Function App

js/app.js:67–346

* The core app. * @class

()

 * @class
 */
function App () {
	let nodeHelpers = [];
	let httpServer;
	let defaultModules;
	let env;

	/**
	 * Loads a specific module.
	 * @param {string} module The name of the module (including subpath).
	 */
	function loadModule (module) {
		const elements = module.split("/");
		const moduleName = elements[elements.length - 1];
		let moduleFolder = path.resolve(`${global.root_path}/${env.modulesDir}`, module);

		if (defaultModules.includes(moduleName)) {
			const defaultModuleFolder = path.resolve(`${global.root_path}/${global.defaultModulesDir}/`, module);
			if (!global.mmTestMode) {
				moduleFolder = defaultModuleFolder;
			} else {
				// running in test mode, allow defaultModules placed under moduleDir for testing
				if (env.modulesDir === "modules" || env.modulesDir === "tests/mocks") {
					moduleFolder = defaultModuleFolder;
				}
			}
		}

		const moduleFile = `${moduleFolder}/${moduleName}.js`;

		try {
			fs.accessSync(moduleFile, fs.constants.R_OK);
		} catch {
			Log.warn(`No ${moduleFile} found for module: ${moduleName}.`);
		}

		const helperPath = `${moduleFolder}/node_helper.js`;

		let loadHelper = true;
		try {
			fs.accessSync(helperPath, fs.constants.R_OK);
		} catch {
			loadHelper = false;
			Log.log(`No helper found for module: ${moduleName}.`);
		}

		// if the helper was found
		if (loadHelper) {
			let Module;
			try {
				Module = require(helperPath);
			} catch (e) {
				Log.error(`Error when loading ${moduleName}:`, e.message);
				return;
			}
			let m = new Module();

			if (m.requiresVersion) {
				Log.log(`Check MagicMirror² version for node helper '${moduleName}' - Minimum version: ${m.requiresVersion} - Current version: ${global.version}`);