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#include "dynamic_depth/container.h"
#include "android-base/logging.h"
#include "dynamic_depth/const.h"
#include "xmpmeta/xml/const.h"
using ::dynamic_depth::xmpmeta::xml::Deserializer;
using ::dynamic_depth::xmpmeta::xml::Serializer;
using ::dynamic_depth::xmpmeta::xml::XmlConst;
namespace dynamic_depth {
constexpr char kNamespaceHref[] =
"http://ns.google.com/photos/dd/1.0/container/";
constexpr char kDirectory[] = "Directory";
constexpr char kResourceType[] = "Resource";
// Private constructor.
Container::Container() {}
void Container::GetNamespaces(
std::unordered_map<string, string>* ns_name_href_map) {
if (ns_name_href_map == nullptr || items_.empty()) {
LOG(ERROR) << "Namespace list is null or item list is empty";
return;
}
ns_name_href_map->emplace(DynamicDepthConst::Container(), kNamespaceHref);
items_[0]->GetNamespaces(ns_name_href_map);
}
std::unique_ptr<Container> Container::FromItems(
std::vector<std::unique_ptr<Item>>* items) {
if (items == nullptr || items->empty()) {
LOG(ERROR) << "Item list is empty";
return nullptr;
}
std::unique_ptr<Container> container(new Container());
container->items_ = std::move(*items);
// Purge item elements that are null.
container->items_.erase(
std::remove_if(
container->items_.begin(), container->items_.end(),
[](const std::unique_ptr<Item>& item) { return item == nullptr; }),
container->items_.end());
if (container->items_.empty()) {
LOG(ERROR) << "No non-null elements in items";
return nullptr;
}
return container;
}
std::unique_ptr<Container> Container::FromDeserializer(
const Deserializer& parent_deserializer) {
std::unique_ptr<Container> container(new Container());
int i = 0;
std::unique_ptr<Deserializer> deserializer =
parent_deserializer.CreateDeserializerFromListElementAt(
DynamicDepthConst::Namespace(DynamicDepthConst::Container()),
DynamicDepthConst::Container(), 0);
while (deserializer) {
std::unique_ptr<Item> item = Item::FromDeserializer(*deserializer);
if (item == nullptr) {
LOG(ERROR) << "Unable to deserialize a item";
return nullptr;
}
container->items_.emplace_back(std::move(item));
deserializer = parent_deserializer.CreateDeserializerFromListElementAt(
DynamicDepthConst::Namespace(DynamicDepthConst::Container()),
DynamicDepthConst::Container(), ++i);
}
if (container->items_.empty()) {
return nullptr;
}
return container;
}
const std::vector<const Item*> Container::GetItems() const {
std::vector<const Item*> items;
for (const auto& item : items_) {
items.push_back(item.get());
}
return items;
}
bool Container::Serialize(Serializer* serializer) const {
if (items_.empty()) {
LOG(ERROR) << "Item list is empty";
return false;
}
std::unique_ptr<Serializer> container_serializer =
serializer->CreateSerializer(
DynamicDepthConst::Namespace(DynamicDepthConst::Container()),
DynamicDepthConst::Container());
if (!container_serializer->WriteProperty(XmlConst::RdfPrefix(),
XmlConst::RdfParseType(),
kResourceType)) {
return false;
}
std::unique_ptr<Serializer> directory_serializer =
container_serializer->CreateListSerializer(DynamicDepthConst::Container(),
kDirectory);
if (directory_serializer == nullptr) {
// Error is logged in Serializer.
return false;
}
for (int i = 0; i < items_.size(); i++) {
std::unique_ptr<Serializer> item_serializer =
directory_serializer->CreateItemSerializer(
DynamicDepthConst::Namespace(DynamicDepthConst::Item()),
DynamicDepthConst::Item());
if (item_serializer == nullptr) {
LOG(ERROR) << "Could not create a list item serializer for Item";
return false;
}
if (!items_[i]->Serialize(item_serializer.get())) {
LOG(ERROR) << "Could not serialize item " << i;
return false;
}
}
return true;
}
} // namespace dynamic_depth
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