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app.js
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app.js
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"use strict";
const _ = require('lodash');
const path = require('path');
const typeIs = require('type-is');
const mimetypes = require('mime-types');
const bootstrap = require('./bootstrap');
const EventEmitter = require('events').EventEmitter;
const util = require('util');
const multer = require('multer');
function App() {
EventEmitter.call(this);
}
util.inherits(App, EventEmitter);
_.assign(App.prototype, {
/*
* We need passport for all the application authantication
**/
passport: require('passport'),
/*
* Public: stores application configuration
*
* @param - (Object) config - object containing configuration keys and values
*
* @returns - (Object) - returns widget-cms application object
**/
config: function (config) {
// store configuration
if (this._config) {
throw new Error('Application configuration already set');
}
this._config = config;
this._middleware = [];
this._helpers = [];
return this;
},
/*
* Public: registers express server middleware. registered at the bottom of the middleware stack
*
* @param - (Function) middleware - express server middleware function that accepts 3 params
*
* @returns - (Object) - returns widget-cms application object
**/
registerMiddleware: function (middleware) {
this._middleware.push(middleware);
return this;
},
/*
* Public: initializes the application and starts the server
*
* @param - (Function) done - optional callback function
*
* @returns - widget-cms application object
**/
start: function (done) {
if (!this._config) {
throw new Error('Application configuration not set');
}
// initialize Bookshelf
let Bookshelf = bootstrap.initBookshelf(this._config.db);
// initialize base model
Bookshelf = require('./core/model')(Bookshelf);
// initialize base collection
Bookshelf = require('./core/collection')(Bookshelf);
this.Bookshelf = Bookshelf;
this.Model = Bookshelf.Model;
this.Collection = Bookshelf.Collection;
bootstrap.loadModels(this._config);
bootstrap.loadCollections(this._config);
this.Controller = require('./core/controller')(this);
this.server = bootstrap.initServer(this);
this._plugins = bootstrap.loadPlugins(this._config);
bootstrap.loadControllers(this._config);
if (!this._config.hasOwnProperty('serverless') || !this._config.serverless) {
bootstrap.loadRoutes(this._config);
// file uploads
let storage = multer.diskStorage({
destination: (req, file, cb) => {
cb(null, this._config.uploadsDir || path.join(this._config.rootDir, 'public', 'uploads'));
},
filename: function (req, file, cb) {
let filename = `image_${Date.now()}.${mimetypes.extension(file.mimetype)}`;
cb(null, filename );
}
});
this.uploader = multer({storage: storage}).any();
// start server
this.server.listen(this.server.get('port'), this.server.get('ipAddress'), () => {
console.info("✔ Express server listening on port %d in %s mode", this.server.get('port'), this.server.get('env'));
if(done) {
done();
}
});
}
return this;
},
/*
* Public: add a collection to application
*
* @param - (Function) middleware - express server middleware function that accepts 3 params
*
* @returns - (Object) - returns created Bookshelf collection object
**/
addCollection: function () {
return this.Bookshelf.collection.apply(this.Bookshelf, _.toArray(arguments));
},
/*
* Public: adds a model to application
*
* @returns - (Object) - returns created Bookshelf model object
**/
addModel: function () {
return this.Bookshelf.model.apply(this.Bookshelf, _.toArray(arguments));
},
/*
* Public: get a registered plugin object
*
* @param - (String) name - plugin name
*
* @returns - (Object) - plugin object or null if not found
**/
getPlugin: function (name) {
if (this._plugins[name]) {
let plugin = this._plugins[name];
return plugin;
}
else {
return null;
}
},
/*
* Public: adds a controller to application
*
* @param - (String) name - controller name
* @param - (Object) val - controller object
*
* @returns - (Object) - returns the created controller object
**/
addController: function (name, val) {
this._controllers = this._controllers || Object.create(null);
