import {HTTPKernelModule} from "../HTTPKernelModule";
import {ResponseObject} from "../../routing/Route";
import {Request} from "../../lifecycle/Request";
import {plaintext} from "../../response/StringResponseFactory";
import {ResponseFactory} from "../../response/ResponseFactory";
import {json} from "../../response/JSONResponseFactory";

/**
 * Base class for HTTP kernel modules that apply some response from a route handler to the request.
 */
export abstract class AbstractResolvedRouteHandlerHTTPModule extends HTTPKernelModule {
    /**
     * Given a response object, write the response to the request in the appropriate format.
     * @param object
     * @param request
     * @protected
     */
    protected async applyResponseObject(object: ResponseObject, request: Request) {
        if ( (typeof object === 'string') || (typeof object === 'number') ) {
            object = plaintext(String(object))
        }

        if ( object instanceof ResponseFactory ) {
            await object.write(request)
        } else if ( typeof object !== 'undefined' ) {
            await json(object).write(request)
        } else {
            await plaintext('').write(request)
        }
    }
}