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use rand::prelude::SliceRandom;
use rand::Rng;
use std::fmt;
use strum::IntoEnumIterator;
use strum_macros::EnumIter;
#[derive(PartialOrd, Ord, PartialEq, Eq, Clone, Copy, EnumIter)]
pub enum Suit {
Club,
Diamond,
Heart,
Spade,
}
#[derive(PartialOrd, Ord, PartialEq, Eq, Clone, Copy, EnumIter)]
pub enum Rank {
Two = 2,
Three,
Four,
Five,
Six,
Seven,
Eight,
Nine,
Ten,
Jack,
Queen,
King,
Ace,
}
impl fmt::Display for Suit {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
f.write_str(match self {
Suit::Club => "♣",
Suit::Diamond => "♢",
Suit::Heart => "♡",
Suit::Spade => "♠",
})
}
}
#[derive(Debug, PartialEq, Eq)]
pub enum ParseError {
InvalidSuit(String),
InvalidRank(String),
MissingParts(String),
}
impl std::str::FromStr for Suit {
type Err = ParseError;
fn from_str(s: &str) -> std::result::Result<Self, ParseError> {
match s.trim() {
"♣" => Ok(Suit::Club),
"C" => Ok(Suit::Club),
"♢" => Ok(Suit::Diamond),
"♦" => Ok(Suit::Diamond),
"D" => Ok(Suit::Diamond),
"♡" => Ok(Suit::Heart),
"♥" => Ok(Suit::Heart),
"H" => Ok(Suit::Heart),
"♠" => Ok(Suit::Spade),
"S" => Ok(Suit::Spade),
_ => Err(ParseError::InvalidSuit(s.to_string())),
}
}
}
impl fmt::Debug for Suit {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
write!(f, "{}", self)
}
}
impl fmt::Display for Rank {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
f.write_str(match self {
Rank::Ace => "A",
Rank::King => "K",
Rank::Queen => "Q",
Rank::Jack => "J",
Rank::Ten => "10",
Rank::Nine => "9",
Rank::Eight => "8",
Rank::Seven => "7",
Rank::Six => "6",
Rank::Five => "5",
Rank::Four => "4",
Rank::Three => "3",
Rank::Two => "2",
})
}
}
impl fmt::Debug for Rank {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
write!(f, "{}", self)
}
}
impl std::str::FromStr for Rank {
type Err = ParseError;
fn from_str(s: &str) -> std::result::Result<Self, ParseError> {
match s.trim().to_ascii_uppercase().as_str() {
"A" => Ok(Rank::Ace),
"K" => Ok(Rank::King),
"Q" => Ok(Rank::Queen),
"J" => Ok(Rank::Jack),
"10" => Ok(Rank::Ten),
"T" => Ok(Rank::Ten),
"9" => Ok(Rank::Nine),
"8" => Ok(Rank::Eight),
"7" => Ok(Rank::Seven),
"6" => Ok(Rank::Six),
"5" => Ok(Rank::Five),
"4" => Ok(Rank::Four),
"3" => Ok(Rank::Three),
"2" => Ok(Rank::Two),
_ => Err(ParseError::InvalidRank(s.to_string())),
}
}
}
#[derive(PartialEq, Eq, Clone, Copy)]
pub struct Card(pub Suit, pub Rank);
impl fmt::Display for Card {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
let Card(suit, rank) = self;
write!(f, "{}{}", suit, rank)
}
}
impl fmt::Debug for Card {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
write!(f, "{}", self)
}
}
impl std::str::FromStr for Card {
type Err = ParseError;
fn from_str(s: &str) -> std::result::Result<Self, ParseError> {
let stripped = s.replace(" ", "");
let mut chars = stripped.chars();
let suit = chars
.next()
.ok_or(ParseError::MissingParts(s.to_string()))?
.to_string()
.parse()?;
let rank = chars.collect::<String>().parse()?;
Ok(Card(suit, rank))
}
}
fn make_deck() -> Vec<Card> {
let mut result = vec![];
for suit in Suit::iter() {
for rank in Rank::iter() {
result.push(Card(suit, rank));
}
}
result
}
#[cfg(test)]
mod tests {
use super::*;
use log::info;
#[test]
fn string_conversion() {
crate::tests::test_setup();
info!("deck: {:?}", make_deck());
assert_eq!(
make_deck(),
make_deck()
.iter()
.map(|card| format!("{}", card).parse().unwrap())
.collect::<Vec<Card>>(),
);
}
}
pub fn shuffle_deck<R>(rng: &mut R) -> (Vec<Card>, Vec<Card>, Vec<Card>, Vec<Card>)
where
R: Rng,
{
let mut deck = make_deck();
deck.shuffle(rng);
let mut deck = deck.iter();
let n = deck.by_ref().take(13).cloned().collect();
let w = deck.by_ref().take(13).cloned().collect();
let s = deck.by_ref().take(13).cloned().collect();
let e = deck.by_ref().take(13).cloned().collect();
(n, w, s, e)
}
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