From 347f3472f9af800b1e2a55e8d574d34059f96057 Mon Sep 17 00:00:00 2001
From: Stefan Harmuth <stefan.harmuth@net-m.de>
Date: Thu, 7 Jan 2021 09:01:58 +0100
Subject: [PATCH] day02

---
 day02/day.go  | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++
 inputs/2      |  5 +++++
 inputs/2_test |  4 ++++
 main.go       |  3 ++-
 4 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 day02/day.go
 create mode 100644 inputs/2
 create mode 100644 inputs/2_test

diff --git a/day02/day.go b/day02/day.go
new file mode 100644
index 0000000..42cd359
--- /dev/null
+++ b/day02/day.go
@@ -0,0 +1,61 @@
+package day02
+
+import (
+	"tools"
+)
+
+func getCodeFromDirections(keypad [][]string, startX, startY int, instructions []string) string {
+	x := startX
+	y := startY
+
+	code := ""
+	for _, line := range instructions {
+		for _, inst := range line {
+			switch inst {
+			case 'L':
+				if x > 0 && keypad[y][x-1] != "x" {
+					x--
+				}
+			case 'R':
+				if x < len(keypad[0])-1 && keypad[y][x+1] != "x" {
+					x++
+				}
+			case 'U':
+				if y > 0 && keypad[y-1][x] != "x" {
+					y--
+				}
+			case 'D':
+				if y < len(keypad)-1 && keypad[y+1][x] != "x" {
+					y++
+				}
+			}
+		}
+		code += keypad[y][x]
+	}
+
+	return code
+}
+
+func Part1(puzzle tools.AoCPuzzle) interface{} {
+	instructions := puzzle.GetInputArray()
+	keypad := [][]string{
+		{"1", "2", "3"},
+		{"4", "5", "6"},
+		{"7", "8", "9"},
+	}
+
+	return getCodeFromDirections(keypad, 1, 1, instructions)
+}
+
+func Part2(puzzle tools.AoCPuzzle) interface{} {
+	instructions := puzzle.GetInputArray()
+	keypad := [][]string{
+		{"x", "x", "1", "x", "x"},
+		{"x", "2", "3", "4", "x"},
+		{"5", "6", "7", "8", "9"},
+		{"x", "A", "B", "C", "x"},
+		{"x", "x", "D", "x", "x"},
+	}
+
+	return getCodeFromDirections(keypad, 0, 2, instructions)
+}
diff --git a/inputs/2 b/inputs/2
new file mode 100644
index 0000000..e66bf56
--- /dev/null
+++ b/inputs/2
@@ -0,0 +1,5 @@
+LLLRLLULLDDLDUDRDDURLDDRDLRDDRUULRULLLDLUURUUUDLUUDLRUDLDUDURRLDRRRUULUURLUDRURULRLRLRRUULRUUUDRRDDRLLLDDLLUDDDLLRLLULULRRURRRLDRLDLLRURDULLDULRUURLRUDRURLRRDLLDDURLDDLUDLRLUURDRDRDDUURDDLDDDRUDULDLRDRDDURDLUDDDRUDLUDLULULRUURLRUUUDDRLDULLLUDLULDUUDLDLRRLLLRLDUDRUULDLDRDLRRDLDLULUUDRRUDDDRDLRLDLRDUDRULDRDURRUULLUDURURUUDRDRLRRDRRDRDDDDLLRURULDURDLUDLUULDDLLLDULUUUULDUDRDURLURDLDDLDDUULRLUUDLDRUDRURURRDDLURURDRLRLUUUURLLRR
+UUUUURRRURLLRRDRLLDUUUUDDDRLRRDRUULDUURURDRLLRRRDRLLUDURUDLDURURRLUDLLLDRDUDRDRLDRUDUDDUULLUULLDUDUDDRDUUUDLULUDUULLUUULURRUDUULDUDDRDURRLDDURLRDLULDDRUDUDRDULLRLRLLUUDDURLUUDLRUUDDLLRUURDUDLLDRURLDURDLRDUUDLRLLRLRURRUDRRLRDRURRRUULLUDLDURDLDDDUUDRUUUDULLLRDRRDRLURDDRUUUDRRUUDLUDDDRRRRRLRLDLLDDLRDURRURLLLULURULLULRLLDDLDRLDULLDLDDDRLUDDDUDUDRRLRDLLDULULRLRURDLUDDLRUDRLUURRURDURDRRDRULUDURRLULUURDRLDLRUDLUDRURLUDUUULRRLRRRULRRRLRLRLULULDRUUDLRLLRLLLURUUDLUDLRURUDRRLDLLULUDRUDRLLLRLLDLLDUDRRURRLDLUUUURDDDUURLLRRDRUUURRRDRUDLLULDLLDLUDRRDLLDDLDURLLDLLDLLLDR
