Login script for custom auth0 database to auth via WordPress XML-RPC

ReadMe.md

You must provide the following configuration variables:

1. WP_XMLRPC_URL = https://www.yourdomain.com/xmlrpc.php (replace with your domain and use http:// if you don't have SSL support)
2. WP_ADMIN_USER = admin (use your own admin username)
3. WP_ADMIN_PASSWORD = somepassword (use your own admin password)

getByEmail.js

function getByEmail (name, callback) {
  
  var xpath = require('xpath')
    , xmldom = require('xmldom')
    , xml2js = require('xml2js');
  var dom = xmldom.DOMParser;
  var builder = new xml2js.Builder();
  var reqXml = builder.buildObject({'methodCall':{
    'methodName':'wp.getUsers',
    'params':[
      {'param':{'value':{'i4':0}}}, 
      {'param':{'value':configuration.WP_ADMIN_USER}}, 
      {'param':{'value':configuration.WP_ADMIN_PASSWORD}}
     ]
  }});
  
  request.post({
    url:  configuration.WP_XMLRPC_URL,
    body: reqXml,
    encoding: 'utf8',
    method: 'POST',
    headers: { 'Content-Type' : 'application/xml' }
  }, function (err, response, body) {
  
    if (err) return callback(err);
    var parser = new xml2js.Parser();
    return parser.parseString(body, function(err, doc) {
      if(err) return callback(err);
      var mr = doc.methodResponse;
      if('fault' in mr) {
        if(mr.fault[0].value[0].struct[0].member[0].value[0].int[0] === '403') {
          return callback(new WrongUsernameOrPasswordError(configuration.WP_ADMIN_USER, mr.fault[0].value[0].struct[0].member[1].value[0].string[0]));
        } else {
          return callback(new Error(mr.fault[0].value[0].struct[0].member[1].value[0].string[0]));
        }
      } else {
        var userdatas = mr.params[0].param[0].value[0].array[0].data[0].value;
        var userlist = userdatas.map(function(userdata) {
            var result = {
              user_id: null,
              username: null,
              nickname: null,
              email: null,
              display_name: null,
              nicename: null,
              first_name: null,
              last_name: null
            };
        
            userdata.struct[0].member.forEach(function(prop) {
              if(prop.name[0] in result) {
                result[prop.name[0]] = prop.value[0].string[0];
              }
            });
          
            result.given_name = result.first_name;
            result.family_name = result.last_name;
          return result;
        });
        var matches = userlist.filter(function(u) { 
          return u.email === name || u.username === name;
        });
        if(matches.length > 0) {
          return callback(null, matches[0]);
        }
        return callback(new ValidationError("not-found", "No matching user found"));
      }
    });
  });
}

login.js

function login (email, password, callback) {
  var xpath = require('xpath')
    , xmldom = require('xmldom')
    , xml2js = require('xml2js');
  var dom = xmldom.DOMParser;
  var builder = new xml2js.Builder();
  var reqXml = builder.buildObject({'methodCall':{
    'methodName':'wp.getProfile',
    'params':[
      {'param':{'value':{'i4':0}}}, 
      {'param':{'value':email}}, 
      {'param':{'value':password}}
     ]
  }});
  
  request.post({
    url:  configuration.WP_XMLRPC_URL,
    body: reqXml,
    encoding: 'utf8',
    method: 'POST',
    headers: { 'Content-Type' : 'application/xml', 'Accept' : 'application/xml' }
  }, function (err, response, body) {
  
    if (err) return callback(err);
    var parser = new xml2js.Parser();
    return parser.parseString(body, function(err, doc) {
      if(err) return callback(err);
      var mr = doc.methodResponse;
      if(typeof(mr) === 'undefined') {
        throw new Error(JSON.stringify(mr)+" <-- "+body);
      }
      if('fault' in mr) {
        if(mr.fault[0].value[0].struct[0].member[0].value[0].int[0] === '403') {
          return callback(new WrongUsernameOrPasswordError(email, mr.fault[0].value[0].struct[0].member[1].value[0].string[0]));
        } else {
          return callback(new Error(mr.fault[0].value[0].struct[0].member[1].value[0].string[0]));
        }
      } else {
        var result = {
          user_id: null,
          username: null,
          nickname: null,
          email: null,
          email_verified: true
        };
        mr.params[0].param[0].value[0].struct[0].member.forEach(function(prop) {
          if(prop.name[0] in result) {
            result[prop.name[0]] = prop.value[0].string[0];
          }
        });
        if(result.user_id === null || 
           result.username === null || 
           result.nickname === null || 
           result.email === null) {
          return callback(new Error("Failed to parse login response: "+JSON.stringify(doc)));
        }
        return callback(null, result);
      }
    });
  });

}