Module: Twobook::Utilities

Defined in:
lib/twobook/utilities.rb

Class Method Summary collapse

Class Method Details

.match_params(method, available, error_message) ⇒ Object 



3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
# File 'lib/twobook/utilities.rb', line 3

def self.match_params(method, available, error_message)
  required = method.parameters.select { |p| p.first == :keyreq }.map(&:second)
  optional = method.parameters.select { |p| p.first == :key }.map(&:second)

  if method.parameters.any? { |p| p.first == :req || p.first == :opt }
    raise "match_params only works with named parameters (was given #{method.parameters})"
  end

  missing = required - available.keys
  raise "#{error_message} - missing parameters #{missing}" if missing.any?

  params = available.slice(*(required + optional))
  if params.any?
    method.call(params)
  else
    method.call
  end
end

.types(klass, cache = false) ⇒ Object

Lists all the leaf node descendants of a class. The files must already be loaded.



24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
# File 'lib/twobook/utilities.rb', line 24

def self.types(klass, cache = false)
  if cache
    @types_cache ||= {}
    return @types_cache[klass.name] ||= begin
        klass.descendants
             .reject { |k| k.name.nil? || k.subclasses.reject { |s| s.name.nil? }.any? }
             .sort_by(&:name)
      end
  end

  klass.descendants
       .reject { |k| k.name.nil? || k.subclasses.reject { |s| s.name.nil? }.any? }
       .sort_by(&:name)
end