data-transport
Version:
A simple and responsive transport
217 lines • 28.4 kB
JavaScript
import { __assign, __awaiter, __extends, __generator, __rest } from "tslib";
import { callbackKey, prefixKey } from '../constant';
import { getAction, Transport } from '../transport';
var connectEventName = 'sharedworker-connect';
var disconnectEventName = 'sharedworker-disconnect';
var SharedWorkerClientTransport = /** @class */ (function (_super) {
__extends(SharedWorkerClientTransport, _super);
function SharedWorkerClientTransport(_options) {
var _this = this;
var worker = _options.worker, _a = _options.listener, listener = _a === void 0 ? function (callback) {
var handler = function (_a) {
var data = _a.data;
callback(data);
};
worker.port.addEventListener('message', handler);
worker.port.start();
return function () {
worker.port.removeEventListener('message', handler);
};
} : _a, _b = _options.sender, sender = _b === void 0 ? function (message) {
var _a;
var transfer = (_a = message.transfer) !== null && _a !== void 0 ? _a : [];
delete message.transfer;
worker.port.postMessage(message, transfer);
} : _b, options = __rest(_options, ["worker", "listener", "sender"]);
_this = _super.call(this, __assign(__assign({}, options), { listener: listener, sender: sender })) || this;
_this._connected = false;
_this._onConnectCallback = new Set();
// do not use `unload` event
// https://developer.chrome.com/docs/web-platform/deprecating-unload
window.addEventListener('pagehide', function () {
// @ts-ignore
_this.emit({ name: disconnectEventName, respond: false }, _this.id);
});
// @ts-ignore
_this.listen(connectEventName, function () { return __awaiter(_this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
Promise.resolve().then(function () {
_this._handleConnect();
});
return [2 /*return*/, this.id];
});
}); });
// ensure the connect event is sent when the client connect to the worker
// @ts-ignore
_this.emit({ name: connectEventName, respond: false, silent: true });
return _this;
}
SharedWorkerClientTransport.prototype._handleConnect = function () {
if (this._connected)
return;
this._connected = true;
this._onConnectCallback.forEach(function (callback) {
callback();
});
};
SharedWorkerClientTransport.prototype.onConnect = function (callback) {
var _this = this;
this._onConnectCallback.add(callback);
return function () {
_this._onConnectCallback.delete(callback);
};
};
return SharedWorkerClientTransport;
}(Transport));
export { SharedWorkerClientTransport };
var SharedWorkerInternalTransport = /** @class */ (function (_super) {
__extends(SharedWorkerInternalTransport, _super);
function SharedWorkerInternalTransport(_options) {
if (_options === void 0) { _options = {}; }
var _this = this;
var _a = _options.listener, listener = _a === void 0 ? function (callback) {
var _this = this;
this[callbackKey] = callback;
return function () {
_this.ports.forEach(function (port) {
port._handler && port.removeEventListener('message', port._handler);
delete port._handler;
});
self.close();
};
} : _a, _b = _options.sender, sender = _b === void 0 ? function (message) {
var _a, _b;
var transfer = (_a = message.transfer) !== null && _a !== void 0 ? _a : [];
delete message.transfer;
var port = (_b = message._extra) === null || _b === void 0 ? void 0 : _b._port;
// pick a client port for sender.
if (port) {
delete message._extra._port;
port.postMessage(message, transfer);
}
else if (message.type === 'response' &&
// @ts-ignore
_this.ports.has(message.requestId)) {
// @ts-ignore
var port_1 = _this.ports.get(message.requestId);
port_1.postMessage(message, transfer);
}
else {
_this.ports.forEach(function (port) {
try {
port.postMessage(message, transfer);
}
catch (error) {
console.error(error);
}
});
_this.tempPorts.forEach(function (port) {
try {
port.postMessage(message, transfer);
}
catch (error) {
console.error(error);
}
});
}
} : _b, options = __rest(_options, ["listener", "sender"]);
_this = _super.call(this, __assign(__assign({}, options), { listener: listener, sender: sender })) || this;
_this.ports = new Map();
_this.tempPorts = new Set();
_this._onConnectCallback = new Set();
_this._onDisconnectCallback = new Set();
var disconnectAction = getAction(_this[prefixKey], disconnectEventName);
var connectEvent = getAction(_this[prefixKey], connectEventName);
self.addEventListener('connect', function (e) { return __awaiter(_this, void 0, void 0, function () {
var port, id, err_1;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
port = e.ports[0];
port._handler = function (_a) {
var _b;
var data = _a.data;
if (data.hasRespond) {
data._extra = (_b = data._extra) !== null && _b !== void 0 ? _b : {};
data._extra._port = port;
}
if (data.action === disconnectAction &&
_this.ports.has(data.requestId)) {
// clear port and clientId when the port's client is disconnected.
