1 files changed, 85 insertions, 0 deletions
diff --git a/planetwars-rules/src/config.rs b/planetwars-rules/src/config.rs
new file mode 100644
index 0000000..57c77eb
--- /dev/null
+++ b/planetwars-rules/src/config.rs
@@ -0,0 +1,85 @@
+use std::fs::File;
+use std::io;
+use std::io::Read;
+use std::path::PathBuf;
+
+use serde_json;
+
+use super::protocol as proto;
+use super::rules::*;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Config {
+    pub map_file: PathBuf,
+    pub max_turns: u64,
+}
+
+impl Config {
+    pub fn create_state(&self, num_players: usize) -> PwState {
+        let planets = self.load_map(num_players);
+        let players = (0..num_players)
+            .map(|player_num| Player {
+                id: player_num + 1,
+                alive: true,
+            })
+            .collect();
+
+        PwState {
+            players: players,
+            planets: planets,
+            expeditions: Vec::new(),
+            expedition_num: 0,
+            turn_num: 0,
+            max_turns: self.max_turns,
+        }
+    }
+
+    fn load_map(&self, num_players: usize) -> Vec<Planet> {
+        let map = self.read_map().expect("[PLANET_WARS] reading map failed");
+
+        return map
+            .planets
+            .into_iter()
+            .enumerate()
+            .map(|(num, planet)| {
+                let mut fleets = Vec::new();
+                let owner = planet.owner.and_then(|owner_num| {
+                    // in the current map format, player numbers start at 1.
+                    // TODO: we might want to change this.
+                    // ignore players that are not in the game
+                    if owner_num > 0 && owner_num <= num_players {
+                        Some(owner_num - 1)
+                    } else {
+                        None
+                    }
+                });
+                if planet.ship_count > 0 {
+                    fleets.push(Fleet {
+                        owner: owner,
+                        ship_count: planet.ship_count,
+                    });
+                }
+                return Planet {
+                    id: num,
+                    name: planet.name,
+                    x: planet.x,
+                    y: planet.y,
+                    fleets: fleets,
+                };
+            })
+            .collect();
+    }
+
+    fn read_map(&self) -> io::Result<Map> {
+        let mut file = File::open(&self.map_file)?;
+        let mut buf = String::new();
+        file.read_to_string(&mut buf)?;
+        let map = serde_json::from_str(&buf)?;
+        return Ok(map);
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Map {
+    pub planets: Vec<proto::Planet>,
+}