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use rustc_hash::FxHashSet;
use relative_path::{RelativePath, RelativePathBuf};
use crate::{FileId, FileResolver, SourceRoot};
#[derive(Default, Debug, Clone)]
pub struct FileMap(Vec<(FileId, RelativePathBuf)>);
impl FileMap {
pub fn add(&mut self, path: RelativePathBuf) -> FileId {
let file_id = FileId((self.0.len() + 1) as u32);
self.0.push((file_id, path));
file_id
}
pub fn into_source_root(self) -> SourceRoot {
let files = self.files();
SourceRoot { files }
}
pub fn files(&self) -> FxHashSet<FileId> {
self.iter().map(|(id, _)| id).collect()
}
pub fn file_id(&self, path: &str) -> FileId {
assert!(path.starts_with('/'));
self.iter().find(|(_, p)| p == &path[1..]).unwrap().0
}
fn iter<'a>(&'a self) -> impl Iterator<Item = (FileId, &'a RelativePath)> + 'a {
self.0
.iter()
.map(|(id, path)| (*id, path.as_relative_path()))
}
fn path(&self, id: FileId) -> &RelativePath {
self.iter().find(|&(it, _)| it == id).unwrap().1
}
}
impl FileResolver for FileMap {
fn file_stem(&self, id: FileId) -> String {
self.path(id).file_stem().unwrap().to_string()
}
fn resolve(&self, id: FileId, rel: &RelativePath) -> Option<FileId> {
let path = self.path(id).join(rel).normalize();
let id = self.iter().find(|&(_, p)| path == p)?.0;
Some(id)
}
}
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