commit ac5ff9301b04d3e01e2174a892e11bdb686c2415
Author: Max Bradbury <max@tinybird.info>
Date:   Wed Sep 2 17:50:13 2020 +0100

    wip

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7d11246
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/target
+/Cargo.lock
+/.idea/
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..79ea96c
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "game-engine"
+version = "0.1.0"
+authors = ["Max Bradbury <max@tinybird.info>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+toml = "^0.5.6"
+serde = "^1.0.114"
+serde_derive = "^1.0.114"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..b518327
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,504 @@
+use std::collections::HashMap;
+use std::fs;
+use serde_derive::{Serialize, Deserialize};
+
+#[derive(Debug, Eq, PartialEq, Serialize, Deserialize)]
+pub struct Colour {
+    red: u8,
+    green: u8,
+    blue: u8,
+    alpha: u8,
+}
+
+impl Colour {
+    pub fn from(colours: Vec<u8>) -> Colour {
+        const ZERO: u8 = 0;
+        Colour {
+            red:   *colours.get(0).unwrap_or(&ZERO),
+            green: *colours.get(1).unwrap_or(&ZERO),
+            blue:  *colours.get(2).unwrap_or(&ZERO),
+            alpha: *colours.get(3).unwrap_or(&255),
+        }
+    }
+
+    pub fn to_vec(&self) -> Vec<u8> {
+        vec![self.red, self.green, self.blue, self.alpha]
+    }
+}
+
+#[derive(Debug, Eq, PartialEq, Serialize, Deserialize)]
+pub struct Palette {
+    name: String,
+    colours: Vec<Colour>,
+}
+
+impl Palette {
+    pub fn from(name: &str, toml: &str) -> Self {
+        let intermediate: IntermediatePalette = toml::from_str(toml).unwrap();
+
+        println!("palette name: {}", name);
+
+        for colour in &intermediate.colours {
+            println!("palette colour: {}{}{}", colour[0], colour[1], colour[2]);
+        }
+
+        Palette {
+            name: name.to_string(),
+            colours: intermediate.colours.iter().map(|vec| {
+                Colour::from(vec.clone())
+            }).collect(),
+        }
+    }
+
+    pub fn from_file(path: String) -> Self {
+        // todo get name without extension
+        let name = "blah";
+        let toml = fs::read_to_string(path).unwrap();
+        Self::from(name, &toml)
+    }
+}
+
+/// for toml purposes
+#[derive(Serialize, Deserialize)]
+struct IntermediatePalette {
+    colours: Vec<Vec<u8>>,
+}
+
+/// for toml purposes
+#[derive(Serialize, Deserialize)]
+struct IntermediatePalettes {
+    /// singular so each palette section is named "palette" instead of "palettes" in toml
+    palette: Vec<IntermediatePalette>,
+}
+
+impl IntermediatePalettes {
+    pub fn from_dir() -> Self {
+        Self {
+            palette: vec![]
+        }
+    }
+}
+
+#[derive(Eq, Hash, PartialEq)]
+pub struct Position {
+    x: u8,
+    y: u8,
+}
+
+#[derive(Debug, Eq, PartialEq, Serialize, Deserialize)]
+pub struct Image {
+    name: String,
+    /// colour indexes
+    pixels: Vec<u8>,
+}
+
+impl Image {
+    fn from(intermediate: IntermediateImage) -> Image {
+        Image {
+            name: intermediate.name.to_owned(),
+            pixels: intermediate.pixels.split_whitespace().collect::<String>().chars().map(
+                |char|char as u8
+            ).collect()
+        }
+    }
+}
+
+/// for toml purposes
+#[derive(Debug, Serialize, Deserialize)]
+struct IntermediateImages {
+    /// singular so each image is named "image" instead of "images" in toml
+    image: Vec<IntermediateImage>,
+}
+
+impl IntermediateImages {
+    fn to_images(&self) -> Vec<Image> {
+        self.image.iter().map(|intermediate|
+            Image::from(intermediate.clone())
+        ).collect()
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+struct IntermediateImage {
+    name: String,
+    pixels: String,
