TeaSpeak-Client/modules/shared/proxy/Client.ts
2020-12-02 18:08:49 +01:00

119 lines
4.3 KiB
TypeScript

import {ipcRenderer, IpcRendererEvent, remote} from "electron";
import {tr} from "tc-shared/i18n/localize";
import {LogCategory, logError, logWarn} from "tc-shared/log";
import {ProxiedClass, ProxyInterface} from "./Definitions";
export class ObjectProxyClient<ObjectType extends ProxyInterface<ObjectType>> {
private readonly ipcChannel: string;
private readonly handleIPCMessageBinding;
private eventInvokers: {[key: string]: { fireEvent: (type: string, ...args: any) => void }} = {};
constructor(ipcChannel: string) {
this.ipcChannel = ipcChannel;
this.handleIPCMessageBinding = this.handleIPCMessage.bind(this);
}
initialize() {
ipcRenderer.on(this.ipcChannel, this.handleIPCMessageBinding);
}
destroy() {
ipcRenderer.off(this.ipcChannel, this.handleIPCMessageBinding);
/* TODO: Destroy all client instances? */
}
async createNewInstance() : Promise<ObjectType & ProxiedClass<ObjectType>> {
let object = {
objectId: undefined as string
};
const result = await ipcRenderer.invoke(this.ipcChannel, "create");
if(result.status !== "success") {
if(result.status === "error") {
throw result.message || tr("failed to create a new instance");
} else {
throw tr("failed to create a new object instance ({})", result.status);
}
}
object.objectId = result.instanceId;
const ipcChannel = this.ipcChannel;
const events = this.generateEvents(object.objectId);
return new Proxy(object, {
get(target, key: PropertyKey) {
if(key === "ownerWindowId") {
return remote.getCurrentWindow().id;
} else if(key === "instanceId") {
return object.objectId;
} else if(key === "destroy") {
return () => {
ipcRenderer.invoke(ipcChannel, "destroy", target.objectId);
events.destroy();
};
} else if(key === "events") {
return events;
} else if(key === "then" || key === "catch") {
/* typescript for some reason has an issue if then and catch return anything */
return undefined;
}
return (...args: any) => ipcRenderer.invoke(ipcChannel, "invoke", target.objectId, key, ...args);
},
set(): boolean {
throw "class is a ready only interface";
}
}) as any;
}
private generateEvents(objectId: string) : { destroy() } {
const eventInvokers = this.eventInvokers;
const registeredEvents = {};
eventInvokers[objectId] = {
fireEvent(event: string, ...args: any) {
if(typeof registeredEvents[event] === "undefined")
return;
try {
registeredEvents[event](...args);
} catch (error) {
logError(LogCategory.IPC, tr("Failed to invoke event %s on %s: %o"), event, objectId, error);
}
}
};
return new Proxy({ }, {
set(target, key: PropertyKey, value: any): boolean {
registeredEvents[key] = value;
return true;
},
get(target, key: PropertyKey): any {
if(key === "destroy") {
return () => delete eventInvokers[objectId];
} else if(typeof registeredEvents[key] === "function") {
return () => { throw tr("events can only be invoked via IPC") };
} else {
return undefined;
}
}
}) as any;
}
private handleIPCMessage(_event: IpcRendererEvent, ...args: any[]) {
const actionType = args[0];
if(actionType === "notify-event") {
const invoker = this.eventInvokers[args[1]];
if(typeof invoker !== "object") {
logWarn(LogCategory.IPC, tr("Received event %s for unknown object instance on channel %s"), args[2], args[1]);
return;
}
invoker.fireEvent(args[2], ...args.slice(3));
}
}
}