idle-buildup/js/app.js

let game = new Vue({
    el: '#root',
    data: {
        money: 0,
        resources: {
            wood: 0,
            stone: 0
        },
        buildings: [
            {
                name: 'Bank',
                intervalInSeconds: 15,
                amount: 100,
                level: 1,
                price: 1000,
                resource: 'gold',
                isOwned: true,
                isUpgradeable: true,
                maxLevel: 20,
                priceMultiplicator: 10,
                intervalMultiplicator: 0.95,
                icon: 'medieval_largeCastle'
            },
            {
                name: 'Lumberjack',
                intervalInSeconds: 10,
                amount: 2,
                level: 0,
                price: 100,
                resource: 'wood',
                isOwned: false,
                isUpgradeable: true,
                maxLevel: 15,
                priceMultiplicator: 2,
                intervalMultiplicator: 0.95,
                icon: 'medieval_lumber'
            },
            {
                name: 'Quarry',
                intervalInSeconds: 20,
                amount: 2,
                level: 0,
                price: 250,
                resource: 'stone',
                isOwned: false,
                isUpgradeable: true,
                maxLevel: 15,
                priceMultiplicator: 2,
                intervalMultiplicator: 0.95,
                icon: 'medieval_mine'
            },
        ],
        loadedIntervals: []
    },
    created() {
        this.money = this.getSavedMoney();
        this.saveMoney();

        this.reloadBuildings();
    },
    methods: {
        saveMoney() {
            localStorage.setItem('money', String(this.money));
            return this.getSavedMoney();
        },

        getSavedMoney() {
            this.money = Number(localStorage.getItem('money') ?? 0);
            return this.money;
        },

        add(amount = 0, resource = 'gold') {
            switch (resource) {
                case 'wood':
                   this.resources.wood += amount;
                   break;
                case 'stone':
                   this.resources.stone += amount;
                   break;
                case 'gold':
                   this.money += amount;
                   break;
            }
            
            return this.saveMoney();
        },

        sub(amount = 0, resource = false) {
            this.money -= amount;
            return this.saveMoney();
        },

        getAmount() {
            return this.money;
        },

        getAmountFormatted() {
            return Intl.NumberFormat('de-DE', {style: 'currency', currency: 'EUR'}).format(this.money);
        },

        reloadBuildings() {
            this.killIntervals();

            let game = this;
            this.buildings.forEach((building) => {
                if (building.isOwned) {
                    game.initiateIntervals(building);
                }
            });
        },
        
        initiateIntervals(building) {
            building.intervalEarnID = setInterval(() => {
                            game.add(building.amount, building.resource);
                        }, building.intervalInSeconds * 1000);
                    
                    building.intervalLoadingID = setInterval(() => {
                        if (building.loader < 100) {
                            building.loader += 10;
                        } else {
                            building.loader = 10;
                        }

                        game.$forceUpdate()
                    }, building.intervalInSeconds / 10 * 1000)
                   

                    this.loadedIntervals.push(building.intervalEarnID, building.intervalLoadingID);
        },

        killIntervals() {
            this.buildings.forEach((building) => {
                building.loader = 0;
            });

            this.loadedIntervals.forEach((interval) => {
                clearInterval(interval)
            });
        },

        buyBuilding(building) {
            if (this.money >= building.price) {
                this.sub(building.price);
                building.isOwned = true;

                this.upgradeBuilding(building, true);
                this.saveBuildings();
            } else {
                alert('Not enough money');
            }
        },

        buyUpgrade(building) {
            if (building.level === 'MAX') {
                alert('Already at MAX-Level');
                return false;
            }

            if (this.money >= building.price) {
                this.sub(building.price);
                this.upgradeBuilding(building);
            } else {
                alert('Not enough money');
            }
        },

        upgradeBuilding(building, first = false) {
            // this.killIntervals();

            if (building.level < (building.maxLevel - 1)) {
                building.level++;
            } else {
                building.level = 'MAX';
                building.isUpgradeable = false;
            }

            building.price = Number(building.price * building.priceMultiplicator).toFixed(2);

            if (first === false) {
                building.intervalInSeconds = Number(building.intervalInSeconds * building.intervalMultiplicator).toFixed(2);
            }

            // this.reloadBuildings();
            this.reloadSingleBuilding(building);
            this.saveBuildings();
        },
        
        reloadSingleBuilding(building) {
            clearInterval(building.intervalEarnID);
            clearInterval(building.intervalLoadingID);
            building.loader = 10;
            
            this.initiateIntervals(building);
        },

        saveBuildings() {
            localStorage.setItem('buildings', JSON.stringify(this.buildings));
        },

        loadBuildings: function () {
            let savedBuildings = JSON.parse(localStorage.getItem('buildings'));

            if (savedBuildings.length > 0) {
                this.buildings = savedBuildings;
            }
        }
    },
});