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es6.js
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es6.js
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/**
* Native components
*/
import path from 'path';
/**
* Module Dependencies
*/
import bodyParser from 'body-parser';
import compress from 'compression';
import cookieParser from 'cookie-parser';
import debugLib from 'debug';
import express, { Router as expRouter } from 'express';
import expressSession from 'express-session';
import featureClient from 'feature-client';
import glob from 'glob';
import methodOverride from 'method-override';
import morgan from 'morgan';
import Promise from 'bluebird';
import xprExpress from 'xpr-express';
import xprToggle from 'xpr-toggle';
/**
* Local Dependencies
*/
/**
* Local Constants
*/
const app = express();
const debug = debugLib('jack-stack');
const routerMatch = expRouter();
/**
* This config object will be overridable during the `config` event
*/
var config = {
cookie: {
secret: 'You put the lime in the coconut',
},
session: {
name: 'sessionID',
secret: 'What would the fox say if he knew...?',
getStore: () => {
console.warn('\n\n\nExpress MemoryStore should not be used in production...\n\n\n');
}
},
experiments: [ 'placeholderExperiment' ],
bodyParser: {
urlencoded: {
extended: false,
}
},
morgan: 'dev',
dirnames: {
'static': [ path.join(process.cwd(), 'public') ],
routes: [ path.join(process.cwd(), 'routes') ],
},
port: 5000,
assign: (newConfig) => {
Object.assign(config, newConfig);
},
};
/**
* Used to validate if experiments are enabled or not
*/
var delays = [];
/**
* Used to validate if experiments are enabled or not
*/
var experimented = false;
/**
* Used to make sure the express app is initialized before starting
*/
var initialized = false;
/**
* Used for event short-names
*/
var registeredEvents = [];
/**
* Used to log the initialization order of middleware, etc
*/
var initOrder = 1;
function wrap(name, fn) {
registeredEvents.push(name);
let eventData = {
app,
config,
registerDelay,
};
app.emit(`before.${name}`, eventData);
app.emit(`before.init.${name}`, registerDelay);
console.log(`${initOrder++}: ${name}`);
if (fn) fn();
app.emit(`after.init.${name}`, registerDelay);
app.emit(`after.${name}`, eventData);
function registerDelay(promise) {
if (typeof promise.next !== 'function') return;
delays.push(promise);
}
}
function init() {
initialized = true;
app.emit('config', config);
wrap('config');
// Req.cookie
wrap('cookie', () => {
debug('cookie');
app.use(cookieParser(config.cookie.secret));
});
// Req.user
wrap('session', () => {
debug('session');
let store = config.session.getStore(expressSession);
config.session.store = store;
let sessionConfig = {
key: config.session.name,
secret: config.session.secret,
resave: false,
saveUninitialized: false
};
if (store) sessionConfig.store = store;
app.use(expressSession(sessionConfig));
});
// Load static assets
wrap('static', () => {
debug('static');
var dirs = config.dirnames.static;
if (!Array.isArray(dirs)) dirs = [ dirs ];
dirs.map((dir) => {
app.use(express.static(dir));
});
});
// Log everything after this
wrap('logging', () => {
debug('logging');
app.use(morgan(config.morgan));
});
// Req.feature
wrap('xprmntl', () => {
debug('xprmntl');
let xprConfig = config.experiments;
experimented = !!xprConfig;
if (!experimented) return;
if (Array.isArray(xprConfig)) xprConfig = { experiments: xprConfig };
featureClient.use(xprExpress());
featureClient.use(xprToggle());
featureClient.configure(xprConfig);
app.use(featureClient.express);
app.use(featureClient.toggle);
if (xprConfig.cron) featureClient.cron(xprConfig.cron);
delays.push(featureClient.announce()
.catch(() => {
// If there's no XPRMNTL Dashboard response,
// I want to start the app anyway, just with the fallbacks
return Promise.resolve();
}));
});
// Parse application/json
wrap('json', () => {
debug('json');
app.use(bodyParser.json(config.bodyParser.json));
});
// Parse application/x-www-form-urlencoded
wrap('urlencoded', () => {
debug('urlencoded');
app.use(bodyParser.urlencoded(config.bodyParser.urlencoded));
});
// Fake PUT and DELETE when clients don't support
wrap('override', () => {
debug('override');
app.use(methodOverride(config.methodOverride));
});
// GZip all of our responses
wrap('compress', () => {
debug('compress');
app.use(compress(config.compression));
});
// Any routing level stuff
wrap('routing', () => {
debug('routing');
let dirs = config.dirnames.routes;
if (!Array.isArray(dirs)) dirs = [ dirs ];
// Dir order matters
dirs.forEach((dir) => {
var dirFiles = {};
glob.sync(path.join(dir, '**', '*.js'))
.forEach((filename) => {
let route = filename
.replace(dir, '') // Get just the file
.replace(/\.js$/, '') // Basename
.replace(/index$/, ''); // And use index as './'
dirFiles[ route ] = filename;
});
// Sort by the path, since '/' needs to come first
Object.keys(dirFiles).sort().forEach((route) => {
let filename = dirFiles[ route ];
debug(route, filename);
let file = require(filename);
if (file instanceof routerMatch.constructor) return app.use(route, file);
let instance = require(file);
if (typeof instance === 'function' && instance.length === 2) return instance(app);
console.error(`\n\n\nFile incompatible and not loaded: ${file}\n\n\n`);
});
});
debug('routing done');
});
}
export function start(cb) {
if (!initialized) init();
return Promise.all(delays)
.then(appListen.bind(app, config.port))
.then(() => {
if (cb) cb();
})
.catch((err) => {
console.error(err);
if (cb) cb(err);
throw err;
});
function appListen(port) {
return new Promise((resolve) => {
if (config.sockets && config.sockets.server) {
return config.sockets.server.listen(port, () => resolve());
}
app.listen(port, () => resolve());
});
}
}
var useBefore = app.useBefore = useAround('before.');
var useAfter = app.useAfter = useAround('after.');
function useAround(prefix) {
return function(method, name, handler) {
var eventName = prefix + method;
if (typeof name === 'function') throw new Error(`No name provided: useAround('${eventName}')`);
app.on(`${eventName}`, function(data) {
wrap(name, function() {
handler(data);
});
});
};
}
export function use(modules) {
if (!Array.isArray(modules)) modules = [ modules ];
modules.map((module) => {
app.on(module.event, module.handler);
});
}
export default { app, start, init, wrap, use, useAfter, useBefore, Router: expRouter };
export { init, start, wrap, app, use, useAfter, useBefore, expRouter as Router };