Module: SmarterCSV::HashTransformations

Included in:
Reader
Defined in:
lib/smarter_csv/hash_transformations.rb

Constant Summary collapse

FLOAT_REGEX =

Frozen regex constants for performance (avoid recompilation on every value)

/\A[+-]?\d+\.\d+\z/.freeze
INTEGER_REGEX = 
/\A[+-]?\d+\z/.freeze
ZERO_REGEX = 
/\A0+(?:\.0+)?\z/.freeze

Instance Method Summary collapse

Instance Method Details

#hash_transformations(hash, options) ⇒ Object 



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# File 'lib/smarter_csv/hash_transformations.rb', line 10

def hash_transformations(hash, options)
  # Modify hash in-place for performance (avoids allocating a second hash per row)

  # Remove nil/empty keys
  hash.delete(nil)
  hash.delete('')
  hash.delete(:"")

  remove_empty_values = options[:remove_empty_values] == true
  remove_zero_values = options[:remove_zero_values]
  remove_values_matching = options[:remove_values_matching]
  convert_to_numeric = options[:convert_values_to_numeric]
  value_converters = options[:value_converters]

  # Early return if no transformations needed
  return hash unless remove_empty_values || remove_zero_values || remove_values_matching || convert_to_numeric || value_converters

  keys_to_delete = []

  hash.each do |k, v|
    # Check if this key/value should be removed
    if remove_empty_values && (has_rails ? v.blank? : blank?(v))
      keys_to_delete << k
      next
    end

    if remove_zero_values && v.is_a?(String) && ZERO_REGEX.match?(v)
      keys_to_delete << k
      next
    end

    if remove_values_matching && v.is_a?(String) && remove_values_matching.match?(v)
      keys_to_delete << k
      next
    end

    # Convert to numeric if requested
    if convert_to_numeric && v.is_a?(String) && !limit_execution_for_only_or_except(options, :convert_values_to_numeric, k)
      if FLOAT_REGEX.match?(v)
        hash[k] = v.to_f
      elsif INTEGER_REGEX.match?(v)
        hash[k] = v.to_i
      end
    end

    # Apply value converters
    if value_converters
      converter = value_converters[k]
      hash[k] = converter.convert(hash[k]) if converter
    end
  end

  # Delete marked keys
  keys_to_delete.each { |k| hash.delete(k) }

  hash
end