routes.js

const fs = require('fs');
const _ = require("lodash");
const {
    handleError
} = require('./models/FHIR/httpMessage');
const FHIR = require('fhir').Fhir;
const { pluginsConfig } = require("./plugins/config");

function setFormatWhenQuery(req, res) {
    let format = _.get(req, "query._format");
    if (format && format.includes("xml")) {
        res.set('Content-Type', 'application/fhir+xml');
    } else if (format && format.includes("json")) {
        res.set('Content-Type', 'application/fhir+json');
    }
    delete req['query']['_format'];
}

function doPrettyJson(app, req) {
    let pretty = _.get(req, "query._pretty", false);
    if (pretty === "true") {
        app.set('json spaces', 4);
    } else {
        app.set('json spaces', 0);
    }
}

module.exports = function (app) {

    app.set('json spaces', 4);

    //#region fhir
    let fhirDir = fs.readdirSync("./api/FHIR");
    for (let dir of fhirDir) {
        let isDir = fs.lstatSync(`./api/FHIR/${dir}`).isDirectory();
        if (isDir) {
            app.use(`/${process.env.FHIRSERVER_APIPATH}/${dir}`, (req, res, next) => {
                try {
                    // default JSON format
                    res.set('Content-Type', 'application/fhir+json');

                    if (req.headers["content-type"]) {
                        if (req.headers["content-type"].includes("xml")) {
                            res.set('Content-Type', 'application/fhir+xml');
                            if (req.method == "POST" || req.method == "PUT") {
                                let Fhir = new FHIR();
                                req.body = Fhir.xmlToObj(req.body);
                            }
                        }
                    }
                    _.get(req.headers, "accept") ? "" : (() => {
                        _.get(req.headers, "content-type") ? _.set(req.headers, "accept", _.get(req.headers, "content-type")) : _.set(req.headers, "accept", "application/fhir+json");
                    })();

                    let xmlAcceptList = [
                        "application/xml",
                        "application/fhir+xml",
                        "xml"
                    ];

                    if (xmlAcceptList.includes(req.headers.accept)) {
                        res.set('Content-Type', 'application/fhir+xml');
                    } else {
                        res.set('Content-Type', 'application/fhir+json');
                    }
                    setFormatWhenQuery(req, res);
                    doPrettyJson(app, req);
                    next();
                } catch (e) {
                    return res.send(handleError.exception(e));
                }
            });
        }
    }
    //#endregion

    for(let pluginName in pluginsConfig) {
        let plugin = pluginsConfig[pluginName];
        if (plugin.before && plugin.enable) require(`plugins/${pluginName}`)(app);
    }

    
    app.use('/', require('web/index'));
    

    //#region fhir
    for (let dir of fhirDir) {
        let isDir = fs.lstatSync(`./api/FHIR/${dir}`).isDirectory();
        if (isDir) {
            app.use(`/${process.env.FHIRSERVER_APIPATH}/${dir}`, require(`./api/FHIR/${dir}`));
        }
    }
    //#endregion
    app.route('/:url(api|auth|web)/*').get((req, res) => {
        res.status(404).json({
            status: 404,
            message: "not found"
        });
    });

    for (let pluginName in pluginsConfig) {
        let plugin = pluginsConfig[pluginName];
        if(!plugin.before && plugin.enable) require(`plugins/${pluginName}`)(app);
    }
};