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script.js
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script.js
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'use strict';
/////////////////////////////////////////////////
/////////////////////////////////////////////////
// BANKIST APP
// Data
const account1 = {
owner: 'Jo Joe',
movements: [200, 455.23, -306.5, 25000, -642.21, -133.9, 79.97, 1300],
interestRate: 1.2, // %
pin: 1111,
movementsDates: [
'2019-11-18T21:31:17.178Z',
'2019-12-23T07:42:02.383Z',
'2020-01-28T09:15:04.904Z',
'2020-04-01T10:17:24.185Z',
'2020-05-08T14:11:59.604Z',
'2021-03-03T17:01:17.194Z',
'2021-03-04T23:36:17.929Z',
'2021-03-06T10:51:36.790Z',
],
currency: 'EUR',
locale: 'pt-PT', // de-DE
};
const account2 = {
owner: 'Jessica Davis',
movements: [5000, 3400, -150, -790, -3210, -1000, 8500, -30],
interestRate: 1.5,
pin: 2222,
movementsDates: [
'2019-11-01T13:15:33.035Z',
'2019-11-30T09:48:16.867Z',
'2019-12-25T06:04:23.907Z',
'2020-01-25T14:18:46.235Z',
'2020-02-05T16:33:06.386Z',
'2020-04-10T14:43:26.374Z',
'2020-06-25T18:49:59.371Z',
'2020-07-26T12:01:20.894Z',
],
currency: 'USD',
locale: 'en-US',
};
const accounts = [account1, account2];
// Elements
const labelWelcome = document.querySelector('.welcome');
const labelDate = document.querySelector('.date');
const labelBalance = document.querySelector('.balance__value');
const labelSumIn = document.querySelector('.summary__value--in');
const labelSumOut = document.querySelector('.summary__value--out');
const labelSumInterest = document.querySelector('.summary__value--interest');
const labelTimer = document.querySelector('.timer');
const containerApp = document.querySelector('.app');
const containerMovements = document.querySelector('.movements');
const btnLogin = document.querySelector('.login__btn');
const btnTransfer = document.querySelector('.form__btn--transfer');
const btnLoan = document.querySelector('.form__btn--loan');
const btnClose = document.querySelector('.form__btn--close');
const btnSort = document.querySelector('.btn--sort');
const inputLoginUsername = document.querySelector('.login__input--user');
const inputLoginPin = document.querySelector('.login__input--pin');
const inputTransferTo = document.querySelector('.form__input--to');
const inputTransferAmount = document.querySelector('.form__input--amount');
const inputLoanAmount = document.querySelector('.form__input--loan-amount');
const inputCloseUsername = document.querySelector('.form__input--user');
const inputClosePin = document.querySelector('.form__input--pin');
/////////
/// Functions
// Date operations
const calcDaysPassed = (date1, date2) =>
Math.floor(Math.abs((date2 - date1) / (1000 * 60 * 60 * 24)));
const formatMovementDate = (date, locale) => {
const daysPassed = calcDaysPassed(new Date(), date);
if (daysPassed === 0) return `Today`;
if (daysPassed === 1) return `Yesterday`;
if (daysPassed <= 7) return `${daysPassed} days ago`;
else {
return new Intl.DateTimeFormat(locale).format(date);
}
};
// Formatting the currencies and numbers
const formattedAmount = (amount, locale, currency) =>
new Intl.NumberFormat(locale, {
style: 'currency',
currency: currency,
}).format(amount);
// Render transactions in the App
const displayMovements = function (account, sort = false) {
containerMovements.innerHTML = '';
const movements = account.movements;
const movementsDates = account.movementsDates;
const movs = sort ? movements.slice().sort((a, b) => a - b) : movements;
movs.forEach((mov, i) => {
const movType = mov > 0 ? 'deposit' : 'withdrawal';
const date = new Date(movementsDates[i]);
const displayDate = formatMovementDate(date, account.locale);
const formattedMov = formattedAmount(mov, account.locale, account.currency);
const html = `
<div class="movements__row">
<div class="movements__type movements__type--${movType}">
${i + 1} ${movType}</div>
<div class="movements__date">${displayDate}</div>
<div class="movements__value">${formattedMov}</div>
</div>
`;
containerMovements.insertAdjacentHTML('afterbegin', html);
});
};
// Calc and display balance
const calcDisplayBalance = function (account) {
account.balance = account.movements.reduce((acc, mov) => acc + mov, 0);
labelBalance.textContent = formattedAmount(
account.balance,
account.locale,
account.currency,
);
};
// Calc and display summary (in, out, interest)
const calcDisplaySummary = function (account) {
const movements = account.movements;
const incomes = movements
.filter((mov) => mov > 0)
.reduce((acc, mov) => acc + mov, 0);
labelSumIn.textContent = formattedAmount(
incomes,
account.locale,
account.currency,
);
const outs = movements
.filter((mov) => mov < 0)
.reduce((acc, mov) => acc + mov, 0);
labelSumOut.textContent = formattedAmount(
Math.abs(outs),
account.locale,
account.currency,
);
const interest = movements
.filter((mov) => mov > 0)
.map((mov) => mov * (account.interestRate / 100))
.filter((mov) => mov >= 1)
