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dont need this anymore

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Bruno Windels 2020-09-28 15:32:40 +02:00
parent 18cc34c082
commit bb58fa9b6c
1 changed files with 0 additions and 380 deletions
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380
src/utils/Promifill.js
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@ -1,380 +0,0 @@
"use strict";
const [PENDING, FULFILLED, REJECTED] =
[void 0, true, false];
export class Promifill {
get state () {
return PENDING;
}
get value () {
return void 0;
}
get settled () {
return false;
}
constructor (executor) {
if (typeof executor != "function") {
throw new TypeError(`Promise resolver ${Object.prototype.toString.call(executor)} is not a function`);
}
defineProperty(this, "chain", []);
defineProperty(this, "observers", []);
const secret = [];
const resolve =
(value, bypassKey) => {
if (this.settled && bypassKey !== secret) {
return;
}
defineProperty(this, "settled", true);
const then_ = value && value.then;
const thenable = typeof then_ == "function";
if (thenable) {
defineProperty(value, "preventThrow", true);
}
if (thenable && value.state === PENDING) {
then_.call(
value,
(v) =>
resolve(v, secret),
(r) =>
reject(r, secret)
);
} else {
defineProperty(this, "value",
thenable
? value.value
: value);
defineProperty(this, "state",
thenable
? value.state
: FULFILLED);
schedule(
this.observers.map((observer) => (
{
handler: this.state === FULFILLED
? observer.onfulfill
: observer.onreject,
value: this.value
}))
);
if (this.state === REJECTED) {
raiseUnhandledPromiseRejectionException(this.value, this);
}
}
};
const reject =
(reason, bypassKey) => {
if (this.settled && bypassKey !== secret) {
return;
}
defineProperty(this, "settled", true);
defineProperty(this, "value", reason);
defineProperty(this, "state", REJECTED);
schedule(
this.observers.map((observer) => (
{
handler: observer.onreject,
value: this.value
}))
);
raiseUnhandledPromiseRejectionException(this.value, this);
};
try {
executor(resolve, reject);
} catch (error) {
reject(error);
}
}
then (onfulfill, onreject) {
const chainedPromise = new this.constructor((resolve, reject) => {
const internalOnfulfill =
(value) => {
try {
resolve(
typeof onfulfill == "function"
? onfulfill(value)
: value
);
} catch (error) {
reject(error);
}
};
const internalOnreject =
(reason) => {
try {
if (typeof onreject == "function") {
resolve(onreject(reason));
} else {
reject(reason);
}
} catch (error) {
reject(error);
}
};
if (this.state === PENDING) {
this.observers.push({ onfulfill: internalOnfulfill, onreject: internalOnreject });
} else {
schedule(
[{
handler: this.state === FULFILLED
? internalOnfulfill
: internalOnreject,
value: this.value
}]
);
}
});
this.chain.push(chainedPromise);
return chainedPromise;
}
catch (onreject) {
return this.then(null, onreject);
}
finally (oncomplete) {
const chainedPromise = new this.constructor((resolve, reject) => {
const internalOncomplete =
() => {
try {
oncomplete();
if (this.state === FULFILLED) {
resolve(this.value);
} else {
reject(this.value);
}
} catch (error) {
reject(error);
}
};
if (this.state === PENDING) {
this.observers.push({ onfulfill: internalOncomplete, onreject: internalOncomplete });
} else {
schedule([{
handler: internalOncomplete
}]);
}
});
this.chain.push(chainedPromise);
return chainedPromise;
}
static resolve (value) {
return value && value.constructor === Promifill
? value
: new Promifill((resolve) => {
resolve(value);
});
}
static reject (reason) {
return new Promifill((_, reject) => {
reject(reason);
});
}
static all (iterable) {
return new Promifill((resolve, reject) => {
validateIterable(iterable);
let iterableSize = 0;
const values = [];
if (isEmptyIterable(iterable)) {
return resolve(values);
}
const add =
(value, index) => {
values[index] = value;
if (values.filter(() => true).length === iterableSize) {
resolve(values);
}
};
for (let item of iterable) {
((entry, index) => {
Promifill.resolve(entry)
.then(
(value) =>
add(value, index),
reject
);
})(item, iterableSize++);
}
});
}
static race (iterable) {
return new Promifill((resolve, reject) => {
validateIterable(iterable);
if (isEmptyIterable(iterable)) {
return;
}
for (let entry of iterable) {
Promifill.resolve(entry)
.then(resolve, reject);
}
});
}
static flushQueue() {
console.log("flushing promise queue sync");
schedule.flushQueue();
}
}
const defineProperty =
(obj, propName, propValue) => {
Object.defineProperty(obj, propName, { value: propValue });
};
const defer =
(handler) =>
(...args) => {
setTimeout(handler, 0, ...args);
};
const thrower =
(error) => {
throw error instanceof Error
? error
: new Error(error);
};
const raiseUnhandledPromiseRejectionException =
defer((error, promise) => {
if (promise.preventThrow || promise.chain.length > 0) {
return;
}
thrower(error);
});
class MutationObserverStrategy {
constructor (handler) {
const observer = new MutationObserver(handler);
const node = this.node =
document.createTextNode("");
observer.observe(node, { characterData: true });
}
trigger () {
this.node.data = this.node.data === 1
? 0
: 1;
}
}
class NextTickStrategy {
constructor (handler) {
this.scheduleNextTick =
() => process.nextTick(handler);
}
trigger () {
this.scheduleNextTick();
}
}
class BetterThanNothingStrategy {
constructor (handler) {
this.scheduleAsap =
() => setTimeout(handler, 0);
}
trigger () {
this.scheduleAsap();
}
}
const getStrategy =
() => {
if (typeof window != "undefined" && typeof window.MutationObserver == "function") {
return MutationObserverStrategy;
}
if (typeof global != "undefined" && typeof process != "undefined" && typeof process.nextTick == "function") {
return NextTickStrategy;
}
return BetterThanNothingStrategy;
};
const schedule =
(() => {
let microtasks = [];
const run =
() => {
let handler, value;
while (microtasks.length > 0 && ({ handler, value } = microtasks.shift())) {
handler(value);
}
};
const Strategy = getStrategy();
const ctrl = new Strategy(run);
const scheduleFn = (observers) => {
if (observers.length == 0) {
return;
}
microtasks = microtasks.concat(observers);
observers.length = 0;
ctrl.trigger();
};
scheduleFn.flushQueue = function() {
run();
};
return scheduleFn;
})();
const isIterable =
(subject) => subject != null && typeof subject[Symbol.iterator] == "function";
const validateIterable =
(subject) => {
if (isIterable(subject)) {
return;
}
throw new TypeError(`Cannot read property 'Symbol(Symbol.iterator)' of ${Object.prototype.toString.call(subject)}.`);
};
const isEmptyIterable =
(subject) => {
for (let _ of subject) { // eslint-disable-line no-unused-vars
return false;
}
return true;
};