Module: SmartAttr::Base::ClassMethods

Defined in:
lib/smart_attr/base.rb

Instance Method Summary collapse

Instance Method Details

#smart_attr(*args) ⇒ Object 



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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
 
# File 'lib/smart_attr/base.rb', line 11

def smart_attr *args
  column_name, options = args[0], args.extract_options!

  config = ConfigHash.new(options[:config])

  # result:
  # {
  #   one:    { value: 1, desc: 'one star' },
  #   two:    { value: 2, desc: 'two star' },
  #   three:  { value: 3, desc: 'three star' },
  #   four:   { value: 4, desc: 'four star' },
  #   five:   { value: 5, desc: 'five star' }
  # }
  define_singleton_method "#{column_name}_config".to_sym do |*_args|
    config
  end

  define_singleton_method "#{column_name}_config_hash".to_sym do |*_args|
    config.instance_variable_get :@config_hash
  end

  # result:
  # [
  #   ['one star', 1],
  #   ['two star', 2],
  #   ['three star', 3],
  #   ['four star', 4],
  #   ['five star', 5]
  # ]
  define_singleton_method "#{column_name}_array".to_sym do |*_args|
    _selector = self.send("#{column_name}_config").dup

    _selector.inject([]) do |_result, _pair|
      _key, _config = _pair

      _result << [_config[:value], _config[:desc]]
      _result
    end
  end

  # result:
  #
  # { value: 1, desc: 'one star' }
  #
  define_method "#{column_name}_config".to_sym do
    return {} unless self.class.respond_to?("#{column_name}_config".to_sym)

    result = self.class.send("#{column_name}_config").item(self.send(column_name.to_s))
    result || {}
  end

  define_method "#{column_name}_desc".to_sym do
    self.send("#{column_name}_config")[:desc]
  end

  define_method "#{column_name}_name".to_sym do
    self.send("#{column_name}_config")[:key]
  end

  all_instance_methods = self.private_instance_methods + self.instance_methods
  if all_instance_methods.include?(:write_attribute) && all_instance_methods.include?(:read_attribute)

    define_method "#{column_name}_name=".to_sym do |name|
      write_attribute(column_name, self.class.send("#{column_name}_config")[name].try(:[], :value))
    end

    config.keys.each do |_key|
      define_singleton_method "#{column_name}_#{_key}".to_sym do
        self.where("#{column_name}" => self.send("#{column_name}_config")[_key.to_sym].try(:[], :value))
      end

      define_method "#{column_name}_#{_key}!".to_sym do
        write_attribute(column_name, self.class.send("#{column_name}_config")[_key.to_sym].try(:[], :value))
      end

      define_method "#{column_name}_#{_key}?".to_sym do
        read_attribute(column_name) == self.class.send("#{column_name}_config")[_key.to_sym][:value]
      end
    end
  else
    attr_accessor column_name

    define_method "#{column_name}_name=".to_sym do |name|
      send("#{column_name}=", self.class.send("#{column_name}_config")[name].try(:[], :value))
    end

    config.keys.each do |_key|

      define_method "#{column_name}_#{_key}!".to_sym do
        send("#{column_name}=", self.class.send("#{column_name}_config")[_key.to_sym][:value])
      end

      define_method "#{column_name}_#{_key}?".to_sym do
        send(column_name) == self.class.send("#{column_name}_config")[_key.to_sym][:value]
      end
    end
  end

end