slack/src/_validate.js

Slack API client written in JS

var api = require('./api.json')

module.exports = function validate(method, params) {
  // get all the requried params for this method
  let required = api[method]
  // collect any missing params
  let missing = required.filter(param=> typeof params[param] === 'undefined')
  // optimistic: assume the best but have a plan for the worst
  return missing.length? Error(`${method} missing params: ${missing.join(', ')}`) : false
}