_this.ports.delete(data.requestId);
_this._onDisconnectCallback.forEach(function (callback) {
callback(data.requestId);
});
}
if (data.type === 'request' && data.action === connectEvent) {
_this.emit({
// @ts-ignore
name: connectEventName,
_extra: { _port: port },
silent: true,
respond: false,
});
_this._handleConnect(data.requestId, port);
}
_this[callbackKey](data);
};
port.addEventListener('message', port._handler);
port.start();
this.tempPorts.add(port);
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
return [4 /*yield*/, this.emit({
// @ts-ignore
name: connectEventName,
_extra: { _port: port },
silent: true,
})];
case 2:
id = _a.sent();
this._handleConnect(id, port);
return [3 /*break*/, 4];
case 3:
err_1 = _a.sent();
this.tempPorts.delete(port);
console.error(err_1);
return [3 /*break*/, 4];
case 4: return [2 /*return*/];
}
});
}); });
return _this;
}
SharedWorkerInternalTransport.prototype.onConnect = function (callback) {
var _this = this;
this._onConnectCallback.add(callback);
return function () {
_this._onConnectCallback.delete(callback);
};
};
SharedWorkerInternalTransport.prototype._handleConnect = function (id, port) {
if (id && !this.ports.has(id)) {
this.ports.set(id, port);
this.tempPorts.delete(port);
this._onConnectCallback.forEach(function (callback) {
callback(id);
});
}
};
SharedWorkerInternalTransport.prototype.onDisconnect = function (callback) {
var _this = this;
this._onDisconnectCallback.add(callback);
return function () {
_this._onDisconnectCallback.delete(callback);
};
};
return SharedWorkerInternalTransport;
}(Transport));
export { SharedWorkerInternalTransport };
export var SharedWorkerTransport = {
Client: SharedWorkerClientTransport,
Worker: SharedWorkerInternalTransport,
};
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{ callbackKey, prefixKey } from '../constant';\nimport { listen } from '../decorators';\nimport {\n  TransportOptions,\n  TransferableWorker,\n  ListenerOptions,\n  BaseInteraction,\n} from '../interface';\nimport { getAction, Transport } from '../transport';\n\ndeclare var self: SharedWorkerGlobalScope;\ninterface SharedWorkerPort extends TransferableWorker {\n  _port?: MessagePort;\n}\n\nexport interface SharedWorkerClientTransportOptions\n  extends Partial<TransportOptions<TransferableWorker>> {\n  /**\n   * Pass a shared worker instance for data transport.\n   */\n  worker: SharedWorker;\n}\n\ntype ClientCallback = () => void | Promise<void>;\ntype WorkerCallback = (clientId: string) => void | Promise<void>;\n\nconst connectEventName = 'sharedworker-connect';\nconst disconnectEventName = 'sharedworker-disconnect';\n\nexport interface SharedWorkerInternalTransportOptions\n  extends Partial<TransportOptions<SharedWorkerPort>> {}\n\nexport abstract class SharedWorkerClientTransport<\n  T extends BaseInteraction = any\n> extends Transport<T> {\n  constructor(_options: SharedWorkerClientTransportOptions) {\n    const {\n      worker,\n      listener = (callback) => {\n        const handler = ({\n          data,\n        }: MessageEvent<ListenerOptions<TransferableWorker>>) => {\n          callback(data);\n        };\n        worker.port.addEventListener('message', handler);\n        worker.port.start();\n        return () => {\n          worker.port.removeEventListener('message', handler);\n        };\n      },\n      sender = (message) => {\n        const transfer = message.transfer ?? [];\n        delete message.transfer;\n        worker.port.postMessage(message, transfer);\n      },\n      ...options\n    } = _options;\n    super({\n      ...options,\n      listener,\n      sender,\n    });\n    // do not use `unload` event\n    // https://developer.chrome.com/docs/web-platform/deprecating-unload\n    window.addEventListener('pagehide', () => {\n      // @ts-ignore\n      this.emit({ name: disconnectEventName, respond: false }, this.id);\n    });\n    // @ts-ignore\n    this.listen(connectEventName, async () => {\n      Promise.resolve().then(() => {\n        this._handleConnect();\n      });\n      return this.id;\n    });\n    // ensure the connect event is sent when the client connect to the worker\n    // @ts-ignore\n    this.emit({ name: connectEventName, respond: false, silent: true });\n  }\n\n  private _handleConnect() {\n    if (this._connected) return;\n    this._connected = true;\n    this._onConnectCallback.forEach((callback) => {\n      callback();\n    });\n  }\n\n  private _connected = false;\n\n  private _onConnectCallback = new Set<ClientCallback>();\n\n  onConnect(callback: ClientCallback) {\n    this._onConnectCallback.add(callback);\n    return () => {\n      this._onConnectCallback.delete(callback);\n    };\n  }\n}\n\ninterface