if (this._controllers[name]) {
throw new Error(name + ' is already defined in the registry');
}
this._controllers[name] = val;
return val;
},
/*
* Public: gets a created controller
*
* @param - (String) name - controller name
* @param - (Object) val - controller object
*
* @returns - (Object) - returns stored controller object
**/
getController: function (name) {
this._controllers = this._controllers || Object.create(null);
if (this._controllers[name]) {
return new this._controllers[name]();
}
else {
return null;
}
},
/*
* Public: checks is a controller method exists
*
* @param - (String) name - controller name
* @param - (String) method - controller method
*
* @returns - (Boolean) - returns a boolean
**/
hasController: function (name, method) {
return !!this._controllers[name] && _.isFunction(this._controllers[name].prototype[method]);
},
/*
* Public: gets a all stored controllers and their methods
*
* @returns - (Array)
**/
getControllers: function () {
return _.keys(this._controllers).map((val) => {
return {
name: val,
methods: _.keys(this._controllers[val].prototype)
};
});
},
/*
* Public: clears application cache
*
* @param - (String) name - cached route name
* @param - (Function) callback - callback function
*
* @returns - (Void)
clearCache: function (name, callback) {
let cache = this.server.get('cache');
if (callback && _.isFunction(callback)) {
cache.del(name || '*', callback);
}
return this
},**/
/*
* Public: gets a created model
*
* @param - (String) name - model name
*
* @returns - (Object) - returns requested Model
**/
getModel: function (name) {
if (!this.Bookshelf._models[name]) {
throw new Error(`Model<${name}> not found`);
}
return this.Bookshelf._models[name];
},
/*
* Public: gets a created collection
*
* @param - (String) name - collection name
*
* @returns - (Object) - returns requested collection
**/
getCollection: function (name) {
if (!this.Bookshelf._collections[name]) {
throw new Error(`Collection<${name}> not found`);
}
return this.Bookshelf._collections[name];
},
/*
* Public: creates application get routes. It is syntactic suger on top express get method.
*
* @returns - (Void)
**/
get: function () {
let args = _.toArray(arguments);
/* disable cache
if (this._config.cache) {
let cache = this.server.get('cache');
if (args.length === 2) {
args.splice(1, 0, cache.route());
}
if (args.length === 3) {
let secondArg = [];
if (_.isFunction(args[1])) {
secondArg.push(args[1]);
secondArg.push(cache.route());
}
else if (_.isArray(args[1])) {
secondArg = args[1];
secondArg.push(cache.route());
}
args.splice(1, 1, secondArg);
}
}*/
this.server.get.apply(this.server, args);
},
/*
* Public: creates application post routes. It is suger on top express post method.
*
* @returns - (Void)
**/
post: function () {
let args = _.toArray(arguments);
// this middleware ensures that forms with
// enctype multipart are handled correctly
let middleware = (req, res, next) => {
if (typeIs(req, ['multipart/*'])) {
this.uploader(req, req, function (err) {
if (err) {
return next(err);
}
next();
});
}
else {
next();
}
};
if (args.length === 2) {
args.splice(1, 0, middleware);
}
if (args.length === 3) {
let secondArg = [];
if (_.isFunction(args[1])) {
secondArg.push(args[1]);
secondArg.push(middleware);
}
else if (_.isArray(args[1])) {
secondArg = args[1];
secondArg.push(middleware);
}
args.splice(1, 1, secondArg);
}
this.server.post.apply(this.server, args);
},
/*
* Public: gets application configuration
*
* @param - (String) name - controller name
* @returns - (Object) - returns application configuration
**/
getConfig: function (name) {
return this._config[name];
},
/*
* Public: updates application configuration
*
* @returns - (Object) - returns updated configuration
**/
updateConfig: function (name, val) {
if (this._config[name]) {
this._config[name] = val;
}
},
/*
* Public: registers handlebars helpers
*
* @params - (Function) fn - helper function that accepts 1 argument, a handlebars object
*
* @returns - (Object) - returns widget-cms object
**/
registerHelper: function (fn) {
if (!_.isFunction(fn)) {
throw new Error('Invalid arguments');
}
this._helpers.push(fn);
return this;
}
});
module.exports = new App;