import { ServiceManager } from "../services/index.js";
import { ToolHandlerResponse } from "./types.js";
/**
* Type for validation function to validate arguments
*/
export type ValidationFn<T> = (args: T) => void;
/**
* Type for service method function to call appropriate service
*/
export type ServiceMethodFn<T, R> = (
serviceManager: ServiceManager,
args: T
) => Promise<{ data: R | null; error: Error | null }>;
/**
* Factory function to create standardized handlers
* @param validateFn - Function to validate arguments
* @param serviceMethodFn - Function that calls the appropriate service method
* @returns A handler function
*/
export function createHandler<T, R>(
validateFn: ValidationFn<T>,
serviceMethodFn: ServiceMethodFn<T, R>
): (serviceManager: ServiceManager, args: unknown) => Promise<ToolHandlerResponse> {
return async (
serviceManager: ServiceManager,
args: unknown
): Promise<ToolHandlerResponse> => {
const typedArgs = args as T;
// Validate arguments
validateFn(typedArgs);
// Call service method
const response = await serviceMethodFn(serviceManager, typedArgs);
// Handle error
if (response.error) {
throw response.error;
}
// Return formatted response
return {
success: true,
data: response.data
};
};
}
