bevy_replicon 0.39.5

A server-authoritative replication crate for Bevy
Documentation 
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use bevy::{ecs::component::ComponentId, prelude::*};

use crate::{prelude::*, shared::server_entity_map::ServerEntityMap};

/// Replication context for serialization function.
#[non_exhaustive]
pub struct SerializeCtx<'a> {
    /// ID of the serializing component.
    pub component_id: ComponentId,

    /// Current tick.
    pub server_tick: RepliconTick,

    /// Registry of reflected types.
    pub type_registry: &'a AppTypeRegistry,
}

/// Replication context for writing and deserialization.
#[non_exhaustive]
pub struct WriteCtx<'a, 'w> {
    /// Maps server entities to client entities and vice versa.
    pub entity_map: &'a mut ServerEntityMap,

    /// Registry of reflected types.
    pub type_registry: &'a AppTypeRegistry,

    /// ID of the writing component.
    pub component_id: ComponentId,

    /// Tick for the currently processing message.
    pub message_tick: RepliconTick,

    /// World's entities to reserve IDs on new entities inside components.
    pub(crate) spawner: &'a mut EntitySpawner<'w>,

    /// Disables mapping logic to avoid spawning entities for consume functions.
    pub(crate) ignore_mapping: bool,
}

impl EntityMapper for WriteCtx<'_, '_> {
    fn get_mapped(&mut self, server_entity: Entity) -> Entity {
        if self.ignore_mapping {
            return server_entity;
        }

        self.entity_map
            .server_entry(server_entity)
            .or_insert_with(|| self.spawner.spawn_empty())
    }

    fn set_mapped(&mut self, _source: Entity, _target: Entity) {
        unimplemented!()
    }
}

/// Replication context for removal.
#[non_exhaustive]
pub struct RemoveCtx {
    /// ID of the removing component.
    pub component_id: ComponentId,

    /// Tick for the currently processing message.
    pub message_tick: RepliconTick,
}

/// Replication context for despawn.
#[non_exhaustive]
pub struct DespawnCtx {
    /// Tick for the currently processing message.
    pub message_tick: RepliconTick,
}

/// A wrapper around [`World`] for spawning empty entities.
pub(crate) struct EntitySpawner<'a> {
    world: &'a mut World,
}

impl<'a> EntitySpawner<'a> {
    pub(crate) fn new(world: &'a mut World) -> Self {
        Self { world }
    }

    fn spawn_empty(&mut self) -> Entity {
        self.world.spawn_empty().id()
    }
}