kequapp/dist/router/actions.js

A minimal, zero-magic Node web framework built on native APIs

import { unknownToEx } from "../built-in/tools/ex.js";
import { findErrorHandler, findRenderer } from "./find.js";
export async function renderRoute(route, bundle) {
    const { res, methods } = bundle;
    const { actions, method, renderers } = route;
    let payload;
    if (methods.includes('OPTIONS')) {
        res.setHeader('Access-Control-Allow-Origin', '*');
    }
    if (method === 'OPTIONS') {
        res.statusCode = 204;
        addOptionsHeaders(bundle);
    }
    else {
        res.statusCode = 200;
        res.setHeader('Content-Type', 'text/plain');
    }
    for (const action of actions) {
        payload = await action(bundle);
        if (res.writableEnded || payload !== undefined) {
            break;
        }
    }
    await finalize(renderers, bundle, payload);
}
export async function renderError(route, bundle, error) {
    const { errorHandlers, renderers } = route;
    const { res, logger } = bundle;
    const errorHandler = findErrorHandler(errorHandlers, getContentType(bundle));
    const ex = unknownToEx(error);
    res.statusCode = ex.statusCode;
    const payload = await errorHandler(ex, bundle);
    await finalize(renderers, bundle, payload);
    if (res.statusCode === 500) {
        logger.error(error);
    }
}
function getContentType({ res }) {
    return String(res.getHeader('Content-Type') ?? 'text/plain');
}
function addOptionsHeaders({ req, res, methods }) {
    const allowMethods = methods.join(', ');
    const allowHeaders = req.headers['access-control-request-headers'];
    if (allowMethods) {
        res.setHeader('Valid', allowMethods);
        res.setHeader('Access-Control-Allow-Methods', allowMethods);
    }
    if (allowHeaders) {
        res.setHeader('Access-Control-Allow-Headers', allowHeaders);
    }
    res.setHeader('Content-Length', 0);
}
async function finalize(renderers, bundle, payload) {
    const { res } = bundle;
    if (!res.writableEnded && payload !== undefined) {
        const renderer = findRenderer(renderers, getContentType(bundle));
        await renderer(payload, bundle);
    }
}