part1.ts

import * as fs from 'fs';
const input = fs
	.readFileSync('input', 'utf8')
	.split('\n\n')
	.map((x) => x.split('\n'));

globalThis.workflows = {};
const { workflows } = globalThis;
const parts = input[1].map((x) => ({
	...JSON.parse(x.replace('{', '{"').replace(/=/g, '":').replace(/,/g, ',"')),
	accepted: false,
}));

for (const line of input[0]) {
	const [workflow, funcs] = line
		.slice(0, -1)
		.split('{')
		.map((x, i) => (i == 1 ? x.split(',') : x));
	let functionString = '';
	for (const func of funcs) {
		if (func.includes('>')) {
			const [greater, than] = func.split('>').map((x, i) => (i == 1 ? x.split(':')[0] : x));
			functionString += `if (part.${greater} > ${than}) return`;
			const then = func.split(':')[1];
			switch (then) {
				case 'A':
					functionString += ' part.accepted = true;\n';
					break;
				case 'R':
					functionString += ';\n';
					break;
				default:
					functionString += ` globalThis.workflows.${then}(part);\n`;
					break;
			}
		} else if (func.includes('<')) {
			const [less, than] = func.split('<').map((x, i) => (i == 1 ? x.split(':')[0] : x));
			functionString += `if (part.${less} < ${than}) return`;
			const then = func.split(':')[1];
			switch (then) {
				case 'A':
					functionString += ' part.accepted = true;\n';
					break;
				case 'R':
					functionString += ';\n';
					break;
				default:
					functionString += ` globalThis.workflows.${then}(part);\n`;
					break;
			}
		} else {
			switch (func) {
				case 'A':
					functionString += 'return part.accepted = true;';
					break;
				case 'R':
					functionString += 'return;';
					break;
				default:
					functionString += `return globalThis.workflows.${func}(part);`;
					break;
			}
		}
	}

	workflows[workflow] = new Function('part', functionString);
}

let result = 0;

for (const part of parts) {
	workflows.in(part);
	if (part.accepted) {
		result += part.x + part.m + part.a + part.s;
	}
}

console.log(result);