Module: Squared::Common::Prompt

Defined in:
lib/squared/common/prompt.rb

Class Method Summary collapse

Class Method Details

.choice(msg, list = nil, min: 1, max: 1, multiple: false, force: true, grep: nil, auto: true, attempts: 5, timeout: 0) ⇒ Object 



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# File 'lib/squared/common/prompt.rb', line 41

def choice(msg, list = nil, min: 1, max: 1, multiple: false, force: true, grep: nil, auto: true,
           attempts: 5, timeout: 0)
  require 'readline'
  require 'timeout'
  if list
    grep &&= Array(grep).map { |val| Regexp.new(val) }
    items = []
    list.each do |val|
      next if grep&.none? { |pat| pat.match?(line) }

      items << val.chomp
      puts '%2d. %s' % [items.size, val]
    end
    max = items.size
    raise_error 'empty selection list' if max == 0
    min = [min, max].min
    if auto
      msg = "#{msg}: [1-#{max}#{if multiple
                                  "|,#{multiple.is_a?(Numeric) ? "{#{multiple}}" : ''}"
                                end}] "
    end
  end
  valid = ->(s) { s.match?(/^-?\d+$/) && s.to_i.between?(min, max) }
  Timeout.timeout(timeout) do
    while (ch = Readline.readline(msg))
      unless (ch = ch.strip).empty?
        if multiple
          a = ch.split(/\s*,\s*/)
          b = a.select { |s| valid.call(s) }.map!(&:to_i).sort
          next unless a.size == b.size
          return b unless items
          next if multiple.is_a?(::Numeric) && multiple != b.size

          return b.map! { |i| items[i - 1] }
        elsif valid.call(ch)
          return items ? items[ch.to_i - 1] : ch.to_i
        end
      end
      attempts -= 1
      next if attempts > 0
      break unless force

      exit 1
    end
  rescue Interrupt
    puts
    exit 0
  else
    multiple ? [] : nil
  end
end

.confirm(msg, default = nil, agree: 'Y', cancel: 'N', attempts: 5, timeout: 30) ⇒ Object 



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# File 'lib/squared/common/prompt.rb', line 8

def confirm(msg, default = nil, agree: 'Y', cancel: 'N', attempts: 5, timeout: 30)
  require 'readline'
  require 'timeout'
  if agree == 'Y' && cancel == 'N' && !msg.match?(%r{\[(?:Yn|nY|Y/n|y/N)\]})
    case default
    when 'Y'
      msg = "#{msg} [Y/n] "
    when 'N'
      msg = "#{msg} [y/N] "
    end
  end
  agree = /^#{Regexp.escape(agree)}$/i if agree.is_a?(::String)
  cancel = /^#{Regexp.escape(cancel)}$/i if cancel.is_a?(::String)
  Timeout.timeout(timeout) do
    while (ch = Readline.readline(msg))
      ch = ch.chomp
      case (ch.empty? ? default : ch)
      when agree
        return true
      when cancel
        return false
      end
      attempts -= 1
      exit 1 unless attempts > 0
    end
  rescue Interrupt
    puts
    exit 0
  else
    false
  end
end

.readline(msg, history = false, force: nil, multiline: nil, &blk) ⇒ Object 



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# File 'lib/squared/common/prompt.rb', line 93

def readline(msg, history = false, force: nil, multiline: nil, &blk)
  require 'readline'
  multiline = if multiline && Readline.respond_to?(:readmultiline)
                multiline.is_a?(::Enumerable) || block_given? ? multiline : [multiline.to_s]
              end
  prompt = lambda do
    if !multiline
      Readline.readline(msg, history)
    elsif block_given?
      Readline.readmultiline(msg, history, &blk)
    else
      Readline.readmultiline(msg, history) { |line| multiline.any? { |val| line.split.last.end_with?(val) } }
    end
  end
  case force
  when ::TrueClass, ::FalseClass
    msg = "#{msg} %s " % if multiline
                           multiline.is_a?(::Enumerable) ? "{#{multiline.join('|')}}" : multiline
                         else
                           "(#{force ? 'required' : 'optional'}):"
                         end
    ret = (prompt.call || '').strip
    multiline.each { |val| break if ret.delete_suffix!(val) } if multiline.is_a?(::Enumerable)
    raise_error 'user cancelled' if force && ret.empty?
    ret
  else
    prompt.call
  end
end