How to properly manage "business" constants with AngularJS?

Question

I'm working with AngularJS on a browser game and I have a bunch of "business" constants.

These constants will be often updated during game testing (game balancing) and are used by different modules/features.

I'm currently managing them in a single file like that:

constants.js

var gameConstants = {
 BASE_COST: 100,
 MULTIPLIER_COST: 1.07
};

myFactory.js

app.factory('MyFactory', function () {
 return {
 getRealCost: function() {
 return gameConstants.BASE_COST * gameConstants.MULTIPLIER_COST;
 }
 }
});

But I'm thinking about a service provider for game constants. Something like:

constantServices.js

app.factory('ConstantServices', function () {
 var baseCost: 100, //Should I use UPPER_SNAKECASE here too?
 multiplierCost: 1.07
 return {
 getCost: function() {
 return baseCost;
 }
 getMultiplierCost: function() {
 return multiplierCost;
 }
 }
});

myFactory.js

app.factory('MyFactory', ['ConstantServices' function (ConstantServices) {
 return {
 getRealCost: function() {
 return ConstantServices.getCost() * ConstantServices.getMultiplierCost();
 }
 }
});

What do you think about it? Is it a good idea to create a service provider for constants only (i. e. call a service without any logic)? Do you think about a better way to manage these constants?

• Dan Pichelman: If your game balance constants are stored in client side JavaScript, you should be prepared for people to discover and alter those values.
• Allan Quatermain: @DanPichelman You're right, it's intended. The game has to be full client-side.
• Neil Hibbert: edit: re-worded; I see no reason why you shouldn't encapsule the gameConstants object inside the 'ConstantServices' factory and just expose it's values via the public interface of the service...

Answer 1

Just use the constant service from AngularJS:

app.constant('gameConstants, [ 
 { BASE_COST: 100 },
 { MULTIPLIER_COST: 1.07 }
]);

And then inject the gameConstants wherever you need them:

app.factory('MyFactory', ['gameConstants', function (gameConstants) {
 return {
 getRealCost: function() {
 return gameConstants.BASE_COST * gameConstants.MULTIPLIER_COST;
 }
 }
}]);