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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use crate::global_state::GlobalState;
use crate::import_map::ImportMap;
use crate::permissions::Permissions;
use crate::tsc::TargetLib;
use deno_core::error::AnyError;
use deno_core::futures::future::FutureExt;
use deno_core::futures::Future;
use deno_core::ModuleLoadId;
use deno_core::ModuleLoader;
use deno_core::ModuleSpecifier;
use deno_core::OpState;
use std::cell::RefCell;
use std::pin::Pin;
use std::rc::Rc;
use std::str;
use std::sync::Arc;
pub struct CliModuleLoader {
/// When flags contains a `.import_map_path` option, the content of the
/// import map file will be resolved and set.
pub import_map: Option<ImportMap>,
pub target_lib: TargetLib,
pub is_main: bool,
}
impl CliModuleLoader {
pub fn new(maybe_import_map: Option<ImportMap>) -> Rc<Self> {
Rc::new(CliModuleLoader {
import_map: maybe_import_map,
target_lib: TargetLib::Main,
is_main: true,
})
}
pub fn new_for_worker() -> Rc<Self> {
Rc::new(CliModuleLoader {
import_map: None,
target_lib: TargetLib::Worker,
is_main: false,
})
}
}
impl ModuleLoader for CliModuleLoader {
fn resolve(
&self,
specifier: &str,
referrer: &str,
is_main: bool,
) -> Result<ModuleSpecifier, AnyError> {
if !is_main {
if let Some(import_map) = &self.import_map {
let result = import_map.resolve(specifier, referrer)?;
if let Some(r) = result {
return Ok(r);
}
}
}
let module_specifier =
ModuleSpecifier::resolve_import(specifier, referrer)?;
Ok(module_specifier)
}
fn load(
&self,
op_state: Rc<RefCell<OpState>>,
module_specifier: &ModuleSpecifier,
maybe_referrer: Option<ModuleSpecifier>,
_is_dyn_import: bool,
) -> Pin<Box<deno_core::ModuleSourceFuture>> {
let module_specifier = module_specifier.to_owned();
let module_url_specified = module_specifier.to_string();
let global_state = {
let state = op_state.borrow();
state.borrow::<Arc<GlobalState>>().clone()
};
// TODO(bartlomieju): `fetch_compiled_module` should take `load_id` param
let fut = async move {
let compiled_module = global_state
.fetch_compiled_module(module_specifier, maybe_referrer)
.await?;
Ok(deno_core::ModuleSource {
// Real module name, might be different from initial specifier
// due to redirections.
code: compiled_module.code,
module_url_specified,
module_url_found: compiled_module.name,
})
};
fut.boxed_local()
}
fn prepare_load(
&self,
op_state: Rc<RefCell<OpState>>,
_load_id: ModuleLoadId,
module_specifier: &ModuleSpecifier,
maybe_referrer: Option<String>,
is_dyn_import: bool,
) -> Pin<Box<dyn Future<Output = Result<(), AnyError>>>> {
let module_specifier = module_specifier.clone();
let target_lib = self.target_lib.clone();
let maybe_import_map = self.import_map.clone();
let state = op_state.borrow();
// Only "main" module is loaded without permission check,
// ie. module that is associated with "is_main" state
// and is not a dynamic import.
let permissions = if self.is_main && !is_dyn_import {
Permissions::allow_all()
} else {
state.borrow::<Permissions>().clone()
};
let global_state = state.borrow::<Arc<GlobalState>>().clone();
drop(state);
// TODO(bartlomieju): I'm not sure if it's correct to ignore
// bad referrer - this is the case for `Deno.core.evalContext()` where
// `ref_str` is `<unknown>`.
let maybe_referrer = if let Some(ref_str) = maybe_referrer {
ModuleSpecifier::resolve_url(&ref_str).ok()
} else {
None
};
// TODO(bartlomieju): `prepare_module_load` should take `load_id` param
async move {
global_state
.prepare_module_load(
module_specifier,
maybe_referrer,
target_lib,
permissions,
is_dyn_import,
maybe_import_map,
)
.await
}
.boxed_local()
}
}
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