logic-mesh 1.0.0

Control logic engine using event based and reactive blocks written 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

// Copyright (c) 2022-2023, Radu Racariu.

use uuid::Uuid;

use crate::base::{
    block::{Block, BlockDesc, BlockProps, BlockState},
    input::{InputProps, input_reader::InputReader},
    output::Output,
};

use libhaystack::val::{Value, kind::HaystackKind};

use crate::{blocks::InputImpl, blocks::OutputImpl};

/// Performs an division of 2 numbers.
/// The operation would take into account the units of those input's values,
/// if the units are not convertible, the block would be in an error state.
#[block]
#[derive(BlockProps, Debug)]
#[dis = "Divide"]
#[category = "math"]
pub struct Div {
    #[input(kind = "Number")]
    pub a: InputImpl,
    #[input(kind = "Number")]
    pub b: InputImpl,
    #[output(kind = "Number")]
    pub out: OutputImpl,
}

impl Block for Div {
    async fn execute(&mut self) {
        self.read_inputs_until_ready().await;

        if let (Some(Value::Number(a)), Some(Value::Number(b))) =
            (self.a.get_value(), self.b.get_value())
            && let Ok(res) = *a / *b
        {
            self.out.set(res.into());
        }
    }
}

#[cfg(test)]
mod test {
    use assert_matches::assert_matches;

    use libhaystack::val::{Number, Value};

    use crate::{
        base::block::Block, base::block::test_utils::write_block_inputs, blocks::math::Div,
    };

    #[tokio::test]
    async fn test_div_block() {
        let mut block = Div::new();

        write_block_inputs([(&mut block.a, 42), (&mut block.b, 2)]).await;

        block.execute().await;

        assert_matches!(
            block.out.value,
            Value::Number(Number { value, .. }) if value.round() == 21.0
        );
    }
}