text: "use strict";
  var __extends = (this && this.__extends) || function (d, b) {
      for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
      function __() { this.constructor = d; }
      d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  };
  var Observable_1 = require('../Observable');
  var tryCatch_1 = require('../util/tryCatch');
  var errorObject_1 = require('../util/errorObject');
  var AsyncSubject_1 = require('../AsyncSubject');
  /**
   * We need this JSDoc comment for affecting ESDoc.
   * @extends {Ignored}
   * @hide true
   */
  var BoundNodeCallbackObservable = (function (_super) {
      __extends(BoundNodeCallbackObservable, _super);
      function BoundNodeCallbackObservable(callbackFunc, selector, args, context, scheduler) {
          _super.call(this);
          this.callbackFunc = callbackFunc;
          this.selector = selector;
          this.args = args;
          this.context = context;
          this.scheduler = scheduler;
      }
      /* tslint:enable:max-line-length */
      /**
       * Converts a Node.js-style callback API to a function that returns an
       * Observable.
       *
       * <span class="informal">It's just like {@link bindCallback}, but the
       * callback is expected to be of type `callback(error, result)`.</span>
       *
       * `bindNodeCallback` is not an operator because its input and output are not
       * Observables. The input is a function `func` with some parameters, but the
       * last parameter must be a callback function that `func` calls when it is
       * done. The callback function is expected to follow Node.js conventions,
       * where the first argument to the callback is an error object, signaling
       * whether call was successful. If that object is passed to callback, it means
       * something went wrong.
       *
       * The output of `bindNodeCallback` is a function that takes the same
       * parameters as `func`, except the last one (the callback). When the output
       * function is called with arguments, it will return an Observable.
       * If `func` calls its callback with error parameter present, Observable will
       * error with that value as well. If error parameter is not passed, Observable will emit
       * second parameter. If there are more parameters (third and so on),
       * Observable will emit an array with all arguments, except first error argument.
       *
       * Optionally `bindNodeCallback` accepts selector function, which allows you to
       * make resulting Observable emit value computed by selector, instead of regular
       * callback arguments. It works similarly to {@link bindCallback} selector, but
       * Node.js-style error argument will never be passed to that function.
       *
       * Note that `func` will not be called at the same time output function is,
       * but rather whenever resulting Observable is subscribed. By default call to
       * `func` will happen synchronously after subscription, but that can be changed
       * with proper {@link Scheduler} provided as optional third parameter. Scheduler
       * can also control when values from callback will be emitted by Observable.
       * To find out more, check out documentation for {@link bindCallback}, where
       * Scheduler works exactly the same.
       *
       * As in {@link bindCallback}, context (`this` property) of input function will be set to context
       * of returned function, when it is called.
       *
       * After Observable emits value, it will complete immediately. This means
       * even if `func` calls callback again, values from second and consecutive
       * calls will never appear on the stream. If you need to handle functions
       * that call callbacks multiple times, check out {@link fromEvent} or
       * {@link fromEventPattern} instead.
       *
       * Note that `bindNodeCallback` can be used in non-Node.js environments as well.
       * "Node.js-style" callbacks are just a convention, so if you write for
       * browsers or any other environment and API you use implements that callback style,
       * `bindNodeCallback` can be safely used on that API functions as well.
       *
       * Remember that Error object passed to callback does not have to be an instance
       * of JavaScript built-in `Error` object. In fact, it does not even have to an object.
       * Error parameter of callback function is interpreted as "present", when value
       * of that parameter is truthy. It could be, for example, non-zero number, non-empty
       * string or boolean `true`. In all of these cases resulting Observable would error
       * with that value. This means usually regular style callbacks will fail very often when
       * `bindNodeCallback` is used. If your Observable errors much more often then you
       * would expect, check if callback really is called in Node.js-style and, if not,
       * switch to {@link bindCallback} instead.
       *
       * Note that even if error parameter is technically present in callback, but its value
       * is falsy, it still won't appear in array emitted by Observable or in selector function.
       *
       *
       * @example <caption>Read a file from the filesystem and get the data as an Observable</caption>
       * import * as fs from 'fs';
       * var readFileAsObservable = Rx.Observable.bindNodeCallback(fs.readFile);
       * var result = readFileAsObservable('./roadNames.txt', 'utf8');
       * result.subscribe(x => console.log(x), e => console.error(e));
       *
       *
       * @example <caption>Use on function calling callback with multiple arguments</caption>
       * someFunction((err, a, b) => {
       *   console.log(err); // null
       *   console.log(a); // 5
       *   console.log(b); // "some string"
       * });
       * var boundSomeFunction = Rx.Observable.bindNodeCallback(someFunction);
       * boundSomeFunction()
       * .subscribe(value => {
       *   console.log(value); // [5, "some string"]
       * });
       *
       *
       * @example <caption>Use with selector function</caption>
       * someFunction((err, a, b) => {
       *   console.log(err); // undefined
       *   console.log(a); // "abc"
       *   console.log(b); // "DEF"
       * });
       * var boundSomeFunction = Rx.Observable.bindNodeCallback(someFunction, (a, b) => a + b);
       * boundSomeFunction()
       * .subscribe(value => {
       *   console.log(value); // "abcDEF"
       * });
       *
       *
       * @example <caption>Use on function calling callback in regular style</caption>
       * someFunction(a => {
       *   console.log(a); // 5
       * });
       * var boundSomeFunction = Rx.Observable.bindNodeCallback(someFunction);
       * boundSomeFunction()
       * .subscribe(
       *   value => {}             // never gets called
       *   err => console.log(err) // 5
       *);
       *
       *
       * @see {@link bindCallback}
       * @see {@link from}
       * @see {@link fromPromise}
       *
       * @param {function} func Function with a Node.js-style callback as the last parameter.
