successive_company_ids.js

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*/

const db = require('.');

let companyCodes = db.companies.map(company => company.code);
console.debug(`Checking ${companyCodes.length} Company IDs.`);

const allCompanyIDsAreSuccessive = companyCodes
  .filter(code => code !== 65535) // 65535 is Reserved.
  .every((code, i, arr) => {
    if (i === 0) 
        return true;
    
    console.debug(`Checking Company ID ${i}.`);
    const isSuccessiveID = code === (arr[i-1]) + 1;
    if (!isSuccessiveID) { 
        console.error(`Company ID #${i} was expected, but ${code} was found instead.`); 
    }    
    return isSuccessiveID;
  })

process.exit(allCompanyIDsAreSuccessive ? 0 : 1);