spee.ch/server/controllers/api/claim/availability/checkClaimAvailability.js

const db = require('../../../../models/index');
const { publishing: { primaryClaimAddress, additionalClaimAddresses } } = require('../../../../../config/siteConfig.js');
const Sequelize = require('sequelize');
const Op = Sequelize.Op;

const claimAvailability = (name) => {
  const claimAddresses = additionalClaimAddresses || [];
  claimAddresses.push(primaryClaimAddress);
  // find any records where the name is used
  return db.Claim
    .findAll({
      attributes: ['address'],
      where     : {
        name,
        address: {
          [Op.or]: claimAddresses,
        },
      },
    })
    .then(result => {
      if (result.length >= 1) {
        throw new Error('That claim is already in use');
      }
      return name;
    })
    .catch(error => {
      throw error;
    });
};

module.exports = claimAvailability;