@gabliam/express/src/express-interceptor.js

Gabliam plugin for add express

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.UseExpressInterceptors = exports.toInterceptor = exports.isValidInterceptor = void 0;
const core_1 = require("@gabliam/core");
const web_core_1 = require("@gabliam/web-core");
/**
 * Test if target is an express interceptor
 * @param target any
 */
const isValidInterceptor = (target) => {
    const meta = Reflect.getOwnMetadata(web_core_1.METADATA_KEY.specialInterceptor, target.constructor || target);
    return meta === undefined || meta === 'express';
};
exports.isValidInterceptor = isValidInterceptor;
/**
 * ExpressInterceptor decorator
 * class is an express interceptor.
 * Must return express middleware
 */
const ExpressInterceptor = () => (target) => {
    Reflect.defineMetadata(web_core_1.METADATA_KEY.specialInterceptor, 'express', target);
};
/**
 * Convert a Express middleware to an express interceptor
 */
const toInterceptor = (mid) => {
    const clazz = class {
        async intercept(context, next) {
            const req = context.request.originalRequest;
            const res = context.response.originalResponse;
            switch (mid.length) {
                // with callback
                case 3:
                    return new Promise((resolve, reject) => {
                        mid(req, res, (err) => {
                            if (err) {
                                reject(err);
                            }
                            else {
                                resolve(next());
                            }
                        });
                    });
                // with error
                case 2:
                default:
                    mid(req, res);
                    await next();
                    return Promise.resolve();
            }
        }
    };
    (0, web_core_1.Context)()(clazz.prototype, 'intercept', 0);
    (0, web_core_1.Next)()(clazz.prototype, 'intercept', 1);
    (0, core_1.Service)()(clazz);
    ExpressInterceptor()(clazz);
    // metadata
    Reflect.defineMetadata('design:type', Function, clazz.prototype, 'intercept');
    Reflect.defineMetadata('design:paramtypes', [Function, Function], clazz.prototype, 'intercept');
    Reflect.defineMetadata('design:returntype', Promise, clazz.prototype, 'intercept');
    return clazz;
};
exports.toInterceptor = toInterceptor;
/**
 * Alias for evict to use: UseInterceptors(toInterceptor(expressMid))
 * /!\ Use it for RequestHandler
 */
const UseExpressInterceptors = (...mids) => (0, web_core_1.UseInterceptors)(...mids.map((m) => (0, exports.toInterceptor)(m)));
exports.UseExpressInterceptors = UseExpressInterceptors;