src/settings/service/src/night_mode/night_mode_controller.rs

// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

use crate::base::SettingInfo;
use crate::handler::base::Request;
use crate::handler::setting_handler::persist::{controller as data_controller, ClientProxy};
use crate::handler::setting_handler::{
    controller, ControllerError, IntoHandlerResult, SettingHandlerResult,
};
use crate::night_mode::types::NightModeInfo;
use async_trait::async_trait;
use settings_storage::device_storage::{DeviceStorage, DeviceStorageCompatible};
use settings_storage::storage_factory::{NoneT, StorageAccess};

impl DeviceStorageCompatible for NightModeInfo {
    type Loader = NoneT;
    const KEY: &'static str = "night_mode_info";
}

impl From<NightModeInfo> for SettingInfo {
    fn from(info: NightModeInfo) -> SettingInfo {
        SettingInfo::NightMode(info)
    }
}

pub struct NightModeController {
    client: ClientProxy,
}

impl StorageAccess for NightModeController {
    type Storage = DeviceStorage;
    type Data = NightModeInfo;
    const STORAGE_KEY: &'static str = NightModeInfo::KEY;
}

#[async_trait]
impl data_controller::Create for NightModeController {
    async fn create(client: ClientProxy) -> Result<Self, ControllerError> {
        Ok(NightModeController { client })
    }
}

#[async_trait]
impl controller::Handle for NightModeController {
    async fn handle(&self, request: Request) -> Option<SettingHandlerResult> {
        match request {
            Request::SetNightModeInfo(night_mode_info) => {
                let id = fuchsia_trace::Id::new();
                let mut current = self.client.read_setting::<NightModeInfo>(id).await;

                // Save the value locally.
                current.night_mode_enabled = night_mode_info.night_mode_enabled;
                Some(self.client.write_setting(current.into(), id).await.into_handler_result())
            }
            Request::Get => Some(
                self.client
                    .read_setting_info::<NightModeInfo>(fuchsia_trace::Id::new())
                    .await
                    .into_handler_result(),
            ),
            _ => None,
        }
    }
}