I am building a plugin for FIGMA, where the user selects multiple images, which I then save in an array, that I send to be interpreted.
I have 2 issues with my code
I would appreciate your help figuring this out. Thank you P.S. this is pure javascript, and you don't need to know FIGMA to follow the code.
<input type="file" id="images" accept="image/png" multiple />
<button id="button">Create image</button>
<script>
const button = document.getElementById('button');
button.onclick = () => {
const files = document.getElementById('images').files;
function readFile(index) {
console.log(1);
if (index >= files.length) {return};
console.log(2);
const file = files[index];
const imageCaption = file.name;
var reader = new FileReader();
reader.readAsArrayBuffer(file);
reader.onload = function (e) {
console.log(4);
// get file content
const bin = e.target.result;
const imageBytes = new Uint8Array(bin);
//Get Image width and height
var img = new Image();
img.src = bin;
img.onload = function () {
console.log(6);
const width = img.width;
const height = img.height;
console.log("imageCaption: " + imageCaption);
console.log("width: " + width);
console.log("height: " + height);
console.log("imageBytes: " + imageBytes);
var data = {imageBytes, imageCaption, width, height};
//Read Next File
nextData = readFile(index + 1);
if( nextData ) {
data.concat(nextData)
}
return data;
}
}
}
//Call function to Read and Send Images
const imageData = readFile(0);
//Send Data
parent.postMessage({
pluginMessage: {
type: 'send-image',
imageData,
}
}, '*');
A friend ended up helping me with it. Thank you Hiba!
const button = document.getElementById('button');
const input = document.getElementById('input');
button.addEventListener('click', async () => {
const files = input.files ? [...input.files] : [];
const data = await Promise.all(
files.map(async (file) => await getImageData(file))
);
console.log(data);
});
async function getImageData(file) {
// get binary data from file
const bin = await file.arrayBuffer();
// translate bin data into bytes
const imageBytes = new Uint8Array(bin)
// create data blob from bytes
const blob = new Blob([imageBytes], { type: "image/png" });
// create html image element and assign blob as src
const img = new Image();
img.src = URL.createObjectURL(blob);
// get width and height from rendered image
await img.decode();
const { width, height } = img;
const data = { image: blob, caption: file.name, width, height };
return data;
}