src/view/options.ts


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export type Options = {
  major: boolean,
  minor: boolean,
  seventh: boolean,
  minorSeventh: boolean,
  majorSeventh: boolean,
  bpm: number,
  beatsPerChord: number
}

let defaultOptions: Options = {
  major: true,
  minor: false,
  seventh: false,
  minorSeventh: false,
  majorSeventh: false,
  bpm: 90,
  beatsPerChord: 4
}

let key: string = 'options'

export function load(): Options {
  let str = localStorage[key]
  return str && JSON.parse(str) || defaultOptions
}

export function save(options: Options): void {
  localStorage[key] = JSON.stringify(options)
}