botrs 0.12.2

A Rust QQ Bot framework based on QQ Guild Bot API
Documentation 
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

use crate::intents::Intents;
use crate::token::Token;
use std::sync::Arc;
use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
use std::time::{Duration, Instant};
use tokio_tungstenite::{MaybeTlsStream, WebSocketStream};

pub(super) type WsStream = WebSocketStream<MaybeTlsStream<tokio::net::TcpStream>>;
pub(super) const SESSION_START_LIMIT_WINDOW_SECS: u64 = 2;

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub(super) enum GatewayAction {
    Continue,
    Reconnect,
}

/// WebSocket gateway client for the QQ Guild Bot API.
pub struct Gateway {
    /// Gateway URL
    pub(super) url: String,
    /// Bot token
    pub(super) token: Token,
    /// Intent flags
    pub(super) intents: Intents,
    /// Shard information [shard_id, shard_count]
    pub(super) shard: Option<[u32; 2]>,
    /// Session ID for resuming
    pub(super) session_id: Option<String>,
    /// Last sequence number received
    pub(super) last_seq: Arc<AtomicU64>,
    /// Heartbeat interval in milliseconds
    pub(super) heartbeat_interval: Option<u64>,
    /// Whether the connection is ready
    pub(super) is_ready: Arc<AtomicBool>,
    /// Whether we can reconnect
    pub(super) can_reconnect: Arc<AtomicBool>,
    /// Atomic heartbeat interval for sharing between tasks
    pub(super) heartbeat_interval_ms: Arc<AtomicU64>,
    /// Heartbeat task handle for cleanup
    pub(super) heartbeat_handle: Option<tokio::task::JoinHandle<()>>,
    /// Connection alive status
    pub(super) connection_alive: Arc<AtomicBool>,
    /// Connection start time for duration tracking
    pub(super) connection_start_time: Option<Instant>,
    /// Total heartbeats sent counter
    pub(super) heartbeat_count: Arc<AtomicU64>,
    /// Last heartbeat ACK time for monitoring
    pub(super) last_heartbeat_ack: Arc<AtomicU64>,
    /// Heartbeat sent time for ACK tracking
    pub(super) last_heartbeat_sent: Arc<AtomicU64>,
    /// Fixed interval between reconnect attempts, derived from gateway session limits
    pub(super) reconnect_interval: Duration,
}

impl Gateway {
    /// Creates a gateway client for one websocket session or shard.
    ///
    /// # Examples
    ///
    /// ```rust,no_run
    /// use botrs::{Token, Intents};
    /// use botrs::gateway::Gateway;
    ///
    /// let token = Token::new("app_id", "secret");
    /// let intents = Intents::default();
    /// let gateway = Gateway::new("wss://api.sgroup.qq.com/websocket", token, intents, None);
    /// ```
    pub fn new(
        url: impl Into<String>,
        token: Token,
        intents: Intents,
        shard: Option<[u32; 2]>,
    ) -> Self {
        Self {
            url: url.into(),
            token,
            intents,
            shard,
            session_id: None,
            heartbeat_interval: None,
            last_seq: Arc::new(AtomicU64::new(0)),
            is_ready: Arc::new(AtomicBool::new(false)),
            can_reconnect: Arc::new(AtomicBool::new(true)),
            heartbeat_interval_ms: Arc::new(AtomicU64::new(30000)),
            heartbeat_handle: None,
            connection_alive: Arc::new(AtomicBool::new(false)),
            connection_start_time: None,
            heartbeat_count: Arc::new(AtomicU64::new(0)),
            last_heartbeat_ack: Arc::new(AtomicU64::new(0)),
            last_heartbeat_sent: Arc::new(AtomicU64::new(0)),
            reconnect_interval: Duration::from_secs(SESSION_START_LIMIT_WINDOW_SECS),
        }
    }

    /// Configures the fixed reconnect interval used after a connection exits.
    ///
    /// Official SDKs throttle new websocket starts with a session-manager interval
    /// rather than a long-lived exponential backoff. A zero duration is normalized
    /// to one second to avoid tight reconnect loops.
    pub fn with_reconnect_interval(mut self, reconnect_interval: Duration) -> Self {
        self.reconnect_interval = if reconnect_interval.is_zero() {
            Duration::from_secs(1)
        } else {
            reconnect_interval
        };
        self
    }

    pub(crate) fn with_resume_state(
        mut self,
        session_id: impl Into<String>,
        last_seq: u64,
    ) -> Self {
        self.session_id = Some(session_id.into());
        self.last_seq.store(last_seq, Ordering::Relaxed);
        self
    }

    /// Calculates a session start interval from gateway limits.
    ///
    /// Uses `round(2 / max_concurrency)` and guards the interval to at
    /// least one second before starting the next websocket session.
    pub fn session_start_interval(max_concurrency: u32) -> Duration {
        let max_concurrency = u64::from(max_concurrency.max(1));
        let quotient = SESSION_START_LIMIT_WINDOW_SECS / max_concurrency;
        let remainder = SESSION_START_LIMIT_WINDOW_SECS % max_concurrency;

        let rounded = match remainder.saturating_mul(2).cmp(&max_concurrency) {
            std::cmp::Ordering::Less => quotient,
            std::cmp::Ordering::Greater => quotient + 1,
            std::cmp::Ordering::Equal if quotient.is_multiple_of(2) => quotient,
            std::cmp::Ordering::Equal => quotient + 1,
        };

        Duration::from_secs(rounded.max(1))
    }
}