feat: initial commit

src/main.rs

@@ -0,0 +1,73 @@
+use std::time::Instant;
+
+mod common;
+mod solutions;
+
+fn main() {
+    if let Err(e) = dotenvy::dotenv() {
+        eprintln!("Could not load .env: {e}");
+    }
+
+    let args = std::env::args().collect::<Vec<_>>();
+
+    let day = args
+        .get(1)
+        .and_then(|n| n.parse::<u8>().ok())
+        .expect("day is not a number");
+
+    let part = args
+        .get(2)
+        .and_then(|n| n.chars().next())
+        .expect("part is not a letter");
+
+    let Some(solution) = solutions::SOLUTIONS.get((day - 1) as usize) else {
+        eprintln!("[-] Day {} not implemented", day);
+        return;
+    };
+
+    let input = load(day).unwrap();
+
+    println!(
+        "[*] Running: {} ({}-{})",
+        solution.name(),
+        day,
+        part.to_uppercase()
+    );
+
+    let start = Instant::now();
+    let out = match part.to_ascii_lowercase() {
+        'a' => solution.part_a(&input),
+        'b' => solution.part_b(&input),
+        _ => return eprintln!("[-] Invalid Part {}", part),
+    };
+
+    let time = start.elapsed().as_nanos();
+    println!("[*] Out: {} (took {})", out, format_time(time));
+}
+
+fn load(day: u8) -> Result<String, Box<dyn std::error::Error>> {
+    let token = std::env::var("TOKEN").expect("TOKEN is not set");
+
+    Ok(
+        ureq::get(format!("https://adventofcode.com/2024/day/{day}/input").as_str())
+            .set("Cookie", format!("session={token}").as_str())
+            .call()?
+            .into_string()?
+            .trim()
+            .replace('\r', ""),
+    )
+}
+
+fn format_time(nanos: u128) -> String {
+    const TIME_UNITS: &[&str] = &["ns", "μs", "ms", "s"];
+
+    let mut time = nanos;
+    for i in TIME_UNITS {
+        if time < 1000 {
+            return format!("{}{}", time, i);
+        }
+        time /= 1000;
+    }
+
+    format!("{}{}", time, TIME_UNITS.last().unwrap())
+}