Class: Diskman::Chooser

Inherits:
Object
  • Object
show all
Defined in:
lib/diskman/chooser.rb

Overview

Presents the user with a list of items to choose from.

Instance Method Summary collapse

Constructor Details

#initialize(items, item:) ⇒ Chooser 



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# File 'lib/diskman/chooser.rb', line 4

def initialize(items, item:)
    @items = items
    @singular = item
    @plural = item + 's'
end

Instance Method Details

#label ⇒ Object 



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# File 'lib/diskman/chooser.rb', line 10

def label
    if @items.length > 1
        @plural
    else
        @singular
    end
end

#select ⇒ Object 



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# File 'lib/diskman/chooser.rb', line 18

def select
    if @items.length == 0
        $stderr.puts 'No %s found'.yellow % @plural
        raise Interrupt
    end

    if @items.length == 1
        $stderr.puts 'Found the following %s.' % label
    else
        $stderr.puts 'Choose from the following %s.' % @plural
    end

    $stderr.puts

    @items.each_with_index do |device, i|
        $stderr.puts '%5d. %s' % [i + 1, device]
    end

    $stderr.puts

    if @items.length == 1
        $stderr.puts 'Press enter to select it.'
        $stdin.gets
        return @items.first
    end

    $stderr.puts 'Enter your selection.'
    $stderr.puts
    $stderr.print '> '

    selection = $stdin.gets.chomp

    $stderr.puts

    if selection.length == 0
        raise Interrupt
    end

    selection = selection.to_i

    if selection <= 0 || selection > @items.length
        $stderr.puts 'Invalid selection'.red
        raise Interrupt
    end

    @items[selection - 1]
end