1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
use crate::{DynamicScene, Entity}; use anyhow::Result; use bevy_property::{ property_serde::{DynamicPropertiesDeserializer, DynamicPropertiesSerializer}, DynamicProperties, PropertyTypeRegistry, }; use serde::{ de::{DeserializeSeed, Error, MapAccess, SeqAccess, Visitor}, ser::{SerializeSeq, SerializeStruct}, Deserialize, Serialize, }; pub struct SceneSerializer<'a> { pub scene: &'a DynamicScene, pub registry: &'a PropertyTypeRegistry, } impl<'a> SceneSerializer<'a> { pub fn new(scene: &'a DynamicScene, registry: &'a PropertyTypeRegistry) -> Self { SceneSerializer { scene, registry } } } impl<'a> Serialize for SceneSerializer<'a> { fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer, { let mut state = serializer.serialize_seq(Some(self.scene.entities.len()))?; for entity in self.scene.entities.iter() { state.serialize_element(&EntitySerializer { entity, registry: self.registry, })?; } state.end() } } pub struct EntitySerializer<'a> { pub entity: &'a Entity, pub registry: &'a PropertyTypeRegistry, } impl<'a> Serialize for EntitySerializer<'a> { fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer, { let mut state = serializer.serialize_struct(ENTITY_STRUCT, 2)?; state.serialize_field(ENTITY_FIELD_ENTITY, &self.entity.entity)?; state.serialize_field( ENTITY_FIELD_COMPONENTS, &ComponentsSerializer { components: &self.entity.components, registry: self.registry, }, )?; state.end() } } pub struct ComponentsSerializer<'a> { pub components: &'a [DynamicProperties], pub registry: &'a PropertyTypeRegistry, } impl<'a> Serialize for ComponentsSerializer<'a> { fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer, { let mut state = serializer.serialize_seq(Some(self.components.len()))?; for dynamic_properties in self.components.iter() { state.serialize_element(&DynamicPropertiesSerializer::new( dynamic_properties, self.registry, ))?; } state.end() } } pub struct SceneDeserializer<'a> { pub property_type_registry: &'a PropertyTypeRegistry, } impl<'a, 'de> DeserializeSeed<'de> for SceneDeserializer<'a> { type Value = DynamicScene; fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> where D: serde::Deserializer<'de>, { let mut scene = DynamicScene::default(); scene.entities = deserializer.deserialize_seq(SceneEntitySeqVisiter { property_type_registry: self.property_type_registry, })?; Ok(scene) } } struct SceneEntitySeqVisiter<'a> { pub property_type_registry: &'a PropertyTypeRegistry, } impl<'a, 'de> Visitor<'de> for SceneEntitySeqVisiter<'a> { type Value = Vec<Entity>; fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result { formatter.write_str("list of entities") } fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> where A: SeqAccess<'de>, { let mut entities = Vec::new(); while let Some(entity) = seq.next_element_seed(SceneEntityDeserializer { property_type_registry: self.property_type_registry, })? { entities.push(entity); } Ok(entities) } } pub struct SceneEntityDeserializer<'a> { pub property_type_registry: &'a PropertyTypeRegistry, } impl<'a, 'de> DeserializeSeed<'de> for SceneEntityDeserializer<'a> { type Value = Entity; fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> where D: serde::Deserializer<'de>, { deserializer.deserialize_struct( ENTITY_STRUCT, &[ENTITY_FIELD_ENTITY, ENTITY_FIELD_COMPONENTS], SceneEntityVisiter { registry: self.property_type_registry, }, ) } } #[derive(Deserialize)] #[serde(field_identifier, rename_all = "lowercase")] enum EntityField { Entity, Components, } pub const ENTITY_STRUCT: &str = "Entity"; pub const ENTITY_FIELD_ENTITY: &str = "entity"; pub const ENTITY_FIELD_COMPONENTS: &str = "components"; #[derive(Debug)] struct SceneEntityVisiter<'a> { pub registry: &'a PropertyTypeRegistry, } impl<'a, 'de> Visitor<'de> for SceneEntityVisiter<'a> { type Value = Entity; fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result { formatter.write_str("entities") } fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> where A: MapAccess<'de>, { let mut id = None; let mut components = None; while let Some(key) = map.next_key()? { match key { EntityField::Entity => { if id.is_some() { return Err(Error::duplicate_field(ENTITY_FIELD_ENTITY)); } id = Some(map.next_value::<u32>()?); } EntityField::Components => { if components.is_some() { return Err(Error::duplicate_field(ENTITY_FIELD_COMPONENTS)); } components = Some(map.next_value_seed(ComponentVecDeserializer { registry: self.registry, })?); } } } let entity = id .as_ref() .ok_or_else(|| Error::missing_field(ENTITY_FIELD_ENTITY))?; let components = components .take() .ok_or_else(|| Error::missing_field(ENTITY_FIELD_COMPONENTS))?; Ok(Entity { entity: *entity, components, }) } } pub struct ComponentVecDeserializer<'a> { pub registry: &'a PropertyTypeRegistry, } impl<'a, 'de> DeserializeSeed<'de> for ComponentVecDeserializer<'a> { type Value = Vec<DynamicProperties>; fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> where D: serde::Deserializer<'de>, { deserializer.deserialize_seq(ComponentSeqVisiter { registry: self.registry, }) } } struct ComponentSeqVisiter<'a> { pub registry: &'a PropertyTypeRegistry, } impl<'a, 'de> Visitor<'de> for ComponentSeqVisiter<'a> { type Value = Vec<DynamicProperties>; fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result { formatter.write_str("list of components") } fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> where A: SeqAccess<'de>, { let mut dynamic_properties = Vec::new(); while let Some(entity) = seq.next_element_seed(DynamicPropertiesDeserializer::new(self.registry))? { dynamic_properties.push(entity); } Ok(dynamic_properties) } }