Simplified implementation of exposeMainApi()

simplified-exposeMainApi.ts

// This associates the name of each API with a list of the API's methods.
const exposedApis: Record<string, string[]> = {};

function exposeMainApi<T extends ElectronMainApi<T>>(mainApi: T): void {
  const apiClassName = mainApi.constructor.name;
  const methodNames: string[] = [];
  
  // For each property of mainApi...
  for (const methodName of getPropertyNames(mainApi)) {
    
    // If the property is neither the constructor nor private-prefixed...
    if (methodName != "constructor" && "_#".indexOf(methodName[0]) < 0) {
      const method = (mainApi as any)[methodName];
      
      // And if the property is a method of the API...
      if (typeof method == "function") {
        
        // Place the method on an IPC channel whose name includes both the
        // API's class name and the name of the method.
        const ipcName = `${apiClassName}:${methodName as string}`;
        registerIpcHandler(ipcName, (args: any[]) => {
          
          // Call the method so that it's 'this' is the mainApi object.
          return method.bind(mainApi)(...args);
        });
        
        // Keep track of all the method names in this particular API.
        methodNames.push(methodName);
      }
    }
  }
  // Ensure we can look up an API's methods by the API's class name.
  exposedApis[apiClassName] = methodNames;
}