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#include "xmpmeta/xml/serializer_impl.h"
#include <libxml/tree.h>
#include "base/integral_types.h"
#include "android-base/logging.h"
#include "strings/numbers.h"
#include "xmpmeta/xml/const.h"
#include "xmpmeta/xml/utils.h"
namespace photos_editing_formats {
namespace xml {
// Methods specific to SerializerImpl.
SerializerImpl::SerializerImpl(
const std::unordered_map<string, xmlNsPtr>& namespaces, xmlNodePtr node)
: node_(node), namespaces_(namespaces) {
CHECK(node_ != nullptr) << "Node cannot be null";
CHECK(node_->name != nullptr) << "Name in the XML node cannot be null";
}
bool SerializerImpl::SerializeNamespaces() {
if (namespaces_.empty()) {
return true;
}
if (node_->ns == nullptr && !namespaces_.empty()) {
return false;
}
// Check that the namespaces all have hrefs and that there is a value
// for the key node_name.
// Set the namespaces in the root node.
xmlNsPtr node_ns = node_->ns;
for (const auto& entry : namespaces_) {
CHECK(entry.second->href != nullptr) << "Namespace href cannot be null";
if (node_ns != nullptr) {
node_ns->next = entry.second;
}
node_ns = entry.second;
}
return true;
}
std::unique_ptr<SerializerImpl> SerializerImpl::FromDataAndSerializeNamespaces(
const std::unordered_map<string, xmlNsPtr>& namespaces, xmlNodePtr node) {
std::unique_ptr<SerializerImpl> serializer =
std::unique_ptr<SerializerImpl>( // NOLINT
new SerializerImpl(namespaces, node)); // NOLINT
if (!serializer->SerializeNamespaces()) {
LOG(ERROR) << "Could not serialize namespaces";
return nullptr;
}
return serializer;
}
// Implemented methods.
std::unique_ptr<Serializer> SerializerImpl::CreateSerializer(
const string& node_ns_name, const string& node_name) const {
if (node_name.empty()) {
LOG(ERROR) << "Node name is empty";
return nullptr;
}
if (namespaces_.count(node_ns_name) == 0 && !node_ns_name.empty()) {
LOG(ERROR) << "Prefix " << node_ns_name << " not found in prefix list";
return nullptr;
}
xmlNodePtr new_node =
xmlNewNode(node_ns_name.empty() ? nullptr : namespaces_.at(node_ns_name),
ToXmlChar(node_name.data()));
xmlAddChild(node_, new_node);
return std::unique_ptr<Serializer>(
new SerializerImpl(namespaces_, new_node)); // NOLINT
}
std::unique_ptr<Serializer> SerializerImpl::CreateItemSerializer(
const string& prefix, const string& item_name) const {
if (namespaces_.count(XmlConst::RdfPrefix()) == 0 ||
namespaces_.at(XmlConst::RdfPrefix()) == nullptr) {
LOG(ERROR) << "No RDF prefix namespace found";
return nullptr;
}
if (!prefix.empty() && !namespaces_.count(prefix)) {
LOG(ERROR) << "No namespace found for " << prefix;
return nullptr;
}
if (strcmp(XmlConst::RdfSeq(), FromXmlChar(node_->name)) != 0) {
LOG(ERROR) << "No rdf:Seq node for serializing this item";
return nullptr;
}
xmlNsPtr rdf_prefix_ns = namespaces_.at(string(XmlConst::RdfPrefix()));
xmlNodePtr li_node = xmlNewNode(nullptr, ToXmlChar(XmlConst::RdfLi()));
xmlNodePtr new_node =
xmlNewNode(prefix.empty() ? nullptr : namespaces_.at(prefix),
ToXmlChar(item_name.data()));
xmlSetNs(li_node, rdf_prefix_ns);
xmlAddChild(node_, li_node);
xmlAddChild(li_node, new_node);
return std::unique_ptr<Serializer>(
new SerializerImpl(namespaces_, new_node)); // NOLINT
}
std::unique_ptr<Serializer> SerializerImpl::CreateListSerializer(
const string& prefix, const string& list_name) const {
if (namespaces_.count(XmlConst::RdfPrefix()) == 0 ||
namespaces_.at(XmlConst::RdfPrefix()) == nullptr) {
LOG(ERROR) << "No RDF prefix namespace found";
return nullptr;
}
if (!prefix.empty() && !namespaces_.count(prefix)) {
LOG(ERROR) << "No namespace found for " << prefix;
return nullptr;
}
xmlNodePtr list_node =
xmlNewNode(prefix.empty() ? nullptr : namespaces_.at(prefix),
ToXmlChar(list_name.data()));
xmlNsPtr rdf_prefix_ns = namespaces_.at(string(XmlConst::RdfPrefix()));
xmlNodePtr seq_node = xmlNewNode(nullptr, ToXmlChar(XmlConst::RdfSeq()));
xmlSetNs(seq_node, rdf_prefix_ns);
xmlAddChild(list_node, seq_node);
xmlAddChild(node_, list_node);
return std::unique_ptr<Serializer>(
new SerializerImpl(namespaces_, seq_node)); // NOLINT
}
bool SerializerImpl::WriteBoolProperty(const string& prefix, const string& name,
bool value) const {
const string& bool_str = (value ? "true" : "false");
return WriteProperty(prefix, name, bool_str);
}
bool SerializerImpl::WriteProperty(const string& prefix, const string& name,
const string& value) const {
if (!strcmp(XmlConst::RdfSeq(), FromXmlChar(node_->name))) {
LOG(ERROR) << "Cannot write a property on an rdf:Seq node";
return false;
}
if (name.empty()) {
LOG(ERROR) << "Property name is empty";
return false;
}
// Check that prefix has a corresponding namespace href.
