From f76b2a6e62c8cb8f330864d3f062cf0933d023cb Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Thu, 14 May 2026 20:01:10 +0900
Subject: feat(port): port GenericRule.php

---
 .../src/dependency_resolver/generic_rule.rs        | 75 ++++++++++++++++++++++
 1 file changed, 75 insertions(+)

(limited to 'crates/shirabe/src/dependency_resolver')

diff --git a/crates/shirabe/src/dependency_resolver/generic_rule.rs b/crates/shirabe/src/dependency_resolver/generic_rule.rs
index 2d46346..8e294c1 100644
--- a/crates/shirabe/src/dependency_resolver/generic_rule.rs
+++ b/crates/shirabe/src/dependency_resolver/generic_rule.rs
@@ -1 +1,76 @@
 //! ref: composer/src/Composer/DependencyResolver/GenericRule.php
+
+use anyhow::Result;
+use shirabe_php_shim::{hash_raw, implode, unpack, RuntimeException, PHP_VERSION_ID};
+use crate::dependency_resolver::rule::Rule;
+
+pub struct GenericRule {
+    inner: Rule,
+    pub(crate) literals: Vec<i64>,
+}
+
+impl GenericRule {
+    pub fn new(mut literals: Vec<i64>, reason: shirabe_php_shim::PhpMixed, reason_data: shirabe_php_shim::PhpMixed) -> Self {
+        let inner = Rule::new(reason, reason_data);
+        literals.sort();
+        Self { inner, literals }
+    }
+
+    pub fn get_literals(&self) -> &Vec<i64> {
+        &self.literals
+    }
+
+    pub fn get_hash(&self) -> Result<i64> {
+        let joined = self.literals.iter().map(|l| l.to_string()).collect::<Vec<_>>().join(",");
+        let algo = if PHP_VERSION_ID > 80100 { "xxh3" } else { "sha1" };
+        let binary = hash_raw(algo, &joined);
+        let data = unpack("ihash", &binary);
+        match data {
+            Some(map) => {
+                if let Some(val) = map.get("hash") {
+                    Ok(val.as_int().unwrap_or(0))
+                } else {
+                    Err(RuntimeException {
+                        message: format!("Failed unpacking: {}", joined),
+                        code: 0,
+                    }.into())
+                }
+            }
+            None => Err(RuntimeException {
+                message: format!("Failed unpacking: {}", joined),
+                code: 0,
+            }.into()),
+        }
+    }
+
+    pub fn equals(&self, rule: &dyn RuleLiterals) -> bool {
+        self.literals == *rule.get_literals()
+    }
+
+    pub fn is_assertion(&self) -> bool {
+        self.literals.len() == 1
+    }
+
+    pub fn to_string(&self) -> String {
+        let prefix = if self.inner.is_disabled() { "disabled(" } else { "(" };
+        let mut result = prefix.to_string();
+        for (i, literal) in self.literals.iter().enumerate() {
+            if i != 0 {
+                result.push('|');
+            }
+            result.push_str(&literal.to_string());
+        }
+        result.push(')');
+        result
+    }
+}
+
+pub trait RuleLiterals {
+    fn get_literals(&self) -> &Vec<i64>;
+}
+
+impl RuleLiterals for GenericRule {
+    fn get_literals(&self) -> &Vec<i64> {
+        &self.literals
+    }
+}
-- 
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