diff --git a/.woodpecker/frontend.yml b/.woodpecker/frontend.yml
index dee75af..5ab5caa 100644
--- a/.woodpecker/frontend.yml
+++ b/.woodpecker/frontend.yml
@@ -70,3 +70,4 @@ pipeline:
ignore_message: "[ALL]"
depends_on:
- wasm-o-x-rust
+ - wasm-connect-four-rust
diff --git a/.woodpecker/wasm-connect-four-rust.yml b/.woodpecker/wasm-connect-four-rust.yml
new file mode 100644
index 0000000..e48d869
--- /dev/null
+++ b/.woodpecker/wasm-connect-four-rust.yml
@@ -0,0 +1,47 @@
+pipeline:
+ build:
+ image: git.koval.net/cyclane/game-algorithms/wasm-pack-plugin
+ pull: true
+ settings:
+ actions: build
+ folder: wasm/connect-four-rust
+ target: web
+ scope: game-algorithms
+ when:
+ path:
+ include:
+ - wasm/connect-four-rust/*
+ - .woodpecker/wasm-connect-four-rust.yml
+ ignore_message: "[ALL]"
+ test:
+ image: git.koval.net/cyclane/game-algorithms/wasm-pack-plugin
+ pull: true
+ settings:
+ actions: test
+ folder: wasm/connect-four-rust
+ when:
+ path:
+ include:
+ - wasm/connect-four-rust/*
+ - .woodpecker/wasm-connect-four-rust.yml
+ ignore_message: "[ALL]"
+ publish:
+ image: git.koval.net/cyclane/game-algorithms/wasm-pack-plugin
+ pull: true
+ settings:
+ actions: publish
+ folder: wasm/connect-four-rust
+ scope: game-algorithms
+ username: cyclane
+ token:
+ from_secret: DEPLOY_TOKEN
+ registry: https://git.koval.net/api/packages/cyclane/npm/
+ when:
+ branch: main
+ path:
+ include:
+ - wasm/connect-four-rust/*
+ - .woodpecker/wasm-connect-four-rust.yml
+ ignore_message: "[ALL]"
+depends_on:
+ - tools-wasm-pack-plugin
diff --git a/wasm/connect-four-rust/Cargo.lock b/wasm/connect-four-rust/Cargo.lock
new file mode 100644
index 0000000..e7a0879
--- /dev/null
+++ b/wasm/connect-four-rust/Cargo.lock
@@ -0,0 +1,198 @@
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diff --git a/wasm/connect-four-rust/Cargo.toml b/wasm/connect-four-rust/Cargo.toml
new file mode 100644
index 0000000..9fb0585
--- /dev/null
+++ b/wasm/connect-four-rust/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "connect-four-rust"
+description = "Connect four WASM algorithms"
+repository = "https://git.koval.net/cyclane/game-algorithms/src/branch/main/wasm/connect-four-rust"
+license = "GNU GPLv3"
+readme = "README.md"
+version = "0.0.1"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+wasm-bindgen = "0.2.82"
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.32"
diff --git a/wasm/connect-four-rust/LICENSE b/wasm/connect-four-rust/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/wasm/connect-four-rust/LICENSE
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+ The licenses for most software and other practical works are designed
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+share and change all versions of a program--to make sure it remains free
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+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
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+ Developers that use the GNU GPL protect your rights with two steps:
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diff --git a/wasm/connect-four-rust/README.md b/wasm/connect-four-rust/README.md
new file mode 100644
index 0000000..b65e149
--- /dev/null
+++ b/wasm/connect-four-rust/README.md
@@ -0,0 +1,3 @@
+# Connect Four Rust
+
+This crate contains implementation(s) for connect four algorithm(s) for use on the frontend as WASM.
diff --git a/wasm/connect-four-rust/src/lib.rs b/wasm/connect-four-rust/src/lib.rs
new file mode 100644
index 0000000..55f9c1c
--- /dev/null
+++ b/wasm/connect-four-rust/src/lib.rs
@@ -0,0 +1,192 @@
+use wasm_bindgen::prelude::wasm_bindgen;
+
+#[inline]
+pub fn get_idx(w: usize, x: usize, y: usize) -> usize {
+ y * w + x
+}
+
+#[inline]
+pub fn get_x(w: usize, idx: usize) -> usize {
+ idx % w
+}
+
+#[inline]
+pub fn get_y(w: usize, idx: usize) -> usize {
+ idx / w
+}
+
+#[inline]
+pub fn get_diagonals(w: usize, board: &[u8], reverse: bool) -> Vec> {
+ let h = get_y(w, board.len());
+ (0..w + h - 1).into_iter()
+ .map(|p| board.iter()
+ .enumerate()
+ .filter_map(|(idx, &v)| {
+ let x = get_x(w, idx);
+ let y = get_y(w, idx);
+ if (x + y == p && !reverse) || (w - x - 1 + y == p && reverse) {
+ Some(v)
+ } else { None }
+ }).collect()
+ )
+ .collect()
+}
+
+#[inline]
+pub fn get_rows(w: usize, board: &[u8]) -> Vec> {
+ board.chunks(w)
