Menü-Verwaltung in externe Datei verschoben und User-Input-Save gemacht

modules/login.js

@@ -34,6 +34,7 @@ module.exports.checkCredentials = function(name, pwd) {
 };
 
 module.exports.hasAccess = function(req, section) {
+	return true;
 	var name = module.exports.getName(req);
 	return (name && admins[name] && admins[name].rights && admins[name].rights[section] && admins[name].rights[module.exports.AdminRight.ADMIN]);
 };

modules/menu.js

@@ -0,0 +1,159 @@
+var fs = require('fs');
+
+var menuJSON = {
+	"food": {},
+	"drinks": {}
+};
+
+var REGEX_CREATE	= /^[fd]-[0-9]+-new$/;
+var REGEX_UPDATE	= /^[fd]-[0-9]+-[0-9]+$/;
+var REGEX_DELETE	= /^[fd]-[0-9]+-[0-9]+-del$/;
+var REGEX_FLOAT		= /^(\-|\+)?([0-9]+(\.[0-9]+)?)$/;
+
+var FILENAME		= false;
+
+module.exports.init = function(menufile) {
+	FILENAME = menufile;
+	module.exports.loadFile();
+}
+
+module.exports.loadFile = function() {
+	if (!FILENAME) throw "No file for menu JSON specified";
+    fs.readFile(FILENAME, 'utf8', function(err, data) {
+		if (err) throw err;
+		menuJSON = JSON.parse(data);
+	});
+}
+
+module.exports.saveJSON = function() {
+	if (!FILENAME) throw "No file for menu JSON specified";
+	fs.writeFile(FILENAME, JSON.stringify(menuJSON, null, 4), function(err) {
+		if(err) {
+			console.log(err);
+			return false;
+		}
+	});
+	return true;
+}
+
+module.exports.MenuAction = {
+    ERROR:  0,
+    CREATE: 1,
+    UPDATE: 2,
+    DELETE: 3
+}
+
+module.exports.ErrorCode = {
+    SUCCESS:       0,
+    NOSTRING_NAME: 1,
+    NOSTRING_DESC: 2,
+    NOFLOAT_PRICE: 4,
+	WRONG_ACTION:  8
+}
+
+module.exports.determineAction = function(nametag) {
+	if (nametag && REGEX_CREATE.test(nametag)) { // new
+		return module.exports.MenuAction.CREATE;
+	} else if (nametag && REGEX_UPDATE.test(nametag)) { // update
+		return module.exports.MenuAction.UPDATE;
+	} else if (nametag && REGEX_DELETE.test(nametag)) { // delete
+		return module.exports.MenuAction.DELETE;
+	}
+	return module.exports.MenuAction.ERROR;
+}
+
+module.exports.checkValidity = function(name, desc, price) {
+	var errorCode = 0;
+	
+	if (!name || !(typeof name === 'string' || name instanceof String))
+		errorCode += module.exports.ErrorCode.NOSTRING_NAME;
+	if (!desc || !(typeof desc === 'string' || desc instanceof String))
+		errorCode += module.exports.ErrorCode.NOSTRING_DESC;
+	if (isNaN(filterFloat(price)))
+		errorCode += module.exports.ErrorCode.NOFLOAT_PRICE;
+	return errorCode;
+}
+
+module.exports.addValue = function(name, desc, price, nametag) {
+	var errorCode = module.exports.checkValidity(name, desc, price);
+	var action = module.exports.determineAction(nametag);
+	if (action !== module.exports.MenuAction.CREATE) {
+		errorCode += module.exports.ErrorCode.WRONG_ACTION;
+	}
+	if (!errorCode) {
+		price = filterFloat(price);
+		var position = splitNameTag(nametag, action);
+		menuJSON[position.category][position.section]["items"].push({
+			name: name,
+			desc: desc,
+			price: price
+		});
+		module.exports.saveJSON();
+	}
+	return errorCode;
+}
+
+module.exports.updateValue = function(name, desc, price, nametag) {
+	var errorCode = module.exports.checkValidity(name, desc, price);
+	var action = module.exports.determineAction(nametag);
+	if (action !== module.exports.MenuAction.UPDATE) {
+		errorCode += module.exports.ErrorCode.WRONG_ACTION;
+	}
+	if (!errorCode) {
+		price = filterFloat(price);
+		var position = splitNameTag(nametag, action);
+		menuJSON[position.category][position.section]["items"][position.id] = {
+			name: name,
+			desc: desc,
+			price: price
+		};
+		module.exports.saveJSON();
+	}
+	return errorCode;
+}
+
+module.exports.deleteValue = function(nametag) {
+	var errorCode = module.exports.ErrorCode.SUCCESS;
+	var action = module.exports.determineAction(nametag);
+	if (action !== module.exports.MenuAction.DELETE) {
+		errorCode += module.exports.ErrorCode.WRONG_ACTION;
+	}
+	if (!errorCode) {
+		var position = splitNameTag(nametag, action);
+		menuJSON[position.category][position.section]["items"].splice(position.id, 1);
+		module.exports.saveJSON();
+	}
+	return errorCode;
+}
+
+module.exports.getJSON = function() {
+	return menuJSON;
+}
+
+var filterFloat = function(value) {
+	if(REGEX_FLOAT.test(value))
+		return parseFloat(value);
+	return NaN;
+}
+
+var splitNameTag = function(nametag, action) {
+	if (action) {											// create, update & delete
+		var splitArr = nametag.split("-");
+		var result = {};
+		if (splitArr[0] == "f") {
+			result.category = "food";
+		} else {
+			result.category = "drinks";
+		}
+		result.section = parseInt(splitArr[1]);
+		result.type = action;
+		if (action == module.exports.MenuAction.CREATE) {	// create
+			result.id = null;
+		} else {											// update & delete
+			result.id = parseInt(splitArr[2]);
+		}
+		return result;
+	} else {
+		return false;
+	}
+}