module OGR

# File lib/ffi-ogr.rb, line 358
def create_writer(path)
  raise RuntimeError.new "Path already exists: #{path}" if File.exists?(path)

  writer = get_writer path
  writer.set_output path
  writer
end

# File lib/ffi-ogr.rb, line 329
def gdal_version
  FFIOGR.GDALVersionInfo('RELEASE_NAME')
end

# File lib/ffi-ogr.rb, line 333
def get_available_drivers
  [].tap do |drivers|
    for i in 0...FFIOGR.OGRGetDriverCount
      drivers << FFIOGR.OGR_Dr_GetName(FFIOGR.OGRGetDriver(i))
    end
  end
end

# File lib/ffi-ogr.rb, line 366
def get_driver_by_extension(extension)
  driver = unless extension == 'kml'
    DRIVER_TYPES[extension]
  else
    drivers.include?('LIBKML') ? 'LIBKML' : 'KML'
  end

  raise RuntimeError.new "Could not find appropriate driver" if driver.nil?

  driver
end

# File lib/ffi-ogr.rb, line 352
def get_writer(source)
  extension = source.split('.').last
  driver = get_driver_by_extension extension
  Writer.new(driver)
end

# File lib/ffi-ogr.rb, line 389
def import_spatial_ref(sr_import, format = 'epsg')
  OGR::SpatialReference.import(sr_import, format)
end

# File lib/ffi-ogr.rb, line 378
def read(source)
  case source
  when /http:|https:/
    HttpReader.new.read source
  else
    driver = get_driver_by_extension source.split('.').last
    raise RuntimeError.new "Could not determine file type" if driver.nil?
    Reader.new(driver).read source
  end
end

# File lib/ffi-ogr.rb, line 348
def string_to_pointer(str)
  FFI::MemoryPointer.from_string(str)
end

# File lib/ffi-ogr.rb, line 342
def to_binary(data)
  buf = FFI::MemoryPointer.new(:char, value.size)
  buf.put_bytes(0, data)
  buf
end