bitfeed/src/components/LightningOverlay.svelte
2021-11-26 16:25:31 -06:00

351 lines
9.3 KiB
Svelte

<script>
import analytics from '../utils/analytics.js'
import config from '../config.js'
import { onMount } from 'svelte'
import Overlay from '../components/Overlay.svelte'
import Icon from '../components/Icon.svelte'
import boltIcon from '../assets/icon/cil-bolt-filled.svg'
import tickIcon from '../assets/icon/cil-check-alt.svg'
import timerIcon from '../assets/icon/cil-av-timer.svg'
import { fade } from 'svelte/transition'
import { durationFormat } from '../utils/format.js'
import { overlay } from '../stores.js'
let amount = 5000
let invoice = null
let invoicePaid = false
let invoiceExpired = false
let invoicePoll
let pollingEnabled = false
let invoiceAmountLabel
let invoiceExpiryLabel
let invoiceHexLabel
const invoiceHexPlaceholder = 'lnbcxxxxxxt8l4pp5umz5kyakc0u8z3w2y568entyyq2gafgc3n5a7khdtk5m9fehkxnqdq6gf5hgen9v4jzqer0deshg6t0dccqzpgxqzjcsp5arlylwgraa2u75g4wh40swvxyvt0cpyrmnl4cha40uj5x2fr0t8q9qy9qsqzh3dtfag0ymaf8dpyxrly9p04jwlgdaxkh6g9ysaxyzz7jtrrkpsxv52mlzl6wgn6l6eur9yrl5q2quh5p8kagmng45gqjz9e2c6uxgqx5ezjr'
let qrSrc = null
$: {
if (invoice && invoice.id && invoice.amount && invoice.BOLT11) {
invoiceAmountLabel = `${Number.parseInt(invoice.amount) / 1000} sats`
invoiceHexLabel = invoice.BOLT11
qrSrc = `https://chart.googleapis.com/chart?chs=500x500&chld=L|2&cht=qr&chl=${invoice.BOLT11}`
} else {
stopExpiryTimer()
invoiceAmountLabel = `${amount || 5000} sats`
invoiceHexLabel = invoiceHexPlaceholder
qrSrc = null
}
}
let expiryTick
let expiresIn = null // time till expiry in seconds
$: {
invoiceExpiryLabel = expiresIn == null ? '' : durationFormat.format(expiresIn * 1000)
}
$: {
if ($overlay === 'lightning') {
startExpiryTimer()
stopPollingInvoice()
pollingEnabled = true
pollInvoice()
} else {
stopExpiryTimer()
stopPollingInvoice()
checkResetInvoice()
}
}
function expiryTimer () {
if (invoice && invoice.expiresAt) expiresIn = Math.round(((invoice.expiresAt * 1000) - Date.now()) / 1000)
else expiresIn = null
}
function stopExpiryTimer () {
if (expiryTick) clearInterval(expiryTick)
expiryTick = null
}
function startExpiryTimer () {
if (!expiryTick && $overlay === 'lightning' && invoice && invoice.id) {
expiryTick = setInterval(expiryTimer, 200)
}
}
onMount(() => {
// check for existing invoice in local storage:
const loadedInvoiceJSON = localStorage.getItem(`lightning-invoice`)
localStorage.removeItem('lightning-invoice')
if (loadedInvoiceJSON) {
try {
const loadedInvoice = JSON.parse(loadedInvoiceJSON)
if (loadedInvoice && loadedInvoice.id && loadedInvoice.status && loadedInvoice.status === 'Unpaid' && (loadedInvoice.expiresAt * 1000) > Date.now()) {
invoice = loadedInvoice
processInvoice()
}
} catch (err) {
console.log('error loading/parsing invoice')
}
}
})
function resetInvoice () {
invoicePaid = false
invoiceExpired = false
invoice = null
qrSrc = null
}
function checkResetInvoice () {
if (invoice && invoice.status !== 'Unpaid') resetInvoice()
}
function stopPollingInvoice() {
pollingEnabled = false
if (invoicePoll) clearTimeout(invoicePoll)
invoicePoll = null
}
function processInvoice () {
if (invoice) {
startExpiryTimer()
if (invoice.status === 'Unpaid') {
invoicePaid = false
invoiceExpired = false
localStorage.setItem('lightning-invoice', JSON.stringify(invoice))
invoicePoll = setTimeout(pollInvoice, 2000)
} else if (invoice.status === 'Paid') {
invoicePaid = true
invoiceExpired = false
analytics.trackEvent('donations', 'lightning', 'paid', invoice.amount / 1000)
localStorage.removeItem('lightning-invoice')
} else if (invoice.status === 'Expired') {
invoicePaid = false
invoiceExpired = true
localStorage.removeItem('lightning-invoice')
}
}
}
async function pollInvoice () {
if (pollingEnabled && invoice && invoice.status === 'Unpaid') {
const response = await fetch(`${config.dev ? config.devLightningRoot : ''}/api/lightning/invoice/${invoice.id}`, {
method: 'GET'
})
invoice = await response.json()
