emoji-packer.cjs

const emojilist=require("./EmojiList/data-by-group.json");
console.log(emojilist);

const buffer=new ArrayBuffer(2**26);
const view = new DataView(buffer, 0);
let i=0;
function write16(numb){
	view.setUint16(i,numb);
	i+=2;
}
function write8(numb){
	view.setUint8(i,numb);
	i+=1;
}
function writeString8(str){
	const encode=new TextEncoder("utf-8").encode(str);
	write8(encode.length);
	for(const thing of encode){
		write8(thing);
	}
}
function writeString16(str){
	const encode=new TextEncoder("utf-8").encode(str);
	write16(encode.length);
	for(const thing of encode){
		write8(thing);
	}
}
function writeStringNo(str){
	const encode=new TextEncoder("utf-8").encode(str);
	for(const thing of encode){
		write8(thing);
	}
}

write16(emojilist.length);
for(const thing of emojilist){
	writeString16(thing.name);
	write16(thing.emojis.length);
	for(const emoji of thing.emojis){
		writeString8(emoji.name);
		write8(new TextEncoder("utf-8").encode(emoji.emoji).length+128*emoji.skin_tone_support);
		writeStringNo(emoji.emoji);
	}
}
const out=new ArrayBuffer(i);
const ar=new Uint8Array(out);
const br=new Uint8Array(buffer);
for(const thing in ar){
	ar[thing]=br[thing];
}
console.log(i,ar);

function decodeEmojiList(buffer){
	const view = new DataView(buffer, 0);
	let i=0;
	function read16(){
		const int=view.getUint16(i);
		i+=2;
		return int;
	}
	function read8(){
		const int=view.getUint8(i);
		i+=1;
		return int;
	}
	function readString8(){
		return readStringNo(read8());
	}
	function readString16(){
		return readStringNo(read16());
	}
	function readStringNo(length){
		const array=new Uint8Array(length);

		for(let i=0;i<length;i++){
			array[i]=read8();
		}
		//console.log(array);
		return new TextDecoder("utf-8").decode(array.buffer);
	}
	const build=[];
	let cats=read16();

	for(;cats!==0;cats--){
		const name=readString16();
		const emojis=[];
		let emojinumber=read16();
		for(;emojinumber!==0;emojinumber--){
			//console.log(emojis);
			const name=readString8();
			const len=read8();
			const skin_tone_support=len>127;
			const emoji=readStringNo(len-skin_tone_support*128);
			emojis.push({
				name,
				skin_tone_support,
				emoji
			});
		}
		build.push({
			name,
			emojis
		});
	}
	return build;
}
console.log(JSON.stringify(decodeEmojiList(out)));

const fs = require("node:fs");
fs.writeFile("./webpage/emoji.bin",new Uint8Array(out),_=>{

});