+}
+
+impl IntermediateImage {
+    // todo refactor
+    fn from(image: Image) -> IntermediateImage {
+        let mut string = "\n".to_string();
+
+        let sqrt = (image.pixels.len() as f64).sqrt() as usize;
+        for line in image.pixels.chunks(sqrt) {
+            for pixel in line {
+                string.push_str(&format!("{}", *pixel));
+            }
+            string.push('\n');
+        }
+
+        IntermediateImage {
+            name: image.name.to_owned(),
+            /// todo wtf? I guess this crate doesn't handle multiline strings correctly
+            pixels: format!("\"\"{}\"\"", string),
+        }
+    }
+}
+
+// #[derive(Serialize, Deserialize)]
+// pub struct Thing {
+//     name: Option<String>,
+//     /// image name
+//     image: String,
+// }
+//
+
+pub struct Room {
+    name: String,
+    width: u8,
+    height: u8,
+    /// thing names and their positions
+    background: HashMap<Position, String>,
+    foreground: HashMap<Position, String>,
+}
+
+#[derive(Serialize, Deserialize)]
+struct IntermediateRoom {
+    name: String,
+    background: Vec<String>,
+    foreground: Vec<String>,
+}
+
+impl IntermediateRoom {
+    fn from(room: Room) -> IntermediateRoom {
+        fn hashmap_to_vec(hash: HashMap<Position, String>, width: u8, height: u8) -> Vec<String> {
+            let mut thing_ids = Vec::new();
+
+            while thing_ids.len() < (width * height) as usize {
+                thing_ids.push(String::new());
+            }
+
+            thing_ids
+        }
+
+        IntermediateRoom {
+            name: "".to_string(),
+            background: vec![],
+            foreground: vec![]
+        }
+    }
+}
+
+// #[derive(Serialize, Deserialize)]
+// pub enum DataType {
+//     Image,
+//     Integer,
+//     Palette,
+//     Room,
+//     Script,
+//     String,
+//     Thing,
+//     Variable,
+// }
+//
+// /// todo refactor, this is stupid
+// #[derive(Serialize, Deserialize)]
+// pub struct Value {
+//     data_type: DataType,
+//     image: Option<String>,
+//     integer: Option<u64>,
+//     palette: Option<String>,
+//     room: Option<String>,
+//     script: Option<String>,
+//     string: Option<String>,
+//     thing: Option<String>,
+//     variable: Option<String>,
+// }
+//
+// #[derive(Serialize, Deserialize)]
+// pub struct Variable {
+//     name: String,
+//     data_type: DataType,
+//     default: Value,
+// }
+//
+// #[derive(Serialize, Deserialize)]
+// pub struct Parameter {
+//     name: String,
+//     data_type: DataType,
+//     default: Value,
+// }
+//
+// #[derive(Serialize, Deserialize)]
+// pub struct Script {
+//     name: Option<String>,
+//     params: Vec<Parameter>,
+//     script: String,
+// }
+//
+// #[derive(Serialize, Deserialize)]
+// pub struct ScriptInstance {
+//     script: String,
+//     params: HashMap<String, Value>,
+// }
+//
+// #[derive(Serialize, Deserialize)]
+// pub struct ScriptCollection {
+//     scripts: Vec<ScriptInstance>,
+//     /// as well as many named scripts, a trigger can have one anonymous script
+//     anonymous: Option<String>,
+// }
+//
+// #[derive(Serialize, Deserialize)]
+// pub struct Version {
+//     major: u8,
+//     minor: u8,
+// }
+//
+// impl Version {
+//     pub fn default() -> Version {
+//         Version { major: 0, minor: 1 }
+//     }
+// }
+
+#[derive(Debug, Eq, PartialEq, Serialize, Deserialize)]
+pub struct Config {
+    /// used in the window title bar
+    name: Option<String>,
+    width: u8,
+    height: u8,
+    /// animation rate in milliseconds
+    tick: u64,
+    /// if this is not specified, the game will pick the first room it finds
+    starting_room: Option<String>,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct Game {
+    config: Config,
+//     palettes: Vec<Palette>,
+//     variables: Vec<Variable>,
