339 lines
13 KiB
C++
339 lines
13 KiB
C++
////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2016 Realm Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////
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#pragma once
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#include "js_collection.hpp"
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#include "js_object_accessor.hpp"
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#include "js_realm_object.hpp"
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#include "js_results.hpp"
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#include "js_types.hpp"
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#include "js_util.hpp"
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#include "shared_realm.hpp"
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#include "list.hpp"
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#include "parser.hpp"
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#include "query_builder.hpp"
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namespace realm {
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namespace js {
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template<typename JSEngine>
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class NativeAccessor;
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template<typename T>
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class List : public realm::List {
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public:
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List(std::shared_ptr<realm::Realm> r, const ObjectSchema& s, LinkViewRef l) noexcept : realm::List(r, l) {}
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List(const realm::List &l) : realm::List(l) {}
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std::vector<std::pair<Protected<typename T::Function>, NotificationToken>> m_notification_tokens;
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};
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template<typename T>
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struct ListClass : ClassDefinition<T, realm::js::List<T>, CollectionClass<T>> {
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using ContextType = typename T::Context;
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using ObjectType = typename T::Object;
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using ValueType = typename T::Value;
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using FunctionType = typename T::Function;
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using Object = js::Object<T>;
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using Value = js::Value<T>;
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using ReturnValue = js::ReturnValue<T>;
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static ObjectType create_instance(ContextType, realm::List);
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// properties
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static void get_length(ContextType, ObjectType, ReturnValue &);
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static void get_index(ContextType, ObjectType, uint32_t, ReturnValue &);
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static bool set_index(ContextType, ObjectType, uint32_t, ValueType);
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// methods
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static void push(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void pop(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void unshift(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void shift(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void splice(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void snapshot(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void filtered(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void sorted(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void is_valid(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void index_of(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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// observable
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static void add_listener(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void remove_listener(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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static void remove_all_listeners(ContextType, FunctionType, ObjectType, size_t, const ValueType[], ReturnValue &);
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std::string const name = "List";
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MethodMap<T> const methods = {
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{"push", wrap<push>},
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{"pop", wrap<pop>},
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{"unshift", wrap<unshift>},
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{"shift", wrap<shift>},
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{"splice", wrap<splice>},
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{"snapshot", wrap<snapshot>},
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{"filtered", wrap<filtered>},
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{"sorted", wrap<sorted>},
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{"isValid", wrap<is_valid>},
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{"indexOf", wrap<index_of>},
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{"addListener", wrap<add_listener>},
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{"removeListener", wrap<remove_listener>},
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{"removeAllListeners", wrap<remove_all_listeners>},
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};
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PropertyMap<T> const properties = {
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{"length", {wrap<get_length>, nullptr}},
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};
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IndexPropertyType<T> const index_accessor = {wrap<get_index>, wrap<set_index>};
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};
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template<typename T>
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typename T::Object ListClass<T>::create_instance(ContextType ctx, realm::List list) {
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return create_object<T, ListClass<T>>(ctx, new realm::js::List<T>(std::move(list)));
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}
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template<typename T>
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void ListClass<T>::get_length(ContextType, ObjectType object, ReturnValue &return_value) {
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auto list = get_internal<T, ListClass<T>>(object);
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return_value.set((uint32_t)list->size());
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}
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template<typename T>
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void ListClass<T>::get_index(ContextType ctx, ObjectType object, uint32_t index, ReturnValue &return_value) {
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auto list = get_internal<T, ListClass<T>>(object);
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auto realm_object = realm::Object(list->get_realm(), list->get_object_schema(), list->get(index));
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return_value.set(RealmObjectClass<T>::create_instance(ctx, std::move(realm_object)));
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}
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template<typename T>
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bool ListClass<T>::set_index(ContextType ctx, ObjectType object, uint32_t index, ValueType value) {
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auto list = get_internal<T, ListClass<T>>(object);
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NativeAccessor<T> accessor(ctx, list->get_realm(), list->get_object_schema());
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list->set(accessor, index, value);
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return true;
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}
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template<typename T>
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void ListClass<T>::push(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count_at_least(argc, 1);
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auto list = get_internal<T, ListClass<T>>(this_object);
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NativeAccessor<T> accessor(ctx, list->get_realm(), list->get_object_schema());
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for (size_t i = 0; i < argc; i++) {
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list->add(accessor, arguments[i]);
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}
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return_value.set((uint32_t)list->size());
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}
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template<typename T>
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void ListClass<T>::pop(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count(argc, 0);
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auto list = get_internal<T, ListClass<T>>(this_object);
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size_t size = list->size();
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if (size == 0) {
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list->verify_in_transaction();
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return_value.set_undefined();
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}
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else {
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size_t index = size - 1;
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auto realm_object = realm::Object(list->get_realm(), list->get_object_schema(), list->get(index));
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return_value.set(RealmObjectClass<T>::create_instance(ctx, std::move(realm_object)));
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list->remove(index);
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}
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}
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template<typename T>
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void ListClass<T>::unshift(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count_at_least(argc, 1);
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auto list = get_internal<T, ListClass<T>>(this_object);
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NativeAccessor<T> accessor(ctx, list->get_realm(), list->get_object_schema());
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for (size_t i = 0; i < argc; i++) {
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list->insert(accessor, i, arguments[i]);
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}
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return_value.set((uint32_t)list->size());
