Module: Itrigga::Config::Macros

Included in:
Configuration
Defined in:
lib/itrigga/config/macros.rb

Class Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
 
# File 'lib/itrigga/config/macros.rb', line 6

def self.included(klass)
  klass.send(:include, InstanceMethods)

  # provides a convenient array of all param names without the "@", handy for dumping / debugging
  define_method( :params ) do
    klass.instance_variables.map{ |v| v.gsub(/@(.+)/, '\1') } - ['inheritable_attributes']
  end

  define_method(:param) do |arg|
    if klass.instance_variables.include? "@#{arg}"
      klass.instance_variable_get("@#{arg}") 
    else
      raise ArgumentError.new("no param found called '#{arg}'")
    end
  end


  klass.class_eval {
    
    class << self
    
      def param_getter( name, default_value=nil, &block )
          instance_variable_set( "@#{name}", default_value )
          define_method( name.to_s ) do
            if instance_variables.include? "@#{name}"
              instance_variable_get("@#{name}")
            else
              if block
                instance_variable_set("@#{name}", block.call(self) )  
              else
                instance_variable_set("@#{name}", default_value)
              end
            end
          end
        end
      
      def param_setter( name )
        define_method(:recursive_update) do |p, h|
          h.each do |k, v|
            prev = p[k.to_sym]
            if prev.is_a?(Hash) && v.is_a?(Hash)
              recursive_update(prev, v)
            else
              p[k.to_sym]=v
            end
          end
        end
      
        define_method("#{name}=") do |val|                
          if val.is_a?(Hash) && self.send("#{name}".to_sym).is_a?(Hash)
            recursive_update(self.send("#{name}".to_sym), val)
          else
            instance_variable_set("@#{name}", val)
          end
        end
      end
      
      
      def def_param( name, default_value, &block )
        param_getter( name, default_value, &block )
        param_setter( name )
      end
    
    
    end

  
  } # klass.class_eval
   
end