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module SassSpec
class Interactor
class Choice < Struct.new(:shortcut, :message, :block)
def run_block!
block.call if block
end
end
def initialize(id = nil)
@choices = []
@choice = nil
@id = id
end
def prompt(message)
@prompt = message
end
def choice(shortcut, message, &block)
@choices << Choice.new(shortcut, message, block)
end
def restart!
@choice = nil
end
def display_choices!(memory)
puts
puts @prompt if @prompt
@choices.each_with_index do |c, i|
puts "#{c.shortcut}. #{c.message}"
end
if @id && memory
puts "Note: If you end your choice with a ! then next time this happens,\n"+
"we'll use that option without prompting you.\n"
end
print "Please select an option > "
end
def run!(memory = nil)
if @id && memory && memory[@id]
@choices.detect{|c| c.shortcut == memory[@id]}.run_block!
return memory[@id]
end
if @choices.size == 0
raise ArgumentError, "No choices to run."
end
@choice = nil
until @choice
display_choices!(memory)
input = $stdin.gets.strip
puts
if input && input.end_with?("!")
repeat = true
input.slice!(-1)
end
@choice = input
if (choice = @choices.find {|c| c.shortcut == @choice})
choice.run_block! # We run this in the loop so restart! can be invoked.
else
@choice = nil
end
end
@choice # we return the shortcut so re-ordering choices doesn't change result
ensure
if @id && memory && repeat && @choice
memory[@id] = @choice
end
end
def self.interact
interactor = new
yield interactor
interactor.run!
end
def self.interact_with_memory(memory, id)
interactor = new(id)
yield interactor
interactor.run!(memory)
end
end
end
|
