Created
September 11, 2011 19:18
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A simple DSL to create checklists and questionnaires.
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class Symbol | |
def / sym | |
:"#{self}/#{sym}" | |
end | |
def ~ | |
Checklist.lists[self].start | |
end | |
end | |
module Checklist | |
class << self; attr_accessor :lists; end | |
def checklist label=nil, description=nil, &block | |
label ||= "list-#{Time.now.to_i}-#{rand 1000}" | |
Checklist.lists ||= {} | |
Checklist.lists[label] = List.new label, description, &block | |
end | |
class List | |
attr_accessor :current, :score_override, :total_override | |
attr_reader :checks | |
def initialize label, description=nil, &block | |
@label = label | |
@description = description | |
@checks = [] | |
instance_eval &block | |
end | |
def check description=nil, options={}, &block | |
options[:checklist] ||= self | |
@checks << Check.new(description, options, &block) | |
end | |
def previous | |
@current > 0 ? @checks[@current-1].run : @checks[@current].run | |
end | |
def next | |
available = @current+1 <= @checks.size-1 | |
if available then | |
@checks[@current+1].run | |
else | |
@checks[@current].answer ? finish : @checks[@current].run | |
end | |
end | |
def start | |
@checks.first.run | |
end | |
def finish | |
report | |
exit | |
end | |
def report | |
puts | |
puts "="*50 | |
@checks.each_with_index do |check, i| | |
puts "Check\t##{i+1}: #{check.score}/#{check.total}" | |
end | |
puts "-"*50 | |
puts "Score: #{score}/#{total}" | |
puts "="*50 | |
end | |
def score | |
@checks.map{|c| c.score}.reduce :"+" | |
end | |
def total | |
@checks.map{|c| c.total}.reduce :"+" | |
end | |
end | |
class Check | |
attr_reader :answer, :score | |
def initialize description=nil, options={}, &block | |
@description = description | |
@options = options | |
@options[:value] ||= 1 | |
@options[:mandatory] ||= false | |
@score = 0 | |
instance_eval &block if block_given? | |
raise RuntimeError, "Task #{@options[:label]} is not assigned to any checklist" unless @options[:checklist] | |
raise RuntimeError, "No description provided for task #{@options[:label]}" unless @description | |
[:value, :label, :mandatory, :checklist].each do |v| | |
var = :"@#{v}" | |
instance_variable_set var, @options[v] unless instance_variable_get var | |
end | |
end | |
def total | |
if @choices then | |
@choices.map{|c| c[:value]}.max | |
else | |
@value | |
end | |
end | |
def description text | |
@description = text | |
end | |
def mandatory | |
@mandatory = true | |
end | |
def beforehand &block | |
@beforehand = block | |
end | |
def afterwards &block | |
@afterwards = block | |
end | |
def value n | |
@value = n | |
end | |
def choice description, value=1 | |
@choices ||= [] | |
@choices << {description: description, value: value} | |
end | |
def run | |
@checklist.current = @checklist.checks.index self | |
instance_eval &@beforehand if @beforehand | |
loop do | |
puts "="*50 | |
puts "Check #{@checklist.current+1}/#{@checklist.checks.size} (Score: #{@checklist.score}/#{@checklist.total})" | |
puts "-"*50 | |
describe | |
break if (@choices ? choose : confirm) | |
end | |
instance_eval &@afterwards if @afterwards | |
@checklist.next | |
end | |
protected | |
def describe | |
print @description | |
end | |
def choose | |
print "\n" | |
@choices.each_with_index do |choice, i| | |
puts "-- #{i+1}. #{choice[:description]}" | |
end | |
@answer = input do |answer| | |
sel = answer.to_i | |
sel > 0 && sel <= @choices.size | |
end | |
@score = @choices[@answer.to_i-1][:value] if @answer | |
end | |
def confirm | |
print " [y/n]\n" | |
@answer = input do |answer| | |
answer =~ /^(y(es)?|n(o)?)$/i | |
end | |
if @answer then | |
@score = @answer =~ /^y(es)?$/i ? @value : 0 | |
end | |
end | |
def finish | |
@checklist.finish | |
end | |
def separate | |
puts '='*50 | |
end | |
def input(message="=> Error: Invalid answer.", prompt='~> ', &block) | |
puts "~"*50 | |
print prompt | |
answer = gets.chomp | |
case answer | |
when '<' then | |
@checklist.previous | |
return | |
when '>' then | |
if @mandatory then | |
message = "=> Error: check cannot be skipped." | |
else | |
@checklist.next | |
return | |
end | |
when '<<' then | |
@checklist.start | |
return | |
when '>>' then | |
@checklist.finish | |
end | |
valid = block.call(answer) | |
if valid then | |
answer | |
else | |
puts message | |
false | |
end | |
end | |
end | |
end | |
########################### | |
include Checklist | |
checklist :test/:checklist do | |
check "Ready?" | |
check do | |
description "Choose something" | |
mandatory | |
choice "Do this" | |
choice "Do that", 0 | |
choice "None of the above", 2 | |
afterwards do | |
if @score > 1 then | |
finish | |
end | |
end | |
end | |
check do | |
description "Do something else?" | |
value 3 | |
end | |
check "OK?", value: 10, mandatory: true | |
end | |
~(:test/:checklist) |
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