/*
{
"p": "brc69",
"op": "compile",
"s": "p1pp0"
}
*/
// EDIT
const collectionJsonUrl = '/content/52bc0c1d62570209d75dc58345a941fb7d580524a0ca5fd2db2e6df5948acca0i0';
const previewUrl = '' // if preview available
const imageRendering = 'auto' // or pixelated
const renderSize = { width: 500, height: 500 }; // select image render size
async function loadImage (url) {
return new Promise((resolve, reject) => {
const image = document.createElement('img')
image.src = url
image.crossOrigin = 'anonymous'
image.onload = () => {
resolve(image)
}
image.onerror = () => {
// Some display fallbacks for when the image fails to load
if (!image.src.startsWith('https://')) {
image.src = 'https://ordinals.com' + url
} else if (image.src.startsWith('https://ordinals.com')) {
image.src = 'https://ord-mirror.magiceden.dev' + url
}
}
})
}
async function renderImage(imageEl, urls) {
const canvas = document.createElement('canvas');
canvas.width = renderSize.width;
canvas.height = renderSize.height;
const ctx = canvas.getContext("2d");
ctx.imageSmoothingEnabled = false;
const images = await Promise.all((urls).map(loadImage))
images.forEach(_ => ctx.drawImage(_, 0, 0, canvas.width, canvas.height))
imageEl.src = canvas.toDataURL("image/png")
}
async function getAllTraits(traitsUrl, retry = false) {
try {
const collectionMetadataRes = await fetch(traitsUrl)
const collectionMetadata = await collectionMetadataRes.json()
return collectionMetadata.attributes.map(_ => `/content/${_}`)
} catch (e) {
if (!retry) {
const timestamp = Math.floor(Date.now() / (60000 * 10)) // 10 minutes
const newTraitsUrl = `${traitsUrl}?timestamp=${timestamp}`
return getAllTraits(newTraitsUrl, true)
}
throw e
}
}
function createInitialImage () {
// Manipulate the tag
document.body.style.margin = '0px';
document.body.style.padding = '0px';
// Create and set properties of the ![]()
tag
const img = document.createElement('img');
img.id = 'img';
img.style.height = '100%';
img.style.width = '100%';
img.style.objectFit = 'contain';
img.style.imageRendering = imageRendering;
return img
}
async function createInscriptionHtml() {
const imageEl = createInitialImage()
try {
// Get traits
const allTraits = await getAllTraits(collectionJsonUrl)
// Process traits
const selectedTraitIndexes = document.querySelector('script[t]').getAttribute('t').split(',');
const indexes = selectedTraitIndexes.map(_ => +_)
const traits = selectedTraitIndexes.map(_ => allTraits[+_])
// Render traits
await renderImage(imageEl, traits);
} catch (e) {
console.error(e)
// Render previewUrl image
if (previewUrl) {
imageEl.src = previewUrl
}
} finally {
// Append the ![]()
tag to the
document.body.appendChild(imageEl);
}
}
window.onload = function() {
createInscriptionHtml();
}