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

use std::hash::Hash;

use naia_shared::{ReplicaMutWrapper, ReplicaRefWrapper, Replicate, WorldMutType, WorldRefType};

use crate::{room::RoomKey, server::Server};

// EntityRef

/// A reference to an Entity being tracked by the Server
pub struct EntityRef<E: Copy + Eq + Hash, W: WorldRefType<E>> {
    world: W,
    entity: E,
}

impl<E: Copy + Eq + Hash, W: WorldRefType<E>> EntityRef<E, W> {
    /// Return a new EntityRef
    pub(crate) fn new(world: W, entity: &E) -> Self {
        EntityRef {
            world,
            entity: *entity,
        }
    }

    /// Return the Entity itself
    pub fn id(&self) -> E {
        self.entity
    }

    // Components

    /// Returns whether or not the Entity has an associated Component
    pub fn has_component<R: Replicate>(&self) -> bool {
        self.world.has_component::<R>(&self.entity)
    }

    /// Gets a Ref to a Component associated with the Entity
    pub fn component<R: Replicate>(&self) -> Option<ReplicaRefWrapper<R>> {
        self.world.component::<R>(&self.entity)
    }
}

// EntityMut
pub struct EntityMut<'s, E: Copy + Eq + Hash + Send + Sync, W: WorldMutType<E>> {
    server: &'s mut Server<E>,
    world: W,
    entity: E,
}

impl<'s, E: Copy + Eq + Hash + Send + Sync, W: WorldMutType<E>> EntityMut<'s, E, W> {
    pub(crate) fn new(server: &'s mut Server<E>, world: W, entity: &E) -> Self {
        EntityMut {
            server,
            world,
            entity: *entity,
        }
    }

    pub fn id(&self) -> E {
        self.entity
    }

    pub fn despawn(&mut self) {
        self.server.despawn_entity(&mut self.world, &self.entity);
    }

    // Components

    pub fn has_component<R: Replicate>(&self) -> bool {
        self.world.has_component::<R>(&self.entity)
    }

    pub fn component<R: Replicate>(&mut self) -> Option<ReplicaMutWrapper<R>> {
        self.world.component_mut::<R>(&self.entity)
    }

    pub fn insert_component<R: Replicate>(&mut self, component_ref: R) -> &mut Self {
        self.server
            .insert_component(&mut self.world, &self.entity, component_ref);

        self
    }

    pub fn insert_components<R: Replicate>(&mut self, mut component_refs: Vec<R>) -> &mut Self {
        while let Some(component_ref) = component_refs.pop() {
            self.insert_component(component_ref);
        }

        self
    }

    pub fn remove_component<R: Replicate>(&mut self) -> Option<R> {
        self.server
            .remove_component::<R, W>(&mut self.world, &self.entity)
    }

    // Rooms

    pub fn enter_room(&mut self, room_key: &RoomKey) -> &mut Self {
        self.server.room_add_entity(room_key, &self.entity);

        self
    }

    pub fn leave_room(&mut self, room_key: &RoomKey) -> &mut Self {
        self.server.room_remove_entity(room_key, &self.entity);

        self
    }
}