Module: Kali::Utils::Text

Defined in:
lib/kali/utils/text.rb

Class Method Summary collapse

Class Method Details

.fold_line(line) ⇒ Object

Public: Fold lines as indicated by the Content Lines section of [RFC5545](tools.ietf.org/html/rfc5545#section-3.1).

FIXME: This is splitting into 75 character long lines, and not 75 octet long lines. We should deal with UTF-8 properly.

line - A String.

Returns a multi-line String.



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# File 'lib/kali/utils/text.rb', line 15

def fold_line(line)
  head, tail = line[0...75], line[75..-1]
  tail &&= tail.scan(/.{0,74}/)
    .reject { |fragment| fragment.nil? || fragment.empty? }
    .map { |fragment| " #{fragment}" }
  [head, *tail].join("\n")
end

.unfold_line(lines) ⇒ Object

Public: Collapse a folded line into a single line without line breaks. See ‘TextUtils.fold_line`, and [RFC5545].

[rfc]: tools.ietf.org/html/rfc5545#section-3.1

FIXME: This isn’t taking into account that the line could have been folded in the middle of a multi-byte character.

lines - A multi-line String that follows the folding format specified by the RFC.

Returns a String.



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# File 'lib/kali/utils/text.rb', line 35

def unfold_line(lines)
  head, *tail = lines.split("\n")
  tail.map! { |line| line[1..-1] }
  [head, *tail].join("")
end