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}
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template<typename T>
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void ListClass<T>::shift(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count(argc, 0);
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auto list = get_internal<T, ListClass<T>>(this_object);
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if (list->size() == 0) {
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list->verify_in_transaction();
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return_value.set_undefined();
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}
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else {
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auto realm_object = realm::Object(list->get_realm(), list->get_object_schema(), list->get(0));
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return_value.set(RealmObjectClass<T>::create_instance(ctx, std::move(realm_object)));
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list->remove(0);
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}
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}
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template<typename T>
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void ListClass<T>::splice(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count_at_least(argc, 1);
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auto list = get_internal<T, ListClass<T>>(this_object);
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size_t size = list->size();
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long index = std::min<long>(Value::to_number(ctx, arguments[0]), size);
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if (index < 0) {
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index = std::max<long>(size + index, 0);
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}
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size_t remove;
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if (argc < 2) {
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remove = size - index;
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}
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else {
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remove = std::max<long>(Value::to_number(ctx, arguments[1]), 0);
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remove = std::min<long>(remove, size - index);
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}
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std::vector<ValueType> removed_objects;
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removed_objects.reserve(remove);
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NativeAccessor<T> accessor(ctx, list->get_realm(), list->get_object_schema());
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for (size_t i = 0; i < remove; i++) {
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auto realm_object = realm::Object(list->get_realm(), list->get_object_schema(), list->get(index));
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removed_objects.push_back(RealmObjectClass<T>::create_instance(ctx, std::move(realm_object)));
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list->remove(index);
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}
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for (size_t i = 2; i < argc; i++) {
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list->insert(accessor, index + i - 2, arguments[i]);
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}
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return_value.set(Object::create_array(ctx, removed_objects));
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}
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template<typename T>
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void ListClass<T>::snapshot(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count(argc, 0);
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auto list = get_internal<T, ListClass<T>>(this_object);
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return_value.set(ResultsClass<T>::create_instance(ctx, list->snapshot()));
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}
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template<typename T>
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void ListClass<T>::filtered(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count_at_least(argc, 1);
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auto list = get_internal<T, ListClass<T>>(this_object);
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return_value.set(ResultsClass<T>::create_filtered(ctx, *list, argc, arguments));
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}
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template<typename T>
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void ListClass<T>::sorted(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count(argc, 1, 2);
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auto list = get_internal<T, ListClass<T>>(this_object);
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return_value.set(ResultsClass<T>::create_sorted(ctx, *list, argc, arguments));
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}
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template<typename T>
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void ListClass<T>::is_valid(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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return_value.set(get_internal<T, ListClass<T>>(this_object)->is_valid());
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}
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template<typename T>
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void ListClass<T>::index_of(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count(argc, 1);
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ObjectType arg = Value::validated_to_object(ctx, arguments[0]);
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if (Object::template is_instance<RealmObjectClass<T>>(ctx, arg)) {
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auto object = get_internal<T, RealmObjectClass<T>>(arg);
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if (!object->is_valid()) {
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throw std::runtime_error("Object is invalid. Either it has been previously deleted or the Realm it belongs to has been closed.");
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}
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auto list = get_internal<T, ListClass<T>>(this_object);
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size_t ndx = list->find(object->row());
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if (ndx == realm::not_found) {
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return_value.set(-1);
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}
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else {
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return_value.set((uint32_t)ndx);
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}
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}
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else {
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return_value.set(-1);
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}
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}
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template<typename T>
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void ListClass<T>::add_listener(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count(argc, 1);
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auto list = get_internal<T, ListClass<T>>(this_object);
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auto callback = Value::validated_to_function(ctx, arguments[0]);
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Protected<FunctionType> protected_callback(ctx, callback);
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Protected<ObjectType> protected_this(ctx, this_object);
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Protected<typename T::GlobalContext> protected_ctx(Context<T>::get_global_context(ctx));
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auto token = list->add_notification_callback([=](CollectionChangeSet change_set, std::exception_ptr exception) {
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HANDLESCOPE
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ValueType arguments[2];
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arguments[0] = static_cast<ObjectType>(protected_this);
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arguments[1] = CollectionClass<T>::create_collection_change_set(protected_ctx, change_set);
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Function<T>::callback(protected_ctx, protected_callback, protected_this, 2, arguments);
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});
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list->m_notification_tokens.emplace_back(protected_callback, std::move(token));
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}
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template<typename T>
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void ListClass<T>::remove_listener(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count(argc, 1);
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auto list = get_internal<T, ListClass<T>>(this_object);
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auto callback = Value::validated_to_function(ctx, arguments[0]);
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auto protected_function = Protected<FunctionType>(ctx, callback);
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auto iter = list->m_notification_tokens.begin();
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typename Protected<FunctionType>::Comparator compare;
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while (iter != list->m_notification_tokens.end()) {
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if(compare(iter->first, protected_function)) {
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iter = list->m_notification_tokens.erase(iter);
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}
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else {
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iter++;
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}
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}
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}
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template<typename T>
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void ListClass<T>::remove_all_listeners(ContextType ctx, FunctionType, ObjectType this_object, size_t argc, const ValueType arguments[], ReturnValue &return_value) {
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validate_argument_count(argc, 0);
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auto list = get_internal<T, ListClass<T>>(this_object);
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list->m_notification_tokens.clear();
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}
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} // js
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} // realm
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