dbm/ecommerce/LocalStorageCartLoader.js

import Dbm from "../index.js";

export default class LocalStorageCartLoader extends Dbm.core.BaseObject {
    _construct() {
        super._construct();

        this._changeCommand = Dbm.commands.callFunction(this._changed.bind(this));

        this._isLoading = false;
        this.item.requireProperty("storageKey", "cart");
        this.item.requireProperty("cart", null);
    }

    setCart(aCart) {
        this.item.cart = aCart;
        Dbm.flow.addUpdateCommand(aCart.properties.changeCount, this._changeCommand);

        return this;
    }

    load() {
        //console.log("load");

        let repository = Dbm.getInstance().repository;

        this._isLoading = true;
        try {
            let cartDataString = localStorage.getItem(this.item.storageKey);
            if(cartDataString) {
                let cartData = JSON.parse(cartDataString);
                let currentArray = cartData.lineItems;
                let currentArrayLength = currentArray.length;
                for(let i = 0; i < currentArrayLength; i++) {
                    let currentData = currentArray[i];

                    if(!currentData["type"]) {
                        continue;
                    }

                    let product = null;
                    if(currentData["product"]) {
                        product = repository.getItem(currentData["product"]);
                    }

                    //METODO: encode links in meta
                    let lineItem = this.item.cart.controller.createLineItem(currentData["type"], currentData["quantity"], currentData["meta"]);

                    if(product) {
                        lineItem.setProduct(product);
                    }
                }
            }
        }
        catch(theError) {
            console.error(theError);
        }

        this._isLoading = false;
    }

    _changed() {
        //console.log("_changed");
        
        if(this._isLoading) {
            return;
        }

        let encodedLineItems = [];

        let currentArray = this.item.cart.lineItems;
        let currentArrayLength = currentArray.length;
        for(let i = 0; i < currentArrayLength; i++) {
            let currentData = currentArray[i];

            let meta = currentData.meta.controller.getAsObject();
            //METODO: links in meta
            let encodedData = {"type": currentData.type, "quantity": currentData.quantity, "meta": meta};
            if(currentData.product) {
                encodedData["product"] = currentData.product.id;
            }
            encodedLineItems.push(encodedData);
        }

        console.log(encodedLineItems);

        try {
            let cartDataString = localStorage.setItem(this.item.storageKey, JSON.stringify({"lineItems": encodedLineItems}));
        }
        catch(theError) {
            console.error(theError);
        }
    }
}