classroom.manager can be null on the server. So it may not come from server. I want to add it and create with my own constructor if it does not come from server. If it comes from server I want to create it with it's own data.
var mappingOption = {
create: function (classroom) {
var res = ko.mapping.fromJS(clasroom.data);
if (res.manager == undefined)
res.manager = ko.observable(new Manager());
return res;
},
'manager': {
create: function (args) {
var res = ko.mapping.fromJS(args.data);
var res2 = new Manager();
$.extend(res2, res)
return res2;
}
}
Class room model
var Classroom = function(data) {
self = this;
data = data || {};
self.manager = data.manager || new Manager();
ko.mapping.fromJS(data, {
'manager': {
function (managerData) {
return new Manager(managerData);
}
}
}, self);
};
Manager model
var Manager = function(data) {
self = this;
data = data || {};
ko.mapping.fromJS(data, {}, self);
};
Key part is the data || new Manager() section
Related
I wrote this small program to fetch data. This however is done async. Since I nonetheless need to use the function holeVertreter(kzl) as a function in another module, I'd like to get a return value which I can eventually pass on.
Excuse my spaghetti code (I usually prettify the code when I am done with my task ...).
Credentials are stored in a file and are therefore not found in this file.
I'd like to end up with "vertreter" as a return value.
Thank you in advance.
const node = require("deasync");
const DSB = require('dsbapi');
const tabletojson = require('tabletojson');
const https = require('https');
const cred = require("./vertrCred");
const dsb = new DSB(cred["dsb"]["user"], cred["dsb"]["passw"]); //Sanitized - no Credentials here
//Stackoverflow 2332811
String.prototype.capitalize = function(lower) {
return (lower ? this.toLowerCase() : this).replace(/(?:^|\s)\S/g, function(a) { return a.toUpperCase(); });
};
function holePlan(kuerzel) {
dsb.fetch()
.then(data => {
const timetables = DSB.findMethodInData('timetable', data);
const tiles = DSB.findMethodInData('tiles', data);
var tilesStr = JSON.stringify(tiles["data"][0]["url"]);
var url = JSON.parse(tilesStr);
https.get(url, (resp) => {
let data = '';
resp.on('data', (chunk) => {
data += chunk;
});
resp.on('end',() => {
var tableasjson = tabletojson.convert(data);
var erstetab = tableasjson[0];
var zweitetab = tableasjson[1];
var drittetab = tableasjson[2];
var viertetab = tableasjson[3];
var fuenftetab = tableasjson[4];
var sechstetab = tableasjson[5];
var siebtetab = tableasjson[6];
var achtetab = tableasjson[7];
if (typeof kuerzel === "undefined")
{
var regenechse = '(Aaa|Aaa[A-Za-z?]|[A-Za-z?]Aaa)';
}
else {
var name = kuerzel.capitalize(true);
var regenechse = '('+name+'|'+name+'[A-Za-z?]|[A-Za-z?]'+name+')';
}
const regex = new RegExp(regenechse,'g');
var sammel = Object.assign(drittetab,fuenftetab);
var z= 0;
var vertreter = {}
var y = JSON.parse(JSON.stringify(sammel));
for (i=0;i<y.length;i++) {
if (typeof y[i].Vertreter =='undefined') {
}
else {
if(y[i].Vertreter.match(regex))
{
z += 1;
vertreter[z] = y[i];
}
}
}
if (z == 0) {
// console.log("Es gibt nichts zu vertreten");
}
else {
//console.log("Es werden "+z+" Stunden vertreten");
return (vertreter);
} ;
});
})
})
.catch(e => {
// An error occurred :(
console.log(e);
});
}
//Stackoverflow
function warte(promise) {
var done = 0;
var result = null;
promise.then(
function (value) {
done = 1;
result = value;
return (value);
},
function (reason) {
done = 1;
throw reason;
}
);
while (!done)
node.runLoopOnce();
return (result);
}
function holeVertretung(kzl) {
var aufgabe = new Promise((resolve,reject) => {
setTimeout(resolve,1000,holePlan(kzl));
});
var ergebnis = warte(aufgabe);
if (typeof ergebnis === "undefined") {
console.log("Mist");
}
else {
console.log(ergebnis);
}
return ergebnis;
}
holeVertretung("Aaa");
That's not the right way to work with promises. If you do such infinite loop, it beats the whole purpose of using promises. Instead, return value from the promise, and use async-await like this:
function warte(promise) {
var done = 0;
var result = null;
return promise.then(
...