+ .map(|c| c.to_vec())
+ .collect()
+}
+
+#[inline]
+pub fn get_columns(w: usize, board: &[u8]) -> Vec> {
+ (0..w).into_iter()
+ .map(|target_x| board.iter()
+ .enumerate()
+ .filter_map(|(idx, &v)| {
+ let x = get_x(w, idx);
+ if x == target_x {
+ Some(v)
+ } else { None }
+ }).collect()
+ )
+ .collect()
+}
+
+#[inline]
+pub fn test_chunks(chunks: &[Vec], min: usize) -> Option {
+ chunks.iter()
+ .find_map(|chunk| chunk.windows(min)
+ .find_map(|window| {
+ if window.iter()
+ .all(|&n| n == window[0] && n != 0) {
+ Some(window[0])
+ } else { None }
+ })
+ )
+}
+
+#[wasm_bindgen]
+pub fn find_winner(w: usize, board: &[u8], min: usize) -> u8 {
+ let rows_test = test_chunks(&get_rows(w, board), min);
+ if let Some(winner) = rows_test {
+ return winner;
+ }
+ let cols_test = test_chunks(&get_columns(w, board), min);
+ if let Some(winner) = cols_test {
+ return winner;
+ }
+ let dia1_test = test_chunks(&get_diagonals(w, board, false), min);
+ if let Some(winner) = dia1_test {
+ return winner;
+ }
+ let dia2_test = test_chunks(&get_diagonals(w, board, true), min);
+ if let Some(winner) = dia2_test {
+ return winner;
+ }
+ 0
+}
+
+#[wasm_bindgen]
+pub fn count_empty(board: &[u8]) -> usize {
+ board.iter().filter(|&n| *n == 0).count()
+}
+
+#[wasm_bindgen]
+pub fn get_turn(me: u8, other: u8, first: bool, empty: usize) -> u8 {
+ if empty % 2 == if first { 0 } else { 1 } {
+ me
+ } else {
+ other
+ }
+}
+
+#[wasm_bindgen]
+pub fn mm_get_score(me: u8, other: u8, first: bool, w: usize, board: &[u8], min: usize) -> f64 {
+ mm_sub_get_score(me, other, first, w, &board.to_vec(), min, board.len() as f64 + 1.0, 0.0, 0.0)
+}
+
+#[wasm_bindgen]
+pub fn mm_d_get_score(me: u8, other: u8, first: bool, w: usize, board: &[u8], min: usize) -> f64 {
+ mm_sub_get_score(me, other, first, w, &board.to_vec(), min, board.len() as f64 + 1.0, 0.0, 1.0)
+}
+
+// m = score (without depth) multiplier
+// dm = depth multiplier
+pub fn mm_sub_get_score(me: u8, other: u8, first: bool, w: usize, board: &Vec, min: usize, m: f64, depth: f64, dm: f64) -> f64 {
+ let winner = find_winner(w, board, min);
+ if winner != 0 {
+ return if winner == me { m - depth*dm } else { -m + depth*dm };
+ }
+ let empty = count_empty(board);
+ if empty == 0 {
+ return 0.0;
+ }
+ let turn = get_turn(me, other, first, empty);
+ let mut best = if turn == me { f64::MIN } else { f64::MAX };
+ for (x, col) in get_columns(w, board).into_iter().enumerate() {
+ let r = col.into_iter()
+ .enumerate()
+ .filter_map(|(idx, v)| {
+ if v == 0 {
+ Some(idx)
+ } else { None }
+ })
+ .rev()
+ .next();
+ if let Some(y) = r {
+ let copy = &mut board.clone();
+ copy[get_idx(w, x, y)] = get_turn(me, other, first, empty);
+ let value = mm_sub_get_score(me, other, first, w, copy, min, m, depth + 1.0, dm);
+ best = if turn == me { best.max(value) } else { best.min(value) };
+ }
+ }
+ best
+}
+
+// Algorithms:
+// mm: minimax algorithm
+// mm+d: minmax algorithm with depth
+#[wasm_bindgen]
+pub fn get_score(me: u8, other: u8, first: bool, w: usize, board: &[u8], min: usize, algorithm: &str) -> f64 {
+ match algorithm {
+ "mm" => mm_get_score(me, other, first, w, board, min),
+ "mm+d" => mm_d_get_score(me, other, first, w, board, min),
+ _ => 0.0
+ }
+}
+
+// Algorithms:
+// mm: minimax algorithm
+// mm+d: minmax algorithm with depth
+#[wasm_bindgen]
+pub fn predict(me: u8, other: u8, first: bool, w: usize, board: &[u8], min: usize, algorithm: &str) -> usize {
+ let (mut max_p, mut max_s) = (0, f64::MIN);
+ let empty = count_empty(board);
+ if empty == 0 {
+ return 0;
+ }
+ let vec_board = board.to_vec();
+ for (x, col) in get_columns(w, board).into_iter().enumerate() {
+ let r = col.into_iter()
+ .enumerate()
+ .filter_map(|(idx, v)| {
+ if v == 0 {
+ Some(idx)
+ } else { None }
+ })
+ .rev()
+ .next();
+ if let Some(y) = r {
+ let copy = &mut vec_board.clone();
+ copy[get_idx(w, x, y)] = get_turn(me, other, first, empty);
+ let score = get_score(me, other, first, w, copy, min, algorithm);
+ if score > max_s {
+ (max_p, max_s) = (x, score);
+ }
+ }
+ }
+
+ max_p
+}
diff --git a/wasm/connect-four-rust/tests/web.rs b/wasm/connect-four-rust/tests/web.rs
new file mode 100644
index 0000000..df2b50c
--- /dev/null
+++ b/wasm/connect-four-rust/tests/web.rs
@@ -0,0 +1,5 @@
+extern crate wasm_bindgen_test;
+
+use wasm_bindgen_test::wasm_bindgen_test;
+use connect_four_rust::*;
+