/
index.ts
856 lines (746 loc) · 23.6 KB
/
index.ts
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import { atob, btoa } from "js-base64";
export const createEndpoint = Symbol("workercom.endpoint");
export const releaseProxy = Symbol("workercom.releaseProxy");
const transfused = "workercom.transfused";
const throwError = Symbol("workercom.throwError");
type ProxyMethods = {
readonly [createEndpoint]: () => Promise<MessagePort>;
readonly [releaseProxy]: () => void;
};
type Promisify<T> = T extends Promise<unknown> ? T : Promise<T>;
type Unpromisify<P> = P extends Promise<infer T> ? T : P;
export type Remote<T> =
// Handle properties
RemoteObject<T> &
// Handle call signature (if present)
(T extends (...args: infer TArguments) => infer TReturn
? (
...args: {
readonly [I in keyof TArguments]: TArguments[I];
}
) => Promisify<Unpromisify<TReturn>>
: unknown) &
(T extends { new (...args: infer TArguments): infer TInstance }
? {
new (
...args: {
readonly [I in keyof TArguments]: TArguments[I];
}
): Promisify<Remote<TInstance>>;
}
: unknown) &
ProxyMethods;
type RemoteObject<T> = { readonly [P in keyof T]: RemoteProperty<T[P]> };
type RemoteProperty<T> =
// eslint-disable-next-line @typescript-eslint/ban-types
T extends Function ? Remote<T> : Promisify<T>;
// eslint-disable-next-line @typescript-eslint/ban-types
type LocalProperty<T> = T extends Function ? Local<T> : Unpromisify<T>;
type LocalObject<T> = { readonly [P in keyof T]: LocalProperty<T[P]> };
type MaybePromise<T> = Promise<T> | T;
type Local<T> = Omit<LocalObject<T>, keyof ProxyMethods> &
// Handle call signatures (if present)
(T extends (...args: infer TArguments) => infer TReturn
? (
...args: {
readonly [I in keyof TArguments]: TArguments[I];
}
) => MaybePromise<Unpromisify<TReturn>>
: unknown) &
(T extends { new (...args: infer TArguments): infer TInstance }
? {
new (
...args: {
readonly [I in keyof TArguments]: TArguments[I];
}
): MaybePromise<Local<Unpromisify<TInstance>>>;
}
: unknown);
enum MessageType {
GET = "get",
SET = "set",
APPLY = "apply",
CONSTRUCT = "construct",
ENDPOINT = "endpoint",
RELEASE = "release",
}
type EventSource = {
readonly addEventListener: (
type: string,
listener: EventListenerOrEventListenerObject,
// eslint-disable-next-line @typescript-eslint/ban-types
options?: {}
) => void;
readonly removeEventListener: (
type: string,
listener: EventListenerOrEventListenerObject,
// eslint-disable-next-line @typescript-eslint/ban-types
options?: {}
) => void;
};
type Endpoint = EventSource & {
// eslint-disable-next-line functional/no-method-signature
postMessage(message: unknown, transfer?: readonly Transferable[]): void;
readonly start?: () => void;
};
type Transfer<Source = unknown, To = Source> = {
// eslint-disable-next-line functional/no-method-signature, @typescript-eslint/no-explicit-any
canHandle(value: any): boolean;
// eslint-disable-next-line functional/no-method-signature
serialize(
value: Source,
parent: unknown
): readonly [To, (readonly Transferable[])?];
// eslint-disable-next-line functional/no-method-signature
deserialize(value: { readonly raw: To }): Source;
};
function generateUUID(): string {
return new Array(4)
.fill(0)
.map(() => Math.floor(Math.random() * Number.MAX_SAFE_INTEGER).toString(16))
.join("-");
}
// eslint-disable-next-line @typescript-eslint/ban-types
type Message = {} & (
| {
readonly type: MessageType.GET;
readonly path: readonly string[];
}
| {
readonly type: MessageType.SET;
readonly path: readonly string[];
readonly value: unknown;
}
| {
readonly type: MessageType.ENDPOINT;
}
| {
readonly type: MessageType.RELEASE;
}
| {
readonly type: MessageType.APPLY;
readonly path: readonly string[];
// eslint-disable-next-line functional/functional-parameters
readonly arguments: readonly unknown[];
}
| {
readonly type: MessageType.CONSTRUCT;
readonly path: readonly string[];
// eslint-disable-next-line functional/functional-parameters
readonly arguments: readonly unknown[];
}
);
function requestResponseMessage(
endpoint: Endpoint,
msg: Message,