}
async function holeVertretung(kzl) {
var aufgabe = new Promise((resolve, reject) => {
setTimeout(resolve, 1000, holePlan(kzl));
});
var ergebnis = await warte(aufgabe);
...
If async-await does not work for some reason, use then clause:
warte(aufgabe).then(value => {
var ergebnis = value;
});
I have a feathersjs service created using the feathers generate service command. I want to override its definition of create method.
This is my service class
/* eslint-disable no-unused-vars */
// Initializes the `userGroup` service on path `/usergroup`
const createService = require('feathers-sequelize');
const createModel = require('../../models/user-group.model');
const hooks = require('./user-group.hooks');
const filters = require('./user-group.filters');
const async = require('async');
module.exports = function () {
const app = this;
const Model = createModel(app);
const paginate = app.get('paginate');
const options = {
name: 'usergroup',
Model,
paginate,
create: fnCreateGroup // documentation says this allows you to create your own create method
};
function fnCreateGroup(data, params) {
let json = {
done: false
};
let permissionIds = Object.keys(data.permissionList), inIds = [];
for (let i in permissionIds) {
if (data.permissionList[permissionIds[i]]) {
inIds.push(parseInt(permissionIds[i]));
}
}
if (inIds.length === 0) {
json.cause = 'You must provide the permission List';
return Promise.resolve(json);
}
async.parallel([
function (cb) {
Model.create({
groupName: data.groupName
}).then(function (ug) {
cb(null, ug);
}, function (err) {
cb(err, null);
});
},
function (cb) {
app.models.permissions.findAll({
where: {
id: {
$in: inIds
}
}
}).then(function (plist) {
cb(null, plist);
});
}
]
, function (err, results) {
if (typeof err !== 'undefined' && err !== null) {
json.err = err;
return Promise.resolve(json);
} else {
let permissions = results[1], group = results[0];
for (let i = 0; i < permissions.length; i++) {
group.addPermission(permissions[i]);
}
json.done = true;
json.id = group.id;
return Promise.resolve(json);
}
});
}
// Initialize our service with any options it requires
app.use('/usergroup', createService(options));
// Get our initialized service so that we can register hooks and filters
let service = app.service('usergroup');
service.hooks(hooks);
if (service.filter) {
service.filter(filters);
}
};
The test on create method shows the result of original method and not mine.
What can I do?
How to override and extend existing services is documented in the database adapter common API. You can use hooks by setting hook.result or extend the existing ES6 class:
const Service = require( 'feathers-sequelize').Service;
class MyService extends Service {
create(data, params) {
data.created_at = new Date();
return super.create(data, params);
}
}
app.use('/todos', new MyService({
paginate: {
default: 2,
max: 4
}
}));
I'm trying to build a multiplayer card game using node.js and socket.io, i need to add players and give them a deck , how can i do that
server.js
var player = require("./players");
var nicknames=[];
io.on("connection", function (socket) {
socket.on('new user', function(data, callback){
if (nicknames.indexOf(data) != -1){
callback(false);
} else{
callback(true);
var aa = {id: nicknames.indexOf(data), name: data};
var ply = player(aa);
socket.user = data;
nicknames.push(socket.user);
updateNicknames();
}
});
function updateNicknames(){
io.sockets.emit('usernames', nicknames);
}
});
players.js
var Player = function(){
this.data ={
id : null,
name : null,
hand : []
};
this.fill = function (info) {
for(var prop in this.data) {
if(this.data[prop] !== 'undefined') {
this.data[prop] = info[prop];
}
}
};
this.getInformation = function () {
return this.data;
};
};
module.exports = function () {
var instance = new Player();
return instance;
};
but the program gives me in empty player object
This would be a good case for a constructor. If you use one, you'll want to avoid exporting an instantiated object. Consider the below players.js
var Player = (function() {
function Player(data) {
this.data = data;
var defaults = {
id: null,
name: null,
hand: []
};
for (var key in defaults) {
var val = defaults[key];
if (this.data[key] == null) {
this.data[key] = val;
}
}
}
Player.prototype.getData = function() {
return this.data;
};
return Player;
})();
module.exports = Player;
Then you can create a new instance of the Player class using the new operator.
