@dnb/eufemia/components/input-masked/addons/emailMask.js

DNB Eufemia Design System UI Library

import _pushInstanceProperty from "core-js-pure/stable/instance/push.js";
import emailPipe from "./emailPipe.js";
const asterisk = '*';
const dot = '.';
const emptyString = '';
const atSymbol = '@';
const caretTrap = '[]';
const space = ' ';
const g = 'g';
const anyNonWhitespaceRegExp = /[^\s]/;
const anyNonDotOrWhitespaceRegExp = /[^.\s]/;
const allWhitespaceRegExp = /\s/g;
function emailMask(rawValue, config) {
  rawValue = rawValue.replace(allWhitespaceRegExp, emptyString);
  const {
    placeholderChar,
    currentCaretPosition
  } = config;
  const indexOfFirstAtSymbol = rawValue.indexOf(atSymbol);
  const indexOfLastDot = rawValue.lastIndexOf(dot);
  const indexOfTopLevelDomainDot = indexOfLastDot < indexOfFirstAtSymbol ? -1 : indexOfLastDot;
  const localPartToDomainConnector = getConnector(rawValue, indexOfFirstAtSymbol + 1, atSymbol);
  const domainNameToTopLevelDomainConnector = getConnector(rawValue, indexOfTopLevelDomainDot - 1, dot);
  const localPartStr = getLocalPart(rawValue, indexOfFirstAtSymbol);
  const domainNameStr = getDomainName(rawValue, indexOfFirstAtSymbol, indexOfTopLevelDomainDot, placeholderChar);
  const topLevelDomainStr = getTopLevelDomain(rawValue, indexOfTopLevelDomainDot, placeholderChar, currentCaretPosition);
  const localPart = convertToMask(localPartStr);
  const domainName = convertToMask(domainNameStr);
  const topLevelDomain = convertToMask(topLevelDomainStr, true);
  const mask = localPart.concat(localPartToDomainConnector).concat(domainName).concat(domainNameToTopLevelDomainConnector).concat(topLevelDomain);
  return mask;
}
function getConnector(rawValue, indexOfConnection, connectionSymbol) {
  const connector = [];
  if (rawValue[indexOfConnection] === connectionSymbol) {
    _pushInstanceProperty(connector).call(connector, connectionSymbol);
  } else {
    _pushInstanceProperty(connector).call(connector, caretTrap, connectionSymbol);
  }
  _pushInstanceProperty(connector).call(connector, caretTrap);
  return connector;
}
function getLocalPart(rawValue, indexOfFirstAtSymbol) {
  if (indexOfFirstAtSymbol === -1) {
    return rawValue;
  } else {
    return rawValue.slice(0, indexOfFirstAtSymbol);
  }
}
function getDomainName(rawValue, indexOfFirstAtSymbol, indexOfTopLevelDomainDot, placeholderChar) {
  let domainName = emptyString;
  if (indexOfFirstAtSymbol !== -1) {
    if (indexOfTopLevelDomainDot === -1) {
      domainName = rawValue.slice(indexOfFirstAtSymbol + 1, rawValue.length);
    } else {
      domainName = rawValue.slice(indexOfFirstAtSymbol + 1, indexOfTopLevelDomainDot);
    }
  }
  domainName = domainName.replace(new RegExp(`[\\s${placeholderChar}]`, g), emptyString);
  if (domainName === atSymbol) {
    return asterisk;
  } else if (domainName.length < 1) {
    return space;
  } else if (domainName[domainName.length - 1] === dot) {
    return domainName.slice(0, domainName.length - 1);
  } else {
    return domainName;
  }
}
function getTopLevelDomain(rawValue, indexOfTopLevelDomainDot, placeholderChar, currentCaretPosition) {
  let topLevelDomain = emptyString;
  if (indexOfTopLevelDomainDot !== -1) {
    topLevelDomain = rawValue.slice(indexOfTopLevelDomainDot + 1, rawValue.length);
  }
  topLevelDomain = topLevelDomain.replace(new RegExp(`[\\s${placeholderChar}.]`, g), emptyString);
  if (topLevelDomain.length === 0) {
    return rawValue[indexOfTopLevelDomainDot - 1] === dot && currentCaretPosition !== rawValue.length ? asterisk : emptyString;
  } else {
    return topLevelDomain;
  }
}
function convertToMask(str, noDots) {
  return str.split(emptyString).map(char => char === space ? char : noDots ? anyNonDotOrWhitespaceRegExp : anyNonWhitespaceRegExp);
}
export default {
  mask: emailMask,
  pipe: emailPipe
};
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