Day 17 parsing

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)));
+    }
+}

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;