var aa = {id: 0, name: 'test'};
var ply = new Player(aa);
console.log(ply.getData());
>> { id: 0, name: 'test', hand: [] }
I have the following string and want to deserialize it to an object(s):
responseEnvelope.timestamp=2015-07-06T15%3A20%3A49.534-07%3A00
&responseEnvelope.ack=Failure&responseEnvelope.correlationId=a58a06c1000d8
&responseEnvelope.build=15743565&error(0).errorId=520003&error(0).domain=PLATFORM
&error(0).subdomain=Application&error(0).severity=Error&error(0).category=Application
(BTW - It is the response from PayPal Adaptive Payments using the Classic API)
https://developer.paypal.com/webapps/developer/docs/classic/api/adaptive-payments/Pay_API_Operation/
Using Node.js I can convert it into an array of items using
var qs = require('querystring');
var response = the-response-from-paypal;
var paypalResponse = qs.parse(response.toString());
console.log(paypalResponse["responseEnvelope.ack"])
//Renders: Failure
but I want to convert it into an object, that can be accessed like:
var ack = deserializedResponse.responseEnvelope.ack;
//etc
Or as JSON:
{
responseEnvelope: {
ack: "Failure",
timestamp: blah,
correlationId: "a58a06c1000d8",
...
},
error: [
{
errorId: 520003,
domain: "Platform",
...
}
]
}
Is there some handy tool to do this?
Basing this off of my answer for your other SO question. You would just need to wrap the recursion function in a preprocess that would build the entire object for you.
var newObj = input.split('&').reduce(function (o, str) {
var pair = str.split('=');
return setObjVal(o, pair[0].split('.'), pair[1]);
}, {});
function setObjVal(obj, paths, val) {
var path;
var arrayInfo;
if (paths.length === 0) {
return val;
}
obj = obj || {};
path = paths.shift();
arrayInfo = path.match(arrayRegExp);
if (arrayInfo) {
path = arrayInfo[1];
if (!Array.isArray(obj[path])) {
obj[path] = [];
}
obj[path][arrayInfo[2]] = setObjVal(obj[path][arrayInfo[2]], paths, val);
}
else {
obj[path] = setObjVal(obj[path], paths, val);
}
return obj;
}
var arrayRegExp = /^(\w+)\((\d+)\)$/;
var input = 'responseEnvelope.timestamp=2015-07-06T15%3A20%3A49.534-07%3A00&responseEnvelope.ack=Failure&responseEnvelope.correlationId=a58a06c1000d8&responseEnvelope.build=15743565&error(0).errorId=520003&error(0).domain=PLATFORM&error(0).subdomain=Application&error(0).severity=Error&error(0).category=Application';
var newObj = input.split('&').reduce(function (o, str) {
var pair = str.split('=');
return setObjVal(o, pair[0].split('.'), pair[1]);
}, {});
function setObjVal(obj, paths, val) {
var path;
var arrayInfo;
if (paths.length === 0) {
return val;
}
obj = obj || {};
path = paths.shift();
arrayInfo = path.match(arrayRegExp);
if (arrayInfo) {
path = arrayInfo[1];
if (!Array.isArray(obj[path])) {
obj[path] = [];
}
obj[path][arrayInfo[2]] = setObjVal(obj[path][arrayInfo[2]], paths, val);
}
else {
obj[path] = setObjVal(obj[path], paths, val);
}
return obj;
}
document.write('<pre>' + JSON.stringify(newObj, null, 4) + '</pre>');
Alternatively if you want to use lodash as in the other answer you could use _.set():
var newObj = input.split('&').reduce(function (o, str) {
var pair = str.split('=');
return _.set(o, pair[0].replace(/\(/g, '[').replace(/\)/g, ']'), pair[1]);
}, {});
var input = 'responseEnvelope.timestamp=2015-07-06T15%3A20%3A49.534-07%3A00&responseEnvelope.ack=Failure&responseEnvelope.correlationId=a58a06c1000d8&responseEnvelope.build=15743565&error(0).errorId=520003&error(0).domain=PLATFORM&error(0).subdomain=Application&error(0).severity=Error&error(0).category=Application';
var newObj = input.split('&').reduce(function (o, str) {
var pair = str.split('=');
return _.set(o, pair[0].replace(/\(/g, '[').replace(/\)/g, ']'), pair[1]);
}, {});
