pouchdb-find/test/test-abstract-mapreduce/utils.js

Easy-to-use query language for PouchDB

'use strict';
/* istanbul ignore if */
if (typeof global.Promise === 'function') {
  exports.Promise = global.Promise;
} else {
  exports.Promise = require('lie');
}

exports.inherits = require('inherits');
exports.extend = require('pouchdb-extend');
var argsarray = require('argsarray');

exports.promisedCallback = function (promise, callback) {
  if (callback) {
    promise.then(function (res) {
      process.nextTick(function () {
        callback(null, res);
      });
    }, function (reason) {
      process.nextTick(function () {
        callback(reason);
      });
    });
  }
  return promise;
};

exports.callbackify = function (fun) {
  return argsarray(function (args) {
    var cb = args.pop();
    var promise = fun.apply(this, args);
    if (typeof cb === 'function') {
      exports.promisedCallback(promise, cb);
    }
    return promise;
  });
};

// Promise finally util similar to Q.finally
exports.fin = function (promise, cb) {
  return promise.then(function (res) {
    var promise2 = cb();
    if (typeof promise2.then === 'function') {
      return promise2.then(function () {
        return res;
      });
    }
    return res;
  }, function (reason) {
    var promise2 = cb();
    /* istanbul ignore next */
    if (typeof promise2.then === 'function') {
      return promise2.then(function () {
        throw reason;
      });
    }
    throw reason;
  });
};