heapfile.h

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/*
 * SwatDB
 *
 * @authors: See Contributors.doc for code contributors
 *
 * Copyright (c) 2020 Swarthmore College Computer Science Department
 * Swarthmore PA, Professors Tia Newhall, Ameet Soni
 */

#pragma once

#include <string>
#include <vector>
#include <mutex>
#include "swatdb_types.h"
#include "file.h" //for inheritance

class BufferManager;
class HeapPage;
class HeapPageScanner;
class Schema;
class Record;

class HeapFile;

struct HeapFileHeader{

  PageNum free;

  PageNum full;

  std::uint32_t free_size;

  std::uint32_t full_size;

  std::uint64_t num_records;
};

class HeapFile : public File {

  friend class HeapFileScanner;

  public:

    HeapFile(Catalog *catalog, BufferManager *buf_mgr, Schema *schema);

    ~HeapFile() { }

    void createHeader();

    void flushHeader();

    RecordId insertRecord(Record record);

    void getRecord(RecordId record_id, Record* record);

    void updateRecord(RecordId record_id, Record record);

    void deleteRecord(RecordId record_id);

    HeapFileHeader getHeader();

  private:

    void _addPage(HeapPage* page, PageId page_id, bool full);
    void _removePage(HeapPage* page, PageId page_id, bool full);
};