module-installer-loader

Module Loader

Module loader, with a dependency graph

Usage

const TestModule = require('module-loader-test-module');

var modules = {};

// Load three modules
// Module 1 depends on Module 2 and 3 (available as test2, test3)
// argument option is passed to modules

const modulesConfig = {
	test1: {
		loader: (modules) => new TestModule('test1', loadCallback, modules),
		required: {
			test2: 'test2',
			test3: 'test3'
		}
	},
	test2: {
		loader: (modules) => new TestModule('test2', loadCallback, modules),
		required: {
			test3: 'test3'
		}
	},
	test3: {
		loader: (modules) => new TestModule('test3', loadCallback, modules)
	}
};

const loadOrder = ['test3', 'test2', 'test1'];
const loader = new ModuleLoader();
const modulesLoaded = loader.load(modulesConfig);

for(let moduleKey in modulesConfig) {
	if(typeof modulesLoaded[moduleKey] === 'undefined')
		throw new Error('Module not in loaded list');

	if(modulesLoaded[moduleKey].whoami !== moduleKey)
		throw new Error('Module\'s whoami does not match');

	let dependentModules = modulesLoaded[moduleKey].modules;
	for(let dependentModuleKey in modulesLoaded[moduleKey].modules) {
		if(typeof dependentModules[dependentModuleKey] === 'undefined')
			throw new Error('Dependent module not found');
	}
}

if(loadOrder.length)
	throw new Error("Module load callbacks not called");