+//     triggers: HashMap<String, ScriptCollection>,
+}
+//
+// #[derive(Debug)]
+// pub struct GameParseError;
+//
+// impl Game {
+//     pub fn from(s: &str) -> Result<Game, GameParseError> {
+//         let result = toml::from_str(s);
+//         if result.is_ok() {
+//             Ok(result.unwrap())
+//         } else {
+//             Err(GameParseError)
+//         }
+//     }
+// }
+//
+
+mod mock {
+    pub(crate) mod image {
+        use crate::Image;
+
+        pub fn bg() -> Image {
+            Image {
+                name: "bg".to_string(),
+                pixels: vec![
+                    0,0,0,0,0,0,0,0,
+                    0,0,0,0,0,0,0,0,
+                    0,0,0,0,0,0,0,0,
+                    0,0,0,0,0,0,0,0,
+                    0,0,0,0,0,0,0,0,
+                    0,0,0,0,0,0,0,0,
+                    0,0,0,0,0,0,0,0,
+                    0,0,0,0,0,0,0,0,
+                ]
+            }
+        }
+
+        pub fn block() -> Image {
+            Image {
+                name: "block".to_string(),
+                pixels: vec![
+                    1,1,1,1,1,1,1,1,
+                    1,0,0,0,0,0,0,1,
+                    1,0,0,0,0,0,0,1,
+                    1,0,0,1,1,0,0,1,
+                    1,0,0,1,1,0,0,1,
+                    1,0,0,0,0,0,0,1,
+                    1,0,0,0,0,0,0,1,
+                    1,1,1,1,1,1,1,1,
+                ]
+            }
+        }
+
+        pub fn avatar() -> Image {
+            Image {
+                name: "avatar".to_string(),
+                pixels: vec![
+                    0,0,0,2,2,0,0,0,
+                    0,0,0,2,2,0,0,0,
+                    0,0,0,2,2,0,0,0,
+                    0,0,2,2,2,2,0,0,
+                    0,2,2,2,2,2,2,0,
+                    2,0,2,2,2,2,0,2,
+                    0,0,2,0,0,2,0,0,
+                    0,0,2,0,0,2,0,0,
+                ]
+            }
+        }
+
+        pub fn cat() -> Image {
+            Image {
+                name: "cat".to_string(),
+                pixels: vec![
+                    0,0,0,0,0,0,0,0,
+                    0,0,0,0,0,0,0,0,
+                    0,2,0,2,0,0,0,2,
+                    0,2,2,2,0,0,0,2,
+                    0,2,2,2,0,0,2,0,
+                    0,2,2,2,2,2,0,0,
+                    0,0,2,2,2,2,0,0,
+                    0,0,2,0,0,2,0,0,
+                ]
+            }
+        }
+    }
+
+    pub(crate) mod palette {
+        use crate::{Palette, Colour, IntermediatePalette};
+
+        pub(crate) fn intermediate() -> IntermediatePalette {
+            IntermediatePalette {
+                colours: vec![
+                    vec![0,0,0,0],
+                    vec![0,81,104,255],
+                    vec![118,159,155,255],
+                    vec![155,155,155,255],
+                ]
+            }
+        }
+
+        pub(crate) fn default() -> Palette {
+            Palette {
+                name: "blueprint".to_string(),
+                colours: vec![
+                    Colour { red: 0, green: 0, blue: 0, alpha: 0 },
+                    Colour { red: 0, green: 81, blue: 104, alpha: 255 },
+                    Colour { red: 118, green: 159, blue: 155, alpha: 255 },
+                    Colour { red: 155, green: 155, blue: 155, alpha: 255 },
+                ],
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use crate::{Game, Config, Palette, Colour, Image, IntermediatePalettes, IntermediateImage, IntermediateImages};
+
+    #[test]
+    fn test_config_from_toml() {
+        let output: Config = toml::from_str(include_str!("test-resources/basic/game.toml")).unwrap();
+        let expected = Config {
+            name: Some("Write your game's title here".to_string()),
+            width: 16,
+            height: 9,
+            tick: 400,
+            starting_room: Some("example room".to_string())
