kawari/src/world/connection.rs

use tokio::net::TcpStream;

use crate::{
    common::timestamp_secs,
    packet::{
        CompressionType, ConnectionType, PacketSegment, PacketState, SegmentType, parse_packet,
        send_packet,
    },
};

use super::{
    Zone,
    ipc::{
        ActorSetPos, ClientZoneIpcSegment, InitZone, Position, ServerZoneIpcData,
        ServerZoneIpcSegment, ServerZoneIpcType, UpdateClassInfo, WeatherChange,
    },
};

#[derive(Debug, Default)]
pub struct PlayerData {
    pub actor_id: u32,
    pub content_id: u64,
    pub account_id: u32,
}

/// Represents a single connection between an instance of the client and the world server
pub struct ZoneConnection {
    pub socket: TcpStream,

    pub state: PacketState,
    pub player_data: PlayerData,

    pub zone: Zone,
    pub spawn_index: u8,
}

impl ZoneConnection {
    pub async fn parse_packet(
        &mut self,
        data: &[u8],
    ) -> (Vec<PacketSegment<ClientZoneIpcSegment>>, ConnectionType) {
        parse_packet(data, &mut self.state).await
    }

    pub async fn send_segment(&mut self, segment: PacketSegment<ServerZoneIpcSegment>) {
        send_packet(
            &mut self.socket,
            &mut self.state,
            ConnectionType::Zone,
            CompressionType::Oodle,
            &[segment],
        )
        .await;
    }

    pub async fn set_player_position(&mut self, position: Position) {
        // set pos
        {
            let ipc = ServerZoneIpcSegment {
                op_code: ServerZoneIpcType::ActorSetPos,
                timestamp: timestamp_secs(),
                data: ServerZoneIpcData::ActorSetPos(ActorSetPos {
                    unk: 0x020fa3b8,
                    position,
                    ..Default::default()
                }),
                ..Default::default()
            };

            self.send_segment(PacketSegment {
                source_actor: self.player_data.actor_id,
                target_actor: self.player_data.actor_id,
                segment_type: SegmentType::Ipc { data: ipc },
            })
            .await;
        }
    }

    pub async fn change_zone(&mut self, new_zone_id: u16) {
        self.zone = Zone::load(new_zone_id);

        // Player Class Info
        {
            let ipc = ServerZoneIpcSegment {
                op_code: ServerZoneIpcType::UpdateClassInfo,
                timestamp: timestamp_secs(),
                data: ServerZoneIpcData::UpdateClassInfo(UpdateClassInfo {
                    class_id: 35,
                    unknown: 1,
                    synced_level: 90,
                    class_level: 90,
                    ..Default::default()
                }),
                ..Default::default()
            };

            self.send_segment(PacketSegment {
                source_actor: self.player_data.actor_id,
                target_actor: self.player_data.actor_id,
                segment_type: SegmentType::Ipc { data: ipc },
            })
            .await;
        }

        // link shell information
        {
            let ipc = ServerZoneIpcSegment {
                op_code: ServerZoneIpcType::LinkShellInformation,
                timestamp: timestamp_secs(),
                data: ServerZoneIpcData::LinkShellInformation { unk: [0; 456] },
                ..Default::default()
            };

            self.send_segment(PacketSegment {
                source_actor: self.player_data.actor_id,
                target_actor: self.player_data.actor_id,
                segment_type: SegmentType::Ipc { data: ipc },
            })
            .await;
        }

        // TODO: send unk16?

        // Init Zone
        {
            let ipc = ServerZoneIpcSegment {
                op_code: ServerZoneIpcType::InitZone,
                timestamp: timestamp_secs(),
                data: ServerZoneIpcData::InitZone(InitZone {
                    server_id: 0,
                    zone_id: self.zone.id,
                    weather_id: 1,
                    ..Default::default()
                }),
                ..Default::default()
            };

            self.send_segment(PacketSegment {
                source_actor: self.player_data.actor_id,
                target_actor: self.player_data.actor_id,
                segment_type: SegmentType::Ipc { data: ipc },
            })
            .await;
        }
    }

    pub async fn change_weather(&mut self, new_weather_id: u16) {
        let ipc = ServerZoneIpcSegment {
            op_code: ServerZoneIpcType::WeatherChange,
            timestamp: timestamp_secs(),
            data: ServerZoneIpcData::WeatherChange(WeatherChange {
                weather_id: new_weather_id,
                transistion_time: 1.0,
            }),
            ..Default::default()
        };

        self.send_segment(PacketSegment {
            source_actor: self.player_data.actor_id,
            target_actor: self.player_data.actor_id,
            segment_type: SegmentType::Ipc { data: ipc },
        })
        .await;
    }

    pub fn get_free_spawn_index(&mut self) -> u8 {
        self.spawn_index += 1;
        self.spawn_index
    }
}