch<std::optional<bluetooth::mac_addr_t>>(
+      [&]() -> std::optional<bluetooth::mac_addr_t> {
+        bluetooth::mac_addr_t out{0};
+        size_t size = out.size();
+        if (nvs_get_blob(handle_, kKeyBluetooth, out.data(), &size) != ESP_OK) {
+          return {};
+        }
+        return out;
+      });
 }
 
 auto NvsStorage::PreferredBluetoothDevice(
-    std::optional<bluetooth::mac_addr_t> addr) -> void {
-  if (!addr) {
-    nvs_erase_key(handle_, kKeyBluetooth);
-  } else {
-    nvs_set_blob(handle_, kKeyBluetooth, addr.value().data(),
-                 addr.value().size());
-  }
-  nvs_commit(handle_);
+    std::optional<bluetooth::mac_addr_t> addr) -> std::future<bool> {
+  return writer_->Dispatch<bool>([&]() {
+    if (!addr) {
+      nvs_erase_key(handle_, kKeyBluetooth);
+    } else {
+      nvs_set_blob(handle_, kKeyBluetooth, addr.value().data(),
+                   addr.value().size());
+    }
+    return nvs_commit(handle_) == ESP_OK;
+  });
 }
 
-auto NvsStorage::OutputMode() -> Output {
-  uint8_t out = 0;
-  nvs_get_u8(handle_, kKeyOutput, &out);
-  switch (out) {
-    case static_cast<uint8_t>(Output::kBluetooth):
-      return Output::kHeadphones;
-    case static_cast<uint8_t>(Output::kHeadphones):
-    default:
-      return Output::kHeadphones;
-  }
+auto NvsStorage::OutputMode() -> std::future<Output> {
+  return writer_->Dispatch<Output>([&]() -> Output {
+    uint8_t out = 0;
+    nvs_get_u8(handle_, kKeyOutput, &out);
+    switch (out) {
+      case static_cast<uint8_t>(Output::kBluetooth):
+        return Output::kHeadphones;
+      case static_cast<uint8_t>(Output::kHeadphones):
+      default:
+        return Output::kHeadphones;
+    }
+  });
+}
+
+auto NvsStorage::OutputMode(Output out) -> std::future<bool> {
+  return writer_->Dispatch<bool>([&]() {
+    nvs_set_u8(handle_, kKeyOutput, static_cast<uint8_t>(out));
+    return nvs_commit(handle_) == ESP_OK;
+  });
+}
+
+auto NvsStorage::ScreenBrightness() -> std::future<uint_fast8_t> {
+  return writer_->Dispatch<uint_fast8_t>([&]() -> uint_fast8_t {
+    uint8_t out = 50;
+    nvs_get_u8(handle_, kKeyBrightness, &out);
+    return out;
+  });
 }
 
-auto NvsStorage::OutputMode(Output out) -> void {
-  nvs_set_u8(handle_, kKeyOutput, static_cast<uint8_t>(out));
-  nvs_commit(handle_);
+auto NvsStorage::ScreenBrightness(uint_fast8_t val) -> std::future<bool> {
+  return writer_->Dispatch<bool>([&]() {
+    nvs_set_u8(handle_, kKeyBrightness, val);
+    return nvs_commit(handle_) == ESP_OK;
+  });
 }
 
 }  // namespace drivers
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