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path: root/server/src/state.rs
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/*
    Hurry Curry! - a game about cooking
    Copyright (C) 2025 Hurry Curry! Contributors

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, version 3 of the License only.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/
use crate::{message::TrError, server::Server, tre, trm, ConnectionID};
use anyhow::Result;
use hurrycurry_protocol::{Message, PacketC, PacketS, PlayerID};
use log::{debug, info, trace};

impl Server {
    pub fn tick_outer(&mut self, dt: f32) -> anyhow::Result<()> {
        if self.start_pause_timer > 0. {
            self.start_pause_timer -= dt
        }
        let should_pause = self.start_pause_timer > 0. || self.connections.iter().all(|c| c.1 .1);
        if should_pause != self.paused {
            info!("Game paused: {should_pause}");
            self.paused = should_pause;
            for p in self.game.players.keys() {
                self.packet_out
                    .push_back(PacketC::Pause { state: self.paused });
                self.packet_out.push_back(PacketC::ServerHint {
                    position: None,
                    message: if self.paused {
                        Some(trm!("s.state.paused"))
                    } else {
                        None
                    },
                    player: *p,
                });
            }
        }
        if !self.paused {
            let r = self.tick(dt);
            if let Some((name, timer)) = r {
                self.scoreboard.save()?;
                self.load(self.index.generate_with_book(&name)?, timer);
            }
        }
        while let Some(p) = self.packet_out.pop_front() {
            if matches!(p, PacketC::UpdateMap { .. } | PacketC::Movement { .. }) {
                trace!("-> {p:?}");
            } else {
                debug!("-> {p:?}");
            }
            self.tx.send(p).unwrap();
        }
        Ok(())
    }
    pub async fn packet_in_outer(
        &mut self,
        conn: ConnectionID,
        packet: PacketS,
    ) -> Result<Vec<PacketC>, TrError> {
        if let Some(p) = get_packet_player(&packet) {
            if !self.connections.entry(conn).or_default().0.contains(&p) {
                return Err(tre!("s.error.packet_sender_invalid"));
            }
        }
        let mut replies = Vec::new();
        match &packet {
            PacketS::Communicate {
                message: Some(Message::Text(text)),
                timeout: None,
                player,
                ..
            } if let Some(command) = text.strip_prefix("/") => {
                match self.handle_command_parse(*player, command) {
                    Ok(packets) => return Ok(packets),
                    Err(e) => {
                        return Ok(vec![PacketC::ServerMessage {
                            message: e.into(),
                            error: true,
                        }]);
                    }
                }
            }
            PacketS::Idle { paused } => self.connections.entry(conn).or_default().1 = *paused,
            PacketS::Leave { player } => {
                self.connections.entry(conn).or_default().0.remove(player);
            }
            PacketS::Join { .. } => {
                if self.connections.entry(conn).or_default().0.len() > 8 {
                    return Err(tre!("s.error.conn_too_many_players"));
                }
            }
            _ => (),
        }
        self.packet_in(packet, &mut replies)?;

        for p in &replies {
            if let PacketC::Joined { id } = p {
                self.connections.entry(conn).or_default().0.insert(*id);
            }
        }

        if self.count_chefs() == 0 && !self.game.lobby {
            self.tx
                .send(PacketC::ServerMessage {
                    message: trm!("s.state.abort_no_players"),
                    error: false,
                })
                .ok();
            self.load(
                self.index
                    .generate_with_book("lobby")
                    .map_err(|m| tre!("s.error.map_load", s = format!("{m}")))?,
                None,
            );
        }
        Ok(replies)
    }

    pub async fn disconnect(&mut self, conn: ConnectionID) {
        if let Some((players, _)) = self.connections.get(&conn) {
            for player in players.clone() {
                let _ = self.packet_in_outer(conn, PacketS::Leave { player }).await;
            }
        }
        self.connections.remove(&conn);
    }
}

fn get_packet_player(packet: &PacketS) -> Option<PlayerID> {
    match packet {
        PacketS::Join { .. } => None,
        PacketS::Idle { .. } => None,
        PacketS::Leave { player } => Some(*player),
        PacketS::Movement { player, .. } => Some(*player),
        PacketS::Interact { player, .. } => Some(*player),
        PacketS::Communicate { player, .. } => Some(*player),
        PacketS::ReplaceHand { player, .. } => Some(*player),
        PacketS::Effect { player, .. } => Some(*player),
        PacketS::ApplyScore(_) => None,
        PacketS::ReplayTick { .. } => None,
    }
}