Version 1

[yaffs-website] / node_modules / es6-promise / lib / es6-promise / enumerator.js

diff --git a/node_modules/es6-promise/lib/es6-promise/enumerator.js b/node_modules/es6-promise/lib/es6-promise/enumerator.js
new file mode 100644 (file)
index 0000000..ca8b05e
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+import {
+  isArray,
+  isMaybeThenable
+} from './utils';
+
+import {
+  noop,
+  reject,
+  fulfill,
+  subscribe,
+  FULFILLED,
+  REJECTED,
+  PENDING,
+  getThen,
+  handleMaybeThenable
+} from './-internal';
+
+import then from './then';
+import Promise from './promise';
+import originalResolve from './promise/resolve';
+import originalThen from './then';
+import { makePromise, PROMISE_ID } from './-internal';
+
+export default Enumerator;
+function Enumerator(Constructor, input) {
+  this._instanceConstructor = Constructor;
+  this.promise = new Constructor(noop);
+
+  if (!this.promise[PROMISE_ID]) {
+    makePromise(this.promise);
+  }
+
+  if (isArray(input)) {
+    this._input     = input;
+    this.length     = input.length;
+    this._remaining = input.length;
+
+    this._result = new Array(this.length);
+
+    if (this.length === 0) {
+      fulfill(this.promise, this._result);
+    } else {
+      this.length = this.length || 0;
+      this._enumerate();
+      if (this._remaining === 0) {
+        fulfill(this.promise, this._result);
+      }
+    }
+  } else {
+    reject(this.promise, validationError());
+  }
+}
+
+function validationError() {
+  return new Error('Array Methods must be provided an Array');
+};
+
+Enumerator.prototype._enumerate = function() {
+  let { length, _input } = this;
+
+  for (let i = 0; this._state === PENDING && i < length; i++) {
+    this._eachEntry(_input[i], i);
+  }
+};
+
+Enumerator.prototype._eachEntry = function(entry, i) {
+  let c = this._instanceConstructor;
+  let { resolve } = c;
+
+  if (resolve === originalResolve) {
+    let then = getThen(entry);
+
+    if (then === originalThen &&
+        entry._state !== PENDING) {
+      this._settledAt(entry._state, i, entry._result);
+    } else if (typeof then !== 'function') {
+      this._remaining--;
+      this._result[i] = entry;
+    } else if (c === Promise) {
+      let promise = new c(noop);
+      handleMaybeThenable(promise, entry, then);
+      this._willSettleAt(promise, i);
+    } else {
+      this._willSettleAt(new c(resolve => resolve(entry)), i);
+    }
+  } else {
+    this._willSettleAt(resolve(entry), i);
+  }
+};
+
+Enumerator.prototype._settledAt = function(state, i, value) {
+  let { promise } = this;
+
+  if (promise._state === PENDING) {
+    this._remaining--;
+
+    if (state === REJECTED) {
+      reject(promise, value);
+    } else {
+      this._result[i] = value;
+    }
+  }
+
+  if (this._remaining === 0) {
+    fulfill(promise, this._result);
+  }
+};
+
+Enumerator.prototype._willSettleAt = function(promise, i) {
+  let enumerator = this;
+
+  subscribe(promise, undefined, value => enumerator._settledAt(FULFILLED, i, value),
+                               reason => enumerator._settledAt(REJECTED, i, reason));
+};