tdlight/td/telegram/files/FileGenerateManager.h

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
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#include "td/telegram/files/FileLocation.h"
#include "td/actor/actor.h"
#include "td/actor/PromiseFuture.h"
#include "td/utils/Status.h"
#include <map>
namespace td {
class FileGenerateActor;
class FileGenerateCallback {
public:
FileGenerateCallback() = default;
FileGenerateCallback(const FileGenerateCallback &) = delete;
FileGenerateCallback &operator=(const FileGenerateCallback &) = delete;
virtual ~FileGenerateCallback() = default;
virtual void on_partial_generate(const PartialLocalFileLocation &partial_local, int32 expected_size) = 0;
virtual void on_ok(const FullLocalFileLocation &local) = 0;
virtual void on_error(Status error) = 0;
};
class FileGenerateManager final : public Actor {
public:
explicit FileGenerateManager(ActorShared<> parent) : parent_(std::move(parent)) {
}
void generate_file(uint64 query_id, FullGenerateFileLocation generate_location,
const LocalFileLocation &local_location, string name, unique_ptr<FileGenerateCallback> callback);
void cancel(uint64 query_id);
// external updates about file generation state
void external_file_generate_write_part(uint64 query_id, int32 offset, string data, Promise<> promise);
void external_file_generate_progress(uint64 query_id, int32 expected_size, int32 local_prefix_size,
Promise<> promise);
void external_file_generate_finish(uint64 query_id, Status status, Promise<> promise);
private:
struct Query {
Query() = default;
Query(const Query &other) = delete;
Query &operator=(const Query &other) = delete;
Query(Query &&other);
Query &operator=(Query &&other);
~Query();
ActorOwn<FileGenerateActor> worker_;
};
ActorShared<> parent_;
std::map<uint64, Query> query_id_to_query_;
bool close_flag_ = false;
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void hangup() final;
void hangup_shared() final;
void loop() final;
void do_cancel(uint64 query_id);
};
} // namespace td