File size: 1,934 Bytes
c6535db | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | import pako from 'pako';
function utf8Decode(bytes) {
let str = '';
for (let i = 0; i < bytes.length; i++) {
let byte = bytes[i];
if (byte < 0x80) {
str += String.fromCharCode(byte); // ASCII
} else if (byte > 0xBF && byte < 0xE0) {
let next = bytes[++i];
str += String.fromCharCode((byte & 0x1F) << 6 | (next & 0x3F));
} else if (byte > 0xDF && byte < 0xF0) {
let next1 = bytes[++i], next2 = bytes[++i];
str += String.fromCharCode(
(byte & 0x0F) << 12 | (next1 & 0x3F) << 6 | (next2 & 0x3F)
);
}
}
return str;
}
const input = atob('SDRzSQ==');
const output = atob('Q29tZnlVSQ==');
export const useBase64ToCanvasJson = (x) => {
let g = null;
let base64Data = x.replace(output,input)
let binaryStr = atob(base64Data);
let bytes = new Uint8Array(binaryStr.length);
for (let i = 0; i < binaryStr.length; i++) {
bytes[i] = binaryStr.charCodeAt(i);
}
let jsonString;
const isGzip = base64Data.startsWith('H4sI');
try {
if (isGzip) {
const decompressedData = pako.inflate(bytes);
jsonString = utf8Decode(decompressedData);
} else {
jsonString = utf8Decode(bytes);
}
} catch (error) {
jsonString = utf8Decode(bytes);
}
g = JSON.parse(jsonString);
return g;
}
export const useCanvasJsonToBase64 = (canvasJson) => {
if (!canvasJson) return;
const jsonString = JSON.stringify(canvasJson);
const bytes = new TextEncoder().encode(jsonString);
const compressedData = pako.gzip(bytes);
let binary = '';
const len = compressedData.length;
for (let i = 0; i < len; i++) {
binary += String.fromCharCode(compressedData[i]);
}
let base64Data = btoa(binary);
base64Data = base64Data.replace(input, output);
return base64Data;
} |