commit 0279c63a396c0abceed2380b9a08af4c70d2c2ba
Author: uku <hi@uku.moe>
Date:   Sun Dec 1 13:19:29 2024 +0100

    feat: initial commit

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..1d953f4
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
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diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..68954a9
--- /dev/null
+++ b/.gitignore
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diff --git a/Cargo.lock b/Cargo.lock
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index 0000000..587fbf1
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+
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+checksum = "6c5b1314b079b0930c31e3af543d8ee1757b1951ae1e1565ec704403a7240ca5"
+dependencies = [
+ "serde",
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.7.5"
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+checksum = "2380878cad4ac9aac1e2435f3eb4020e8374b5f13c296cb75b4620ff8e229154"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
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+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.5"
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+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
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+version = "1.8.1"
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+
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+checksum = "aa2b893d79df23bfb12d5461018d408ea19dfafe76c2c7ef6d4eba614f8ff079"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..7c23939
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "advent-of-code-2024"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+dotenvy = "0.15.7"
+ureq = "2.11.0"
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..13c5b60
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,14 @@
+{
+  pkgs ? import <nixpkgs> { },
+}:
+pkgs.mkShell {
+  packages = with pkgs; [
+    rustc
+    cargo
+    clippy
+    rustfmt
+    rust-analyzer
+  ];
+  
+  RUST_SRC_PATH = "${pkgs.rustPlatform.rustLibSrc}";
+}
diff --git a/src/common/answer.rs b/src/common/answer.rs
new file mode 100644
index 0000000..317f2a3
--- /dev/null
+++ b/src/common/answer.rs
@@ -0,0 +1,53 @@
+use std::fmt::{self, Display};
+
+#[derive(Debug, PartialEq)]
+pub enum Answer {
+    String(String),
+    Number(u64),
+    Float(f64),
+    #[allow(unused)]
+    Unimplemented,
+}
+
+impl Display for Answer {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Answer::String(s) => write!(f, "{s}"),
+            Answer::Number(n) => write!(f, "{n}"),
+            Answer::Float(n) => write!(f, "{n}"),
+            Answer::Unimplemented => write!(f, "Unimplemented"),
+        }
+    }
+}
+
+impl From<String> for Answer {
+    fn from(s: String) -> Self {
+        Self::String(s)
+    }
+}
+
+impl From<&str> for Answer {
+    fn from(s: &str) -> Self {
+        Self::String(s.to_string())
+    }
+}
+
+macro_rules! answer_impl {
+    ($answer:ident, $answer_type:ty, { $($type:ty),* }) => {
+        $(impl From<$type> for Answer {
+            fn from(n: $type) -> Self {
+                Self::$answer(n as $answer_type)
+            }
+        })*
+    };
+}
+
+answer_impl!(
+    Number, u64,
+    { u8, u16, u32, u64, usize, i8, i16, i32, i64, isize }
+);
+
+answer_impl!(
+    Float, f64,
+    { f32, f64 }
+);
diff --git a/src/common/mod.rs b/src/common/mod.rs
new file mode 100644
index 0000000..f1d490d
--- /dev/null
+++ b/src/common/mod.rs
@@ -0,0 +1,6 @@
+// heavily inspired by Basicprogrammer10/advent-of-code
+mod answer;
+mod solution;
+
+pub use answer::Answer;
+pub use solution::Solution;
diff --git a/src/common/solution.rs b/src/common/solution.rs
new file mode 100644
index 0000000..c5ca6b5
--- /dev/null
+++ b/src/common/solution.rs
@@ -0,0 +1,7 @@
+use super::Answer;
+
+pub trait Solution {
+    fn name(&self) -> &'static str;
+    fn part_a(&self, input: &str) -> Answer;
+    fn part_b(&self, input: &str) -> Answer;
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..1d7db43
--- /dev/null
+++ b/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())
+}
diff --git a/src/solutions/mod.rs b/src/solutions/mod.rs
new file mode 100644
index 0000000..24ed351
--- /dev/null
+++ b/src/solutions/mod.rs
@@ -0,0 +1,3 @@
+use crate::common::Solution;
+
+pub const SOLUTIONS: &[&dyn Solution] = &[];