1 files changed, 113 insertions, 0 deletions
diff --git a/webapp/src/card.rs b/webapp/src/card.rs
new file mode 100644
index 0000000..071f2d1
--- /dev/null
+++ b/webapp/src/card.rs
@@ -0,0 +1,113 @@
+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 => "♠",
+        })
+    }
+}
+
+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)
+    }
+}
+
+#[derive(PartialEq, Eq, Clone, Copy)]
+pub struct Card(Suit, 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)
+    }
+}
+
+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
+}
+
+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)
+}