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export default class RandomAvatars {
constructor(string, hashcount = 11, ignoreext = true) {
/**
* This creates our avatar.
* Takes in a string and makes an picture out of it.
*/
let string = string;
if (ignoreext) string = removeExts(this, string);
this.hexdigest = crypto.createHash('sha512').update(string).digest('hex');
this.hasharray = [];
// Start this at 4, so earlier is reserved
// 0 = Color
// 1 = Set
// 2 = bgset
// 3 = BG
this.iter = 4;
createhashes(this, hashcount);
this.format = 'png';
}
}
function removeExts(currentClass, string) {
/**
* Sets the input string to create an avatar
*/
// If the user hasn't disabled it, we will detect image extensions, such as .png, .jpg, etc.
// We'll remove them from the string before hashing.
// This ensures that /Bear.png and /Bear.bmp will send back the same image, in different formats.
let input = (String(string)).toLowerCase();
if (input.endsWith('.png') || input.endsWith('.gif') || input.endsWith('.jpg') || input.endsWith('.bmp') || input.endsWith('.jpeg') || input.endsWith('.ppm') || input.endsWith('.datauri')) {
let format = input.substr(input.lastIndexOf('.') + 1, input.length);
if (format.toLowerCase() === 'jpg') format = 'jpg';
currentClass.format = format
input = input.substr(0, input.lastIndexOf('.'));
}
return input;
}
function createhashes(currentClass, count) {
/**
* Breaks up our hash into slots, so we can pull them out later.
* Essentially, it splits our SHA/MD5/etc into X parts.
*/
for (const i of Array(count).keys()) {
// Get 1/numblocks of the hash
const blocksize = parseInt(currentClass.hexdigest.length/count);
const currentStart = ((i + 1) * blocksize) - blocksize;
const currentEnd = (1 +i) * blocksize;
currentClass.hasharray.push(parseInt(currentClass.hexdigest.substr(currentStart, currentEnd), 16));
}
currentClass.hasharray = currentClass.hasharray + currentClass.hasharray
}
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