Class: Csvlint::Csvw::NumberFormat

Inherits:
Object
  • Object
show all
Defined in:
lib/csvlint/csvw/number_format.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pattern = nil, grouping_separator = nil, decimal_separator = ".") ⇒ NumberFormat 



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# File 'lib/csvlint/csvw/number_format.rb', line 7

def initialize(pattern=nil, grouping_separator=nil, decimal_separator=".")
  @pattern = pattern
  @grouping_separator = grouping_separator || (@pattern.nil? ? nil : ",")
  @decimal_separator = decimal_separator || "."
  if pattern.nil?
    @regexp = Regexp.new("^(([-+]?[0-9]+(#{Regexp.escape(@decimal_separator)}[0-9]+)?([Ee][-+]?[0-9]+)?[%‰]?)|NaN|INF|-INF)$")
  else
    numeric_part_regexp = Regexp.new("(?<numeric_part>([0#Ee]|#{Regexp.escape(@grouping_separator)}|#{Regexp.escape(@decimal_separator)})+)")
    number_format_regexp = Regexp.new("^(?<prefix>.*?)#{numeric_part_regexp}(?<suffix>.*?)$")
    match = number_format_regexp.match(pattern)
    raise Csvw::NumberFormatError, "invalid number format" if match.nil?

    @prefix = match["prefix"]
    @numeric_part = match["numeric_part"]
    @suffix = match["suffix"]

    parts = @numeric_part.split("E")
    mantissa_part = parts[0]
    exponent_part = parts[1] || ""
    mantissa_parts = mantissa_part.split(@decimal_separator)
    # raise Csvw::NumberFormatError, "more than two decimal separators in number format" if parts.length > 2
    integer_part = mantissa_parts[0]
    fractional_part = mantissa_parts[1] || ""

    @integer_pattern = exponent_part == "" && fractional_part == ""

    min_integer_digits = integer_part.gsub(@grouping_separator, "").gsub("#", "").length
    min_fraction_digits = fractional_part.gsub(@grouping_separator, "").gsub("#", "").length
    max_fraction_digits = fractional_part.gsub(@grouping_separator, "").length
    min_exponent_digits = exponent_part.gsub("#", "").length
    max_exponent_digits = exponent_part.length

    integer_parts = integer_part.split(@grouping_separator)[1..-1]
    @primary_grouping_size = integer_parts[-1].length rescue 0
    @secondary_grouping_size = integer_parts[-2].length rescue @primary_grouping_size

    fractional_parts = fractional_part.split(@grouping_separator)[0..-2]
    @fractional_grouping_size = fractional_parts[0].length rescue 0

    numeric_part_regexp = "[-+]?"

    if @primary_grouping_size == 0
      integer_regexp = "[0-9]*[0-9]{#{min_integer_digits}}"
    else
      leading_regexp = "([0-9]{0,#{@secondary_grouping_size - 1}}#{Regexp.escape(@grouping_separator)})?"
      secondary_groups = "([0-9]{#{@secondary_grouping_size}}#{Regexp.escape(@grouping_separator)})*"
      if min_integer_digits > @primary_grouping_size
        remaining_req_digits = min_integer_digits - @primary_grouping_size
        req_secondary_groups = remaining_req_digits / @secondary_grouping_size > 0 ? "([0-9]{#{@secondary_grouping_size}}#{Regexp.escape(@grouping_separator)}){#{remaining_req_digits / @secondary_grouping_size}}" : ""
        if remaining_req_digits % @secondary_grouping_size > 0
          final_req_digits = "[0-9]{#{@secondary_grouping_size - (remaining_req_digits % @secondary_grouping_size)}}"
          final_opt_digits = "[0-9]{0,#{@secondary_grouping_size - (remaining_req_digits % @secondary_grouping_size)}}"
          integer_regexp = "((#{leading_regexp}#{secondary_groups}#{final_req_digits})|#{final_opt_digits})[0-9]{#{remaining_req_digits % @secondary_grouping_size}}#{Regexp.escape(@grouping_separator)}#{req_secondary_groups}[0-9]{#{@primary_grouping_size}}"
        else
          integer_regexp = "(#{leading_regexp}#{secondary_groups})?#{req_secondary_groups}[0-9]{#{@primary_grouping_size}}"
        end
      else
        final_req_digits = @primary_grouping_size > min_integer_digits ? "[0-9]{#{@primary_grouping_size - min_integer_digits}}" : ""
        final_opt_digits = @primary_grouping_size > min_integer_digits ? "[0-9]{0,#{@primary_grouping_size - min_integer_digits}}" : ""
        integer_regexp = "((#{leading_regexp}#{secondary_groups}#{final_req_digits})|#{final_opt_digits})[0-9]{#{min_integer_digits}}"
      end
    end