document.write('<pre>' + JSON.stringify(newObj, null, 4) + '</pre>');
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.0/lodash.min.js"></script>
I am trying to include a module i found that will help manage users:
http://www.codeproject.com/Articles/382561/Session-Management-in-Nodejs
Ive copied the code and put it in the same directory as my server.js
I require it by doing:
var express = require('express');
var http = require('http'),
mysql = require("mysql");
var server = http.createServer(app);
var io = require('socket.io').listen(server);
var sessionMgm = require("./sessionManagement");
Now in my socket i do this:
io.sockets.on('connection', function (socket) {
socket.on('setUserInfo', function (data) {
var sess = new Object();
sess.sessionId = socket.id;
sess.userId = data.userId;
sess.username = data.username;
sess.role = data.role;
sessionMgm.add(sess);
});
socket.on("private", function(data) {
if(data.agentName.length <= 0) {
data.agentName = 'Besökare';
}
io.sockets.in('Room_' + data.user_id).emit('updatechat', data.agentName, data.msg);
var user = sessionMgm.getSessionByUserId(data.id);
console.log('::: A socket with ID ' + user + ' connected! ::: ');
});
});
However i keep getting this error:
TypeError: Object # has no method 'getSessionByUserId'
Cant seem to figure out whats wrong, any ideas?
sessionManagement.js:
module.exports = sessionManagement;
var sessions = [];
//User roles list
var userRoles = {
Admin: "administrator",
User: "user",
Supervisor: "supervisor"
};
var sessionManagement = {
indexOf: function(sessionId) {
for(var i in sessions) {
if(sessions[i].sessionId == sessionId)
return i;
}
return null;
},
indexOfUser: function(userId) {
for(var i in sessions) {
if(sessions[i].userId == userId)
return i;
}
return null;
},
add: function(sessionData) {
sessions.push(sessionData);
},
remove: function(sessionId) {
var index = this.indexOf(sessionId);
if(index != null) {
sessions.splice(index, 1);
} else {
return null;
}
},
removeByUserId: function(userId) {
var index = this.indexOf(userId);
if(index != null) {
sessions.splice(index, 1);
} else {
return null;
}
},
getSessionById: function(userId) {
var index = this.indexOfUser(userId);
if(index != null) {
return sessions[index];
} else {
return null;
}
},
getSessionByUserId: function(sessionId) {
var index = this.indexOfUser(userId);
if(index != null) {
return sessions[index];
} else {
return null;
}
},
isAdmin: function(userId) {
var index = this.indexOfUser(userId);
if(index != null) {
if(users[index].role == userRoles.Admin) {
return true;
} else {
return false;
}
} else {
return null;
}
},
getUsersByRole: function(role) {
var usersByRole = [];
for(var i in users) {
if(users[i].role == role)
usersByRole.push(users[i]);
}
return usersByRole;
}
};
As madflow mentioned, you were missing module.exports = sessionManagement in sessionManagement.js
Then you got the error, because you were exporting sessionManagement, before initializing it. Moving the export line to the end of sessionManagement.js should fix that.
module.exports = sessionManagement; // <- you export here
...
...
...
var sessionManagement = { // and initialize here
Although sessionManagement declaration gets hoisted to the top of the module (and that's why you don't get Unexpected identifier or ReferenceError when assigning it to module.exports), it's initialization does not, so what really happens behind the scenes is something like that:
var sessionManagement; // undefined at this point
module.exports = sessionManagement; // <- you export here,
// but sessionManagement is undefined at this point
// and so will be module.exports after this line
...
...
...
sessionManagement = { // and initialize here