if (!prefix.empty() && namespaces_.count(prefix) == 0) {
LOG(ERROR) << "No namespace found for prefix " << prefix;
return false;
}
// Serialize the property in the format Prefix:Name="Value".
xmlSetNsProp(node_, prefix.empty() ? nullptr : namespaces_.at(prefix),
ToXmlChar(name.data()), ToXmlChar(value.data()));
return true;
}
bool SerializerImpl::WriteIntArray(const string& prefix,
const string& array_name,
const std::vector<int>& values) const {
if (!strcmp(XmlConst::RdfSeq(), FromXmlChar(node_->name))) {
LOG(ERROR) << "Cannot write a property on an rdf:Seq node";
return false;
}
if (values.empty()) {
LOG(WARNING) << "No values to write";
return false;
}
if (namespaces_.count(XmlConst::RdfPrefix()) == 0 ||
namespaces_.at(XmlConst::RdfPrefix()) == nullptr) {
LOG(ERROR) << "No RDF prefix found";
return false;
}
if (!prefix.empty() && !namespaces_.count(prefix)) {
LOG(ERROR) << "No namespace found for " << prefix;
return false;
}
if (array_name.empty()) {
LOG(ERROR) << "Parent name cannot be empty";
return false;
}
xmlNodePtr array_parent_node =
xmlNewNode(prefix.empty() ? nullptr : namespaces_.at(prefix),
ToXmlChar(array_name.data()));
xmlAddChild(node_, array_parent_node);
xmlNsPtr rdf_prefix_ns = namespaces_.at(XmlConst::RdfPrefix());
xmlNodePtr seq_node = xmlNewNode(nullptr, ToXmlChar(XmlConst::RdfSeq()));
xmlSetNs(seq_node, rdf_prefix_ns);
xmlAddChild(array_parent_node, seq_node);
for (int value : values) {
xmlNodePtr li_node = xmlNewNode(nullptr, ToXmlChar(XmlConst::RdfLi()));
xmlSetNs(li_node, rdf_prefix_ns);
xmlAddChild(seq_node, li_node);
xmlNodeSetContent(li_node, ToXmlChar(std::to_string(value).c_str()));
}
return true;
}
bool SerializerImpl::WriteDoubleArray(const string& prefix,
const string& array_name,
const std::vector<double>& values) const {
if (!strcmp(XmlConst::RdfSeq(), FromXmlChar(node_->name))) {
LOG(ERROR) << "Cannot write a property on an rdf:Seq node";
return false;
}
if (values.empty()) {
LOG(WARNING) << "No values to write";
return false;
}
if (namespaces_.count(XmlConst::RdfPrefix()) == 0 ||
namespaces_.at(XmlConst::RdfPrefix()) == nullptr) {
LOG(ERROR) << "No RDF prefix found";
return false;
}
if (!prefix.empty() && !namespaces_.count(prefix)) {
LOG(ERROR) << "No namespace found for " << prefix;
return false;
}
if (array_name.empty()) {
LOG(ERROR) << "Parent name cannot be empty";
return false;
}
xmlNodePtr array_parent_node =
xmlNewNode(prefix.empty() ? nullptr : namespaces_.at(prefix),
ToXmlChar(array_name.data()));
xmlAddChild(node_, array_parent_node);
xmlNsPtr rdf_prefix_ns = namespaces_.at(XmlConst::RdfPrefix());
xmlNodePtr seq_node = xmlNewNode(nullptr, ToXmlChar(XmlConst::RdfSeq()));
xmlSetNs(seq_node, rdf_prefix_ns);
xmlAddChild(array_parent_node, seq_node);
for (float value : values) {
xmlNodePtr li_node = xmlNewNode(nullptr, ToXmlChar(XmlConst::RdfLi()));
xmlSetNs(li_node, rdf_prefix_ns);
xmlAddChild(seq_node, li_node);
xmlNodeSetContent(
li_node, ToXmlChar(dynamic_depth::strings::SimpleFtoa(value).c_str()));
}
return true;
}
} // namespace xml
} // namespace photos_editing_formats
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