1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255

#![forbid(unsafe_code)]
/*!
This crates provides solutions for Advent of Code problems.
*/
#![crate_name = "advent_of_code"]

#[cfg(feature = "visualization")]
pub mod painter;
mod year2017;
mod year2018;
mod year2019;

#[cfg(feature = "visualization")]
use painter::MockPainter;
#[cfg(feature = "visualization")]
use painter::Painter;

#[derive(Copy, Clone)]
enum Part {
    One,
    Two,
}

pub struct Input {
    part: Part,
    text: String,
    #[cfg(feature = "visualization")]
    painter: Box<dyn Painter>,
}

impl Input {
    const fn is_part_one(&self) -> bool {
        matches!(self.part, Part::One)
    }

    pub fn part_one(text: &str) -> Self {
        Self {
            part: Part::One,
            text: text.to_string(),
            #[cfg(feature = "visualization")]
            painter: Box::new(MockPainter {}),
        }
    }

    pub fn part_two(text: &str) -> Self {
        Self {
            part: Part::Two,
            text: text.to_string(),
            #[cfg(feature = "visualization")]
            painter: Box::new(MockPainter {}),
        }
    }
}

fn to_stringer<T: ToString>(
    function: fn(&str) -> Result<T, String>,
    input: &str,
) -> Result<String, String> {
    function(input).map(|value| value.to_string())
}

fn to_stringer_input<T: ToString>(
    function: fn(&mut Input) -> Result<T, String>,
    input: &mut Input,
) -> Result<String, String> {
    function(input).map(|value| value.to_string())
}

/// Returns the solution for the specified given problem and input.
///
/// # Arguments
///
/// * `year` - The year of the problem, as in 2018 or 2019.
/// * `day` - The day of the problem - from 1 to 25.
/// * `part` - The part of the problem - either 1 or 2.
/// * `input` - The input to the problem.
///
/// # Examples
/// ```
/// use advent_of_code::solve;
/// let solution = solve(2019, 1, 1, "14");
/// assert_eq!(solution, Ok("2".to_string()));
/// ```
pub fn solve(
    year: u16,
    day: u8,
    part: u8,
    input_string: &str,
    #[cfg(feature = "visualization")] painter: Box<dyn Painter>,
) -> Result<String, String> {
    if input_string.is_empty() {
        return Err("Empty input".to_string());
    }

    let mut input = Input {
        // FIXME: Validate parts.
        part: if part == 1 { Part::One } else { Part::Two },
        text: input_string.to_string(),
        #[cfg(feature = "visualization")]
        painter,
    };

