Method: Blufin::Image.calc_file_name

Defined in:
lib/core/image.rb

.calc_file_name(prefix, ext, side, length, ratio) ⇒ Object

Standardizes the way output files are named.

Returns:

  • string

Raises:

  • (RuntimeError) 


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# File 'lib/core/image.rb', line 133

def self.calc_file_name(prefix, ext, side, length, ratio)
    raise RuntimeError, "Expected integer, instead got: #{length}" unless length.to_s =~ /^\d+$/
    raise RuntimeError, "Expected one of: #{VALID_SIDES.inspect}, instead got: #{side}" unless VALID_SIDES.include?(side)
    raise RuntimeError, "Unexpected ratio #{Blufin::Terminal::format_highlight(ratio)}, expected something like: 16:9" unless ratio =~ /\d{1,2}:\d{1,2}/
    x = side == 'width' ? length : calc_width_from_ratio(ratio, length)
    y = side == 'width' ? calc_height_from_ratio(ratio, length) : length
    "#{prefix}-#{x}x#{y}.#{ext.downcase}"
end