another-rxrust 0.0.46

A different implementation than `rxRust` for easier use of `ReactiveX` in `Rust`.
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

use crate::internals::stream_controller::*;
use crate::prelude::*;
use std::{
  collections::VecDeque,
  sync::{Arc, RwLock},
};

#[derive(Clone)]
pub struct Concat<'a, Item>
where
  Item: Clone + Send + Sync,
{
  observables: Vec<Observable<'a, Item>>,
}

impl<'a, Item> Concat<'a, Item>
where
  Item: Clone + Send + Sync,
{
  pub fn new(observables: &[Observable<'a, Item>]) -> Concat<'a, Item> {
    Concat { observables: observables.to_vec() }
  }
  pub fn execute(&self, source: Observable<'a, Item>) -> Observable<'a, Item> {
    let observables = Arc::new(RwLock::new(VecDeque::from_iter(
      self.observables.clone().into_iter(),
    )));
    Observable::create(move |s| {
      let sctl = StreamController::new(s);

      fn complete_and_next<'a, Item>(
        idx: usize,
        observables: Arc<RwLock<VecDeque<Observable<'a, Item>>>>,
        sctl: StreamController<'a, Item>,
      ) where
        Item: Clone + Send + Sync,
      {
        if observables.read().unwrap().is_empty() {
          sctl.sink_complete_force();
          return;
        }
        let o = observables.write().unwrap().pop_front().unwrap();

        let sctl_next = sctl.clone();
        let sctl_error = sctl.clone();
        let sctl_complete = sctl.clone();

        o.inner_subscribe(sctl.new_observer(
          move |_, x| {
            sctl_next.sink_next(x);
          },
          move |_, e| {
            sctl_error.sink_error(e);
          },
          move |_| {
            complete_and_next(
              idx + 1,
              Arc::clone(&observables),
              sctl_complete.clone(),
            );
          },
        ));
      }

      {
        let complete_and_next = complete_and_next.clone();
        let sctl_error = sctl.clone();
        let sctl_next = sctl.clone();
        let sctl_complete = sctl.clone();
        let observables = Arc::clone(&observables);
        source.inner_subscribe(sctl.new_observer(
          move |_, x| {
            sctl_next.sink_next(x);
          },
          move |_, e| {
            sctl_error.sink_error(e);
          },
          move |_| {
            complete_and_next(
              0,
              Arc::clone(&observables),
              sctl_complete.clone(),
            );
          },
        ));
      }
    })
  }
}

impl<'a, Item> Observable<'a, Item>
where
  Item: Clone + Send + Sync,
{
  pub fn concat(
    &self,
    observables: &[Observable<'a, Item>],
  ) -> Observable<'a, Item> {
    Concat::new(observables).execute(self.clone())
  }
}

#[cfg(all(test, not(feature = "web")))]
mod test {
  use crate::prelude::*;
  use std::{thread, time};

  #[test]
  fn basic() {
    observables::from_iter(0..10)
      .concat(&[
        observables::from_iter(10..20),
        observables::from_iter(20..30),
      ])
      .subscribe(
        print_next_fmt!("{:?}"),
        print_error!(),
        print_complete!(),
      );
  }

  #[test]
  fn thread() {
    observables::from_iter(0..10)
      .observe_on(schedulers::new_thread_scheduler())
      .concat(&[
        observables::from_iter(10..20)
          .observe_on(schedulers::new_thread_scheduler()),
        observables::from_iter(20..30)
          .observe_on(schedulers::new_thread_scheduler()),
      ])
      .subscribe(
        print_next_fmt!("{:?}"),
        print_error!(),
        print_complete!(),
      );
    thread::sleep(time::Duration::from_millis(1000));
  }
}