Adds Days 4 and 5.1

Cargo.lock

@@ -8,6 +8,7 @@ version = "0.1.0"
 dependencies = [
  "darling",
  "quote",
+ "regex",
  "syn",
 ]
 

advent_derive/Cargo.toml

@@ -10,4 +10,4 @@ proc-macro = true
 syn = "2.0"
 quote = "1.0"
 darling = "0.20"
-
+regex = "1.11"

advent_derive/src/lib.rs

@@ -3,7 +3,8 @@ extern crate proc_macro;
 
 use proc_macro::{TokenStream, TokenTree};
 use quote::quote;
-use syn::{parse_macro_input, parse_quote, Expr, ItemStruct};
+use regex::Regex;
+use syn::{parse_macro_input, Expr, Ident, ItemStruct};
 
 #[proc_macro_attribute]
 pub fn advent_day(attrs: TokenStream, item: TokenStream, ) -> TokenStream {
@@ -18,22 +19,50 @@ pub fn advent_day(attrs: TokenStream, item: TokenStream, ) -> TokenStream {
         }
     }
 
-    let call1 = format!("{}::new()", parts[0]);
+    let call1 = format!("{}::new()", &parts[0]);
-    let call2 = format!("{}::new()", parts[1]);
+    let call2 = format!("{}::new()", &parts[1]);
-    let part1: Expr = parse_quote!(#call1);
+    let part1: Expr = syn::parse_str(&call1.as_str()).unwrap();
-    let part2: Expr = parse_quote!(#call2);
+    let part2: Expr = syn::parse_str(&call2.as_str()).unwrap();
-    
+
-    println!("{:?} {:?}", part1, part2);
     
+    let ident_part1: Ident = syn::parse_str(&parts[0].as_str()).unwrap();
+    let ident_part2: Ident = syn::parse_str(&parts[1].as_str()).unwrap();
+
+    let re = Regex::new(r"(\d+)").unwrap();
+    let hay = input.ident.to_string();
+    let (_, [day_nr]) = re.captures(hay.as_str()).unwrap().extract();
+    let input_str = format!("resources/input{}.txt", day_nr);
+
     let output = quote! {
+
+        impl AdventDayPart1 for #ident_part1 {
+            fn read_input(&mut self) -> Result<(), AdventError> {
+                read_input_part1(self, Path::new(#input_str))
+            }
+
+            fn solve(&mut self) -> Result<u64, AdventError> {
+                solve_part1(self)
+            }
+        }
+
+        impl AdventDayPart2 for #ident_part2 {
+            fn read_input(&mut self) -> Result<(), AdventError> {
+                read_input_part2(self, Path::new(#input_str))
+            }
+
+            fn solve(&mut self) -> Result<u64, AdventError> {
+                solve_part2(self)
+            }
+        }
+
         pub struct #ident {
             part1: Box::<dyn AdventDayPart1>,
             part2: Box::<dyn AdventDayPart2>
         }
 
-        impl Day4 {
+        impl #ident {
             pub fn new() -> Self {
-                Day4 {
+                Self {
                     part1: Box::new(#part1),
                     part2: Box::new(#part2)
                 }

resources/input4.txt

@@ -0,0 +1,140 @@
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src/days/day4.rs

@@ -1,47 +1,176 @@
+use std::path::Path;
+
+use crate::input::read_into_vec;
+
 use super::*;
 
 use advent_derive::advent_day;
+use regex::Regex;
 
 struct Day4Part1 {
-
+    text: Vec<String>
 }
 
 impl Day4Part1 {
     fn new() -> Self {
-        Day4Part1{}
+        Day4Part1{
+            text: vec![]
+        }
     }
 }
 
 struct Day4Part2 {
-
+    text: Vec<String>,
+    grid_size: usize
 }
 
 impl Day4Part2 {
     fn new() -> Self {
-        Day4Part2{}
+        Day4Part2{
+            text: vec![],
+            grid_size: 0usize
+        }
     }
 }
 
-impl AdventDayPart1 for Day4Part1 {
+fn read_input_part1(part1: &mut Day4Part1, path: &Path) -> Result<(), AdventError> {
-    fn read_input(&mut self) -> Result<(),AdventError> {
+    part1.text = read_into_vec(path)?;
-        todo!()
+    Ok(())
-    }
-
-    fn solve(&mut self) -> Result<u64, AdventError> {
-        todo!()
-    }
 }
 
