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// Copyright 2019-2021 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

//! The Tauri-specific settings for your application.
//!
//! This only contains notification permission status for now, but is able to expand in the future.

use crate::{
  api::{
    file::read_binary,
    path::{resolve_path, BaseDirectory},
  },
  Config, Env, PackageInfo,
};
use serde::{Deserialize, Serialize};
use std::{
  fs::File,
  io::Write,
  path::{Path, PathBuf},
};

/// The Tauri Settings.
#[derive(Debug, Clone, Default, Deserialize, Serialize)]
#[non_exhaustive]
pub struct Settings {
  /// Whether the user allows notifications or not.
  #[cfg(notification_all)]
  pub allow_notification: Option<bool>,
}

/// Gets the path to the settings file.
fn get_settings_path(
  config: &Config,
  package_info: &PackageInfo,
  env: &Env,
) -> crate::api::Result<PathBuf> {
  resolve_path(
    config,
    package_info,
    env,
    ".tauri-settings",
    Some(BaseDirectory::App),
  )
}

/// Write the settings to the file system.
#[allow(dead_code)]
pub(crate) fn write_settings(
  config: &Config,
  package_info: &PackageInfo,
  env: &Env,
  settings: Settings,
) -> crate::Result<()> {
  let settings_path = get_settings_path(config, package_info, env)?;
  let settings_folder = Path::new(&settings_path).parent().unwrap();
  if !settings_folder.exists() {
    std::fs::create_dir(settings_folder)?;
  }
  File::create(settings_path)
    .map_err(Into::into)
    .and_then(|mut f| {
      f.write_all(&bincode::serialize(&settings).map_err(crate::api::Error::Bincode)?)
        .map_err(Into::into)
    })
}

/// Reads the settings from the file system.
pub fn read_settings(config: &Config, package_info: &PackageInfo, env: &Env) -> Settings {
  if let Ok(settings_path) = get_settings_path(config, package_info, env) {
    if settings_path.exists() {
      read_binary(settings_path)
        .and_then(|settings| bincode::deserialize(&settings).map_err(Into::into))
        .unwrap_or_default()
    } else {
      Settings::default()
    }
  } else {
    Settings::default()
  }
}