variant_header.h

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#ifndef __gamgee__variant_header__
#define __gamgee__variant_header__

#include "htslib/vcf.h"

#include <memory>
#include <string>
#include <vector>

namespace gamgee {
  
class VariantHeader {
 public:
  VariantHeader() = default;                                                             
  explicit VariantHeader(const std::shared_ptr<bcf_hdr_t>& header) : m_header{header} {} 
  VariantHeader(const VariantHeader& other);                                             
  VariantHeader(VariantHeader&& other) noexcept;                                         
  VariantHeader& operator=(const VariantHeader& other);                                  
  VariantHeader& operator=(VariantHeader&& other) noexcept;                              
  ~VariantHeader() = default;

  uint32_t n_samples() const { return uint32_t(m_header->n[BCF_DT_SAMPLE]); }  

  std::vector<std::string> filters()       const; 
  std::vector<std::string> samples()       const; 
  std::vector<std::string> contigs()       const; 
  std::vector<std::string> info_fields()   const; 
  std::vector<std::string> format_fields() const; 

  void advanced_merge_header(const VariantHeader& other) { bcf_hdr_combine(other.m_header.get(), m_header.get()); }

 private:
  std::shared_ptr<bcf_hdr_t> m_header;
  
  friend class VariantWriter;
};

}

#endif