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use elsa::FrozenMap;
/// Stores some parsed AST representation of the file
#[derive(Debug)]
pub struct FluentResource<'mgr>(&'mgr str);
impl<'mgr> FluentResource<'mgr> {
pub fn new(s: &'mgr str) -> Self {
// very simple parse step
FluentResource(&s[0..1])
}
}
/// Stores loaded files and parsed ASTs
///
/// Parsed ASTs are zero-copy and
/// contain references to the files
pub struct ResourceManager<'mgr> {
strings: FrozenMap<String, String>,
resources: FrozenMap<String, Box<FluentResource<'mgr>>>,
}
impl<'mgr> ResourceManager<'mgr> {
pub fn new() -> Self {
ResourceManager {
strings: FrozenMap::new(),
resources: FrozenMap::new(),
}
}
pub fn get_resource(&'mgr self, path: &str) -> &'mgr FluentResource<'mgr> {
let strings = &self.strings;
if strings.get(path).is_some() {
return self.resources.get(path).unwrap();
} else {
// pretend to load a file
let string = format!("file for {}", path);
let val = self.strings.insert(path.to_string(), string);
let res = FluentResource::new(val);
self.resources.insert(path.to_string(), Box::new(res))
}
}
}
fn main() {
let manager = ResourceManager::new();
let resource = manager.get_resource("somefile.ftl");
println!("{:?}", resource);
}
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