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/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/DeprecatedString.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/HTML/Storage.h>
namespace Web::HTML {
WebIDL::ExceptionOr<JS::NonnullGCPtr<Storage>> Storage::create(JS::Realm& realm)
{
return MUST_OR_THROW_OOM(realm.heap().allocate<Storage>(realm, realm));
}
Storage::Storage(JS::Realm& realm)
: Bindings::LegacyPlatformObject(realm)
{
}
Storage::~Storage() = default;
JS::ThrowCompletionOr<void> Storage::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Base::initialize(realm));
set_prototype(&Bindings::ensure_web_prototype<Bindings::StoragePrototype>(realm, "Storage"));
return {};
}
// https://html.spec.whatwg.org/multipage/webstorage.html#dom-storage-length
size_t Storage::length() const
{
// The length getter steps are to return this's map's size.
return m_map.size();
}
// https://html.spec.whatwg.org/multipage/webstorage.html#dom-storage-key
DeprecatedString Storage::key(size_t index)
{
// 1. If index is greater than or equal to this's map's size, then return null.
if (index >= m_map.size())
return {};
// 2. Let keys be the result of running get the keys on this's map.
auto keys = m_map.keys();
// 3. Return keys[index].
return keys[index];
}
// https://html.spec.whatwg.org/multipage/webstorage.html#dom-storage-getitem
DeprecatedString Storage::get_item(DeprecatedString const& key) const
{
// 1. If this's map[key] does not exist, then return null.
auto it = m_map.find(key);
if (it == m_map.end())
return {};
// 2. Return this's map[key].
return it->value;
}
// https://html.spec.whatwg.org/multipage/webstorage.html#dom-storage-setitem
WebIDL::ExceptionOr<void> Storage::set_item(DeprecatedString const& key, DeprecatedString const& value)
{
// 1. Let oldValue be null.
DeprecatedString old_value;
// 2. Let reorder be true.
bool reorder = true;
// 3. If this's map[key] exists:
if (auto it = m_map.find(key); it != m_map.end()) {
// 1. Set oldValue to this's map[key].
old_value = it->value;
// 2. If oldValue is value, then return.
if (old_value == value)
return {};
// 3. Set reorder to false.
reorder = false;
}
// FIXME: 4. If value cannot be stored, then throw a "QuotaExceededError" DOMException exception.
// 5. Set this's map[key] to value.
m_map.set(key, value);
// 6. If reorder is true, then reorder this.
if (reorder)
this->reorder();
// 7. Broadcast this with key, oldValue, and value.
broadcast(key, old_value, value);
return {};
}
// https://html.spec.whatwg.org/multipage/webstorage.html#dom-storage-removeitem
void Storage::remove_item(DeprecatedString const& key)
{
// 1. If this's map[key] does not exist, then return null.
// FIXME: Return null?
auto it = m_map.find(key);
if (it == m_map.end())
return;
// 2. Set oldValue to this's map[key].
auto old_value = it->value;
// 3. Remove this's map[key].
m_map.remove(it);
// 4. Reorder this.
reorder();
// 5. Broadcast this with key, oldValue, and null.
broadcast(key, old_value, {});
}
// https://html.spec.whatwg.org/multipage/webstorage.html#dom-storage-clear
void Storage::clear()
{
// 1. Clear this's map.
m_map.clear();
// 2. Broadcast this with null, null, and null.
broadcast({}, {}, {});
}
// https://html.spec.whatwg.org/multipage/webstorage.html#concept-storage-reorder
void Storage::reorder()
{
// To reorder a Storage object storage, reorder storage's map's entries in an implementation-defined manner.
// NOTE: This basically means that we're not required to maintain any particular iteration order.
}
// https://html.spec.whatwg.org/multipage/webstorage.html#concept-storage-broadcast
void Storage::broadcast(DeprecatedString const& key, DeprecatedString const& old_value, DeprecatedString const& new_value)
{
(void)key;
(void)old_value;
(void)new_value;
// FIXME: Implement.
}
Vector<DeprecatedString> Storage::supported_property_names() const
{
// The supported property names on a Storage object storage are the result of running get the keys on storage's map.
return m_map.keys();
}
WebIDL::ExceptionOr<JS::Value> Storage::named_item_value(DeprecatedFlyString const& name) const
{
auto value = get_item(name);
if (value.is_null())
return JS::js_null();
return JS::PrimitiveString::create(vm(), value);
}
WebIDL::ExceptionOr<Bindings::LegacyPlatformObject::DidDeletionFail> Storage::delete_value(DeprecatedString const& name)
{
remove_item(name);
return DidDeletionFail::NotRelevant;
}
WebIDL::ExceptionOr<void> Storage::set_value_of_named_property(DeprecatedString const& key, JS::Value unconverted_value)
{
// NOTE: Since LegacyPlatformObject does not know the type of value, we must convert it ourselves.
// The type of `value` is `DOMString`.
auto value = TRY(unconverted_value.to_deprecated_string(vm()));
return set_item(key, value);
}
void Storage::dump() const
{
dbgln("Storage ({} key(s))", m_map.size());
size_t i = 0;
for (auto const& it : m_map) {
dbgln("[{}] \"{}\": \"{}\"", i, it.key, it.value);
++i;
}
}
}
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