zen-engine 0.55.0

Business rules engine
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

pub mod http_handler;
pub(crate) mod v1;
pub(crate) mod v2;

use crate::nodes::definition::NodeHandler;
use crate::nodes::function::v1::{FunctionV1NodeHandler, FunctionV1Trace};
use crate::nodes::function::v2::{FunctionV2NodeHandler, FunctionV2Trace};
use crate::nodes::result::NodeResult;
use crate::nodes::NodeContext;
use std::sync::Arc;
use zen_types::decision::{FunctionContent, FunctionNodeContent};
use zen_types::variable::Variable;

#[derive(Debug, Clone)]
pub struct FunctionNodeHandler;

pub type FunctionNodeData = FunctionNodeContent;

pub type FunctionNodeTrace = Variable;

impl NodeHandler for FunctionNodeHandler {
    type NodeData = FunctionNodeData;
    type TraceData = FunctionNodeTrace;

    async fn handle(&self, ctx: NodeContext<Self::NodeData, Self::TraceData>) -> NodeResult {
        match &ctx.node {
            FunctionNodeContent::Version1(source) => {
                let v1_context = NodeContext::<Arc<str>, FunctionV1Trace> {
                    id: ctx.id.clone(),
                    name: ctx.name.clone(),
                    input: ctx.input.clone(),
                    extensions: ctx.extensions.clone(),
                    trace: ctx.config.trace.then(|| Default::default()),
                    iteration: ctx.iteration,
                    config: ctx.config,
                    node: source.clone(),
                };

                FunctionV1NodeHandler.handle(v1_context).await
            }
            FunctionNodeContent::Version2(content) => {
                let v2_context = NodeContext::<FunctionContent, FunctionV2Trace> {
                    id: ctx.id.clone(),
                    name: ctx.name.clone(),
                    input: ctx.input.clone(),
                    extensions: ctx.extensions.clone(),
                    trace: ctx.config.trace.then(|| Default::default()),
                    iteration: ctx.iteration,
                    config: ctx.config,
                    node: content.clone(),
                };

                FunctionV2NodeHandler.handle(v2_context).await
            }
        }
    }
}