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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use deno_core::resolve_import;use deno_core::ModuleSpecifier;use deno_graph::source::ResolveResponse;use deno_graph::source::Resolver;use import_map::ImportMap;use std::sync::Arc;
/// Wraps an import map to be used when building a deno_graph module graph./// This is done to avoid having `import_map` be a direct dependency of/// `deno_graph`.#[derive(Debug, Clone)]pub struct ImportMapResolver(Arc<ImportMap>);
impl ImportMapResolver {  pub fn new(import_map: Arc<ImportMap>) -> Self {    Self(import_map)  }
  pub fn as_resolver(&self) -> &dyn Resolver {    self  }}
impl Resolver for ImportMapResolver {  fn resolve(    &self,    specifier: &str,    referrer: &ModuleSpecifier,  ) -> ResolveResponse {    match self.0.resolve(specifier, referrer) {      Ok(specifier) => ResolveResponse::Specifier(specifier),      Err(err) => ResolveResponse::Err(err.into()),    }  }}
#[derive(Debug, Default, Clone)]pub struct JsxResolver {  jsx_import_source_module: String,  maybe_import_map_resolver: Option<ImportMapResolver>,}
impl JsxResolver {  pub fn new(    jsx_import_source_module: String,    maybe_import_map_resolver: Option<ImportMapResolver>,  ) -> Self {    Self {      jsx_import_source_module,      maybe_import_map_resolver,    }  }
  pub fn as_resolver(&self) -> &dyn Resolver {    self  }}
impl Resolver for JsxResolver {  fn jsx_import_source_module(&self) -> &str {    self.jsx_import_source_module.as_str()  }
  fn resolve(    &self,    specifier: &str,    referrer: &ModuleSpecifier,  ) -> ResolveResponse {    self.maybe_import_map_resolver.as_ref().map_or_else(      || match resolve_import(specifier, referrer.as_str()) {        Ok(specifier) => ResolveResponse::Specifier(specifier),        Err(err) => ResolveResponse::Err(err.into()),      },      |r| r.resolve(specifier, referrer),    )  }}