module Marcman

# File lib/marcman.rb, line 43
def self.addLinkage(code)
  linkage = (MARC[code][:linkage] != false)
  fieldlink = (MARC[code][:fieldlink] != false)

  if linkage and fieldlink
    return MARC[code][:subfields].merge(LINKAGE).merge(FIELDLINK)
  end

  if fieldlink
    return MARC[code][:subfields].merge(FIELDLINK)
  end

  if linkage
    return MARC[code][:subfields].merge(LINKAGE)
  end

  return MARC[code][:subfields]
end

# File lib/marcman.rb, line 32
def self.formatIndicators(code, ind)
  label = ind == 1 ? "First" : "Second"
  indicator = MARC[code][:indicators][ind - 1]
  if indicator == :undefined
    return ["  %s indicator is undefined" % label]
  end

  return ["  %s indicator: %s" % [label, indicator[:definition]]] +
         indicator[:values].map{|k, v| "    %s - %s" % [k, v]}
end

# File lib/marcman.rb, line 22
def self.formatRepeat(r, show)
  return "" unless show

  if r == false
    return " (non-repeatable)"
  end

  return " (repeatable)"
end

# File lib/marcman.rb, line 62
def self.formatSubfields(code, showrepeat)
  sf = addLinkage(code)
  # Sort characters before numbers
  numkeys, charkeys = sf.partition{|a| a[0][1] >= "0" and a[0][1] <= "9"}
  (charkeys.sort + numkeys.sort).
    map{|k, v| "    %s - %s%s" % [k, v[:definition],
                                  formatRepeat(v[:repeat], showrepeat)]}
end

# File lib/marcman.rb, line 9
def self.getFieldFromCode(code)
  unless code =~ /[0-9Xx]{3}/
    raise BadMarcFieldFormatError.new(
            "Sorry, \"%s\" is not a correct MARC field code format."  % code)
  end

  code = code.upcase
  if MARC[code].nil?
    raise NoMarcFieldError.new("No MARC field with the code %s" % code)
  end
  return [code, MARC[code]]
end