3 files changed, 150 insertions, 0 deletions
diff --git a/src/command.rs b/src/command.rs
new file mode 100644
index 0000000..f95ef98
--- /dev/null
+++ b/src/command.rs
@@ -0,0 +1,27 @@
+use std::fmt;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum Command {
+    Nothing,
+    Accelerate,
+    Decelerate,
+    TurnLeft,
+    TurnRight,
+    UseBoost,
+    UseOil,
+}
+
+impl fmt::Display for Command {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use Command::*;
+        match self {
+            Nothing => write!(f, "NOTHING"),
+            Accelerate => write!(f, "ACCELERATE"),
+            Decelerate => write!(f, "DECELERATE"),
+            TurnLeft => write!(f, "TURN_LEFT"),
+            TurnRight => write!(f, "TURN_RIGHT"),
+            UseBoost => write!(f, "USE_BOOST"),
+            UseOil => write!(f, "USE_OIL"),
+        }
+    }
+}
diff --git a/src/json.rs b/src/json.rs
new file mode 100644
index 0000000..55173bd
--- /dev/null
+++ b/src/json.rs
@@ -0,0 +1,96 @@
+use std::fs::File;
+use std::io::prelude::*;
+
+use anyhow::Result;
+use serde::{Deserialize, Serialize};
+use serde_json;
+use serde_repr::{Deserialize_repr, Serialize_repr};
+
+pub fn read_state_from_json_file(filename: &str) -> Result<State> {
+    let mut file = File::open(filename)?;
+    let mut content = String::new();
+    file.read_to_string(&mut content)?;
+    let state: State = serde_json::from_str(content.as_ref())?;
+
+    Ok(state)
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct State {
+    pub current_round: u32,
+    pub max_rounds: u32,
+    pub player: Player,
+    pub opponent: Opponent,
+    pub world_map: Vec<Vec<WorldMapCell>>,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct Player {
+    id: u32,
+    position: Position,
+    speed: u32,
+    state: PlayerState,
+    powerups: Vec<Powerup>,
+    boosting: bool,
+    boost_counter: u32,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct Opponent {
+    id: u32,
+    position: Position,
+    speed: u32,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct WorldMapCell {
+    position: Position,
+    surface_object: SurfaceObject,
+    occupied_by_player_id: u32,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct Position {
+    x: u32,
+    y: u32,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+pub enum PlayerState {
+    Ready,
+    Nothing,
+    TurningLeft,
+    TurningRight,
+    Accelerating,
+    Decelarating,
+    PickedUpPowerup,
+    UsedBoost,
+    UsedOil,
+    HitMud,
+    Finishing,
+}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
+pub enum Powerup {
+    Boost,
+    Oil,
+}
+
+#[derive(Serialize_repr, Deserialize_repr, Clone, Debug, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+#[repr(u8)]
+pub enum SurfaceObject {
+    Empty = 0,
+    Mud = 1,
+    OilSpill = 2,
+    OilItem = 3,
+    FinishLine = 4,
+    Boost = 5,
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..5d29529
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,27 @@
+use std::io::prelude::*;
+use std::io::stdin;
+
+mod command;
+mod json;
+
+use command::*;
+use json::*;
+
+fn main() {
+    for line in stdin().lock().lines() {
+        let round_number = line.expect("Failed to read line from stdin: {}");
+        let command =
+            match read_state_from_json_file(&format!("./rounds/{}/state.json", round_number)) {
+                Ok(state) => choose_command(state),
+                Err(e) => {
+                    eprintln!("WARN: State file could not be parsed: {}", e);
+                    Command::Nothing
+                }
+            };
+        println!("C;{};{}", round_number, command);
+    }
+}
+
+fn choose_command(state: State) -> Command {
+    Command::Accelerate
+}