use super::PathInfoService; use crate::{ blobservice::BlobService, directoryservice::DirectoryService, nar::calculate_size_and_sha256, proto, Error, }; use futures::{stream::iter, Stream}; use std::{ collections::HashMap, pin::Pin, sync::{Arc, RwLock}, }; use tonic::async_trait; pub struct MemoryPathInfoService { db: Arc>>, blob_service: Arc, directory_service: Arc, } impl MemoryPathInfoService { pub fn new( blob_service: Arc, directory_service: Arc, ) -> Self { Self { db: Default::default(), blob_service, directory_service, } } } #[async_trait] impl PathInfoService for MemoryPathInfoService { /// Constructs a [MemoryPathInfoService] from the passed [url::Url]: /// - scheme has to be `memory://` /// - there may not be a host. /// - there may not be a path. fn from_url( url: &url::Url, blob_service: Arc, directory_service: Arc, ) -> Result { if url.scheme() != "memory" { return Err(crate::Error::StorageError("invalid scheme".to_string())); } if url.has_host() || !url.path().is_empty() { return Err(crate::Error::StorageError("invalid url".to_string())); } Ok(Self::new(blob_service, directory_service)) } async fn get(&self, digest: [u8; 20]) -> Result, Error> { let db = self.db.read().unwrap(); match db.get(&digest) { None => Ok(None), Some(path_info) => Ok(Some(path_info.clone())), } } async fn put(&self, path_info: proto::PathInfo) -> Result { // Call validate on the received PathInfo message. match path_info.validate() { Err(e) => Err(Error::InvalidRequest(format!( "failed to validate PathInfo: {}", e ))), // In case the PathInfo is valid, and we were able to extract a NixPath, store it in the database. // This overwrites existing PathInfo objects. Ok(nix_path) => { let mut db = self.db.write().unwrap(); db.insert(nix_path.digest, path_info.clone()); Ok(path_info) } } } async fn calculate_nar(&self, root_node: &proto::node::Node) -> Result<(u64, [u8; 32]), Error> { calculate_size_and_sha256( root_node, self.blob_service.clone(), self.directory_service.clone(), ) .await .map_err(|e| Error::StorageError(e.to_string())) } fn list(&self) -> Pin> + Send>> { let db = self.db.read().unwrap(); // Copy all elements into a list. // This is a bit ugly, because we can't have db escape the lifetime // of this function, but elements need to be returned owned anyways, and this in- // memory impl is only for testing purposes anyways. let items: Vec<_> = db.iter().map(|(_k, v)| Ok(v.clone())).collect(); Box::pin(iter(items)) } } #[cfg(test)] mod tests { use crate::tests::utils::gen_blob_service; use crate::tests::utils::gen_directory_service; use super::MemoryPathInfoService; use super::PathInfoService; /// This uses a wrong scheme. #[test] fn test_invalid_scheme() { let url = url::Url::parse("http://foo.example/test").expect("must parse"); assert!( MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service()) .is_err() ); } /// This correctly sets the scheme, and doesn't set a path. #[test] fn test_valid_scheme() { let url = url::Url::parse("memory://").expect("must parse"); assert!( MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service()) .is_ok() ); } /// This sets the host to `foo` #[test] fn test_invalid_host() { let url = url::Url::parse("memory://foo").expect("must parse"); assert!( MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service()) .is_err() ); } /// This has the path "/", which is invalid. #[test] fn test_invalid_has_path() { let url = url::Url::parse("memory:///").expect("must parse"); assert!( MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service()) .is_err() ); } /// This has the path "/foo", which is invalid. #[test] fn test_invalid_path2() { let url = url::Url::parse("memory:///foo").expect("must parse"); assert!( MemoryPathInfoService::from_url(&url, gen_blob_service(), gen_directory_service()) .is_err() ); } }