From 5c4e9a9e9d6442c9ead55d0be573ef1c4caa0ee7 Mon Sep 17 00:00:00 2001
From: Johannes <freelon@gmx.net>
Date: Thu, 25 May 2023 23:01:57 +0200
Subject: [PATCH] Day 17 parsing

---
 input/day17.txt    |  8 +++++
 src/main.rs        |  3 +-
 src/tasks/day17.rs | 74 ++++++++++++++++++++++++++++++++++++++++++++++
 src/tasks/mod.rs   |  1 +
 4 files changed, 84 insertions(+), 2 deletions(-)
 create mode 100644 input/day17.txt
 create mode 100644 src/tasks/day17.rs

diff --git a/input/day17.txt b/input/day17.txt
new file mode 100644
index 0000000..293b5af
--- /dev/null
+++ b/input/day17.txt
@@ -0,0 +1,8 @@
+x=495, y=2..7
+y=7, x=495..501
+x=501, y=3..7
+x=498, y=2..4
+x=506, y=1..2
+x=498, y=10..13
+x=504, y=10..13
+y=13, x=498..504
diff --git a/src/main.rs b/src/main.rs
index 3ffc2c2..0d0825e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,3 @@
 fn main() {
-    // aoc_2018::tasks::day24::task1();
-    aoc_2018::tasks::day23::task2();
+    aoc_2018::tasks::day17::task1();
 }
diff --git a/src/tasks/day17.rs b/src/tasks/day17.rs
new file mode 100644
index 0000000..d593fb4
--- /dev/null
+++ b/src/tasks/day17.rs
@@ -0,0 +1,74 @@
+use itertools::Itertools;
+use regex::Regex;
+
+use crate::utils;
+use std::collections::{HashMap, HashSet};
+
+fn horizontal(line: &str) -> Option<(i32, i32, i32)> {
+    let regex = Regex::new(r"y=(?P<y>\d+), x=(?P<x1>\d+)..(?P<x2>\d+)").unwrap();
+    regex.captures(line).map(|m| {
+        (
+            m.name("y").unwrap().as_str().parse::<i32>().unwrap(),
+            m.name("x1").unwrap().as_str().parse::<i32>().unwrap(),
+            m.name("x2").unwrap().as_str().parse::<i32>().unwrap(),
+        )
+    })
+}
+
+fn vertical(line: &str) -> Option<(i32, i32, i32)> {
+    let regex = Regex::new(r"x=(?P<y>\d+), y=(?P<x1>\d+)..(?P<x2>\d+)").unwrap();
+    regex.captures(line).map(|m| {
+        (
+            m.name("y").unwrap().as_str().parse::<i32>().unwrap(),
+            m.name("x1").unwrap().as_str().parse::<i32>().unwrap(),
+            m.name("x2").unwrap().as_str().parse::<i32>().unwrap(),
+        )
+    })
+}
+pub fn task1() {
+    let input = utils::read_file("input/day17.txt");
+    let clay_tiles: HashSet<Pos> = input.lines().fold(HashSet::new(), |mut tiles, line| {
+        if let Some((x, y1, y2)) = vertical(line) {
+            for y in y1..=y2 {
+                tiles.insert(Pos(x, y));
+            }
+        }
+        if let Some((y, x1, x2)) = horizontal(line) {
+            for x in x1..=x2 {
+                tiles.insert(Pos(x, y));
+            }
+        }
+        tiles
+    });
+    let (x_min, x_max) = clay_tiles
+        .iter()
+        .map(|p| p.0)
+        .minmax()
+        .into_option()
+        .unwrap();
+    let (y_min, y_max) = clay_tiles
+        .iter()
+        .map(|p| p.1)
+        .minmax()
+        .into_option()
+        .unwrap();
+
+    dbg!(x_min);
+    dbg!(x_max);
+    dbg!(y_min);
+    dbg!(y_max);
+}
+
+#[derive(PartialEq, Eq, Hash)]
+struct Pos(i32, i32);
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn part1() {
+        assert_eq!(horizontal("y=10, x=5..20"), Some((10, 5, 20)));
+        assert_eq!(vertical("x=10, y=5..20"), Some((10, 5, 20)));
+    }
+}
diff --git a/src/tasks/mod.rs b/src/tasks/mod.rs
index f4df0bd..fc77a7e 100644
--- a/src/tasks/mod.rs
+++ b/src/tasks/mod.rs
@@ -13,6 +13,7 @@ pub mod day12;
 pub mod day13;
 pub mod day14;
 pub mod day15;
+pub mod day17;
 pub mod day20;
 pub mod day22;
 pub mod day23;