-impl AdventDayPart2 for Day4Part2 {
+fn solve_part1(part1: &mut Day4Part1) -> Result<u64, AdventError> {
-    fn read_input(&mut self) -> Result<(),AdventError> {
+    let lr = part1.text.clone();
-        todo!()
+    let mut ud = vec![];
+    let grid_size = part1.text.len();
+
+    for i in 0usize .. grid_size {
+        ud.push(part1.text.iter().map(|s| {
+            s.chars().nth(i).unwrap()
+        }).collect::<String>());
     }
 
-    fn solve(&mut self) -> Result<u64, AdventError> {
+    let mut lurd = vec![];
-        todo!()
+    for i in 0usize .. grid_size {
+        let mut j = i;
+        
+        lurd.push(part1.text.iter().map(|s| {
+            let c;
+            if j >= grid_size {
+                c = ' ';
+            } else {
+                c = s.chars().nth(j).unwrap();
+            }
+            j += 1;
+            c
+        }).collect::<String>());
     }
+    for i in 1usize .. grid_size {
+        let mut j = i;
+        
+        lurd.push(ud.iter().map(|s| {
+            let c;
+            if j >= grid_size {
+                c = ' ';
+            } else {
+                c = s.chars().nth(j).unwrap();
+            }
+            j += 1;
+            c
+        }).collect::<String>());
+    }
+
+    let mut ruld = vec![];
+    for i in 0usize .. grid_size {
+        let mut j = i;
+        
+        ruld.push(lr.iter().map(|s| {
+            let c;
+            if j >= grid_size {
+                c = ' ';
+            } else {
+                c = s.chars().rev().nth(j).unwrap();
+            }
+            j += 1;
+            c
+        }).collect::<String>());
+    }
+    for i in 1usize .. grid_size {
+        let mut j = 0;
+        ruld.push(lr.iter().skip(i).map(|s| {
+            let c;
+            if j >= grid_size {
+                c = ' ';
+            } else {
+                c = s.chars().rev().nth(j).unwrap();
+            }
+            j += 1;
+            c
+        }).collect::<String>());
+    }
+
+    let xmas_r = Regex::new("XMAS")?;
+    let samx_r = Regex::new("SAMX")?;
+
+    // println!("input:\n{:?}", part1.text);
+    // println!("lr:\n{:?}", lr);
+    // println!("up:\n{:?}", ud);
+    // println!("lurd:\n{:?}", lurd);
+    // println!("ruld:\n{:?}", ruld);
+
+    Ok(
+        lr.iter().chain(ud.iter()).chain(lurd.iter()).chain(ruld.iter()).fold(Ok(0), |sum, s| -> Result<u64, AdventError> {
+            let mut sum = sum?;
+            sum += xmas_r.find_iter(s.as_str()).count() as u64;
+            sum += samx_r.find_iter(s.as_str()).count() as u64;
+            Ok(sum)    
+        })?
+    )
+
 }
 
+fn read_input_part2(part2: &mut Day4Part2, path: &Path) -> Result<(), AdventError> {
+    part2.text = read_into_vec(path)?;
+    part2.grid_size = part2.text.len();
+    Ok(())
+}
+
+fn is_m(part2: &mut Day4Part2, (x, y): (usize, usize)) -> bool {
+    part2.text.iter().skip(y).next().unwrap().chars().nth(x).unwrap() == 'M'
+}
+
+fn is_s(part2: &mut Day4Part2, (x, y): (usize, usize)) -> bool {
+    part2.text.iter().skip(y).next().unwrap().chars().nth(x).unwrap() == 'S'
+}
+
+fn is_xmas(part2: &mut Day4Part2, (x, y): (usize, usize)) -> bool {
+    if x == 0 || x == part2.grid_size - 1 || y == 0 || y == part2.grid_size - 1 {
+        return false;
+    }
+
+    let lr_mas = is_m(part2, (x-1, y-1)) && is_s(part2, (x+1, y+1)) || is_m(part2, (x+1, y+1)) && is_s(part2, (x-1, y-1));
+    let rl_mas = is_m(part2, (x+1, y-1)) && is_s(part2, (x-1, y+1)) || is_m(part2, (x-1, y+1)) && is_s(part2, (x+1, y-1));
+
+    lr_mas && rl_mas
+}
+
+
+fn solve_part2(part2: &mut Day4Part2) -> Result<u64, AdventError> {
+    let text = part2.text.clone();
+    Ok(
+        text.iter().enumerate().fold(0, |acc, (y, s)| {
+            acc + s.chars().enumerate().fold(0, |acc, (x, c)| {
+                if c == 'A' && is_xmas(part2, (x, y)) {
+                    acc + 1
+                } else {
+                    acc
+                }
+            })
+        })
+    )
+}
+
+
+
 #[advent_day(Day4Part1, Day4Part2)]
 struct Day4;
 

