day 2/index.ts

import { readFileSync } from 'fs'

interface Game {
    id: number,
    red: number,
    blue: number,
    green: number
}

const input: string[] | Game[] = readFileSync('./input.txt').toString().split('\n');

function getCubes(string: string, color?: 'red' | 'green' | 'blue'): number {
    let regexp: RegExp;
    switch (color) {
        case 'red': {
            regexp = /(\d+) red/g;
            break;
        }
        case 'green': {
            regexp = /(\d+) green/g;
            break;
        }
        case 'blue': {
            regexp = /(\d+) blue/g;
            break;
        }
        default: {
            regexp = /Game (\d+):/g;
            break;
        }
    }
    const matches = string.matchAll(regexp)
    let max = 0;
    for (const match of matches) {
        if(parseInt(match[1]) > max) max = parseInt(match[1])
    }

    return max

}

const formatted = input.map(game => {
    
    const id = getCubes(game)
    const red = getCubes(game, 'red')
    const blue = getCubes(game, 'blue')
    const green = getCubes(game, 'green')

    return {
        id,
        red,
        green,
        blue
    } as Game
})

const maxes = {
    red: 12,
    green: 13,
    blue: 14
};

// Part One
((games: Game[]) => {
    let sum = 0;
    for(const game of games) {
        if(
            game.red <= maxes.red &&
            game.blue <= maxes.blue &&
            game.green <= maxes.green
        ) sum += game.id
    }
    console.log(sum)
})(formatted);

//Part Two
((games: Game[]) => {
    let sum = 0;
    for(const game of games) {
        sum += game.red * game.green * game.blue
    }
    console.log(sum)
})(formatted);