storage 调试

cubeDebug.js

function datetime(date = new Date(), format) {
  if (date && typeof date === 'string') {
    const dateString = date;
    date = new Date(Date.parse(date));
    if (isNaN(date.getTime()) && !format) {
      format = dateString;
      date = new Date();
    }
  }
  format = format || 'YYYY-MM-DD HH:mm:ss';
  const fn = d => {
    return ('0' + d).slice(-2);
  };
  const d = new Date(date);
  const formats = {
    YYYY: d.getFullYear(),
    MM: fn(d.getMonth() + 1),
    DD: fn(d.getDate()),
    HH: fn(d.getHours()),
    mm: fn(d.getMinutes()),
    ss: fn(d.getSeconds())
  };
  return format.replace(/([a-z])\1+/ig, a => {
    return formats[a] || a;
  });
}

const DB = {
  save: function(key, jsonData, expSecond){
    const record = {
      value: jsonData,
      timestamp: !expSecond ? null : datetime(new Date().getTime() + expSecond * 1000)
    };
    localStorage.setItem(key, JSON.stringify(record));
    return jsonData;
  },
  get: function(key, ignoreExp){
    const record = JSON.parse(localStorage.getItem(key));
    if (record) {
      if (!ignoreExp && record.timestamp && new Date().getTime() > +new Date(record.timestamp)) {
        return null;
      }
      return record.value;
    }
    return null;
  },
  debug: function fn(key, restart) {
    let begin = {
      value: {},
      timestamp: null,
    };
    if (!restart) {
      begin = JSON.parse(window.localStorage.getItem(key)) || begin;
    }
    window.localStorage.setItem(key, JSON.stringify(begin));
    return function(action, jsonData) {
      try {
        let preObj = JSON.parse(window.localStorage.getItem(key));
        preObj['value'][action] = jsonData;
        preObj.timestamp = datetime();
        window.localStorage.setItem(key, JSON.stringify(preObj));
        return JSON.stringify(preObj)
      } catch(e) {
        console.warn(e);
      }
    }
  }
}

// DB.save('a', {a: 123});
// DB.save('b', {a: 123}, 10);
// console.log(DB.get('a'), '---');
// DB.debug('sec')('a', {b: 123});
// console.log(DB.get('sec', true), '++++');

module.exports = DB;