81 lines
2.7 KiB
C++
81 lines
2.7 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_class.hpp"
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#include "js_types.hpp"
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#include "js_observable.hpp"
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#include "collection_notifications.hpp"
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#if REALM_ENABLE_SYNC
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#include "sync/subscription_state.hpp"
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#endif
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namespace realm {
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namespace js {
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// Empty class that merely serves as useful type for now.
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class Collection {};
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template<typename T>
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struct CollectionClass : ClassDefinition<T, Collection, ObservableClass<T>> {
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using ContextType = typename T::Context;
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using ValueType = typename T::Value;
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using ObjectType = typename T::Object;
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using Object = js::Object<T>;
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using Value = js::Value<T>;
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std::string const name = "Collection";
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static inline ValueType create_collection_change_set(ContextType ctx, const CollectionChangeSet &change_set);
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};
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template<typename T>
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typename T::Value CollectionClass<T>::create_collection_change_set(ContextType ctx, const CollectionChangeSet &change_set)
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{
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ObjectType object = Object::create_empty(ctx);
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std::vector<ValueType> scratch;
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auto make_array = [&](realm::IndexSet const& index_set) {
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scratch.clear();
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scratch.reserve(index_set.count());
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for (auto index : index_set.as_indexes()) {
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scratch.push_back(Value::from_number(ctx, index));
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}
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return Object::create_array(ctx, scratch);
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};
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if (change_set.deletions.count() == std::numeric_limits<size_t>::max()) {
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Object::set_property(ctx, object, "deletions", Object::create_array(ctx, {Value::from_null(ctx)}));
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}
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else {
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Object::set_property(ctx, object, "deletions", make_array(change_set.deletions));
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}
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Object::set_property(ctx, object, "insertions", make_array(change_set.insertions));
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Object::set_property(ctx, object, "newModifications", make_array(change_set.modifications_new));
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auto old_modifications = make_array(change_set.modifications);
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Object::set_property(ctx, object, "modifications", old_modifications);
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Object::set_property(ctx, object, "oldModifications", old_modifications);
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return object;
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}
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} // js
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} // realm
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