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//! ref: composer/vendor/composer/semver/src/CompilingMatcher.php
use std::sync::Mutex;
use std::sync::OnceLock;
use indexmap::IndexMap;
use crate::constraint::Constraint;
use crate::constraint::ConstraintInterface;
static COMPILED_CHECKER_CACHE: OnceLock<
Mutex<IndexMap<String, Box<dyn Fn(String, bool) -> bool + Send + Sync>>>,
> = OnceLock::new();
static RESULT_CACHE: OnceLock<Mutex<IndexMap<String, bool>>> = OnceLock::new();
// Rust does not support eval(), so the compiled checker path is always disabled.
// The COMPILED_CHECKER_CACHE is retained structurally but never populated.
static TRANS_OP_INT: &[(i64, &str)] = &[
(Constraint::OP_EQ, Constraint::STR_OP_EQ),
(Constraint::OP_LT, Constraint::STR_OP_LT),
(Constraint::OP_LE, Constraint::STR_OP_LE),
(Constraint::OP_GT, Constraint::STR_OP_GT),
(Constraint::OP_GE, Constraint::STR_OP_GE),
(Constraint::OP_NE, Constraint::STR_OP_NE),
];
pub struct CompilingMatcher;
impl CompilingMatcher {
fn compiled_checker_cache()
-> &'static Mutex<IndexMap<String, Box<dyn Fn(String, bool) -> bool + Send + Sync>>> {
COMPILED_CHECKER_CACHE.get_or_init(|| Mutex::new(IndexMap::new()))
}
fn result_cache() -> &'static Mutex<IndexMap<String, bool>> {
RESULT_CACHE.get_or_init(|| Mutex::new(IndexMap::new()))
}
pub fn clear() {
Self::result_cache().lock().unwrap().clear();
Self::compiled_checker_cache().lock().unwrap().clear();
}
pub fn r#match(constraint: &dyn ConstraintInterface, operator: i64, version: String) -> bool {
let result_cache_key = format!("{}{};{}", operator, constraint.__to_string(), version);
{
let cache = Self::result_cache().lock().unwrap();
if let Some(&result) = cache.get(&result_cache_key) {
return result;
}
}
let trans_op = TRANS_OP_INT
.iter()
.find(|(op, _)| *op == operator)
.map(|(_, s)| *s)
.expect("unknown operator");
let result = constraint.matches(&Constraint::new(trans_op.to_string(), version));
Self::result_cache()
.lock()
.unwrap()
.insert(result_cache_key, result);
result
}
}
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