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Viewing file:     email-template.js (855 B)      -rw-r--r--

'use strict';

const _ = require('lodash');

const invalidPatternsRegexes = [/<%[^=]([^<>%]*)%>/m, /\${([^{}]*)}/m];
const authorizedKeys = ['URL', 'CODE', 'USER', 'USER.email', 'USER.username', 'TOKEN'];

const matchAll = (pattern, src) => {
  const matches = [];
  let match;

  const regexPatternWithGlobal = RegExp(pattern, 'g');
  while ((match = regexPatternWithGlobal.exec(src))) {
    const [, group] = match;

    matches.push(_.trim(group));
  }
  return matches;
};

const isValidEmailTemplate = template => {
  for (let reg of invalidPatternsRegexes) {
    if (reg.test(template)) {
      return false;
    }
  }

  const matches = matchAll(/<%=([^<>%=]*)%>/, template);
  for (const match of matches) {
    if (!authorizedKeys.includes(match)) {
      return false;
    }
  }

  return true;
};

module.exports = {
  isValidEmailTemplate,
};