    numeric_part_regexp += integer_regexp

    if max_fraction_digits > 0
      if @fractional_grouping_size == 0
        fractional_regexp = ""
        fractional_regexp += "[0-9]{#{min_fraction_digits}}" if min_fraction_digits > 0
        fractional_regexp += "[0-9]{0,#{max_fraction_digits - min_fraction_digits}}" unless min_fraction_digits == max_fraction_digits
        fractional_regexp = "#{Regexp.escape(@decimal_separator)}#{fractional_regexp}"
        fractional_regexp = "(#{fractional_regexp})?" if min_fraction_digits == 0
        numeric_part_regexp += fractional_regexp
      else
        fractional_regexp = ""

        if min_fraction_digits > 0
          if min_fraction_digits >= @fractional_grouping_size
            # first group of required digits - something like "[0-9]{3}"
            fractional_regexp += "[0-9]{#{@fractional_grouping_size}}"
            # additional groups of required digits - something like "(,[0-9]{3}){1}"
            fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{#{@fractional_grouping_size}}){#{min_fraction_digits / @fractional_grouping_size - 1}}" if min_fraction_digits / @fractional_grouping_size > 1
            fractional_regexp += "#{Regexp.escape(@grouping_separator)}" if min_fraction_digits % @fractional_grouping_size > 0
          end
          # additional required digits - something like ",[0-9]{1}"
          fractional_regexp += "[0-9]{#{min_fraction_digits % @fractional_grouping_size}}" if min_fraction_digits % @fractional_grouping_size > 0

          opt_fractional_digits = max_fraction_digits - min_fraction_digits
          if opt_fractional_digits > 0
            fractional_regexp += "("

            if min_fraction_digits % @fractional_grouping_size > 0
              # optional fractional digits to complete the group
              fractional_regexp += "[0-9]{0,#{[opt_fractional_digits, @fractional_grouping_size - (min_fraction_digits % @fractional_grouping_size)].min}}"
              fractional_regexp += "|"
              fractional_regexp += "[0-9]{#{[opt_fractional_digits, @fractional_grouping_size - (min_fraction_digits % @fractional_grouping_size)].min}}"
            else
              fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{1,#{@fractional_grouping_size}})?"
              fractional_regexp += "|"
              fractional_regexp += "#{Regexp.escape(@grouping_separator)}[0-9]{#{@fractional_grouping_size}}"
            end

            remaining_opt_fractional_digits = opt_fractional_digits - (@fractional_grouping_size - (min_fraction_digits % @fractional_grouping_size))
            if remaining_opt_fractional_digits > 0
              if remaining_opt_fractional_digits % @fractional_grouping_size > 0
                # optional fraction digits in groups
                fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{#{@fractional_grouping_size}}){0,#{remaining_opt_fractional_digits / @fractional_grouping_size}}" if remaining_opt_fractional_digits > @fractional_grouping_size
                # remaining optional fraction digits
                fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{1,#{remaining_opt_fractional_digits % @fractional_grouping_size}})?"
              else
                # optional fraction digits in groups
                fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{#{@fractional_grouping_size}}){0,#{(remaining_opt_fractional_digits / @fractional_grouping_size) - 1}}" if remaining_opt_fractional_digits > @fractional_grouping_size
                # remaining optional fraction digits
                fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{1,#{@fractional_grouping_size}})?"
              end