src/days/day5.rs

@@ -0,0 +1,93 @@
+use std::path::Path;
+
+use advent_derive::advent_day;
+use itertools::Itertools;
+use regex::Regex;
+
+use crate::input::get_lines;
+
+use super::*;
+
+#[derive(Debug)]
+struct Order {
+    left: u32,
+    right: u32,
+}
+
+struct Day5Part1 {
+    ordering: Vec<Order>,
+    queues: Vec<Vec<u32>>
+}
+
+impl Day5Part1 {
+    fn new() -> Self {
+        Self {
+            ordering: vec![],
+            queues: vec![vec![]]
+        }
+    }
+}
+
+struct Day5Part2 {}
+
+impl Day5Part2 {
+    fn new() -> Self {
+        Self{}
+    }
+}
+
+fn read_input_part1(part1: &mut Day5Part1, path: &Path) -> Result<(), AdventError> {
+    let mut lines = get_lines(path);
+    let order_regex = Regex::new(r"(\d+)\|(\d+)").unwrap();
+    part1.ordering = lines.by_ref().take_while(|s| {
+        s.as_ref().unwrap().trim() != ""
+    }).map(|s| -> Order {
+        let s = s.as_ref().unwrap().as_str();
+        let (_, [l, r]) = order_regex.captures(s).unwrap().extract();
+        Order {
+            left: l.parse::<u32>().unwrap(),
+            right: r.parse::<u32>().unwrap()
+        }
+    }).collect::<Vec<Order>>();
+    part1.queues = lines.map(|s| {
+        let s = s.as_ref().unwrap();
+        let print_item_regex = Regex::new(r"\d+").unwrap();
+        print_item_regex.find_iter(s.as_str()).map(|m| {
+            m.as_str().parse::<u32>().unwrap()
+        }).collect::<Vec<u32>>()
+    }).collect::<Vec<Vec<u32>>>();
+    Ok(())
+}
+
+fn is_correct(part1: &mut Day5Part1, q: Vec<u32>) -> bool {
+    q.iter().enumerate().all(|(index, item)| {
+        part1.ordering.iter().filter(|order| {
+            order.left == *item 
+        }).all(|order| {
+            index < q.iter().find_position(|x| { **x == order.right } ).or(Some((usize::MAX, &0))).unwrap().0
+        })
+    })
+}
+
+fn solve_part1(part1: &mut Day5Part1) -> Result<u64, AdventError> {
+    Ok(part1.queues.clone().into_iter().filter(
+        |q| {
+            is_correct(part1, q.clone())
+        }
+    ).fold(0u64, | acc, item| {
+        acc + item[item.len() / 2] as u64
+    }))
+}
+
+fn read_input_part2(part2: &mut Day5Part2, path: &Path) -> Result<(), AdventError> {
+    Ok(())
+}
+
+
+fn solve_part2(part2: &mut Day5Part2) -> Result<u64, AdventError> {
+    Ok(0)
+}
+
+
+#[advent_day(Day5Part1, Day5Part2)]
+struct Day5;

src/days/mod.rs

@@ -18,4 +18,5 @@ pub trait AdventDay {
 pub mod day1;
 pub mod day2;
 pub mod day3;
-pub mod day4;
+pub mod day4;
+pub mod day5;

src/error/mod.rs

@@ -25,4 +25,10 @@ impl From<TryFromIntError> for AdventError {
     fn from(e: TryFromIntError) -> Self {
         AdventError(e.to_string())
     }
+}
+
+impl From<regex::Error> for AdventError {
+    fn from(e: regex::Error) -> Self {
+        AdventError(e.to_string())
+    }
 }

src/main.rs

@@ -8,6 +8,7 @@ use day1::Day1;
 use day2::Day2;
 use day3::Day3;
 use day4::Day4;
+use day5::Day5;
 
 use crate::error::AdventError;
 use crate::days::*;
@@ -19,6 +20,7 @@ fn main() -> Result<(), AdventError> {
         Box::new(Day2::new()),
         Box::new(Day3::new()),
         Box::new(Day4::new()),
+        Box::new(Day5::new())
     );
 
     if env::args().len() == 1 {