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

use std::io;

use ntex::util::ByteString;

use crate::{error, v5::codec};

pub use crate::v5::control::{Closed, ControlAck, Disconnect, Error, ProtocolError};

/// Client control messages
#[derive(Debug)]
pub enum Control<E> {
    /// Unhandled publish packet
    Publish(Publish),
    /// Disconnect packet
    Disconnect(Disconnect),
    /// Application level error from resources and control services
    Error(Error<E>),
    /// Protocol level error
    ProtocolError(ProtocolError),
    /// Connection closed
    Closed(Closed),
    /// Peer is gone
    PeerGone(PeerGone),
}

impl<E> Control<E> {
    pub(super) fn publish(pkt: codec::Publish, size: u32) -> Self {
        Control::Publish(Publish(pkt, size))
    }

    pub(super) fn dis(pkt: codec::Disconnect, size: u32) -> Self {
        Control::Disconnect(Disconnect(pkt, size))
    }

    pub(super) const fn closed() -> Self {
        Control::Closed(Closed)
    }

    pub(super) fn error(err: E) -> Self {
        Control::Error(Error::new(err))
    }

    pub(super) fn proto_error(err: error::ProtocolError) -> Self {
        Control::ProtocolError(ProtocolError::new(err))
    }

    pub(super) fn peer_gone(err: Option<io::Error>) -> Self {
        Control::PeerGone(PeerGone(err))
    }

    pub fn disconnect(&self, pkt: codec::Disconnect) -> ControlAck {
        ControlAck { packet: Some(codec::Packet::Disconnect(pkt)), disconnect: true }
    }

    /// Ack control message
    pub fn ack(self) -> ControlAck {
        match self {
            Control::Publish(_) => {
                crate::v5::disconnect("Publish control message is not supported")
            }
            Control::Disconnect(msg) => msg.ack(),
            Control::Closed(msg) => msg.ack(),
            Control::Error(_) => {
                crate::v5::disconnect("Error control message is not supported")
            }
            Control::ProtocolError(msg) => msg.ack(),
            Control::PeerGone(msg) => msg.ack(),
        }
    }
}

#[derive(Debug)]
pub struct Publish(codec::Publish, u32);

impl Publish {
    /// Returns reference to publish packet
    pub fn packet(&self) -> &codec::Publish {
        &self.0
    }

    /// Returns reference to publish packet
    pub fn packet_mut(&mut self) -> &mut codec::Publish {
        &mut self.0
    }

    /// Returns size of the packet
    pub fn packet_size(&self) -> u32 {
        self.1
    }

    pub fn ack_qos0(self) -> ControlAck {
        ControlAck { packet: None, disconnect: false }
    }

    pub fn ack(self, reason_code: codec::PublishAckReason) -> ControlAck {
        ControlAck {
            packet: self.0.packet_id.map(|packet_id| {
                codec::Packet::PublishAck(codec::PublishAck {
                    packet_id,
                    reason_code,
                    properties: codec::UserProperties::new(),
                    reason_string: None,
                })
            }),
            disconnect: false,
        }
    }

    pub fn ack_with(
        self,
        reason_code: codec::PublishAckReason,
        properties: codec::UserProperties,
        reason_string: Option<ByteString>,
    ) -> ControlAck {
        ControlAck {
            packet: self.0.packet_id.map(|packet_id| {
                codec::Packet::PublishAck(codec::PublishAck {
                    packet_id,
                    reason_code,
                    properties,
                    reason_string,
                })
            }),
            disconnect: false,
        }
    }

    pub fn into_inner(
        self,
        reason_code: codec::PublishAckReason,
    ) -> (ControlAck, codec::Publish) {
        (
            ControlAck {
                packet: self.0.packet_id.map(|packet_id| {
                    codec::Packet::PublishAck(codec::PublishAck {
                        packet_id,
                        reason_code,
                        properties: codec::UserProperties::new(),
                        reason_string: None,
                    })
                }),
                disconnect: false,
            },
            self.0,
        )
    }
}

#[derive(Debug)]
pub struct PeerGone(Option<io::Error>);

impl PeerGone {
    /// Returns error reference
    pub fn error(&self) -> Option<&io::Error> {
        self.0.as_ref()
    }

    /// Ack PeerGone message
    pub fn ack(self) -> ControlAck {
        ControlAck { packet: None, disconnect: true }
    }
}