       * @param {function} [selector] A function which takes the arguments from the
       * callback and maps those to a value to emit on the output Observable.
       * @param {Scheduler} [scheduler] The scheduler on which to schedule the
       * callbacks.
       * @return {function(...params: *): Observable} A function which returns the
       * Observable that delivers the same values the Node.js callback would
       * deliver.
       * @static true
       * @name bindNodeCallback
       * @owner Observable
       */
      BoundNodeCallbackObservable.create = function (func, selector, scheduler) {
          if (selector === void 0) { selector = undefined; }
          return function () {
              var args = [];
              for (var _i = 0; _i < arguments.length; _i++) {
                  args[_i - 0] = arguments[_i];
              }
              return new BoundNodeCallbackObservable(func, selector, args, this, scheduler);
          };
      };
      BoundNodeCallbackObservable.prototype._subscribe = function (subscriber) {
          var callbackFunc = this.callbackFunc;
          var args = this.args;
          var scheduler = this.scheduler;
          var subject = this.subject;
          if (!scheduler) {
              if (!subject) {
                  subject = this.subject = new AsyncSubject_1.AsyncSubject();
                  var handler = function handlerFn() {
                      var innerArgs = [];
                      for (var _i = 0; _i < arguments.length; _i++) {
                          innerArgs[_i - 0] = arguments[_i];
                      }
                      var source = handlerFn.source;
                      var selector = source.selector, subject = source.subject;
                      var err = innerArgs.shift();
                      if (err) {
                          subject.error(err);
                      }
                      else if (selector) {
                          var result_1 = tryCatch_1.tryCatch(selector).apply(this, innerArgs);
                          if (result_1 === errorObject_1.errorObject) {
                              subject.error(errorObject_1.errorObject.e);
                          }
                          else {
                              subject.next(result_1);
                              subject.complete();
                          }
                      }
                      else {
                          subject.next(innerArgs.length <= 1 ? innerArgs[0] : innerArgs);
                          subject.complete();
                      }
                  };
                  // use named function instance to avoid closure.
                  handler.source = this;
                  var result = tryCatch_1.tryCatch(callbackFunc).apply(this.context, args.concat(handler));
                  if (result === errorObject_1.errorObject) {
                      subject.error(errorObject_1.errorObject.e);
                  }
              }
              return subject.subscribe(subscriber);
          }
          else {
              return scheduler.schedule(dispatch, 0, { source: this, subscriber: subscriber, context: this.context });
          }
      };
      return BoundNodeCallbackObservable;
  }(Observable_1.Observable));
  exports.BoundNodeCallbackObservable = BoundNodeCallbackObservable;
  function dispatch(state) {
      var self = this;
      var source = state.source, subscriber = state.subscriber, context = state.context;
      // XXX: cast to `any` to access to the private field in `source`.
      var _a = source, callbackFunc = _a.callbackFunc, args = _a.args, scheduler = _a.scheduler;
      var subject = source.subject;
      if (!subject) {
          subject = source.subject = new AsyncSubject_1.AsyncSubject();
          var handler = function handlerFn() {
              var innerArgs = [];
              for (var _i = 0; _i < arguments.length; _i++) {
                  innerArgs[_i - 0] = arguments[_i];
              }
              var source = handlerFn.source;
              var selector = source.selector, subject = source.subject;
              var err = innerArgs.shift();
              if (err) {
                  self.add(scheduler.schedule(dispatchError, 0, { err: err, subject: subject }));
              }
              else if (selector) {
                  var result_2 = tryCatch_1.tryCatch(selector).apply(this, innerArgs);
                  if (result_2 === errorObject_1.errorObject) {
                      self.add(scheduler.schedule(dispatchError, 0, { err: errorObject_1.errorObject.e, subject: subject }));
                  }
                  else {
                      self.add(scheduler.schedule(dispatchNext, 0, { value: result_2, subject: subject }));
                  }
              }
              else {
                  var value = innerArgs.length <= 1 ? innerArgs[0] : innerArgs;
                  self.add(scheduler.schedule(dispatchNext, 0, { value: value, subject: subject }));
              }
          };
          // use named function to pass values in without closure
          handler.source = source;
          var result = tryCatch_1.tryCatch(callbackFunc).apply(context, args.concat(handler));
          if (result === errorObject_1.errorObject) {
              self.add(scheduler.schedule(dispatchError, 0, { err: errorObject_1.errorObject.e, subject: subject }));
          }
      }
      self.add(subject.subscribe(subscriber));
  }
  function dispatchNext(arg) {
      var value = arg.value, subject = arg.subject;
      subject.next(value);
      subject.complete();
  }
  function dispatchError(arg) {
      var err = arg.err, subject = arg.subject;
      subject.error(err);
  }
  //# sourceMappingURL=BoundNodeCallbackObservable.js.map