snoo 0.0.4

Reddit client.
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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159

use std::cell::Cell;
use tokio::time::{delay_for, delay_until, Duration, Instant};

use std::sync::Arc;
use tokio::sync::Mutex;

#[derive(Clone)]
pub enum RateLimiter {
    Batched(RateLimiterBatched),
    Paced(RateLimiterPaced),
    Off,
}

impl RateLimiter {
    pub const RESET_HEADER: &'static str = "x-ratelimit-reset";
    pub const USED_HEADER: &'static str = "x-ratelimit-used";
    pub const REMANING_HEADER: &'static str = "x-ratelimit-remaining";

    pub fn new_batched() -> RateLimiter {
        RateLimiter::Batched(RateLimiterBatched::new())
    }
    pub fn new_paced() -> RateLimiter {
        RateLimiter::Paced(RateLimiterPaced::new())
    }

    pub fn should_wait(&self) -> bool {
        match self {
            RateLimiter::Batched(r) => r.should_wait(),
            RateLimiter::Paced(r) => r.should_wait(),
            _ => false,
        }
    }

    pub async fn wait(&self) {
        match self {
            RateLimiter::Batched(r) => r.wait().await,
            RateLimiter::Paced(r) => r.wait().await,
            _ => {}
        }
    }

    pub fn should_update(&self) -> bool {
        match self {
            RateLimiter::Off => false,
            _ => true,
        }
    }

    pub fn update(&self, tracker: RateLimiterTracker) {
        match self {
            RateLimiter::Batched(r) => r.update(tracker),
            RateLimiter::Paced(r) => r.update(tracker),
            _ => {}
        }
    }
}
#[derive(Clone, Copy, Debug)]
pub struct RateLimiterTracker {
    remaning: i32,
    used: i32,
    reset_time: Instant,
}

impl RateLimiterTracker {
    pub fn new() -> Self {
        RateLimiterTracker {
            remaning: 100,
            used: 0,
            reset_time: Instant::now() + Duration::from_secs(60),
        }
    }

    pub fn new_safe() -> Arc<Mutex<Cell<Self>>> {
        Arc::from(Mutex::new(Cell::new(Self::new())))
    }

    pub fn from_values(remaning: i32, used: i32, reset_time: i32) -> Self {
        RateLimiterTracker {
            remaning: remaning,
            used: used,
            reset_time: Instant::now() + Duration::from_secs(reset_time as u64),
        }
    }

    pub fn set_remaning_time(&mut self, remaning: i32) {
        self.reset_time = Instant::now() + Duration::from_secs(remaning as u64);
    }
}
#[derive(Clone)]
pub struct RateLimiterBatched(Arc<Mutex<Cell<RateLimiterTracker>>>);

impl RateLimiterBatched {
    pub fn new() -> Self {
        RateLimiterBatched(RateLimiterTracker::new_safe())
    }

    pub fn should_wait(&self) -> bool {
        if let Ok(cell) = self.0.try_lock() {
            let inst = cell.get();
            inst.remaning == 0
        } else {
            false
        }
    }

    pub async fn wait(&self) {
        let reset_time = {
            let cell = self.0.lock().await;
            let inst = cell.get();
            inst.reset_time
        };
        delay_until(reset_time).await;
    }

    pub fn update(&self, tracker: RateLimiterTracker) {
        if let Ok(cell) = self.0.try_lock() {
            let mut inst = cell.get();
            inst.used = tracker.used;
            inst.remaning = tracker.remaning;
            inst.set_remaning_time(tracker.remaning);
            cell.set(inst);
        }
    }
}
#[derive(Clone)]
pub struct RateLimiterPaced(Arc<Mutex<Cell<RateLimiterTracker>>>);

impl RateLimiterPaced {
    pub fn new() -> Self {
        RateLimiterPaced(RateLimiterTracker::new_safe())
    }

    pub fn should_wait(&self) -> bool {
        true
    }

    pub async fn wait(&self) {
        let (remaning, reset_time) = {
            let cell = self.0.lock().await;
            let inst = cell.get();
            (inst.remaning, inst.reset_time)
        };

        let wait_for_s = (reset_time - Instant::now()).as_secs() as f32 / remaning as f32;
        if wait_for_s > 0.0 {
            delay_for(Duration::from_secs(wait_for_s as u64)).await;
        }
    }

    pub fn update(&self, tracker: RateLimiterTracker) {
        if let Ok(cell) = self.0.try_lock() {
            let mut inst = cell.get();
            inst.used = tracker.used;
            inst.remaning = tracker.remaning;
            inst.set_remaning_time(tracker.remaning);
            cell.set(inst);
        }
    }
}