lib/src/http/response/ViewResponseFactory.ts

import {Container} from "../../di";
import {ResponseFactory} from "./ResponseFactory";
import {Request} from "../lifecycle/Request";
import {ViewEngine} from "../../views/ViewEngine";

/**
 * Helper function that creates a new ViewResponseFactory to render the given view
 * with the specified data.
 * @param name
 * @param data
 */
export function view(name: string, data?: {[key: string]: any}): ViewResponseFactory {
    return new ViewResponseFactory(name, data)
}

/**
 * HTTP response factory that uses the ViewEngine service to render a view
 * and send it as HTML.
 */
export class ViewResponseFactory extends ResponseFactory {
    constructor(
        /** The name of the view to render. */
        public readonly viewName: string,
        /** Optional data that should be passed to the view engine as params. */
        public readonly data?: {[key: string]: any}
    ) { super() }

    public async write(request: Request) {
        const viewEngine = <ViewEngine> Container.getContainer().make(ViewEngine)
        request.response.body = await viewEngine.renderByName(this.viewName, this.data || {})
        request.response.setHeader('Content-Type', 'text/html; charset=utf-8')
        return request
    }
}