              # optional fraction digits in groups
              fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{#{@fractional_grouping_size}}){0,#{(remaining_opt_fractional_digits / @fractional_grouping_size) - 1}}" if remaining_opt_fractional_digits > @fractional_grouping_size
              # remaining optional fraction digits
              fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{1,#{remaining_opt_fractional_digits % @fractional_grouping_size}})?" if remaining_opt_fractional_digits % @fractional_grouping_size > 0
            end
            fractional_regexp += ")"
          end
        elsif max_fraction_digits % @fractional_grouping_size > 0
          # optional fractional digits in groups
          fractional_regexp += "([0-9]{#{@fractional_grouping_size}}#{Regexp.escape(@grouping_separator)}){0,#{max_fraction_digits / @fractional_grouping_size}}"
          # remaining optional fraction digits
          fractional_regexp += "(#{Regexp.escape(@grouping_separator)}[0-9]{1,#{max_fraction_digits % @fractional_grouping_size}})?" if max_fraction_digits % @fractional_grouping_size > 0
        else
          fractional_regexp += "([0-9]{#{@fractional_grouping_size}}#{Regexp.escape(@grouping_separator)}){0,#{(max_fraction_digits / @fractional_grouping_size) - 1}}" if max_fraction_digits > @fractional_grouping_size
          fractional_regexp += "[0-9]{1,#{@fractional_grouping_size}}"
        end
        fractional_regexp = "#{Regexp.escape(@decimal_separator)}#{fractional_regexp}"
        fractional_regexp = "(#{fractional_regexp})?" if min_fraction_digits == 0
        numeric_part_regexp += fractional_regexp
      end
    end

    if max_exponent_digits > 0
      numeric_part_regexp += "E"
      numeric_part_regexp += "[0-9]{0,#{max_exponent_digits - min_exponent_digits}}" unless max_exponent_digits == min_exponent_digits
      numeric_part_regexp += "[0-9]{#{min_exponent_digits}}" unless min_exponent_digits == 0
    end

    @regexp = Regexp.new("^(?<prefix>#{Regexp.escape(@prefix)})(?<numeric_part>#{numeric_part_regexp})(?<suffix>#{suffix})$")
  end
end

Instance Attribute Details

#decimal_separator ⇒ Object (readonly)

Returns the value of attribute decimal_separator.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def decimal_separator
  @decimal_separator
end

#fractional_grouping_size ⇒ Object (readonly)

Returns the value of attribute fractional_grouping_size.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def fractional_grouping_size
  @fractional_grouping_size
end

#grouping_separator ⇒ Object (readonly)

Returns the value of attribute grouping_separator.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def grouping_separator
  @grouping_separator
end

#numeric_part ⇒ Object (readonly)

Returns the value of attribute numeric_part.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def numeric_part
  @numeric_part
end

#pattern ⇒ Object (readonly)

Returns the value of attribute pattern.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def pattern
  @pattern
end

#prefix ⇒ Object (readonly)

Returns the value of attribute prefix.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def prefix
  @prefix
end

#primary_grouping_size ⇒ Object (readonly)

Returns the value of attribute primary_grouping_size.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def primary_grouping_size
  @primary_grouping_size
end

#secondary_grouping_size ⇒ Object (readonly)

Returns the value of attribute secondary_grouping_size.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def secondary_grouping_size
  @secondary_grouping_size
end

#suffix ⇒ Object (readonly)

Returns the value of attribute suffix.



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# File 'lib/csvlint/csvw/number_format.rb', line 5

def suffix
  @suffix
end

Instance Method Details

#match(value) ⇒ Object 



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# File 'lib/csvlint/csvw/number_format.rb', line 155

def match(value)
  value =~ @regexp ? true : false
end

#parse(value) ⇒ Object 



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# File 'lib/csvlint/csvw/number_format.rb', line 159

def parse(value)
  if @pattern.nil?
    return nil if !@grouping_separator.nil? && value =~ Regexp.new("((^#{Regexp.escape(@grouping_separator)})|#{Regexp.escape(@grouping_separator)}{2})")
    value.gsub!(@grouping_separator, "") unless @grouping_separator.nil?
    if value =~ INTEGER_REGEXP
      case value[-1]
      when "%"
        return value.to_f / 100
      when "‰"
        return value.to_f / 1000
      else
        return value.to_i
      end
    elsif value =~ @regexp
      case value
      when "NaN"
        return Float::NAN
      when "INF"
        return Float::INFINITY
      when "-INF"
        return -Float::INFINITY
      else
        case value[-1]
        when "%"
          return value.to_f / 100
        when "‰"
          return value.to_f / 1000
        else
          return value.to_f
        end
      end
    else
      return nil
    end
  else
    match = @regexp.match(value)
    return nil if match.nil?
    number = match["numeric_part"].gsub(@grouping_separator, "")
    return number.to_i if @integer_pattern
    return number.to_f
  end
end