processInvoice()
}
}
async function generateInvoice () {
if (amount) {
analytics.trackEvent('donations', 'lightning', 'generate', amount)
resetInvoice()
const response = await fetch(`${config.dev ? config.devLightningRoot : ''}/api/lightning/invoice`, {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({ amount })
})
invoice = await response.json()
if (invoice && invoice.amount) analytics.trackEvent('donations', 'lightning', 'generate-success', invoice.amount / 1000)
processInvoice()
}
}
</script>
<style type="text/scss">
.info {
p {
text-align: justify;
}
.lightning-form {
.sats-input {
position: relative;
display: inline-block;
.units-label {
position: absolute;
top: 0;
right: 1.4em;
bottom: 0;
text-align: right;
color: var(--dark-c);
top: 50%;
transform: translateY(-50%);
}
input {
margin: 0;
}
}
.lightning-button {
background: var(--bold-a);
color: white;
padding: 5px 8px;
margin: .5em;
}
}
.invoice-area {
display: flex;
flex-direction: row;
align-items: stretch;
flex-wrap: wrap;
}
.invoice-info {
position: relative;
padding: 10px;
width: 280px;
min-width: 200px;
margin: .5em;
flex: 1;
.field {
word-break: break-all;
visibility: hidden;
.field-label {
font-weight: bold;
}
.hex {
font-family: monospace;
}
}
.placeholder-overlay {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
width: 100%;
height: 100%;
border-radius: 10px;
background: var(--dark-d);
display: flex;
justify-content: center;
align-items: center;
.placeholder-label {
color: var(--light-a);
opacity: 0.5;
}
}
&.ready {
.field {
visibility: visible;
}
}
}
.qr-container {
position: relative;
flex: 1;
width: 280px;
min-width: 200px;
min-height: 240px;
margin: .5em;
border-radius: 10px;
background: var(--dark-d);
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
.invoice-status {
font-weight: bold;
font-size: 1.6em;
color: white;
}
.invoice-icon {
font-size: 8em;
}
.qr-image-wrapper {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
width: 100%;
height: 100%;
display: flex;
justify-content: center;
align-items: center;
.qr-image {
width: 90%;
height: 90%;
object-fit: contain;
object-position: center;
}
}
&.paid {
background: var(--light-good);
}
&.expired {
background: var(--light-unsure);
}
}
}
</style>
<Overlay name="lightning">
<section class="info">
<h2>Donate with Lightning</h2>
<p>
Enter the amount you would like to donate, then click the button to generate a payment request:
</p>
<div class="lightning-form">
<div class="sats-input">
<input type="number" bind:value={amount}>
<span class="units-label">sats</span>
</div>
<button class="lightning-button" on:click={generateInvoice} >
<Icon icon={boltIcon} color="white" inline />
{#if invoice && invoice.id }
Generate New Request
{:else}
Generate Payment Request
{/if}
</button>
</div>
<div class="invoice-area">
<div class="invoice-info" class:ready={invoice && invoice.id}>
<p class="field invoice-amount"><span class="field-label">Amount:</span> { invoiceAmountLabel }</p>
<p class="field invoice-expires"><span class="field-label">Expiry:</span> { invoiceExpiryLabel }</p>
<p class="field invoice"><span class="field-label">Payment request:</span> <span class="hex">{ invoiceHexLabel }</span></p>
{#if !invoice || !invoice.id }
<div class="placeholder-overlay" transition:fade={{ duration: 300 }}>
<p class="placeholder-label">Payment Request</p>
</div>
{/if}
</div>
<div class="qr-container" class:paid={invoicePaid} class:expired={invoiceExpired}>
{#if invoicePaid }
<div class="invoice-icon"><Icon icon={tickIcon} color="white" /></div>
<h3 class="invoice-status">Received, Thanks!</h3>
{:else if invoiceExpired}
<div class="invoice-icon"><Icon icon={timerIcon} color="white" /></div>
<h3 class="invoice-status">Request Expired</h3>
{:else}
<div class="invoice-icon"><Icon icon={boltIcon} color="white" /></div>
{/if}
{#if qrSrc && !invoicePaid && !invoiceExpired}
<div class="qr-image-wrapper">
<img src={qrSrc} class="qr-image" alt="invoice qr code">
</div>
{/if}
</div>
</div>
</section>
</Overlay>