promise_array.js
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"use strict";
module.exports = function(Promise, INTERNAL, tryConvertToPromise,
apiRejection) {
var util = require("./util.js");
var isArray = util.isArray;
function toResolutionValue(val) {
switch(val) {
case -2: return [];
case -3: return {};
}
}
function PromiseArray(values) {
var promise = this._promise = new Promise(INTERNAL);
var parent;
if (values instanceof Promise) {
parent = values;
promise._propagateFrom(parent, 1 | 4);
}
this._values = values;
this._length = 0;
this._totalResolved = 0;
this._init(undefined, -2);
}
PromiseArray.prototype.length = function () {
return this._length;
};
PromiseArray.prototype.promise = function () {
return this._promise;
};
PromiseArray.prototype._init = function init(_, resolveValueIfEmpty) {
var values = tryConvertToPromise(this._values, this._promise);
if (values instanceof Promise) {
values._setBoundTo(this._promise._boundTo);
values = values._target();
this._values = values;
if (values._isFulfilled()) {
values = values._value();
if (!isArray(values)) {
var err = new Promise.TypeError("expecting an array, a promise or a thenable\u000a\u000a See http://goo.gl/s8MMhc\u000a");
this.__hardReject__(err);
return;
}
} else if (values._isPending()) {
values._then(
init,
this._reject,
undefined,
this,
resolveValueIfEmpty
);
return;
} else {
this._reject(values._reason());
return;
}
} else if (!isArray(values)) {
this._promise._reject(apiRejection("expecting an array, a promise or a thenable\u000a\u000a See http://goo.gl/s8MMhc\u000a")._reason());
return;
}
if (values.length === 0) {
if (resolveValueIfEmpty === -5) {
this._resolveEmptyArray();
}
else {
this._resolve(toResolutionValue(resolveValueIfEmpty));
}
return;
}
var len = this.getActualLength(values.length);
this._length = len;
this._values = this.shouldCopyValues() ? new Array(len) : this._values;
var promise = this._promise;
for (var i = 0; i < len; ++i) {
var isResolved = this._isResolved();
var maybePromise = tryConvertToPromise(values[i], promise);
if (maybePromise instanceof Promise) {
maybePromise = maybePromise._target();
if (isResolved) {
maybePromise._unsetRejectionIsUnhandled();
} else if (maybePromise._isPending()) {
maybePromise._proxyPromiseArray(this, i);
} else if (maybePromise._isFulfilled()) {
this._promiseFulfilled(maybePromise._value(), i);
} else {
this._promiseRejected(maybePromise._reason(), i);
}
} else if (!isResolved) {
this._promiseFulfilled(maybePromise, i);
}
}
};
PromiseArray.prototype._isResolved = function () {
return this._values === null;
};
PromiseArray.prototype._resolve = function (value) {
this._values = null;
this._promise._fulfill(value);
};
PromiseArray.prototype.__hardReject__ =
PromiseArray.prototype._reject = function (reason) {
this._values = null;
this._promise._rejectCallback(reason, false, true);
};
PromiseArray.prototype._promiseProgressed = function (progressValue, index) {
this._promise._progress({
index: index,
value: progressValue
});
};
PromiseArray.prototype._promiseFulfilled = function (value, index) {
this._values[index] = value;
var totalResolved = ++this._totalResolved;
if (totalResolved >= this._length) {
this._resolve(this._values);
}
};
PromiseArray.prototype._promiseRejected = function (reason, index) {
this._totalResolved++;
this._reject(reason);
};
PromiseArray.prototype.shouldCopyValues = function () {
return true;
};
PromiseArray.prototype.getActualLength = function (len) {
return len;
};
return PromiseArray;
};