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#include "image_io/base/message_handler.h"
#include <memory>
#include <string>
#include <utility>
#include "image_io/base/cout_message_writer.h"
namespace photos_editing_formats {
namespace image_io {
using std::string;
using std::unique_ptr;
/// The message handler. No effort made to delete it at program's end.
static MessageHandler* gMessageHandler = nullptr;
void MessageHandler::Init(std::unique_ptr<MessageWriter> message_writer,
std::unique_ptr<MessageStore> message_store) {
auto* old_handler = gMessageHandler;
gMessageHandler = new MessageHandler;
gMessageHandler->SetMessageWriter(std::move(message_writer));
gMessageHandler->SetMessageStore(std::move(message_store));
delete old_handler;
}
MessageHandler* MessageHandler::Get() {
if (!gMessageHandler) {
gMessageHandler = new MessageHandler;
gMessageHandler->SetMessageWriter(
unique_ptr<MessageWriter>(new CoutMessageWriter));
gMessageHandler->SetMessageStore(
unique_ptr<MessageStore>(new VectorMessageStore));
}
return gMessageHandler;
}
MessageHandler::~MessageHandler() {
if (gMessageHandler == this) {
gMessageHandler = nullptr;
}
}
void MessageHandler::SetMessageWriter(
std::unique_ptr<MessageWriter> message_writer) {
message_writer_ = std::move(message_writer);
}
void MessageHandler::SetMessageStore(
std::unique_ptr<MessageStore> message_store) {
message_store_ = std::move(message_store);
}
void MessageHandler::ReportMessage(Message::Type type, const string& text) {
int system_errno = (type == Message::kStdLibError) ? errno : 0;
ReportMessage(Message(type, system_errno, text));
}
void MessageHandler::ReportMessage(const Message& message) {
if (message_store_) {
message_store_->AddMessage(message);
}
if (message_writer_) {
message_writer_->WriteMessage(message);
}
}
} // namespace image_io
} // namespace photos_editing_formats
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