module Orchestra::Util

Public Instance Methods

deconstantize(str) click to toggle source
# File lib/orchestra/util.rb, line 64
def deconstantize str
  split_namespaces(str).first
end
demodulize(str) click to toggle source
# File lib/orchestra/util.rb, line 60
def demodulize str
  split_namespaces(str).last
end
extract_hash(ary) click to toggle source
# File lib/orchestra/util.rb, line 17
def extract_hash ary
  if ary.last.is_a? Hash
    hsh = ary.pop
  else
    hsh = {}
  end
  [hsh, ary]
end
extract_key_args(hsh, *args) click to toggle source
# File lib/orchestra/util.rb, line 5
def extract_key_args hsh, *args
  defaults, args = extract_hash args
  unknown_args = hsh.keys - (args + defaults.keys)
  missing_args = args - hsh.keys
  unless unknown_args.empty? and missing_args.empty?
    raise ArgumentError, key_arg_error(unknown_args, missing_args)
  end
  (args + defaults.keys).map do |arg|
    hsh.fetch arg do defaults.fetch arg end
  end
end
to_camel_case(str) click to toggle source
# File lib/orchestra/util.rb, line 34
def to_camel_case str
  str = "_#{str}"
  str.gsub!(%r{_[a-z]}) { |snake| snake.slice(1).upcase }
  str.gsub!('/', '::')
  str
end
to_lazy_thunk(obj) click to toggle source
# File lib/orchestra/util.rb, line 26
def to_lazy_thunk obj
  if obj.respond_to? :to_proc and not obj.is_a? Symbol
    obj
  else
    Proc.new do obj end
  end
end
to_snake_case(str) click to toggle source
# File lib/orchestra/util.rb, line 41
def to_snake_case str
  str = str.gsub '::', '/'
  # Convert FOOBar => FooBar
  str.gsub! %r{[[:upper:]]{2,}} do |uppercase|
    bit = uppercase[0]
    bit << uppercase[1...-1].downcase
    bit << uppercase[-1]
    bit
  end
  # Convert FooBar => foo_bar
  str.gsub! %r{[[:lower:]][[:upper:]]+[[:lower:]]} do |camel|
    bit = camel[0]
    bit << '_'
    bit << camel[1..-1].downcase
  end
  str.downcase!
  str
end

Private Instance Methods

key_arg_error(unknown, missing) click to toggle source
# File lib/orchestra/util.rb, line 74
def key_arg_error unknown, missing
  str = "bad arguments. "
  if unknown.any?
    str.concat " unknown: #{unknown.join ', '}"
    str.concat "; " if missing.any?
  end
  if missing.any?
    str.concat " missing: #{missing.join ', '}"
  end
  str
end
split_namespaces(name) click to toggle source
# File lib/orchestra/util.rb, line 70
def split_namespaces name
  name.split '::'
end