127 lines
4.6 KiB
Rust
127 lines
4.6 KiB
Rust
use specs::prelude::*;
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use specs::saveload::{SimpleMarker, SimpleMarkerAllocator, SerializeComponents, DeserializeComponents, MarkedBuilder};
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use specs::error::NoError;
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use super::components::*;
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use std::fs::File;
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use std::path::Path;
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use std::fs;
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macro_rules! serialize_individually {
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($ecs:expr, $ser:expr, $data:expr, $( $type:ty),*) => {
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$(
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SerializeComponents::<NoError, SimpleMarker<SerializeMe>>::serialize(
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&( $ecs.read_storage::<$type>(), ),
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&$data.0,
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&$data.1,
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&mut $ser,
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)
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.unwrap();
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)*
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};
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}
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#[cfg(target_arch = "wasm32")]
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pub fn save_game(_ecs : &mut World) {
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}
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#[cfg(not(target_arch = "wasm32"))]
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pub fn save_game(ecs : &mut World) {
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// Create helper
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let mapcopy = ecs.get_mut::<super::map::Map>().unwrap().clone();
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let savehelper = ecs
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.create_entity()
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.with(SerializationHelper{ map : mapcopy })
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.marked::<SimpleMarker<SerializeMe>>()
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.build();
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// Actually serialize
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{
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let data = ( ecs.entities(), ecs.read_storage::<SimpleMarker<SerializeMe>>() );
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let writer = File::create("./savegame.json").unwrap();
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let mut serializer = serde_json::Serializer::new(writer);
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serialize_individually!(ecs, serializer, data, Position, Renderable, Player, Viewshed, Monster,
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Name, BlocksTile, CombatStats, SufferDamage, WantsToInteract, Item, Consumable, Ranged, InflictsDamage,
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AreaOfEffect, Confusion, ProvidesHealing, InBackpack, WantsToPickupItem, WantsToUseItem,
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WantsToDropItem, SerializationHelper, Equippable, Equipped, MeleePowerBonus, DefenseBonus,
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WantsToRemoveItem, ParticleLifetime, HungerClock, ProvidesFood, MagicMapper, Hidden,
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EntryTrigger, EntityMoved, SingleActivation, BlocksVisibility, Door
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);
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}
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// Clean up
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ecs.delete_entity(savehelper).expect("Crash on cleanup");
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}
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pub fn does_save_exist() -> bool {
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Path::new("./savegame.json").exists()
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}
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macro_rules! deserialize_individually {
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($ecs:expr, $de:expr, $data:expr, $( $type:ty),*) => {
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$(
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DeserializeComponents::<NoError, _>::deserialize(
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&mut ( &mut $ecs.write_storage::<$type>(), ),
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&$data.0, // entities
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&mut $data.1, // marker
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&mut $data.2, // allocater
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&mut $de,
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)
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.unwrap();
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)*
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};
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}
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pub fn load_game(ecs: &mut World) {
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{
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// Delete everything
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let mut to_delete = Vec::new();
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for e in ecs.entities().join() {
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to_delete.push(e);
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}
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for del in to_delete.iter() {
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ecs.delete_entity(*del).expect("Deletion failed");
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}
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}
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let data = fs::read_to_string("./savegame.json").unwrap();
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let mut de = serde_json::Deserializer::from_str(&data);
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{
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let mut d = (&mut ecs.entities(), &mut ecs.write_storage::<SimpleMarker<SerializeMe>>(), &mut ecs.write_resource::<SimpleMarkerAllocator<SerializeMe>>());
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deserialize_individually!(ecs, de, d, Position, Renderable, Player, Viewshed, Monster,
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Name, BlocksTile, CombatStats, SufferDamage, WantsToInteract, Item, Consumable, Ranged, InflictsDamage,
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AreaOfEffect, Confusion, ProvidesHealing, InBackpack, WantsToPickupItem, WantsToUseItem,
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WantsToDropItem, SerializationHelper, Equippable, Equipped, MeleePowerBonus, DefenseBonus,
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WantsToRemoveItem, ParticleLifetime, HungerClock, ProvidesFood, MagicMapper, Hidden,
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EntryTrigger, EntityMoved, SingleActivation, BlocksVisibility, Door
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);
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}
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let mut deleteme : Option<Entity> = None;
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{
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let entities = ecs.entities();
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let helper = ecs.read_storage::<SerializationHelper>();
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let player = ecs.read_storage::<Player>();
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let position = ecs.read_storage::<Position>();
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for (e,h) in (&entities, &helper).join() {
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let mut worldmap = ecs.write_resource::<super::map::Map>();
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*worldmap = h.map.clone();
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worldmap.tile_content = vec![Vec::new(); (worldmap.height * worldmap.width) as usize];
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deleteme = Some(e);
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}
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for (e,_p,pos) in (&entities, &player, &position).join() {
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let mut ppos = ecs.write_resource::<rltk::Point>();
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*ppos = rltk::Point::new(pos.x, pos.y);
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let mut player_resource = ecs.write_resource::<Entity>();
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*player_resource = e;
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}
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}
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ecs.delete_entity(deleteme.unwrap()).expect("Unable to delete helper");
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}
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pub fn delete_save() {
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if Path::new("./savegame.json").exists() { std::fs::remove_file("./savegame.json").expect("Unable to delete file"); }
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}
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