transfers: readonly Transferable[] = []
): Promise<unknown> {
return new Promise((resolve) => {
const id = generateUUID();
// * handler response from worker by id
endpoint.addEventListener("message", function handler(
evt: MessageEvent
): void {
if (evt.data.id === id) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
endpoint.removeEventListener("message", handler as any);
resolve(evt.data.return);
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} as any);
if (endpoint.start) {
endpoint.start();
}
// * send request to worker
endpoint.postMessage(
{
id,
...msg,
},
transfers
);
});
}
export function wrap<T>(endpoint: Endpoint): Remote<T> {
return toProxy(endpoint);
}
function isMessagePort(port: Endpoint): port is MessagePort {
return port.constructor.name === "MessagePort";
}
function toProxy(
endpoint: Endpoint,
path: readonly (string | symbol)[] = [],
// eslint-disable-next-line @typescript-eslint/no-explicit-any
patch?: any
// eslint-disable-next-line @typescript-eslint/no-explicit-any
): any {
// eslint-disable-next-line @typescript-eslint/no-empty-function
const proxy = new Proxy(() => {}, {
get(_target, p) {
const valInPatch =
patch && path.slice(0, -1).reduce((obj, prop) => obj[prop], patch);
if (patch && p in valInPatch) {
return valInPatch;
}
if (p === "then") {
if (path.length === 0) {
return Promise.resolve(proxy);
}
return requestResponseMessage(endpoint, {
type: MessageType.GET,
path: path.map((item) => item.toString()),
}).then((ret) => argvMapToArguments([ret])[0]);
}
return toProxy(endpoint, [...path, p]);
},
set(_target, p, value) {
const argvMapValue = argumentsToArgvMap([value]);
if (patch) {
// eslint-disable-next-line functional/immutable-data
patch[p] = value;
return true;
}
void requestResponseMessage(
endpoint,
{
type: MessageType.SET,
path: [...path, p].map((item) => item.toString()),
value: argvMapValue.value,
},
argvMapValue.transfers
);
return true; // tấu hài đi vào lòng đất
},
apply(_target, _thisArg, argArray) {
const name = path[path.length - 1] || "";
if (name === createEndpoint) {
return requestResponseMessage(endpoint, {
type: MessageType.ENDPOINT,
}).then((ret) => argvMapToArguments([ret])[0]);
}
if (name === releaseProxy) {
return requestResponseMessage(endpoint, {
type: MessageType.RELEASE,
}).then(() => {
if (isMessagePort(endpoint)) {
endpoint.close();
}
});
}
if (name === "bind") {
return toProxy(endpoint, path.slice(0, -1));
}
if (name === "call") {
argArray = argArray.slice(1);
}
if (name === "apply") {
argArray = argArray[1];
}
const mapArgArray = argumentsToArgvMap(argArray);
return requestResponseMessage(
endpoint,
{
type: MessageType.APPLY,
arguments: mapArgArray.value,
path: path.map((item) =>
typeof item === "string" ? item : item.toString()
),
},
mapArgArray.transfers
).then((ret) => argvMapToArguments([ret])[0]);
},
construct(_target, argArray) {
const mapArgArray = argumentsToArgvMap(argArray);
return requestResponseMessage(
endpoint,
{
type: MessageType.CONSTRUCT,
arguments: mapArgArray.value,
path: path.map((item) =>
typeof item === "string" ? item : item.toString()
),
},
mapArgArray.transfers
).then((ret) => argvMapToArguments([ret])[0]);
},
// eslint-disable-next-line @typescript-eslint/no-explicit-any
}) as any;
return proxy;
}
export function expose(
obj: unknown,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
endpoint: Endpoint = self as any,
sf?: unknown
): void {
endpoint.addEventListener("message", function callback(
ev: MessageEvent
): void {
// eslint-disable-next-line functional/no-let
let returnValue: unknown;
// eslint-disable-next-line functional/no-let
let transfers: readonly Transferable[] = [];
try {
const parent = ev.data.path
.slice(0, -1)
// eslint-disable-next-line @typescript-eslint/no-explicit-any
.reduce((obj: any, prop: string) => obj[prop], obj);
const rawValue = ev.data.path.reduce(
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(obj: any, prop: string) => obj[prop],
obj
);
switch (ev.data.type) {
case MessageType.GET:
returnValue = rawValue;
break;
