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/*
* Copyright (c) 2022, networkException <networkexception@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/ModuleRequest.h>
#include <LibWeb/HTML/Scripting/Environments.h>
#include <LibWeb/HTML/Scripting/Fetching.h>
#include <LibWeb/HTML/Scripting/ModuleScript.h>
#include <LibWeb/WebIDL/DOMException.h>
#include <LibWeb/WebIDL/ExceptionOr.h>
namespace Web::HTML {
ModuleScript::~ModuleScript() = default;
ModuleScript::ModuleScript(AK::URL base_url, DeprecatedString filename, EnvironmentSettingsObject& environment_settings_object)
: Script(move(base_url), move(filename), environment_settings_object)
{
}
JavaScriptModuleScript::~JavaScriptModuleScript() = default;
JavaScriptModuleScript::JavaScriptModuleScript(AK::URL base_url, DeprecatedString filename, EnvironmentSettingsObject& environment_settings_object)
: ModuleScript(move(base_url), move(filename), environment_settings_object)
{
}
// https://html.spec.whatwg.org/multipage/webappapis.html#creating-a-javascript-module-script
JS::GCPtr<JavaScriptModuleScript> JavaScriptModuleScript::create(DeprecatedString const& filename, StringView source, EnvironmentSettingsObject& settings_object, AK::URL base_url)
{
// 1. If scripting is disabled for settings, then set source to the empty string.
if (settings_object.is_scripting_disabled())
source = ""sv;
auto& realm = settings_object.realm();
// 2. Let script be a new module script that this algorithm will subsequently initialize.
auto* script = realm.heap().allocate<JavaScriptModuleScript>(realm, move(base_url), filename, settings_object);
// 3. Set script's settings object to settings.
// NOTE: This was already done when constructing.
// 4. Set script's base URL to baseURL.
// NOTE: This was already done when constructing.
// FIXME: 5. Set script's fetch options to options.
// 6. Set script's parse error and error to rethrow to null.
// NOTE: Parse error and error to rethrow were set to null in the construction of Script.
// 7. Let result be ParseModule(source, settings's Realm, script).
auto result = JS::SourceTextModule::parse(source, settings_object.realm(), filename.view(), script);
// 8. If result is a list of errors, then:
if (result.is_error()) {
auto& parse_error = result.error().first();
dbgln("JavaScriptModuleScript: Failed to parse: {}", parse_error.to_deprecated_string());
// FIXME: 1. Set script's parse error to result[0].
// 2. Return script.
return script;
}
// 10. For each ModuleRequest record requested of result.[[RequestedModules]]:
for (auto const& requested : result.value()->requested_modules()) {
// FIXME: Clarify if this should be checked for all requested before running the steps below.
// 9. Assert: requested.[[Assertions]] does not contain any Record entry such that entry.[[Key]] is not "type",
// because we only asked for "type" assertions in HostGetSupportedImportAssertions.
VERIFY(all_of(requested.assertions, [](auto const& assertion) { return assertion.key == "type"sv; }));
// 1. Let url be the result of resolving a module specifier given script and requested.[[Specifier]], catching any exceptions.
auto url = resolve_module_specifier(*script, requested.module_specifier);
// 2. If the previous step threw an exception, then:
if (url.is_exception()) {
// FIXME: 1. Set script's parse error to that exception.
// 2. Return script.
return script;
}
// 3. Let moduleType be the result of running the module type from module request steps given requested.
auto module_type = module_type_from_module_request(requested);
// 4. If the result of running the module type allowed steps given moduleType and settings is false, then:
if (!settings_object.module_type_allowed(module_type)) {
// FIXME: 1. Let error be a new TypeError exception.
// FIXME: 2. Set script's parse error to error.
// 3. Return script.
return script;
}
}
// 11. Set script's record to result.
script->m_record = result.value();
// 12. Return script.
return script;
}
// https://html.spec.whatwg.org/multipage/webappapis.html#run-a-module-script
JS::Promise* JavaScriptModuleScript::run(PreventErrorReporting)
{
// 1. Let settings be the settings object of script.
auto& settings = settings_object();
// 2. Check if we can run script with settings. If this returns "do not run", then return a promise resolved with undefined.
if (settings.can_run_script() == RunScriptDecision::DoNotRun) {
auto promise = JS::Promise::create(settings.realm());
promise->fulfill(JS::js_undefined());
return promise;
}
// 3. Prepare to run script given settings.
settings.prepare_to_run_script();
// 4. Let evaluationPromise be null.
JS::Promise* evaluation_promise = nullptr;
// FIXME: 5. If script's error to rethrow is not null, then set evaluationPromise to a promise rejected with script's error to rethrow.
// 6. Otherwise:
if (m_record) {
// 1. Let record be script's record.
auto record = m_record;
auto interpreter = JS::Interpreter::create_with_existing_realm(settings.realm());
JS::VM::InterpreterExecutionScope scope(*interpreter);
// 2. Set evaluationPromise to record.Evaluate().
auto elevation_promise_or_error = record->evaluate(vm());
// NOTE: This step will recursively evaluate all of the module's dependencies.
// If Evaluate fails to complete as a result of the user agent aborting the running script,
// then set evaluationPromise to a promise rejected with a new "QuotaExceededError" DOMException.
if (elevation_promise_or_error.is_error()) {
auto promise = JS::Promise::create(settings_object().realm());
promise->reject(WebIDL::QuotaExceededError::create(settings_object().realm(), "Failed to evaluate module script").ptr());
evaluation_promise = promise;
} else {
evaluation_promise = elevation_promise_or_error.value();
}
} else {
TODO();
}
// FIXME: 7. If preventErrorReporting is false, then upon rejection of evaluationPromise with reason, report the exception given by reason for script.
// 8. Clean up after running script with settings.
settings.clean_up_after_running_script();
// 9. Return evaluationPromise.
return evaluation_promise;
}
void JavaScriptModuleScript::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_record);
}
}
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