Use console for screen clearning and immediate single-char input

Cargo.lock

@@ -12,6 +12,7 @@ checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
 name = "blackjack"
 version = "0.1.0"
 dependencies = [
+ "console",
  "itertools",
  "rand",
 ]
@@ -22,12 +23,31 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9555578bc9e57714c812a1f84e4fc5b4d21fcb063490c624de019f7464c91268"
 
+[[package]]
+name = "console"
+version = "0.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e09ced7ebbccb63b4c65413d821f2e00ce54c5ca4514ddc6b3c892fdbcbc69d"
+dependencies = [
+ "encode_unicode",
+ "libc",
+ "once_cell",
+ "unicode-width",
+ "windows-sys",
+]
+
 [[package]]
 name = "either"
 version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
+[[package]]
+name = "encode_unicode"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34aa73646ffb006b8f5147f3dc182bd4bcb190227ce861fc4a4844bf8e3cb2c0"
+
 [[package]]
 name = "getrandom"
 version = "0.3.3"
@@ -55,6 +75,12 @@ version = "0.2.174"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
+[[package]]
+name = "once_cell"
+version = "1.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -134,6 +160,12 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
 
+[[package]]
+name = "unicode-width"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a1a07cc7db3810833284e8d372ccdc6da29741639ecc70c9ec107df0fa6154c"
+
 [[package]]
 name = "wasi"
 version = "0.14.2+wasi-0.2.4"
@@ -143,6 +175,79 @@ dependencies = [
  "wit-bindgen-rt",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.60.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.53.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c66f69fcc9ce11da9966ddb31a40968cad001c5bedeb5c2b82ede4253ab48aef"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.53.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
+
 [[package]]
 name = "wit-bindgen-rt"
 version = "0.39.0"

Cargo.toml

@@ -4,5 +4,6 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+console = "0.16.0"
 itertools = "0.14.0"
 rand = "0.9.1"

src/main.rs

@@ -1,6 +1,7 @@
 use blackjack::card::Card;
 use blackjack::game::{Game, PlayResult, PlayerChoice};
 use blackjack::hand::Hand;
+use console::Term;
 use std::env;
 use std::fs;
 use std::io;
@@ -18,6 +19,7 @@ fn interactive_play() {
     // TODO: Persist bank between plays
     // TODO: Make a way to reset bank
     //
+    let term = Term::stdout();
     let mut bank: u32 = match load_bank() {
         Some(b) => b,
         None => 1_000,
@@ -35,7 +37,7 @@ fn interactive_play() {
             if last_bet.is_some() {
                 print!("Your bet [{}]? ", last_bet.unwrap());
                 io::stdout().flush().unwrap();
-                let input = read_input();
+                let input = term.read_line().unwrap();
                 if input == "" {
                     bet = last_bet.unwrap();
                 } else {
@@ -47,7 +49,7 @@ fn interactive_play() {
             } else {
                 print!("Your bet? ");
                 io::stdout().flush().unwrap();
-                match read_input().parse() {
+                match term.read_line().unwrap().parse() {
                     Ok(b) => bet = b,
                     Err(_) => continue,
                 }
@@ -65,6 +67,8 @@ fn interactive_play() {
         let result = game.play(&mut bank, bet, interactive_decision);
         let dealer_hand = Hand::from(result.dealer_cards);
         let player_hand = Hand::from(result.player_cards);
+
+        term.clear_screen().unwrap();
         println!("Dealer's hand: {} = {}", dealer_hand, dealer_hand.value());
         println!("Your hand: {} = {}", player_hand, player_hand.value());
 
@@ -90,7 +94,10 @@ fn interactive_play() {
 }
 
 fn interactive_decision(hand: &Hand, dealer_showing: &Card) -> PlayerChoice {
-    println!("\nDealer showing: {dealer_showing}");
+    let term = Term::stdout();
+    term.clear_screen().unwrap();
+
+    println!("Dealer showing: {dealer_showing}");
     println!("Your hand: {hand}\n");
 
     if hand.value() == 21 {
@@ -108,12 +115,13 @@ fn interactive_decision(hand: &Hand, dealer_showing: &Card) -> PlayerChoice {
         msg += "? ";
         io::stdout().write_all(msg.as_bytes()).unwrap();
         io::stdout().flush().unwrap();
-        choice = match read_input().to_lowercase().as_ref() {
+        choice = match term.read_char().unwrap() {
-            "h" => PlayerChoice::Hit,
+            'h' => PlayerChoice::Hit,
-            "s" => PlayerChoice::Stand,
+            's' => PlayerChoice::Stand,
-            "d" if can_dd => PlayerChoice::DoubleDown,
+            'd' if can_dd => PlayerChoice::DoubleDown,
             _ => continue,
         };
+        println!("\n");
         break;
     }
     choice
@@ -202,12 +210,6 @@ fn old_man() {
     println!("Profit/Loss: ${pl}");
 }
 
-fn read_input() -> String {
-    let mut buf = String::new();
-    io::stdin().read_line(&mut buf).unwrap();
-    buf.trim().to_owned()
-}
-
 fn data_dir() -> PathBuf {
     env::home_dir().unwrap().join(".local/share/blackjack")
 }