export function genCode(len) {
    const chars = '123456789ABCDEFGHJKLMNPQRSTWXYZabcdefghijklmnopqrstuvwxyz';
    const charArr = chars.split('');
    let code = '';
    for (let i = 0; i < len; i++) {
      code += charArr[Math.floor(Math.random() * charArr.length)];
    }
    return code;
  }

  export function decodeStr(type, str) {
    if(str == '&') str = '';
    return str.split('|').map(cur => {
      let arr = cur.split('&');
      let result = {};
      switch (type) {
        case 'fixReward': {
          let [gid, count] = arr;
          result = { gid: parseInt(gid), count: parseInt(count)};
          break;
        }
        case 'conditionReward': {
          let [gid, count, condition] = arr;
          result = { gid: parseInt(gid), count: parseInt(count), condition: parseInt(condition) };
          break;
        }
        case 'randomReward': {
          let [gid, count, frequency] = arr;
          result = { gid: parseInt(gid), count: parseInt(count), frequency: parseInt(frequency) };
        }
      }
      return result;
    });
  }