2024 day 6 part 1

2024/go/inputs/day6/example.txt

@@ -0,0 +1,10 @@
+....#.....
+.........#
+..........
+..#.......
+.......#..
+..........
+.#..^.....
+........#.
+#.........
+......#...

2024/go/pkg/day6/day6.go

@@ -0,0 +1,20 @@
+package day6
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"os"
+)
+
+func Execute(part string, file *os.File) (int, error) {
+	switch part {
+	case "1":
+		return Part1(file), nil
+	case "2":
+		return Part2(file), nil
+	default:
+		log.Fatalf("unknown part: %s", part)
+		return 0, errors.New(fmt.Sprintf("unknown part: %s", part))
+	}
+}

2024/go/pkg/day6/part1.go

@@ -0,0 +1,109 @@
+package day6
+
+import (
+	"os"
+
+	"strings"
+
+	"github.com/timredband/advent-of-code/pkg/utils"
+)
+
+type Position struct {
+	i         int
+	j         int
+	direction string
+}
+
+func Part1(file *os.File) int {
+	inputs := utils.ReadFile(file)
+
+	board := make([][]string, len(inputs))
+
+	position := Position{direction: "north"}
+	maxPosition := len(inputs) - 1
+
+	for i, v := range inputs {
+		line := strings.Split(v, "")
+		board[i] = line
+
+		for j, c := range line {
+			if c == "^" {
+				position.i = i
+				position.j = j
+			}
+		}
+	}
+
+	for position.i > 0 && position.j < len(inputs) {
+		board[position.i][position.j] = "X"
+
+		if position.direction == "north" {
+			if position.i-1 < 0 {
+				break
+			}
+
+			if board[position.i-1][position.j] == "#" {
+				position.direction = "east"
+			} else {
+				position.i -= 1
+			}
+
+			continue
+		}
+
+		if position.direction == "south" {
+			if position.i+1 > maxPosition {
+				break
+			}
+
+			if board[position.i+1][position.j] == "#" {
+				position.direction = "west"
+			} else {
+				position.i += 1
+			}
+
+			continue
+		}
+
+		if position.direction == "east" {
+			if position.j+1 > maxPosition {
+				break
+			}
+
+			if board[position.i][position.j+1] == "#" {
+				position.direction = "south"
+			} else {
+				position.j += 1
+			}
+
+			continue
+
+		}
+
+		if position.direction == "west" {
+			if position.j-1 < 0 {
+				break
+			}
+
+			if board[position.i][position.j-1] == "#" {
+				position.direction = "north"
+			} else {
+				position.j -= 1
+			}
+
+			continue
+		}
+	}
+
+	result := 0
+
+	for _, row := range board {
+		for _, v := range row {
+			if v == "X" {
+				result += 1
+			}
+		}
+	}
+
+	return result
+}

2024/go/pkg/day6/part2.go

@@ -0,0 +1,7 @@
+package day6
+
+import (
+	"os"
+)
+
+func Part2(file *os.File) int { return 0 }

2024/go/pkg/days/days.go

@@ -10,6 +10,7 @@ import (
 	"github.com/timredband/advent-of-code/pkg/day3"
 	"github.com/timredband/advent-of-code/pkg/day4"
 	"github.com/timredband/advent-of-code/pkg/day5"
+	"github.com/timredband/advent-of-code/pkg/day6"
 )
 
 func Execute(day string, part string, file *os.File) (int, error) {
@@ -24,6 +25,8 @@ func Execute(day string, part string, file *os.File) (int, error) {
 		return day4.Execute(part, file)
 	case "5":
 		return day5.Execute(part, file)
+	case "6":
+		return day6.Execute(part, file)
 	default:
 		return 0, errors.New(fmt.Sprintf("unknown day: %s", day))
 	}

README.md

@@ -1 +1,2 @@
-# advent-of-code
+asadasd# advent-of-code
+