SharedWorkerTransportPort extends MessagePort {\n  _handler?: (options: MessageEvent<ListenerOptions<SharedWorkerPort>>) => void;\n}\n\nexport abstract class SharedWorkerInternalTransport<\n  T extends BaseInteraction = any\n> extends Transport<T> {\n  protected ports = new Map<string, MessagePort>();\n  protected tempPorts = new Set<MessagePort>();\n  private [callbackKey]!: (options: ListenerOptions<SharedWorkerPort>) => void;\n\n  constructor(_options: SharedWorkerInternalTransportOptions = {}) {\n    const {\n      listener = function (this: SharedWorkerInternalTransport, callback) {\n        this[callbackKey] = callback;\n        return () => {\n          this.ports.forEach((port: SharedWorkerTransportPort) => {\n            port._handler && port.removeEventListener('message', port._handler);\n            delete port._handler;\n          });\n          self.close();\n        };\n      },\n      sender = (message) => {\n        const transfer = message.transfer ?? [];\n        delete message.transfer;\n        const port = message._extra?._port;\n        // pick a client port for sender.\n        if (port) {\n          delete message._extra!._port;\n          port.postMessage(message, transfer);\n        } else if (\n          message.type === 'response' &&\n          // @ts-ignore\n          this.ports.has(message.requestId)\n        ) {\n          // @ts-ignore\n          const port = this.ports.get(message.requestId)!;\n          port.postMessage(message, transfer);\n        } else {\n          this.ports.forEach((port) => {\n            try {\n              port.postMessage(message, transfer);\n            } catch (error) {\n              console.error(error);\n            }\n          });\n          this.tempPorts.forEach((port) => {\n            try {\n              port.postMessage(message, transfer);\n            } catch (error) {\n              console.error(error);\n            }\n          });\n        }\n      },\n      ...options\n    } = _options;\n    super({\n      ...options,\n      listener,\n      sender,\n    });\n\n    const disconnectAction = getAction(this[prefixKey]!, disconnectEventName);\n    const connectEvent = getAction(this[prefixKey]!, connectEventName);\n    self.addEventListener('connect', async (e) => {\n      const port: SharedWorkerTransportPort = e.ports[0];\n      port._handler = ({\n        data,\n      }: MessageEvent<ListenerOptions<SharedWorkerPort>>) => {\n        if (data.hasRespond) {\n          data._extra = data._extra ?? {};\n          data._extra._port = port;\n        }\n        if (\n          data.action === disconnectAction &&\n          this.ports.has(data.requestId)\n        ) {\n          // clear port and clientId when the port's client is disconnected.\n          this.ports.delete(data.requestId);\n          this._onDisconnectCallback.forEach((callback) => {\n            callback(data.requestId);\n          });\n        }\n        if (data.type === 'request' && data.action === connectEvent) {\n          this.emit({\n            // @ts-ignore\n            name: connectEventName,\n            _extra: { _port: port },\n            silent: true,\n            respond: false,\n          });\n          this._handleConnect(data.requestId, port);\n        }\n        this[callbackKey](data);\n      };\n      port.addEventListener('message', port._handler);\n      port.start();\n      this.tempPorts.add(port);\n      try {\n        // because parameters is unknown\n        // @ts-ignore\n        const id: string = await this.emit({\n          // @ts-ignore\n          name: connectEventName,\n          _extra: { _port: port },\n          silent: true,\n        });\n        this._handleConnect(id, port);\n      } catch (err) {\n        this.tempPorts.delete(port);\n        console.error(err);\n      }\n    });\n  }\n\n  private _onConnectCallback = new Set<WorkerCallback>();\n\n  onConnect(callback: WorkerCallback) {\n    this._onConnectCallback.add(callback);\n    return () => {\n      this._onConnectCallback.delete(callback);\n    };\n  }\n\n  private _handleConnect(id: string, port: MessagePort) {\n    if (id && !this.ports.has(id)) {\n      this.ports.set(id, port);\n      this.tempPorts.delete(port);\n      this._onConnectCallback.forEach((callback) => {\n        callback(id);\n      });\n    }\n  }\n\n  private _onDisconnectCallback = new Set<WorkerCallback>();\n\n  onDisconnect(callback: WorkerCallback) {\n    this._onDisconnectCallback.add(callback);\n    return () => {\n      this._onDisconnectCallback.delete(callback);\n    };\n  }\n}\n\nexport const SharedWorkerTransport = {\n  Client: SharedWorkerClientTransport,\n  Worker: SharedWorkerInternalTransport,\n};\n"]}