LiveQuery.hpp

#ifndef _DITTO_LIVE_QUERY_
#define _DITTO_LIVE_QUERY_
 
#include "Document.hpp"
#include "Helpers.hpp"
#include "LiveQueryEvent.hpp"
#include "LiveQueryMove.hpp"
#include "Observer.hpp"
#include "SingleDocumentLiveQueryEvent.hpp"
#include "Subscription.hpp"
#include "json.hpp"
 
#include <functional>
#include <memory>
#include <string>
#include <vector>
 
namespace ditto {
class DittoHandleWrapper;
class OrderBy;

typedef std::function<void(std::shared_ptr<Document>,
                           SingleDocumentLiveQueryEvent)>
    SingleDocumentLiveQueryEventCallback;

struct SingleDocumentLiveQueryEventHandler {
  std::function<void(std::shared_ptr<Document>, SingleDocumentLiveQueryEvent)>
      fn;
};

typedef std::function<void(std::shared_ptr<Document>,
                           SingleDocumentLiveQueryEvent,
                           std::function<void()> &)>
    SingleDocumentLiveQueryEventWithNextSignalCallback;

struct SingleDocumentLiveQueryWithNextSignalEventHandler {
  std::function<void(std::shared_ptr<Document>, SingleDocumentLiveQueryEvent,
                     std::function<void()> &)>
      fn;
};

typedef std::function<void(std::vector<Document>, LiveQueryEvent)>
    LiveQueryEventCallback;

struct LiveQueryEventHandler {
  std::function<void(std::vector<Document>, LiveQueryEvent)> fn;
};

typedef std::function<void(std::vector<Document>, LiveQueryEvent,
                           std::function<void()> &)>
    LiveQueryEventWithNextSignalCallback;

struct LiveQueryWithNextSignalEventHandler {
  std::function<void(std::vector<Document>, LiveQueryEvent,
                     std::function<void()> &)>
      fn;
};

class LiveQuery : public Observer {
public:
  ~LiveQuery(); // required by pimpl.
  LiveQuery(LiveQuery &&);
  LiveQuery &operator=(LiveQuery &&);
 
  struct ArcCtx;
 
private:
  LiveQuery(std::shared_ptr<DittoHandleWrapper> const &ditto_handle_wrapper,
            std::string query, nlohmann::json query_args, std::string coll_name,
            std::shared_ptr<OrderBy> const &order_by, int32_t limit,
            uint32_t offset, LiveQueryAvailability_t availability,
            std::unique_ptr<Subscription> &&subscription,
            LiveQueryEventWithNextSignalCallback &&event_callback);
 
  void on_stop() override;
  // Non-trivial dtor requires manual swap for assignment operators.
  static void swap(LiveQuery &lhs, LiveQuery &rhs) noexcept;
 
  std::unique_ptr<ArcCtx> ctx; // pimpl.
 
  friend class PendingCursorOperation;
  friend class PendingIDSpecificOperation;
};
 
} // namespace ditto
 
#endif