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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/feed/core/v2/stream_model/ephemeral_change.h"
namespace feed {
namespace stream_model {
EphemeralChange::EphemeralChange(
EphemeralChangeId id,
std::vector<feedstore::DataOperation> operations)
: id_(id), operations_(std::move(operations)) {}
EphemeralChange::~EphemeralChange() = default;
EphemeralChangeList::EphemeralChangeList() = default;
EphemeralChangeList::~EphemeralChangeList() = default;
EphemeralChange* EphemeralChangeList::AddEphemeralChange(
std::vector<feedstore::DataOperation> operations) {
change_list_.push_back(std::make_unique<EphemeralChange>(
id_generator_.GenerateNextId(), operations));
return change_list_.back().get();
}
EphemeralChange* EphemeralChangeList::Find(EphemeralChangeId id) {
for (std::unique_ptr<EphemeralChange>& change : change_list_) {
if (change->id() == id)
return change.get();
}
return nullptr;
}
std::unique_ptr<FeatureTree> ApplyEphemeralChanges(
const FeatureTree& tree,
const EphemeralChangeList& changes) {
auto tree_with_changes = std::make_unique<FeatureTree>(&tree);
for (const std::unique_ptr<EphemeralChange>& change :
changes.GetChangeList()) {
for (const feedstore::DataOperation& operation : change->GetOperations()) {
if (operation.has_structure()) {
tree_with_changes->ApplyStreamStructure(operation.structure());
}
if (operation.has_content()) {
tree_with_changes->CopyAndAddContent(operation.content());
}
}
}
return tree_with_changes;
}
std::unique_ptr<EphemeralChange> EphemeralChangeList::Remove(
EphemeralChangeId id) {
for (size_t i = 0; i < change_list_.size(); ++i) {
if (change_list_[i]->id() == id) {
std::unique_ptr<EphemeralChange> result = std::move(change_list_[i]);
change_list_.erase(change_list_.begin() + i);
return result;
}
}
return nullptr;
}
} // namespace stream_model
} // namespace feed
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