+        };
+        assert_eq!(output, expected);
+    }
+
+    #[test]
+    fn test_config_to_toml() {
+        let output = toml::to_string(&Config {
+            name: Some("Write your game's title here".to_string()),
+            width: 16,
+            height: 9,
+            tick: 400,
+            starting_room: Some("example room".to_string())
+        }).unwrap();
+        let expected = include_str!("test-resources/basic/game.toml");
+        assert_eq!(&output, expected);
+    }
+
+    #[test]
+    fn test_palette_from_toml() {
+        let output = Palette::from(
+            "blueprint",
+            include_str!("test-resources/basic/palettes/blueprint.toml")
+        );
+        let expected = crate::mock::palette::default();
+        assert_eq!(output, expected);
+    }
+
+    #[test]
+    fn test_palette_to_toml() {
+        let intermediate = crate::mock::palette::intermediate();
+        let output = toml::to_string(&intermediate).unwrap();
+        let expected = include_str!("test-resources/basic/palettes/blueprint.toml");
+        assert_eq!(&output, expected);
+    }
+
+    // #[test]
+    // fn test_image_from_toml() {
+    //     let str = include_str!("test-resources/basic/images.toml");
+    //     let output: Image = toml::from_str(str).unwrap();
+    //     let expected = crate::mock::image::avatar();
+    //     assert_eq!(output, expected);
+    // }
+
+    #[test]
+    fn test_colour_from_intermediate() {
+        let output = Colour::from(vec![64, 128, 192, 255]);
+        let expected = Colour { red: 64, green: 128, blue: 192, alpha: 255 };
+        assert_eq!(output, expected);
+    }
+
+    #[test]
+    fn test_colour_to_intermediate() {
+        let output = Colour { red: 64, green: 128, blue: 192, alpha: 255 }.to_vec();
+        let expected = vec![64, 128, 192, 255];
+        assert_eq!(output, expected);
+    }
+
+    // #[test]
+    // fn test_images_from_intermediate() {
+    //     let str = include_str!("test-resources/basic/images.toml");
+    //     let output: Vec<IntermediateImage> = toml::from_str(str).unwrap();
+    //     print!("{}", output.len());
+    // }
+
+    // #[test]
+    // fn test_images_to_toml() {
+    //     let images = IntermediateImages {
+    //         image: vec![
+    //             IntermediateImage::from(crate::mock::image::bg()),
+    //             IntermediateImage::from(crate::mock::image::block()),
+    //             IntermediateImage::from(crate::mock::image::avatar()),
+    //             IntermediateImage::from(crate::mock::image::cat()),
+    //         ]
+    //     };
+    //
+    //     let output = toml::to_string(&images).unwrap();
+    //     let expected = include_str!("test-resources/basic/images.toml");
+    //
+    //     // I think this is failing because one has escaped quotation marks and one has normal ones(??)
+    //     assert_eq!(output, expected);
+    // }
+
+    // #[test]
+    // fn test_images_from_toml() {
+    //     let str = include_str!("test-resources/basic/images.toml");
+    //     let output: IntermediateImages = toml::from_str(str).unwrap();
+    //     let output = output.to_images();
+    //     let expected = vec![
+    //         crate::mock::image::bg(),
+    //         crate::mock::image::block(),
+    //         crate::mock::image::avatar(),
+    //         crate::mock::image::cat(),
+    //     ];
+    //     assert_eq!(output, expected);
+    // }
+}
diff --git a/src/test-resources/basic/basic.toml b/src/test-resources/basic/basic.toml
new file mode 100644
index 0000000..a1fb4ec
--- /dev/null
+++ b/src/test-resources/basic/basic.toml
@@ -0,0 +1,68 @@
+[image]
+name = "bg"
+pixels = [
+    1,1,1,1,1,1,1,1,
+    1,1,1,1,1,1,1,1,
+    1,1,1,1,1,1,1,1,
+    1,1,1,1,1,1,1,1,
+    1,1,1,1,1,1,1,1,
+    1,1,1,1,1,1,1,1,
