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use async_trait::async_trait;
use camino::{Utf8Path, Utf8PathBuf};
use std::collections::HashSet;
use thiserror::Error;
use super::DependencyCollection;
#[derive(Error, Debug)]
pub enum ParserError {
#[error("File not found: {0}")]
FileNotFound(Utf8PathBuf),
#[error("Parse error: {0}")]
ParseError(String),
#[error("IO error: {0}")]
IoError(#[from] std::io::Error),
#[error("JSON error: {0}")]
JsonError(#[from] serde_json::Error),
#[error("YAML error: {0}")]
YamlError(#[from] serde_yaml::Error),
#[error("XML error: {0}")]
XmlError(String),
#[error("Unsupported file format: {0}")]
UnsupportedFormat(String),
}
pub type ParserResult<T> = Result<T, ParserError>;
#[async_trait]
pub trait Parser: Send + Sync {
/// Returns true if this parser can handle the given file
fn can_parse(&self, path: &Utf8Path) -> bool;
/// Parse the file and return dependencies
async fn parse(&self, path: &Utf8Path) -> ParserResult<DependencyCollection>;
/// Return the name of this parser
fn name(&self) -> &'static str;
/// Return file patterns this parser supports
fn file_patterns(&self) -> Vec<&'static str>;
}
pub struct ParserRegistry {
parsers: Vec<Box<dyn Parser>>,
}
impl ParserRegistry {
pub fn new() -> Self {
Self {
parsers: Vec::new(),
}
}
pub fn register<P: Parser + 'static>(&mut self, parser: P) {
self.parsers.push(Box::new(parser));
}
pub fn find_parser(&self, path: &Utf8Path) -> Option<&dyn Parser> {
self.parsers
.iter()
.find(|parser| parser.can_parse(path))
.map(|parser| parser.as_ref())
}
pub async fn parse_file(&self, path: &Utf8Path) -> ParserResult<DependencyCollection> {
match self.find_parser(path) {
Some(parser) => parser.parse(path).await,
None => Err(ParserError::UnsupportedFormat(path.to_string())),
}
}
pub fn supported_files(&self) -> Vec<&'static str> {
let mut patterns = HashSet::new();
for parser in &self.parsers {
for pattern in parser.file_patterns() {
patterns.insert(pattern);
}
}
let mut result: Vec<&'static str> = patterns.into_iter().collect();
result.sort();
result
}
pub fn parsers(&self) -> &[Box<dyn Parser>] {
&self.parsers
}
}
impl Default for ParserRegistry {
fn default() -> Self {
Self::new()
}
}
/// Utility functions for parsers
pub mod utils {
use super::*;
use std::fs;
pub async fn read_file_to_string(path: &Utf8Path) -> ParserResult<String> {
if !path.exists() {
return Err(ParserError::FileNotFound(path.to_path_buf()));
}
let content = tokio::fs::read_to_string(path).await?;
Ok(content)
}
pub fn read_file_to_string_sync(path: &Utf8Path) -> ParserResult<String> {
if !path.exists() {
return Err(ParserError::FileNotFound(path.to_path_buf()));
}
let content = fs::read_to_string(path)?;
Ok(content)
}
pub fn matches_pattern(filename: &str, pattern: &str) -> bool {
match pattern {
"*" => true,
pattern if pattern.contains('*') => {
let regex_pattern = pattern.replace("*", ".*");
regex::Regex::new(®ex_pattern)
.map(|re| re.is_match(filename))
.unwrap_or(false)
}
pattern => filename == pattern,
}
}
pub fn extract_filename(path: &Utf8Path) -> Option<&str> {
path.file_name()
}
pub fn normalize_version(version: &str) -> String {
// Remove common version prefixes
let version = version.trim_start_matches("v");
let version = version.trim_start_matches("=");
let version = version.trim_start_matches("==");
let version = version.trim_start_matches("~");
let version = version.trim_start_matches("^");
let version = version.trim_start_matches(">=");
let version = version.trim_start_matches("<=");
let version = version.trim_start_matches(">");
let version = version.trim_start_matches("<");
version.trim().to_string()
}
pub fn sanitize_package_name(name: &str) -> String {
name.trim().to_lowercase()
}
}
#[cfg(test)]
mod tests {
use super::*;
use super::utils::*;
#[test]
fn test_matches_pattern() {
assert!(matches_pattern("Gemfile.lock", "Gemfile.lock"));
assert!(matches_pattern("package.json", "package.json"));
assert!(matches_pattern("yarn.lock", "*.lock"));
assert!(matches_pattern("Pipfile.lock", "Pipfile*"));
assert!(!matches_pattern("random.txt", "*.lock"));
}
#[test]
fn test_normalize_version() {
assert_eq!(normalize_version("v1.0.0"), "1.0.0");
assert_eq!(normalize_version("==1.0.0"), "1.0.0");
assert_eq!(normalize_version("~1.0.0"), "1.0.0");
assert_eq!(normalize_version("^1.0.0"), "1.0.0");
assert_eq!(normalize_version(">=1.0.0"), "1.0.0");
assert_eq!(normalize_version("1.0.0"), "1.0.0");
}
#[test]
fn test_sanitize_package_name() {
assert_eq!(sanitize_package_name(" Package-Name "), "package-name");
assert_eq!(sanitize_package_name("PACKAGE"), "package");
}
#[tokio::test]
async fn test_parser_registry() {
let registry = ParserRegistry::new();
assert!(registry.parsers().is_empty());
assert!(registry.supported_files().is_empty());
}
}
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