ahmadnassri/mockbin

const debug = require("debug")("mockbin");
const util = require("node:util");
const uuid = require("uuid");
const validate = require("har-validator");

module.exports = (client) => (req, res, next) => {
    let mock = req.jsonBody;

    // check for full HAR
    if (req.jsonBody?.response) {
        mock = req.jsonBody.response;
    }

    // exception for the web Form
    // TODO eliminate this and rely on req.simple.postData.text
    if (req.simple.postData.params?.response) {
        try {
            mock = JSON.parse(req.simple.postData.params.response);
        } catch (e) {
            debug(e);
        }
    }

    // overritten by application/x-www-form-urlencoded or multipart/form-data
    if (req.simple.postData.text) {
        try {
            mock = JSON.parse(req.simple.postData.text);
        } catch (e) {
            debug(e);
        }
    }

    // provide optional values before validation
    mock.redirectURL = "";
    mock.bodySize = 0;
    mock.headersSize = 0;

    if (!mock.content) {
        mock.content = {};
    }

    mock.content.size = 0;

    validate
        .response(mock)
        .then(function () {
            const id = uuid.v4();

            client.set(
                `bin:${id}`,
                JSON.stringify(mock),
                "EX",
                process.env.MOCKBIN_REDIS_EXPIRE_SECONDS,
            );

            res.view = "redirect";
            res.status(201).location(util.format("/bin/%s", id)).body = id;
        })

        .catch((err) => {
            res.body = {
                error: "Failed to set response",
                message: err.message,
            };
        })

        .then(next);
};