Typically for a use case which involves a sequence of pages and in the final stage or page we post the data to the server. In this scenario we need to maintain the state. In the below snippet we maintain the state on the client side
As mentioned in the above post. The session is created using the factory recipe.
Client side session can be maintained using the value provider recipe as well.
Please refer to my post for the complete details. session-tracking-in-angularjs
Let's take an example of a shopping cart which we need to maintain across various pages / angularjs controller.
In typical shopping cart we buy products on various product / category pages and keep updating the cart. Here are the steps.
Here we create the custom injectable service having a cart inside using the "value provider recipe".
'use strict';
function Cart() {
return {
'cartId': '',
'cartItem': []
};
}
// custom service maintains the cart along with its behavior to clear itself , create new , delete Item or update cart
app.value('sessionService', {
cart: new Cart(),
clear: function () {
this.cart = new Cart();
// mechanism to create the cart id
this.cart.cartId = 1;
},
save: function (session) {
this.cart = session.cart;
},
updateCart: function (productId, productQty) {
this.cart.cartItem.push({
'productId': productId,
'productQty': productQty
});
},
//deleteItem and other cart operations function goes here...
});