.reduce((acc, mov) => acc + mov, 0);
labelSumInterest.textContent = formattedAmount(
interest,
account.locale,
account.currency,
);
};
// Create usernames for accounts based on owners names
const createUsernames = function (accounts) {
accounts.forEach((account) => {
account.username = account.owner
.toLowerCase()
.split(' ')
.map((name) => name.charAt(0))
.join('');
});
};
createUsernames(accounts);
// Update UI functionality
const updateUI = function (account) {
// display movements
displayMovements(account);
// display balance
calcDisplayBalance(account);
// display summary
calcDisplaySummary(account);
};
const startLogOutTimer = function () {
const tick = function () {
// minutes
const min = `${Math.trunc(time / 60)}`.padStart(2, 0);
const sec = `${time % 60}`.padStart(2, 0);
// print the remaining time to UI
labelTimer.textContent = `${min}:${sec}`;
// when timer hits 0 -> stop timer, log out user
if (time === 0) {
clearInterval(timer);
labelWelcome.textContent = 'Log in to get started';
containerApp.style.opacity = 0;
}
// decrease timer on 1s
time--;
};
// set timer for 5 min
let time = 300;
// call tick function immediately
tick();
// call the timer every section
const timer = setInterval(tick, 1000);
return timer;
};
/////////////////////
/// Events Handlers
// Login functionality
let currentAccount;
let timer;
//
// FAKE LOGIN
// currentAccount = account1;
// updateUI(currentAccount);
// containerApp.style.opacity = 100;
//
btnLogin.addEventListener('click', function (e) {
// prevent form from submitting
e.preventDefault();
currentAccount = accounts.find(
(account) => account.username === inputLoginUsername.value,
);
if (currentAccount?.pin === Number(inputLoginPin.value)) {
// display UI and welcome message
labelWelcome.textContent = `Welcome back, ${currentAccount.owner.split(' ')[0]
}`;
containerApp.style.opacity = 100;
// Current date
const now = new Date();
const dateOptions = {
weekday: 'long',
day: 'numeric',
month: 'long',
year: 'numeric',
hour: 'numeric',
minute: 'numeric',
};
labelDate.textContent = new Intl.DateTimeFormat(
currentAccount.locale,
dateOptions,
).format(now);
// clear input fields
inputLoginUsername.value = '';
inputLoginPin.value = '';
inputLoginPin.blur();
// clear all timers for other users
if (timer) clearInterval(timer);
// start log out timer
timer = startLogOutTimer();
// show UI for logged in user
updateUI(currentAccount);
}
});
// Transfer functionality
btnTransfer.addEventListener('click', function (e) {
e.preventDefault();
const amount = Number(inputTransferAmount.value);
const receiverAccount = accounts.find(
(account) => account.username === inputTransferTo.value,
);
// clear input fields in Transfer money section
inputTransferAmount.value = '';
inputTransferTo.value = '';
inputTransferAmount.blur();
if (
amount > 0 &&
receiverAccount &&
currentAccount.balance >= amount &&
receiverAccount.username !== currentAccount.username
) {
// perform transaction
currentAccount.movements.push(-amount);
receiverAccount.movements.push(amount);
// add transfer date
currentAccount.movementsDates.push(new Date().toISOString());
receiverAccount.movementsDates.push(new Date().toISOString());
// update UI
updateUI(currentAccount);
// reset timer
clearInterval(timer);
timer = startLogOutTimer();
}
});
//Request loan functionality
btnLoan.addEventListener('click', function (e) {
e.preventDefault();
const amount = Math.floor(inputLoanAmount.value);
if (
amount > 0 &&
currentAccount.movements.some((mov) => mov >= amount * 0.1)
) {
setTimeout(function () {
currentAccount.movements.push(amount);
currentAccount.movementsDates.push(new Date().toISOString());
updateUI(currentAccount);
// reset timer
clearInterval(timer);
timer = startLogOutTimer();
}, 3000);
}
// clear input field in Loan request section
inputLoanAmount.value = '';
inputLoanAmount.blur();
});
// Close (delete) account
btnClose.addEventListener('click', function (e) {
e.preventDefault();
// check credentials
if (
currentAccount?.username === inputCloseUsername.value &&
currentAccount?.pin === Number(inputClosePin.value)
) {
// remove account from the account list
const index = accounts.findIndex(
(account) => account.username === currentAccount.username,
);
accounts.splice(index, 1);
// log out (hide UI)
containerApp.style.opacity = 0;
}
// clear input fields in Close account section
inputCloseUsername.value = '';
inputClosePin.value = '';
});
// Sorting functionality
let sorted = false;
btnSort.addEventListener('click', function () {
displayMovements(currentAccount, !sorted);
sorted = !sorted;
});
/////////////////////////////////////////////////
/////////////////////////////////////////////////
// LECTURES
const currencies = new Map([
['USD', 'United States dollar'],
['EUR', 'Euro'],
['GBP', 'Pound sterling'],
]);
const movements = [200, 450, -400, 3000, -650, -130, 70, 1300];
/////////////////////////////////////////////////