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

use super::message_ops::Sealed;
use super::{Message, MessageKind, MessageOps};
use crate::error::SerializeError;
use crate::ids::ServiceCookie;
use crate::message_deserializer::{MessageDeserializeError, MessageWithValueDeserializer};
use crate::message_serializer::{MessageSerializeError, MessageSerializer};
use crate::serialized_value::{SerializedValue, SerializedValueSlice};
use crate::value_serializer::Serialize;
use bytes::BytesMut;

#[derive(Debug, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "fuzzing", derive(arbitrary::Arbitrary))]
pub struct EmitEvent {
    pub service_cookie: ServiceCookie,
    pub event: u32,
    pub value: SerializedValue,
}

impl EmitEvent {
    pub fn with_serialize_value<T: Serialize + ?Sized>(
        service_cookie: ServiceCookie,
        event: u32,
        value: &T,
    ) -> Result<Self, SerializeError> {
        let value = SerializedValue::serialize(value)?;
        Ok(Self {
            service_cookie,
            event,
            value,
        })
    }
}

impl MessageOps for EmitEvent {
    fn kind(&self) -> MessageKind {
        MessageKind::EmitEvent
    }

    fn serialize_message(self) -> Result<BytesMut, MessageSerializeError> {
        let mut serializer = MessageSerializer::with_value(self.value, MessageKind::EmitEvent)?;

        serializer.put_uuid(self.service_cookie.0);
        serializer.put_varint_u32_le(self.event);

        serializer.finish()
    }

    fn deserialize_message(buf: BytesMut) -> Result<Self, MessageDeserializeError> {
        let mut deserializer = MessageWithValueDeserializer::new(buf, MessageKind::EmitEvent)?;

        let service_cookie = deserializer.try_get_uuid().map(ServiceCookie)?;
        let event = deserializer.try_get_varint_u32_le()?;
        let value = deserializer.finish()?;

        Ok(Self {
            service_cookie,
            event,
            value,
        })
    }

    fn value(&self) -> Option<&SerializedValueSlice> {
        Some(&self.value)
    }
}

impl Sealed for EmitEvent {}

impl From<EmitEvent> for Message {
    fn from(msg: EmitEvent) -> Self {
        Self::EmitEvent(msg)
    }
}

#[cfg(test)]
mod test {
    use super::super::test::{assert_deserialize_eq_with_value, assert_serialize_eq};
    use super::super::Message;
    use super::EmitEvent;
    use crate::ids::ServiceCookie;
    use uuid::uuid;

    #[test]
    fn emit_event() {
        let serialized = [
            28, 0, 0, 0, 16, 2, 0, 0, 0, 3, 4, 0x02, 0x6c, 0x31, 0x42, 0x53, 0x0b, 0x4d, 0x65,
            0x85, 0x0d, 0xa2, 0x97, 0xdc, 0xc2, 0xfe, 0xcb, 1,
        ];
        let value = 4u8;

        let msg = EmitEvent::with_serialize_value(
            ServiceCookie(uuid!("026c3142-530b-4d65-850d-a297dcc2fecb")),
            1,
            &value,
        )
        .unwrap();
        assert_serialize_eq(&msg, serialized);
        assert_deserialize_eq_with_value(&msg, serialized, &value);

        let msg = Message::EmitEvent(msg);
        assert_serialize_eq(&msg, serialized);
        assert_deserialize_eq_with_value(&msg, serialized, &value);
    }
}