case MessageType.SET:
// eslint-disable-next-line functional/immutable-data
parent[ev.data.path[ev.data.path.length - 1]] = argvMapToArguments(
ev.data.value
)[0];
returnValue = true;
break;
case MessageType.APPLY:
returnValue = rawValue.call(
sf ?? parent,
...argvMapToArguments(ev.data.arguments || [])
);
break;
case MessageType.CONSTRUCT:
returnValue = new rawValue(...argvMapToArguments(ev.data.arguments));
break;
case MessageType.ENDPOINT:
// eslint-disable-next-line no-case-declarations
const { port1, port2 } = new MessageChannel();
expose(obj, port1);
returnValue = port2;
transfers = [port2];
break;
case MessageType.RELEASE:
break;
default:
return void 0;
}
} catch (err: any) {
// eslint-disable-next-line functional/immutable-data
err[throwError] = true;
returnValue = Promise.reject(err);
}
void Promise.resolve(returnValue)
.catch((err) => {
return err;
})
.then((ret) => {
const argvMapOfTheRet = argumentsToArgvMap([ret]);
endpoint.postMessage(
{
id: ev.data.id,
return: argvMapOfTheRet.value[0],
},
[...transfers, ...argvMapOfTheRet.transfers]
);
if (ev.data.type === MessageType.RELEASE) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
endpoint.removeEventListener("message", callback as any);
if (isMessagePort(endpoint)) {
endpoint.close();
}
}
});
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} as any);
if (endpoint.start) {
endpoint.start();
}
}
const transfersInstalled = new Map<string, Transfer<unknown, unknown>>();
export function installTransfer<Source, To>(
type: string,
transfer: Transfer<Source, To>
): void {
transfersInstalled.set(type, transfer);
}
function keys(obj: unknown, fulltext = true): readonly string[] {
if (Array.isArray(obj)) {
return new Array(obj.length).fill(0).map((_v, i) => i + "");
}
if (fulltext) {
const prototype = Object.getPrototypeOf(obj);
const props: readonly string[] = [
...new Set(
[
...Object.getOwnPropertyNames(obj),
...(Object.getPrototypeOf(prototype)
? Object.getOwnPropertyNames(prototype)
: []),
].filter(
(p, i, arr) =>
p !== "constructor" &&
p !== "__proto__" && //not the constructor
(i == 0 || p !== arr[i - 1])
)
),
];
return props;
}
return Object.getOwnPropertyNames(obj).filter(
(p, i, arr) =>
p !== "constructor" && //not the constructor
(i == 0 || p !== arr[i - 1])
);
}
function argumentsToArgvMap(
// eslint-disable-next-line @typescript-eslint/no-explicit-any
argvs: readonly any[],
// eslint-disable-next-line @typescript-eslint/no-explicit-any
parent: any = self,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
weakCache: WeakMap<any, any> | null = new WeakMap() // đây là trình quản lý cache để tránh lăp vô hạn object --- toàn bộ transfer đã tồn tại nếu dc cài đặt cache
): {
readonly value: readonly unknown[];
readonly transfers: readonly Transferable[];
} {
// eslint-disable-next-line functional/prefer-readonly-type
const argvMap: unknown[] = [];
// eslint-disable-next-line functional/prefer-readonly-type
const transfers: Transferable[] = [];
const { length } = argvs;
// eslint-disable-next-line functional/no-let
let index = 0;
// eslint-disable-next-line functional/no-loop-statement
whileMain: while (index < length) {
const argv = argvs[index];
if (weakCache?.has(argv)) {
// eslint-disable-next-line functional/immutable-data
argvMap[index] = weakCache.get(argv);
index++;
continue;
}
// eslint-disable-next-line functional/no-loop-statement
for (const [transferName, transfer] of transfersInstalled.entries()) {
if (transfer.canHandle(argv)) {
const sr = transfer.serialize(argv, parent);
const hydrated = {
transfer: transferName,
raw: sr[0],
[transfused]: true,
};
weakCache?.set(argv, hydrated);
// eslint-disable-next-line functional/immutable-data
transfers.push(...(sr[1] || []));
// eslint-disable-next-line functional/immutable-data
argvMap[index] = hydrated;
break whileMain;
}
}
if (argv && typeof argv === "object") {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const newArgvMapForArgv: any = Array.isArray(argv) ? [] : {};
weakCache?.set(argv, newArgvMapForArgv);
