[Utils] Useful codes #utils

FormatJson.js

function formatJson (json, options) {
  let reg = null;
  let formatted = '';
  let pad = 0;
  let PADDING = '    ';
  options = options || {};
  options.newlineAfterColonIfBeforeBraceOrBracket = options.newlineAfterColonIfBeforeBraceOrBracket === true;
  options.spaceAfterColon = options.spaceAfterColon === false;
  if (typeof json !== 'string') {
    json = JSON.stringify(json);
  } else {
    json = JSON.parse(json);
    json = JSON.stringify(json);
  }
  reg = /([{}])/g;
  json = json.replace(reg, '\r\n$1\r\n');
  reg = /([[\]])/g;
  json = json.replace(reg, '\r\n$1\r\n');
  reg = /(,)/g;
  json = json.replace(reg, '$1\r\n');
  reg = /(\r\n\r\n)/g;
  json = json.replace(reg, '\r\n');
  reg = /\r\n,/g;
  json = json.replace(reg, ',');
  if (!options.newlineAfterColonIfBeforeBraceOrBracket) {
    reg = /:\r\n\{/g;
    json = json.replace(reg, ':{');
    reg = /:\r\n\[/g;
    json = json.replace(reg, ':[');
  }
  if (options.spaceAfterColon) {
    reg = /:/g;
    json = json.replace(reg, ':');
  }
  (json.split('\r\n')).forEach((node, index) => {
    let i = 0;
    let indent = 0;
    let padding = '';

    if (node.match(/\{$/) || node.match(/\[$/)) {
      indent = 1;
    } else if (node.match(/\}/) || node.match(/\]/)) {
      if (pad !== 0) {
        pad -= 1;
      }
    } else {
      indent = 0;
    }

    for (i = 0; i < pad; i++) {
      padding += PADDING;
    }

    formatted += padding + node + '\r\n';
    pad += indent;
  });
  return formatted;
}