+LRDULUUUDLRUUUDURUUULLURDRURDRRDDDLRLRUULDLRRUDDLLUURLDRLLRUULLUDLUDUDRDRDLUUDULLLLRDDUDRRRURLRDDLRLDRLULLLRUUULURDDLLLLRURUUDDDLDUDDDDLLLURLUUUURLRUDRRLLLUUULRDUURDLRDDDUDLLRDULURURUULUDLLRRURDLUULUUDULLUDUUDURLRULRLLDLUULLRRUDDULRULDURRLRRLULLLRRDLLDDLDUDDDUDLRUURUDUUUDDLRRDLRUDRLLRDRDLURRLUDUULDRRUDRRUDLLLLRURRRRRUULULLLRDRDUDRDDURDLDDUURRURLDRRUDLRLLRRURULUUDDDLLLRDRLULLDLDDULDLUUDRURULLDLLLLDRLRRLURLRULRDLLULUDRDR
+RURRRUDLURRURLURDDRULLDRDRDRRULRRDLDDLDUUURUULLRRDRLDRRDRULLURRRULLLDULDDDDLULRUULRURUDURDUDRLRULLLRDURDDUDDRDLURRURUURDLDDDDDURURRURLLLDDLDRRDUDDLLLDRRLDDUUULDLLDRUURUDDRRLDUULRRDDUDRUULRLDLRLRUURLLDRDLDRLURULDLULDRULURLLRRLLDDDURLRUURUULULRLLLULUDULUUULDRURUDDDUUDDRDUDUDRDLLLRDULRLDLRRDRRLRDLDDULULRLRUUDDUDRRLUDRDUUUDRLLLRRLRUDRRLRUUDDLDURLDRRRUDRRDUDDLRDDLULLDLURLUUDLUDLUDLDRRLRRRULDRLRDUURLUULRDURUDUUDDURDDLRRRLUUUDURULRURLDRURULDDUDDLUDLDLURDDRRDDUDUUURLDLRDDLDULDULDDDLDRDDLUURDULLUDRRRULRLDDLRDRLRURLULLLDULLUUDURLDDULRRDDUULDRLDLULRRDULUDUUURUURDDDRULRLRDLRRURR
+UDDDRLDRDULDRLRDUDDLDLLDDLUUURDDDLUDRDUDLDURLUURUDUULUUULDUURLULLRLUDLLURUUUULRLRLLLRRLULLDRUULURRLLUDUDURULLLRRRRLRUULLRDRDRRDDLUDRRUULUDRUULRDLRDRRLRRDRRRLULRULUURRRULLRRRURUDUURRLLDDDUDDULUULRURUDUDUDRLDLUULUDDLLLLDRLLRLDULLLRLLDLUUDURDLLRURUUDDDDLLUDDRLUUDUDRDRLLURURLURRDLDDDULUURURURRLUUDUDLDLDDULLURUDLRLDLRLDLDUDULURDUDRLURRRULLDDDRDRURDDLDLULUDRUULDLULRDUUURLULDRRULLUDLDRLRDDUDURRRURRLRDUULURUUDLULDLRUUULUDRDRRUDUDULLDDRLRDLURDLRLUURDRUDRDRUDLULRUDDRDLLLRLURRURRLDDDUDDLRDRRRULLUUDULURDLDRDDDLDURRLRRDLLDDLULULRRDUDUUDUULRDRRDURDDDDUUDDLUDDUULDRDDULLUUUURRRUUURRULDRRDURRLULLDU
\ No newline at end of file
diff --git a/inputs/2_test b/inputs/2_test
new file mode 100644
index 0000000..49be97c
--- /dev/null
+++ b/inputs/2_test
@@ -0,0 +1,4 @@
+ULL
+RRDDD
+LURDL
+UUUUD
\ No newline at end of file
diff --git a/main.go b/main.go
index 54af919..ea85c46 100644
--- a/main.go
+++ b/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"aoc2016/day01"
+	"aoc2016/day02"
 	"flag"
 	"fmt"
 	"os"
@@ -20,7 +21,7 @@ var myDir, _ = filepath.Abs(filepath.Dir(os.Args[0]))
 func initDayFunctions() {
 	dayFunctions = map[int]map[int]func(puzzle tools.AoCPuzzle) interface{}{
 		1: {1: day01.Part1, 2: day01.Part2},
-		//		2:  {1: day02.Part1, 2: day02.Part2},
+		2: {1: day02.Part1, 2: day02.Part2},
 		//		3:  {1: day03.Part1, 2: day03.Part2},
 		//		4:  {1: day04.Part1, 2: day04.Part2},
 		//		5:  {1: day05.Part1, 2: day05.Part2},