keys(argv).forEach((key) => {
if (key === "__proto__") {
return; // cuts
}
const mapArgv = argumentsToArgvMap([argv[key]], argv, weakCache);
// eslint-disable-next-line functional/immutable-data
newArgvMapForArgv[key] = mapArgv.value[0];
// eslint-disable-next-line functional/immutable-data
transfers.push(...mapArgv.transfers);
});
// eslint-disable-next-line functional/immutable-data
argvMap[index] = newArgvMapForArgv;
// }
index++;
continue;
}
// eslint-disable-next-line functional/immutable-data
argvMap[index] = argv;
index++;
}
weakCache = null;
return {
value: argvMap,
transfers,
};
}
function argvMapToArguments(
// eslint-disable-next-line @typescript-eslint/no-explicit-any
argvMaps: readonly any[],
// eslint-disable-next-line @typescript-eslint/no-explicit-any
weakCache: WeakMap<any, any> | null = new WeakMap() // đây là trình quản lý cache để tránh lăp vô hạn object
): readonly unknown[] {
// eslint-disable-next-line functional/prefer-readonly-type
const argvs: unknown[] = [];
const { length } = argvMaps;
// eslint-disable-next-line functional/no-let
let index = 0;
// eslint-disable-next-line functional/no-loop-statement
while (index < length) {
const argvMap = argvMaps[index];
if (weakCache?.has(argvMap)) {
// eslint-disable-next-line functional/immutable-data
argvs[index] = weakCache.get(argvMap);
index++;
continue;
}
if (argvMap?.[transfused]) {
/// exists transfer ?
if (transfersInstalled.has(argvMap.transfer)) {
// deserialize
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion, functional/immutable-data
argvs[index] = transfersInstalled
.get(argvMap.transfer)!
.deserialize(argvMap);
index++;
continue;
}
}
if (argvMap && typeof argvMap === "object") {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const newArgvForArgvMap: any = Array.isArray(argvMap) ? [] : {};
weakCache?.set(argvMap, newArgvForArgvMap);
keys(argvMap, false).forEach((key) => {
if (key === "__proto__") {
return; // cuts
}
// eslint-disable-next-line functional/immutable-data
newArgvForArgvMap[key] = argvMapToArguments(
[argvMap[key]],
weakCache
)[0];
});
// eslint-disable-next-line functional/immutable-data
argvs[index] = newArgvForArgvMap;
index++;
continue;
// }
}
// eslint-disable-next-line functional/immutable-data
argvs[index] = argvMap;
index++;
}
weakCache = null;
return argvs;
}
type PostMessageWithOrigin = {
readonly postMessage: (
message: unknown,
targetOrigin: string,
transfer?: readonly Transferable[]
) => void;
};
export function windowEndpoint(
w: PostMessageWithOrigin,
context: EventSource = self,
targetOrigin = "*"
): Endpoint {
return {
postMessage: (msg: unknown, transferables: readonly Transferable[]) =>
w.postMessage(msg, targetOrigin, transferables),
addEventListener: context.addEventListener.bind(context),
removeEventListener: context.removeEventListener.bind(context),
};
}
/** * Install transfer default * **/
installTransfer<
// eslint-disable-next-line @typescript-eslint/ban-types
Function,
{
readonly port: MessagePort;
readonly property: unknown;
readonly toString: string;
}
>("function", {
canHandle: (value) => typeof value === "function",
serialize: (fn, parent) => {
const { port1, port2 } = new MessageChannel();
expose(fn, port1, parent);
const { value, transfers } = argumentsToArgvMap([
Object.assign(Object.create(fn), {
prototype: undefined,
}),
]);
return [
{
port: port2,
property: value[0],
toString: fn.toString(),
},
[port2, ...transfers],
];
},
deserialize: ({ raw: { port, property, toString } }) => {
// eslint-disable-next-line @typescript-eslint/no-empty-function
const noop = () => {};
const proto: {
// eslint-disable-next-line @typescript-eslint/no-explicit-any, functional/prefer-readonly-type
[key: string]: any;
} = {
toString() {
return toString;
},
};
Object.getOwnPropertyNames(noop).forEach((prop) => {
// fix : TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them
switch (prop) {
case "caller":
case "calle":
// eslint-disable-next-line functional/immutable-data
proto[prop] = self;
break;
case "arguments":
