saveload system

localstorage isn't supported by wasm, so playing online will probably just not have save games for a while

src/components.rs

@@ -1,14 +1,26 @@
 use rltk::RGB;
+use serde::{Deserialize, Serialize};
+use specs::error::NoError;
 use specs::prelude::*;
+use specs::saveload::{ConvertSaveload, Marker};
 use specs_derive::*;
 
-#[derive(Component)]
+// Serialization helper code. We need to implement ConvertSaveload for each type that contains an
+// Entity.
+pub struct SerializeMe;
+// Special component that exists to help serialize the game data
+#[derive(Component, Serialize, Deserialize, Clone)]
+pub struct SerializationHelper {
+    pub map: super::map::Map,
+}
+
+#[derive(Component, ConvertSaveload, Clone)]
 pub struct Position {
     pub x: i32,
     pub y: i32,
 }
 
-#[derive(Component)]
+#[derive(Component, ConvertSaveload, Clone)]
 pub struct Renderable {
     pub glyph: rltk::FontCharType,
     pub fg: RGB,
@@ -16,28 +28,28 @@ pub struct Renderable {
     pub render_order: i32,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
 pub struct Player {}
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
 pub struct Monster {}
 
-#[derive(Component)]
+#[derive(Component, ConvertSaveload, Clone)]
 pub struct Viewshed {
     pub visible_tiles: Vec<rltk::Point>,
     pub range: i32,
     pub dirty: bool,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct Name {
     pub name: String,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
 pub struct BlocksTile {}
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct CombatStats {
     pub max_hp: i32,
     pub hp: i32,
@@ -45,12 +57,12 @@ pub struct CombatStats {
     pub power: i32,
 }
 
-#[derive(Component, Debug, Clone)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct WantsToMelee {
     pub target: Entity,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct SufferDamage {
     pub amount: Vec<i32>,
 }
@@ -66,63 +78,63 @@ impl SufferDamage {
     }
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
 pub struct Item {}
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct ProvidesHealing {
     pub amount: i32,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct InflictsDamage {
     pub amount: i32,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct Ranged {
     pub range: i32,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct AOE {
     pub radius: i32,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload, Clone)]
 pub struct Confusion {
     pub turns: i32,
 }
 
-#[derive(Component, Debug, Clone)]
+#[derive(Component, Debug, ConvertSaveload)]
 pub struct InBackpack {
     pub owner: Entity,
 }
 
-#[derive(Component, Debug, Clone)]
+#[derive(Component, Debug, ConvertSaveload)]
 pub struct WantsToPickupItem {
     pub collected_by: Entity,
     pub item: Entity,
 }
 
-#[derive(Component, Debug, Clone)]
+#[derive(Component, Debug, ConvertSaveload)]
 pub struct WantsToDropItem {
     pub item: Entity,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, ConvertSaveload)]
 pub struct WantsToUseItem {
     pub item: Entity,
     pub target: Option<rltk::Point>,
 }
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
 pub struct Consumable {}
 
-#[derive(Component, Debug)]
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
 pub struct Destructible {}
 
-#[derive(Component, Clone)]
+#[derive(Component, Clone, ConvertSaveload)]
 pub struct ParticleLifetime {
     pub lifetime_ms: f32,
 }