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|
use anyhow::Result;
use tracing::warn;
use warden_core::{configuration::typology::TypologyConfiguration, message::TypologyResult};
pub(super) fn evaluate_expression(
typology_result: &mut TypologyResult,
typology_config: &TypologyConfiguration,
) -> Result<f64> {
let mut to_return = 0.0;
let expression = typology_config
.expression
.as_ref()
.expect("expression is missing");
let rule_values = &typology_config.rules;
for rule in expression.terms.iter() {
let rule_result = typology_result
.rule_results
.iter()
.find(|value| value.id.eq(&rule.id) && value.version.eq(&rule.version));
if rule_result.is_none() {
warn!(term = ?rule, "could not find rule result for typology term");
return Ok(Default::default());
}
let rule_result = rule_result.expect("checked and is some");
let weight = rule_values
.iter()
.filter_map(|rv| {
if !(rv.id.eq(&rule_result.id) && rv.version.eq(&rule_result.version)) {
None
} else {
rv.wghts.iter().find_map(|value| {
match value.r#ref.eq(&rule_result.sub_rule_ref) {
true => Some(value.wght),
false => None,
}
})
}
})
.next();
if weight.is_none() {
warn!(rule = ?rule, "could not find a weight for the matching rule");
}
let weight = weight.unwrap_or_default();
to_return = match expression.operator() {
warden_core::configuration::typology::Operator::Add => to_return + weight,
warden_core::configuration::typology::Operator::Multiply => to_return * weight,
warden_core::configuration::typology::Operator::Subtract => to_return - weight,
warden_core::configuration::typology::Operator::Divide => {
if weight.ne(&0.0) {
to_return / weight
} else {
to_return
}
}
};
}
Ok(to_return)
}
#[cfg(test)]
mod tests {
use warden_core::{
configuration::typology::{Expression, Operator, Term, TypologyRule, TypologyRuleWeight},
message::RuleResult,
};
use super::*;
fn make_rule_result(id: &str, version: &str, sub_ref: &str) -> RuleResult {
RuleResult {
id: id.to_string(),
version: version.to_string(),
sub_rule_ref: sub_ref.to_string(),
..Default::default()
}
}
fn make_rule_value(id: &str, version: &str, ref_name: &str, weight: f64) -> TypologyRule {
TypologyRule {
id: id.to_string(),
version: version.to_string(),
wghts: vec![TypologyRuleWeight {
r#ref: ref_name.to_string(),
wght: weight,
}],
}
}
fn make_expression(terms: Vec<(&str, &str)>, op: Operator) -> Expression {
Expression {
terms: terms
.into_iter()
.map(|(id, version)| Term {
id: id.to_string(),
version: version.to_string(),
})
.collect(),
operator: op.into(),
}
}
#[test]
fn test_add_operator_multiple_terms() {
let mut typology_result = TypologyResult {
rule_results: vec![
make_rule_result("R1", "v1", "sub1"),
make_rule_result("R2", "v1", "sub2"),
],
..Default::default()
};
let config = TypologyConfiguration {
expression: Some(make_expression(
vec![("R1", "v1"), ("R2", "v1")],
Operator::Add,
)),
rules: vec![
make_rule_value("R1", "v1", "sub1", 10.0),
make_rule_value("R2", "v1", "sub2", 5.0),
],
..Default::default()
};
let result = evaluate_expression(&mut typology_result, &config).unwrap();
assert_eq!(result, 15.0);
}
#[test]
fn test_missing_rule_result_returns_zero() {
let mut typology_result = TypologyResult {
rule_results: vec![make_rule_result("R1", "v1", "sub1")],
..Default::default()
};
let config = TypologyConfiguration {
expression: Some(make_expression(
vec![("R1", "v1"), ("R2", "v1")],
Operator::Add,
)),
rules: vec![make_rule_value("R1", "v1", "sub1", 10.0)],
..Default::default()
};
let result = evaluate_expression(&mut typology_result, &config).unwrap();
assert_eq!(result, 0.0);
}
#[test]
fn test_missing_weight_defaults_to_zero() {
let mut typology_result = TypologyResult {
rule_results: vec![make_rule_result("R1", "v1", "subX")], // sub_ref doesn't match
..Default::default()
};
let config = TypologyConfiguration {
expression: Some(make_expression(vec![("R1", "v1")], Operator::Add)),
rules: vec![make_rule_value("R1", "v1", "sub1", 10.0)], // different ref
..Default::default()
};
let result = evaluate_expression(&mut typology_result, &config).unwrap();
assert_eq!(result, 0.0);
}
}
|
