chore: make language folders snake_case

2 files changed, 198 insertions, 0 deletions

diff --git a/2023/go/internal/day_02/part_02/part_02.go b/2023/go/internal/day_02/part_02/part_02.go
new file mode 100644
index 0000000..ffb9691
--- /dev/null
+++ b/2023/go/internal/day_02/part_02/part_02.go
@@ -0,0 +1,114 @@
+package part_02
+
+import (
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+type cubes struct {
+	red   int
+	blue  int
+	green int
+}
+
+func Solve() {
+	contents, err := os.ReadFile("../_input/day_02.txt")
+	if err != nil {
+		panic(err)
+	}
+
+	lines := strings.Split(string(contents), "\n")
+	answer := processLines(lines)
+
+	println(answer)
+}
+
+func processLines(lines []string) int {
+	var answer int
+
+	for _, line := range lines {
+		if line == "" || line == "\n" {
+			continue
+		}
+
+		shownCubes := convertLineToCubes(line)
+
+		maxCubes := getMaximumCubes(shownCubes)
+		power := getPower(maxCubes)
+		answer += power
+	}
+
+	return answer
+}
+
+func convertLineToCubes(line string) []cubes {
+	var shownCubes []cubes
+
+	redRegex := regexp.MustCompile(`(\d+) red`)
+	blueRegex := regexp.MustCompile(`(\d+) blue`)
+	greenRegex := regexp.MustCompile(`(\d+) green`)
+
+	for _, round := range strings.Split(line, ";") {
+		var cubes cubes
+
+		redMatches := redRegex.FindStringSubmatch(round)
+		if redMatches != nil {
+			red, err := strconv.Atoi(redMatches[1])
+			if err != nil {
+				panic("Could not convert red to int: " + redMatches[1])
+			} else {
+				cubes.red = red
+			}
+		}
+
+		blueMatches := blueRegex.FindStringSubmatch(round)
+		if blueMatches != nil {
+			blue, err := strconv.Atoi(blueMatches[1])
+			if err != nil {
+				panic("Could not convert green to int: " + blueMatches[1])
+			} else {
+				cubes.blue = blue
+			}
+		}
+
+		greenMatches := greenRegex.FindStringSubmatch(round)
+		if greenMatches != nil {
+			green, err := strconv.Atoi(greenMatches[1])
+			if err != nil {
+				panic("Could not convert green to int: " + greenMatches[1])
+			} else {
+				cubes.green = green
+			}
+		}
+
+		shownCubes = append(shownCubes, cubes)
+	}
+
+	return shownCubes
+}
+
+func getMaximumCubes(shownCubes []cubes) cubes {
+	var maxCubes cubes
+
+	for _, cubes := range shownCubes {
+		if cubes.red > maxCubes.red {
+			maxCubes.red = cubes.red
+		}
+
+		if cubes.blue > maxCubes.blue {
+			maxCubes.blue = cubes.blue
+		}
+
+		if cubes.green > maxCubes.green {
+			maxCubes.green = cubes.green
+		}
+	}
+
+	return maxCubes
+}
+
+func getPower(maxCubes cubes) int {
+	return maxCubes.red * maxCubes.blue * maxCubes.green
+}
diff --git a/2023/go/internal/day_02/part_02/part_02_test.go b/2023/go/internal/day_02/part_02/part_02_test.go
new file mode 100644
index 0000000..6952899
--- /dev/null
+++ b/2023/go/internal/day_02/part_02/part_02_test.go
@@ -0,0 +1,84 @@
+package part_02
+
+import (
+	"testing"
+)
+
+type data struct {
+	shownCubes []cubes
+	maxCubes   cubes
+	line       string
+}
+
+var testInput = []data{
+	{
+		shownCubes: []cubes{
+			{red: 4, blue: 3},
+			{red: 1, blue: 6, green: 2},
+			{green: 2},
+		},
+		maxCubes: cubes{red: 4, blue: 6, green: 2},
+		line:     "Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green",
+	},
+	{
+		shownCubes: []cubes{
+			{blue: 1, green: 2},
+			{red: 1, blue: 4, green: 3},
+			{blue: 1, green: 1},
+		},
+		maxCubes: cubes{red: 1, blue: 4, green: 3},
+		line:     "Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue",
+	},
+	{
+		shownCubes: []cubes{
+			{red: 20, blue: 6, green: 8},
+			{red: 4, blue: 5, green: 13},
+			{red: 1, green: 5},
+		},
+		maxCubes: cubes{red: 20, blue: 6, green: 13},
+		line:     "Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red",
+	},
+	{
+		shownCubes: []cubes{
+			{red: 3, blue: 6, green: 1},
+			{red: 6, green: 3},
+			{red: 14, blue: 15, green: 3},
+		},
+		maxCubes: cubes{red: 14, blue: 15, green: 3},
+		line:     "Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red",
+	},
+	{
+		shownCubes: []cubes{
+			{red: 6, blue: 1, green: 3},
+			{red: 1, blue: 2, green: 2},
+		},
+		maxCubes: cubes{red: 6, blue: 2, green: 3},
+		line:     "Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green",
+	},
+}
+
+func TestConvertLineToCubes(t *testing.T) {
+	for _, data := range testInput {
+		actualCubes := convertLineToCubes(data.line)
+
+		if len(data.shownCubes) != len(actualCubes) {
+			t.Errorf("Expected length of shownCubes to be %d, got %d", len(data.shownCubes), len(actualCubes))
+		}
+
+		for i, cubes := range data.shownCubes {
+			if cubes != actualCubes[i] {
+				t.Errorf("Expected shownCubes to be %v, got %v", cubes, actualCubes[i])
+			}
+		}
+	}
+}
+
+func TestGetMaximumCubes(t *testing.T) {
+	for _, data := range testInput {
+		actualMaxCubes := getMaximumCubes(data.shownCubes)
+
+		if actualMaxCubes != data.maxCubes {
+			t.Errorf("Expected maxCubes to be %v, got %v", data.maxCubes, actualMaxCubes)
+		}
+	}
+}