swagger client wrapper

client.js

var client = require("swagger-client");
var Promise = require("bluebird");
var _ = require('lodash');

function ServiceClient(url) {
  this.swagger = new Promise(function (resolve, reject) {
    var c = new client({
      url: url + '/swagger.json',
      success: function() {
        var iface = _.reduce(c.apis, function(acc, v, k) {
          return _.extend({}, acc, _.pick(v, _.keys(v.operations)));
        }, {});

        resolve(iface);
      }
    });

    c.fail = reject;
  });
}

ServiceClient.prototype.exec = function exec(operationId, params, callback) {

  function onExecSuccess(o) {
    var data, err;

    try {
      data = JSON.parse(o.data);
    }
    catch (thrown) {
      err = new Error('Error parsing response body-JSON');
    }

    callback(err || null, data);
  }

  function onExecFailure(o) {
    var err;

    if (o.status === 404) {
      err = null;
    }
    else if (!_.isEmpty(o.data)) {
      try {
        err = new Error((JSON.parse(o.data)).message);
      } catch (thrown) {
        err = new Error('Error parsing response body-JSON');
      }
    }
    else {
      err = new Error('Error calling service method ' + operationId);
    }

    callback(err, null);
  }

  this.swagger.then(function(iface) {
    iface[operationId].call(null, params, onExecSuccess, onExecFailure);
  });
}


///////////////////////////////////
// usage
////////

var video = new ServiceClient('http://localhost:3000');

video.exec('getVideoById', { videoId: 335817795531 }, function(err, video) {
  console.log('\nerr: ', err, ' payload: ', video);
});