zen-engine 0.55.0

Business rules engine
Documentation 
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use serde::ser::SerializeMap;
use serde::{Serialize, Serializer};
use thiserror::Error;

#[derive(Debug, Error)]
pub enum DecisionGraphValidationError {
    #[error("Invalid input node count: {0}")]
    InvalidInputCount(u32),

    #[error("Invalid output node count: {0}")]
    InvalidOutputCount(u32),

    #[error("Cyclic graph detected")]
    CyclicGraph,

    #[error("Missing node")]
    MissingNode(String),
}

impl Serialize for DecisionGraphValidationError {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        let mut map = serializer.serialize_map(None)?;

        match &self {
            DecisionGraphValidationError::InvalidInputCount(count) => {
                map.serialize_entry("type", "invalidInputCount")?;
                map.serialize_entry("nodeCount", count)?;
            }
            DecisionGraphValidationError::InvalidOutputCount(count) => {
                map.serialize_entry("type", "invalidOutputCount")?;
                map.serialize_entry("nodeCount", count)?;
            }
            DecisionGraphValidationError::MissingNode(node_id) => {
                map.serialize_entry("type", "missingNode")?;
                map.serialize_entry("nodeId", node_id)?;
            }
            DecisionGraphValidationError::CyclicGraph => {
                map.serialize_entry("type", "cyclicGraph")?;
            }
        }

        map.end()
    }
}