utils.js

export const iso2TimeString = isoTime => {
  const tIndex = isoTime.indexOf('T');
  const dotIndex = isoTime.indexOf('.');

  let date = isoTime.substr(0, tIndex);
  const time = isoTime.substr(tIndex+1, dotIndex-tIndex-1);

  date = date.replace(/-/g, '/');

  return date + ' ' + time;
}

const leadingZero = str => {
  return ("0" + str).slice(-2);
}

export const formatDate = date => {
  const yearStr = date.getFullYear();
  const monthStr = leadingZero(1 + date.getMonth());
  const dayStr = leadingZero(date.getDate());
  const hourStr = leadingZero(date.getHours());
  const minuteStr = leadingZero(date.getMinutes());
  const secondStr = leadingZero(date.getSeconds());
  
  
  let formatStr = 'YYYY/MM/DD hh:mm:ss';
  formatStr = formatStr.replace(/YYYY/g, yearStr);
  formatStr = formatStr.replace(/MM/g, monthStr);
  formatStr = formatStr.replace(/DD/g, dayStr);
  formatStr = formatStr.replace(/hh/g, hourStr);
  formatStr = formatStr.replace(/mm/g, minuteStr);
  formatStr = formatStr.replace(/ss/g, secondStr);
  
  return formatStr;
};

export const unescapeHtml = target => {
  if( typeof target !== 'string' )
    return target;

  const patterns = {
    '&lt;'   : '<',
    '&gt;'   : '>',
    '&amp;'  : '&',
    '&quot;' : '"',
    '&#x27;' : '\'',
    '&#x60;' : '`',
    '&#x2F;'  : '/',
  };

  return target.replace(/&(lt|gt|amp|quot|#x27|#x60|#x2F);/g, match => {
    return patterns[match];
  });
};

export const deleteHtmlTag = htmlStr => {
  const pattern = new RegExp("<(\"[^\"]*\"|'[^']*'|[^'\">])*>", "g");

  return htmlStr.replace(pattern, "");
};

export const summarizeStr = str => {
  const charCount = 80;

  if( str && str.length < charCount-2 )
    return str;

  return str.slice(0, charCount - 2) + "…";
}