    match (year, day, part) {
        (2017, 1, 1) => to_stringer(year2017::day01::part1, input_string),
        (2017, 1, 2) => to_stringer(year2017::day01::part2, input_string),
        (2017, 2, 1) => to_stringer(year2017::day02::part1, input_string),
        (2017, 2, 2) => to_stringer(year2017::day02::part2, input_string),
        (2017, 3, 1) => to_stringer(year2017::day03::part1, input_string),
        (2017, 3, 2) => to_stringer(year2017::day03::part2, input_string),
        (2017, 4, 1) => to_stringer(year2017::day04::part1, input_string),
        (2017, 4, 2) => to_stringer(year2017::day04::part2, input_string),
        (2017, 5, 1) => to_stringer(year2017::day05::part1, input_string),
        (2017, 5, 2) => to_stringer(year2017::day05::part2, input_string),
        (2017, 6, 1) => to_stringer(year2017::day06::part1, input_string),
        (2017, 6, 2) => to_stringer(year2017::day06::part2, input_string),
        (2017, 7, 1) => to_stringer(year2017::day07::part1, input_string),
        (2017, 7, 2) => to_stringer(year2017::day07::part2, input_string),
        (2017, 8, 1) => to_stringer(year2017::day08::part1, input_string),
        (2017, 8, 2) => to_stringer(year2017::day08::part2, input_string),
        (2017, 9, 1) => to_stringer(year2017::day09::part1, input_string),
        (2017, 9, 2) => to_stringer(year2017::day09::part2, input_string),
        (2017, 10, 1) => to_stringer(year2017::day10::part1, input_string),
        (2017, 10, 2) => to_stringer(year2017::day10::part2, input_string),
        (2017, 11, 1) => to_stringer(year2017::day11::part1, input_string),
        (2017, 11, 2) => to_stringer(year2017::day11::part2, input_string),
        (2017, 12, 1) => to_stringer(year2017::day12::part1, input_string),
        (2017, 12, 2) => to_stringer(year2017::day12::part2, input_string),
        (2017, 13, 1) => to_stringer(year2017::day13::part1, input_string),
        (2017, 13, 2) => to_stringer(year2017::day13::part2, input_string),
        (2017, 14, _) => to_stringer_input(year2017::day14::solve, &mut input),
        (2018, 1, 1) => to_stringer(year2018::day01::part1, input_string),
        (2018, 1, 2) => to_stringer(year2018::day01::part2, input_string),
        (2018, 2, 1) => to_stringer(year2018::day02::part1, input_string),
        (2018, 2, 2) => to_stringer(year2018::day02::part2, input_string),
        (2018, 3, 1) => to_stringer(year2018::day03::part1, input_string),
        (2018, 3, 2) => to_stringer(year2018::day03::part2, input_string),
        (2018, 4, 1) => to_stringer(year2018::day04::part1, input_string),
        (2018, 4, 2) => to_stringer(year2018::day04::part2, input_string),
        (2018, 5, 1) => to_stringer(year2018::day05::part1, input_string),
        (2018, 5, 2) => to_stringer(year2018::day05::part2, input_string),
        (2018, 6, 1) => to_stringer(year2018::day06::part1, input_string),
        (2018, 6, 2) => to_stringer(year2018::day06::part2, input_string),
        (2018, 7, 1) => to_stringer(year2018::day07::part1, input_string),
        (2018, 7, 2) => to_stringer(year2018::day07::part2, input_string),
        (2018, 8, 1) => to_stringer(year2018::day08::part1, input_string),
        (2018, 8, 2) => to_stringer(year2018::day08::part2, input_string),
        (2018, 9, 1) => to_stringer(year2018::day09::part1, input_string),
        (2018, 9, 2) => to_stringer(year2018::day09::part2, input_string),
        (2018, 10, 1) => to_stringer(year2018::day10::part1, input_string),
        (2018, 10, 2) => to_stringer(year2018::day10::part2, input_string),
        (2018, 11, 1) => to_stringer(year2018::day11::part1, input_string),
        (2018, 11, 2) => to_stringer(year2018::day11::part2, input_string),
        (2018, 12, 1) => to_stringer(year2018::day12::part1, input_string),
        (2018, 12, 2) => to_stringer(year2018::day12::part2, input_string),
        (2018, 13, 1) => to_stringer(year2018::day13::part1, input_string),
        (2018, 13, 2) => to_stringer(year2018::day13::part2, input_string),
        (2018, 14, 1) => to_stringer(year2018::day14::part1, input_string),
        (2018, 14, 2) => to_stringer(year2018::day14::part2, input_string),
        (2018, 15, 1) => to_stringer(year2018::day15::part1, input_string),
        (2018, 15, 2) => to_stringer(year2018::day15::part2, input_string),
        (2018, 16, 1) => to_stringer(year2018::day16::part1, input_string),
        (2018, 16, 2) => to_stringer(year2018::day16::part2, input_string),
        (2018, 17, 1) => to_stringer(year2018::day17::part1, input_string),
        (2018, 17, 2) => to_stringer(year2018::day17::part2, input_string),
        (2018, 18, 1) => to_stringer(year2018::day18::part1, input_string),
        (2018, 18, 2) => to_stringer(year2018::day18::part2, input_string),
        (2018, 19, 1) => to_stringer(year2018::day19::part1, input_string),
        (2018, 19, 2) => to_stringer(year2018::day19::part2, input_string),
        (2018, 20, 1) => to_stringer(year2018::day20::part1, input_string),
        (2018, 20, 2) => to_stringer(year2018::day20::part2, input_string),
        (2018, 21, 1) => to_stringer(year2018::day21::part1, input_string),
