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

use crate::tasks::task_client::data::TraceSubscribe;

use crate::datas::id::Id;
use crate::protocol::Protocol;
use crate::{
    ClientCommand, ClientData, ClientErr, FilterBuilder, ProtocolV4, ProtocolV5, QoS,
    TraceUnubscribe, UnsubscribeFilterBuilder,
};
use anyhow::Result;
use bytes::Bytes;
use data::MqttEvent;
use std::sync::Arc;
use tokio::sync::broadcast::{Receiver, Sender};
use tokio::sync::mpsc;

pub mod data;

#[derive(Clone)]
pub struct Client {
    protocol: Protocol,
    tx_client_command: mpsc::Sender<ClientCommand>,
    tx_client_data: mpsc::Sender<ClientData>,
    tx_to_client: Sender<MqttEvent>,
}

impl Client {
    pub fn init(
        tx_client_data: mpsc::Sender<ClientData>,
        tx_client_command: mpsc::Sender<ClientCommand>,
        tx_to_client: Sender<MqttEvent>,
        protocol: Protocol,
    ) -> Client {
        Client {
            tx_client_command,
            tx_to_client,
            tx_client_data,
            protocol,
        }
    }
    pub async fn publish<T: Into<Arc<String>>, D: Into<Bytes>>(
        &self,
        topic: T,
        qos: QoS,
        payload: D,
        retain: bool,
    ) -> Result<u32, ClientErr> {
        let id = Id::id();
        self.publish_with_trace_id(topic, qos, payload, retain, id)
            .await?;
        Ok(id)
    }
    pub async fn publish_with_trace_id<T: Into<Arc<String>>, D: Into<Bytes>>(
        &self,
        topic: T,
        qos: QoS,
        payload: D,
        retain: bool,
        trace_id: u32,
    ) -> Result<(), ClientErr> {
        let topic = topic.into();
        let payload = payload.into();
        if payload.len() + 4 + topic.len() > 268_435_455 {
            return Err(ClientErr::PayloadTooLong);
        };
        let trace_publish = ClientData::publish(
            topic,
            qos,
            payload.into(),
            retain,
            self.protocol(),
            trace_id,
        );
        self.tx_client_data.send(trace_publish).await?;
        Ok(())
    }
    pub async fn publish_by_arc<T: Into<Arc<String>>>(
        &self,
        topic: T,
        qos: QoS,
        payload: Arc<Bytes>,
        retain: bool,
    ) -> Result<u32, ClientErr> {
        let id = Id::id();
        let topic = topic.into();
        if payload.len() + 4 + topic.len() > 268_435_455 {
            return Err(ClientErr::PayloadTooLong);
        };
        let trace_publish = ClientData::publish(topic, qos, payload, retain, self.protocol(), id);
        self.tx_client_data.send(trace_publish).await?;
        Ok(id)
    }
    pub async fn to_subscribe<T: Into<String>>(&self, topic: T, qos: QoS) -> Result<u32> {
        let id = Id::id();
        self.to_subscribe_with_trace_id(topic, qos, id).await?;
        Ok(id)
    }

    pub async fn to_subscribe_with_trace_id<T: Into<String>>(
        &self,
        topic: T,
        qos: QoS,
        id: u32,
    ) -> Result<()> {
        let subscribe: TraceSubscribe = match self.protocol {
            Protocol::V4 => FilterBuilder::<ProtocolV4>::new(topic.into(), qos)
                .build(id)
                .into(),
            Protocol::V5 => FilterBuilder::<ProtocolV5>::new(topic.into(), qos)
                .build(id)
                .into(),
        };
        self.tx_client_data
            .send(ClientData::Subscribe(subscribe))
            .await?;
        Ok(())
    }

    pub async fn unsubscribe(&self, topic: String) -> anyhow::Result<u32> {
        let id = Id::id();
        self.unsubscribe_with_trace_id(topic, id).await?;
        Ok(id)
    }

    pub async fn unsubscribe_with_trace_id(&self, topic: String, id: u32) -> Result<()> {
        let unsubscribe: TraceUnubscribe = match self.protocol {
            Protocol::V4 => UnsubscribeFilterBuilder::<ProtocolV4>::new(topic)
                .build(id)
                .into(),
            Protocol::V5 => UnsubscribeFilterBuilder::<ProtocolV5>::new(topic)
                .build(id)
                .into(),
        };
        self.tx_client_data
            .send(ClientData::Unsubscribe(unsubscribe))
            .await?;
        Ok(())
    }

    pub async fn disconnect(&self) -> anyhow::Result<()> {
        self.tx_client_command
            .send(ClientCommand::DisconnectAndDrop)
            .await?;
        Ok(())
    }
    pub fn init_receiver(&self) -> Receiver<MqttEvent> {
        self.tx_to_client.subscribe()
    }

    fn protocol(&self) -> Protocol {
        self.protocol
    }
}