feat(day02): solve part01

Author: maximiliantech

2023-go/day02/day02.go

@@ -1 +1,99 @@
 package main
+
+import (
+	"github.com/maximiliantech/advent-of-code/2022-go/common"
+	"log"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	lines := common.ReadAllLines("../2023-go/day02/input.txt")
+	log.Println("Day 02 Part 01")
+	partOne(lines)
+	log.Println("Day 02 Part 02")
+}
+
+func partOne(lines []string) {
+	games := readGames(lines)
+	possibleGames := countPossibleGames(games)
+	log.Println(possibleGames)
+}
+
+func countPossibleGames(games []game) int {
+	possibleGames := 0
+	for _, game := range games {
+		if isGamePossible(game) {
+			possibleGames += game.id
+		}
+	}
+	return possibleGames
+}
+
+func isGamePossible(game game) bool {
+	for _, subset := range game.subsets {
+		if subset.red > 12 || subset.green > 13 || subset.blue > 14 {
+			return false
+		}
+	}
+	return true
+}
+
+type game struct {
+	id      int
+	subsets []subset
+}
+
+type subset struct {
+	red   int
+	green int
+	blue  int
+}
+
+func readGames(lines []string) []game {
+	var games []game
+	for _, line := range lines {
+		games = append(games, readGame(line))
+	}
+	return games
+}
+
+func readGame(line string) game {
+	g := game{}
+	s := strings.Split(line, ": ")
+	g.id = readGameId(s[0])
+	g.subsets = readSubsets(s[1])
+	return g
+}
+
+func readGameId(s string) int {
+	s = strings.TrimPrefix(s, "Game ")
+	n, _ := strconv.Atoi(s)
+	return n
+}
+
+func readSubsets(subsetsRaw string) []subset {
+	var subsets []subset
+	sub := strings.Split(subsetsRaw, "; ")
+	for _, subsetRaw := range sub {
+		subsets = append(subsets, readSubset(subsetRaw))
+	}
+	return subsets
+}
+
+func readSubset(subsetRaw string) subset {
+	subset := subset{}
+	s := strings.Split(subsetRaw, ", ")
+	for _, color := range s {
+		c := strings.Split(color, " ")
+		switch c[1] {
+		case "red":
+			subset.red, _ = strconv.Atoi(c[0])
+		case "green":
+			subset.green, _ = strconv.Atoi(c[0])
+		case "blue":
+			subset.blue, _ = strconv.Atoi(c[0])
+		}
+	}
+	return subset
+}