// eslint-disable-next-line functional/immutable-data
proto[prop] = [];
break;
case "bind":
case "call":
case "apply":
break;
default:
if (typeof noop[prop as keyof typeof noop] === "function") {
// eslint-disable-next-line functional/immutable-data, @typescript-eslint/no-explicit-any
proto[prop] = (noop[prop as keyof typeof noop] as any).bind(noop);
} else {
// eslint-disable-next-line functional/immutable-data
proto[prop] = noop[prop as keyof typeof noop];
}
}
});
return toProxy(
port,
[],
// eslint-disable-next-line functional/immutable-data
Object.assign(proto, argvMapToArguments([property])[0])
);
},
});
installTransfer<
| Error
| {
readonly [throwError]: true;
readonly [prop: string]: unknown;
},
{
readonly isError: boolean;
readonly value:
| {
readonly message: string;
readonly name: string;
readonly stack: string;
readonly [prop: string]: unknown;
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
| any;
}
>("error", {
canHandle: (value) => value instanceof Error || value?.[throwError],
serialize: (value) => {
// eslint-disable-next-line functional/no-let, @typescript-eslint/no-explicit-any
let serialized: any;
if (value instanceof Error) {
serialized = {
isError: true,
value: {
message: value.message,
name: value.name,
stack: value.stack,
},
};
const props = keys(value);
props.forEach((prop) => {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (typeof (value as any)[prop] === "function") {
return; /// skip
}
// eslint-disable-next-line functional/immutable-data, @typescript-eslint/no-explicit-any
serialized.value[prop] = (value as any)[prop];
});
} else {
serialized = { isError: false, value };
}
return [serialized, []];
},
deserialize: ({ raw: serialized }) => {
if (serialized.isError) {
// eslint-disable-next-line functional/no-throw-statement
throw Object.assign(
new Error(serialized.value.message),
serialized.value
);
}
// eslint-disable-next-line functional/no-throw-statement
throw serialized.value;
},
});
function _arrayBufferToBase64(buffer: ArrayBuffer): string {
// eslint-disable-next-line functional/no-let
let binary = "";
const bytes = new Uint8Array(buffer);
const len = bytes.byteLength;
// eslint-disable-next-line functional/no-let
let i = 0;
// eslint-disable-next-line functional/no-loop-statement
while (i < len) {
binary += String.fromCharCode(bytes[i++]);
}
return btoa(binary);
}
function _base64ToArrayBuffer(base64: string): ArrayBuffer {
const binary_string = atob(base64);
const len = binary_string.length;
const bytes = new Uint8Array(len);
// eslint-disable-next-line functional/no-let
let i = 0;
// eslint-disable-next-line functional/no-loop-statement
while (i < len) {
// eslint-disable-next-line functional/immutable-data
bytes[i] = binary_string.charCodeAt(i++);
}
return bytes.buffer;
}
const TypedArrayConstructors = [
Int8Array,
Uint8Array,
Uint8ClampedArray,
Int16Array,
Uint16Array,
Int32Array,
Uint32Array,
Float32Array,
...(typeof BigInt64Array !== "undefined" ? [BigInt64Array] : []),
...(typeof BigUint64Array !== "undefined" ? [BigUint64Array] : []),
Float64Array,
];
function getNameTypedArrayConstructorUsed(typed: unknown) {
return TypedArrayConstructors.find(
(typedArrayItem) => typed instanceof typedArrayItem
)?.name;
}
installTransfer<ArrayBuffer, string>("arraybuffer", {
canHandle: (value) => value instanceof ArrayBuffer,
serialize: (value) => [_arrayBufferToBase64(value), []],
deserialize: ({ raw }) => _base64ToArrayBuffer(raw),
});
installTransfer<
typeof TypedArrayConstructors[0]["prototype"],
{
readonly typedArrayName: string;
readonly base64: string;
}
>("typedarray", {
canHandle: (value) => !!getNameTypedArrayConstructorUsed(value),
serialize: (value) => [
{
typedArrayName: getNameTypedArrayConstructorUsed(value) as string,
base64: _arrayBufferToBase64(value.buffer),
},
[],
],
deserialize: ({ raw }) => {
const typedArrayItem = TypedArrayConstructors.find(
(typedArrayItem) => typedArrayItem.name === raw.typedArrayName
) as typeof TypedArrayConstructors[0];
return new typedArrayItem(_base64ToArrayBuffer(raw.base64));
},
});