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use std::collections::HashMap;
use crate::{
PlayerId,
RoomId,
room::Room,
worldloader::WorldLoader,
persistence::PersistentStorage,
playerstate::{PlayerState, RoomPos},
Encyclopedia,
controls::Control,
Result,
aerr,
worldmessages::WorldMessage,
Timestamp,
purgatory
};
pub struct World<'a, 'b> {
template_loader: WorldLoader,
persistence: Box<dyn PersistentStorage>,
default_room: RoomId,
players: HashMap<PlayerId, RoomId>,
rooms: HashMap<RoomId, Room<'a, 'b>>,
room_age: HashMap<RoomId, u32>,
encyclopedia: Encyclopedia,
time: Timestamp
}
impl <'a, 'b>World<'a, 'b> {
pub fn new(encyclopedia: Encyclopedia, template_loader: WorldLoader, persistence: Box<dyn PersistentStorage>, default_room: RoomId) -> Self {
World {
template_loader,
time: persistence.load_world_meta().unwrap_or(Timestamp(1000000)),
persistence,
default_room,
encyclopedia: encyclopedia.clone(),
players: HashMap::new(),
rooms: HashMap::new(),
room_age: HashMap::new()
}
}
fn get_room_mut(&mut self, id: &RoomId) -> Result<&mut Room<'a, 'b>> {
self.room_age.insert(id.clone(), 0);
let result = self.get_room_mut_(id);
if let Err(err) = &result {
println!("Failed to load room {:?}: {:?}", id, err);
}
result
}
fn get_room_mut_(&mut self, id: &RoomId) -> Result<&mut Room<'a, 'b>> {
if !self.rooms.contains_key(id){
println!("loading room '{}'", id.name);
let mut room: Room = if id == &purgatory::purgatory_id() {
purgatory::create_purgatory(&self.encyclopedia)
} else {
let template = self.template_loader.load_room(id.clone())?;
Room::create(id.clone(), &self.encyclopedia, &template)
};
if let Ok(state) = self.persistence.load_room(id.clone()){
room.load_saved(&state);
}
let last_time = self.time - 1;
if room.get_time() < last_time {
room.update(last_time);
}
self.rooms.insert(id.clone(), room);
}
// todo: log any that occurs (and still return it)
self.rooms.get_mut(id).ok_or(aerr!("can't get room after loading it"))
}
fn add_loaded_player(&mut self, state: PlayerState) -> Result<()> {
let roomid = state.clone().room.unwrap_or_else(|| self.default_room.clone());
let room = self.get_room_mut(&roomid)?;
room.add_player(&state)?;
self.players.insert(state.id, roomid);
Ok(())
}
pub fn add_player(&mut self, playerid: &PlayerId) -> Result<()> {
let mut state = self.persistence
.load_player(playerid.clone())
.unwrap_or_else(|_err| // todo: what if player exists but can't be loaded for another reason?
PlayerState::new(playerid.clone())
);
if state.room == Some(purgatory::purgatory_id()){
state.respawn();
}
if let Err(_e) = self.add_loaded_player(state.clone()){
state.room = None;
state.pos = RoomPos::Unknown;
if let Err(_e) = self.add_loaded_player(state.clone()) {
state.room = Some(purgatory::purgatory_id());
self.add_loaded_player(state)?;
}
}
Ok(())
}
fn discorporate_player(&mut self, playerid: &PlayerId) -> Result<PlayerState> {
let roomid = self.players.remove(playerid).ok_or(aerr!("player not found"))?;
let room = self.get_room_mut(&roomid)?;
room.remove_player(playerid)
}
pub fn remove_player(&mut self, playerid: &PlayerId) -> Result<()> {
let player_state = self.discorporate_player(playerid)?;
self.persistence.save_player(playerid.clone(), player_state)?;
Ok(())
}
pub fn control_player(&mut self, player: PlayerId, control: Control) -> Result<()>{
let roomid = self.players.get(&player).ok_or(aerr!("player not found"))?.clone();
self.get_room_mut(&roomid)?.control_player(player, control);
Ok(())
}
fn migrate_player(&mut self, player: &PlayerId, destination: RoomId, roompos: RoomPos) -> Result<()> {
let mut state = self.discorporate_player(player)?;
let old_room = state.room;
state.room = Some(destination);
state.pos = roompos;
if let Err(_e) = self.add_loaded_player(state.clone()){
state.room = old_room;
state.pos = RoomPos::Unknown;
if let Err(_e) = self.add_loaded_player(state.clone()) {
state.room = None;
if let Err(_e) = self.add_loaded_player(state.clone()) {
state.room = Some(purgatory::purgatory_id());
self.add_loaded_player(state)?;
}
}
}
Ok(())
}
pub fn update(&mut self) {
self.migrate();
for room in self.rooms.values_mut() {
room.update(self.time);
}
self.time.0 += 1;
}
fn migrate(&mut self) {
let mut migrants = Vec::new();
for room in self.rooms.values_mut() {
migrants.append(&mut room.emigrate());
}
for (player, destination, roompos) in migrants {
self.migrate_player(&player, destination, roompos).unwrap();
}
}
pub fn save(&self) {
for room in self.rooms.values() {
if let Err(err) = self.persistence.save_room(room.id.clone(), room.save()) {
println!("{:?}",err);
}
for (playerid, state) in room.save_players() {
if let Err(err) = self.persistence.save_player(playerid.clone(), state.clone()) {
println!("{:?}",err);
}
}
}
if let Err(err) = self.persistence.save_world_meta(self.time) {
println!("{:?}",err);
}
}
pub fn unload_rooms(&mut self){
let mut to_remove = Vec::new();
for roomid in self.rooms.keys() {
if self.rooms[roomid].has_players() {
self.room_age.insert(roomid.clone(), 0);
} else {
let age = *self.room_age.get(&roomid).unwrap_or(&0) + 1;
self.room_age.insert(roomid.clone(), age);
if age > 2 {
to_remove.push(roomid.clone());
}
}
}
for roomid in to_remove {
println!("unloading room '{}'", roomid.name);
self.rooms.remove(&roomid);
}
}
pub fn view(&self) -> HashMap<PlayerId, WorldMessage> {
let mut views = HashMap::new();
for room in self.rooms.values() {
for (player, message) in room.view().into_iter() {
views.insert(player, message);
}
}
views
}
}
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