feat: add solution for p1

internal/2015/DayTwo/code.go

@@ -0,0 +1,33 @@
+package daytwo
+
+import (
+	"advent-of-code/internal/registry"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func init() {
+	registry.Register("2015D2", ParseInput, PartOne, PartTwo)
+}
+
+func ParseInput(filepath string) []string {
+	content, _ := os.ReadFile(filepath)
+	return strings.Split(string(content), "\n")
+}
+
+func PartOne(data []string) int {
+	total := 0
+	for _, line := range data {
+		parts := strings.Split(line, "x")
+		length, _ := strconv.Atoi(parts[0])
+		width, _ := strconv.Atoi(parts[1])
+		height, _ := strconv.Atoi(parts[2])
+		total += 2*length*width + 2*width*height + 2*height*length + min(length*width, width*height, height*length)
+	}
+	return total
+}
+
+func PartTwo(data []string) int {
+	return 0
+}

internal/2015/DayTwo/code_test.go

@@ -0,0 +1,23 @@
+package daytwo
+
+import "testing"
+
+func TestPartOne(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected int
+	}{
+		{"2x3x4", "2x3x4", 58},
+		{"1x1x10", "1x1x10", 43},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := PartOne([]string{tt.input})
+			if got != tt.expected {
+				t.Errorf("PartOne(%q) = %d, want %d", tt.input, got, tt.expected)
+			}
+		})
+	}
+}