        (2018, 21, 2) => to_stringer(year2018::day21::part2, input_string),
        (2018, 22, 1) => to_stringer(year2018::day22::part1, input_string),
        (2018, 22, 2) => to_stringer(year2018::day22::part2, input_string),
        (2018, 23, 1) => to_stringer(year2018::day23::part1, input_string),
        (2018, 23, 2) => to_stringer(year2018::day23::part2, input_string),
        (2018, 24, 1) => to_stringer(year2018::day24::part1, input_string),
        (2018, 24, 2) => to_stringer(year2018::day24::part2, input_string),
        (2018, 25, 1) => to_stringer(year2018::day25::part1, input_string),
        (2018, 25, 2) => to_stringer(year2018::day25::part2, input_string),
        (2019, 1, 1) => to_stringer(year2019::day01::part1, input_string),
        (2019, 1, 2) => to_stringer(year2019::day01::part2, input_string),
        (2019, 2, 1) => to_stringer(year2019::day02::part1, input_string),
        (2019, 2, 2) => to_stringer(year2019::day02::part2, input_string),
        (2019, 3, 1) => to_stringer(year2019::day03::part1, input_string),
        (2019, 3, 2) => to_stringer(year2019::day03::part2, input_string),
        (2019, 4, 1) => to_stringer(year2019::day04::part1, input_string),
        (2019, 4, 2) => to_stringer(year2019::day04::part2, input_string),
        (2019, 5, 1) => to_stringer(year2019::day05::part1, input_string),
        (2019, 5, 2) => to_stringer(year2019::day05::part2, input_string),
        (2019, 6, 1) => to_stringer(year2019::day06::part1, input_string),
        (2019, 6, 2) => to_stringer(year2019::day06::part2, input_string),
        (2019, 7, 1) => to_stringer(year2019::day07::part1, input_string),
        (2019, 7, 2) => to_stringer(year2019::day07::part2, input_string),
        (2019, 8, 1) => to_stringer(year2019::day08::part1, input_string),
        (2019, 8, 2) => to_stringer(year2019::day08::part2, input_string),
        (2019, 9, 1) => to_stringer(year2019::day09::part1, input_string),
        (2019, 9, 2) => to_stringer(year2019::day09::part2, input_string),
        (2019, 10, 1) => to_stringer(year2019::day10::part1, input_string),
        (2019, 10, 2) => to_stringer(year2019::day10::part2, input_string),
        (2019, 11, 1) => to_stringer(year2019::day11::part1, input_string),
        (2019, 11, 2) => to_stringer(year2019::day11::part2, input_string),
        (2019, 12, 1) => to_stringer(year2019::day12::part1, input_string),
        (2019, 12, 2) => to_stringer(year2019::day12::part2, input_string),
        (2019, 13, _) => to_stringer_input(year2019::day13::solve, &mut input),
        (2019, 14, 1) => to_stringer(year2019::day14::part1, input_string),
        (2019, 14, 2) => to_stringer(year2019::day14::part2, input_string),
        (2019, 15, 1) => to_stringer(year2019::day15::part1, input_string),
        (2019, 15, 2) => to_stringer(year2019::day15::part2, input_string),
        (2019, 16, 1) => to_stringer(year2019::day16::part1, input_string),
        (2019, 16, 2) => to_stringer(year2019::day16::part2, input_string),
        (2019, 17, 1) => to_stringer(year2019::day17::part1, input_string),
        (2019, 17, 2) => to_stringer(year2019::day17::part2, input_string),
        (2019, 18, _) => to_stringer_input(year2019::day18::solve, &mut input),
        (2019, 19, 1) => to_stringer(year2019::day19::part1, input_string),
        (2019, 19, 2) => to_stringer(year2019::day19::part2, input_string),
        (2019, 20, 1) => to_stringer(year2019::day20::part1, input_string),
        (2019, 20, 2) => to_stringer(year2019::day20::part2, input_string),
        (2019, 21, 1) => to_stringer(year2019::day21::part1, input_string),
        (2019, 21, 2) => to_stringer(year2019::day21::part2, input_string),
        (2019, 22, 1) => to_stringer(year2019::day22::part1, input_string),
        (2019, 22, 2) => to_stringer(year2019::day22::part2, input_string),
        (2019, 23, 1) => to_stringer(year2019::day23::part1, input_string),
        (2019, 23, 2) => to_stringer(year2019::day23::part2, input_string),
        (2019, 24, 1) => to_stringer(year2019::day24::part1, input_string),
        (2019, 24, 2) => to_stringer(year2019::day24::part2, input_string),
        (2019, 25, 1) => to_stringer(year2019::day25::part1, input_string),
        (2019, 25, 2) => to_stringer(year2019::day25::part2, input_string),
        _ => Err(format!(
            "Unsupported year={}, day={}, part={}",
            year, day, part
        )),
    }
}

/// A version of [solve](fn.solve.html) that takes strings as arguments and parses them to the required types.
pub fn solve_raw(
    year_string: &str,
    day_string: &str,
    part_string: &str,
    input: &str,
    #[cfg(feature = "visualization")] painter: Box<dyn Painter>,
) -> Result<String, String> {
    let year = year_string.parse::<u16>().map_err(|_| "Invalid year")?;
    let day = day_string.parse::<u8>().map_err(|_| "Invalid day")?;
    let part = part_string.parse::<u8>().map_err(|_| "Invalid part")?;
    solve(
        year,
        day,
        part,
        input,
        #[cfg(feature = "visualization")]
        painter,
    )
}