1 files changed, 88 insertions, 0 deletions
diff --git a/server/src/game.rs b/server/src/game.rs
new file mode 100644
index 00000000..0d1e8c3b
--- /dev/null
+++ b/server/src/game.rs
@@ -0,0 +1,88 @@
+use crate::protocol::{Item, PacketC, PacketS, ID};
+use anyhow::{anyhow, Result};
+use glam::UVec2;
+use std::collections::{HashMap, VecDeque};
+
+struct ItemData {}
+
+struct TileData {
+    items: Vec<ID>,
+    active: bool,
+}
+
+struct Player {
+    name: String,
+    hand: Option<ID>,
+}
+
+#[derive(Default)]
+pub struct Game {
+    item_id_counter: ID,
+    tiles: HashMap<UVec2, TileData>,
+    items: HashMap<ID, Item>,
+    players: HashMap<ID, Player>,
+    packet_out: VecDeque<PacketC>,
+}
+
+impl Game {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn packet_out(&mut self) -> Option<PacketC> {
+        self.packet_out.pop_front()
+    }
+
+    pub fn packet_in(&mut self, player: ID, packet: PacketS) -> Result<()> {
+        match packet {
+            PacketS::Join { name } => {
+                self.players.insert(
+                    player,
+                    Player {
+                        hand: None,
+                        name: name.clone(),
+                    },
+                );
+                self.packet_out
+                    .push_back(PacketC::AddPlayer { id: player, name });
+            }
+            PacketS::Leave => {
+                let p = self
+                    .players
+                    .remove(&player)
+                    .ok_or(anyhow!("player does not exist"))?;
+                if let Some(_i) = p.hand {
+                    // TODO what now?
+                }
+                self.packet_out
+                    .push_back(PacketC::RemovePlayer { id: player })
+            }
+            PacketS::Position { pos, rot } => {
+                self.packet_out
+                    .push_back(PacketC::Position { player, pos, rot });
+            }
+            PacketS::Interact { pos } => {
+                let tile = self
+                    .tiles
+                    .get_mut(&pos)
+                    .ok_or(anyhow!("interacting with empty tile"))?;
+                let player_data = self
+                    .players
+                    .get_mut(&player)
+                    .ok_or(anyhow!("player does not exist"))?;
+
+                if let Some(item) = player_data.hand.take() {
+                    tile.items.push(item);
+                    self.packet_out.push_back(PacketC::PutItem { item, pos })
+                } else {
+                    if let Some(item) = tile.items.pop() {
+                        player_data.hand = Some(item);
+                        self.packet_out
+                            .push_back(PacketC::TakeItem { item, player })
+                    }
+                }
+            }
+        }
+        Ok(())
+    }
+}