const PREFIX = 'sky';


export const get = (k: string, def: any = null): any => {
  const key = `${PREFIX}_${k}`;
  const val = localStorage.getItem(key);
  return val ? JSON.parse(val) : def;
};

export const set = (k: string, v: any): void => {
  const key = `${PREFIX}_${k}`;
  localStorage.setItem(key, JSON.stringify(v));
};

export const remove = (k: string): void => {
  const key = `${PREFIX}_${k}`;
  localStorage.removeItem(key);
};

export const getByPrefix = (prefix: string): any[] => {
  const prefKey = `${PREFIX}_${prefix}`;

  return Object.keys(localStorage)
    .filter((key) => key.indexOf(prefKey) === 0)
    .map((key) => JSON.parse(localStorage[key]));
};

export const removeByPrefix = (prefix: string): void => {
  const prefKey = `${PREFIX}_${prefix}`;

  const keys = Object.keys(localStorage).filter((key) => key.indexOf(prefKey) === 0);

  keys.forEach((key => {
    localStorage.removeItem(key);
  }));
};