+    1,1,1,1,1,1,1,1,
+    1,1,1,1,1,1,1,1,
+]
+
+[image]
+name = "block"
+pixels = [    
+    2,2,2,2,2,2,2,2,
+    2,1,1,1,1,1,1,2,
+    2,1,1,1,1,1,1,2,
+    2,1,1,2,2,1,1,2,
+    2,1,1,2,2,1,1,2,
+    2,1,1,1,1,1,1,2,
+    2,1,1,1,1,1,1,2,
+    2,2,2,2,2,2,2,2,
+]
+
+[image]
+name = "avatar"
+pixels = [
+    0,0,0,3,3,0,0,0,
+    0,0,0,3,3,0,0,0,
+    0,0,0,3,3,0,0,0,
+    0,0,3,3,3,3,0,0,
+    0,3,3,3,3,3,3,0,
+    3,0,3,3,3,3,0,3,
+    0,0,3,0,0,3,0,0,
+    0,0,3,0,0,3,0,0,
+]
+
+[image]
+name = "cat"
+pixels = [
+    0,0,0,0,0,0,0,0,
+    0,0,0,0,0,0,0,0,
+    0,3,0,3,0,0,0,3,
+    0,3,3,3,0,0,0,3,
+    0,3,3,3,0,0,3,0,
+    0,3,3,3,3,3,0,0,
+    0,0,3,3,3,3,0,0,
+    0,0,3,0,0,3,0,0,
+]
+
+[thing]
+name = "avatar"
+image = "avatar"
+input = ["movement-wasd", "movement-arrow-keys"]
+
+[thing]
+name = "cat"
+image = "cat"
+bumped = """
+say "I'm a cat"
+"""
+
+[variable]
+name = "a"
+type = "int"
+default = 42
diff --git a/src/test-resources/basic/game.toml b/src/test-resources/basic/game.toml
new file mode 100644
index 0000000..d269e4f
--- /dev/null
+++ b/src/test-resources/basic/game.toml
@@ -0,0 +1,5 @@
+name = "Write your game's title here"
+width = 16
+height = 9
+tick = 400
+starting_room = "example room"
diff --git a/src/test-resources/basic/images/avatar.toml b/src/test-resources/basic/images/avatar.toml
new file mode 100644
index 0000000..7fb0a86
--- /dev/null
+++ b/src/test-resources/basic/images/avatar.toml
@@ -0,0 +1,10 @@
+pixels = """
+00022000
+00022000
+00022000
+00222200
+02222220
+20222202
+00200200
+00200200
+"""
diff --git a/src/test-resources/basic/images/bg.toml b/src/test-resources/basic/images/bg.toml
new file mode 100644
index 0000000..2c87bcd
--- /dev/null
+++ b/src/test-resources/basic/images/bg.toml
@@ -0,0 +1,10 @@
+pixels = """
+00000000
+00000000
+00000000
+00000000
+00000000
+00000000
+00000000
+00000000
+"""
diff --git a/src/test-resources/basic/images/block.toml b/src/test-resources/basic/images/block.toml
new file mode 100644
index 0000000..e75fcbd
--- /dev/null
+++ b/src/test-resources/basic/images/block.toml
@@ -0,0 +1,10 @@
+pixels = """
+11111111
+10000001
+10000001
+10011001
+10011001
+10000001
+10000001
+11111111
+"""
diff --git a/src/test-resources/basic/images/cat.toml b/src/test-resources/basic/images/cat.toml
new file mode 100644
index 0000000..86b80a2
--- /dev/null
+++ b/src/test-resources/basic/images/cat.toml
@@ -0,0 +1,10 @@
+pixels = """
+00000000
+00000000
+02020002
+02220002
+02220020
+02222200
+00222200
+00200200
+"""
diff --git a/src/test-resources/basic/palettes/blueprint.toml b/src/test-resources/basic/palettes/blueprint.toml
new file mode 100644
index 0000000..669d382
--- /dev/null
+++ b/src/test-resources/basic/palettes/blueprint.toml
@@ -0,0 +1 @@
+colours = [[0, 0, 0, 0], [0, 81, 104, 255], [118, 159, 155, 255], [155, 155, 155, 255]]
diff --git a/src/test-resources/basic/rooms/example room.toml b/src/test-resources/basic/rooms/example room.toml
new file mode 100644
index 0000000..544f58f
--- /dev/null
+++ b/src/test-resources/basic/rooms/example room.toml	
@@ -0,0 +1,37 @@
+background = [
+    "bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg",
+    "bg","block","block","block","block","block","block","block","block","block","block","block","block","block","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","block","bg",
+    "bg","block","block","block","block","block","block","block","block","block","block","block","block","block","block","bg",
+    "bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg","bg",
+]
+foreground = [
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","avatar","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","cat","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+    "","","","","","","","","","","","","","","","",
+]
+palette = "blueprint"