Module: Sheety::Children::ClassMethods

Defined in:
lib/sheety/children.rb

Instance Method Summary collapse

Instance Method Details

#atom_children(symbol, options) ⇒ Object 



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
110
111
112
113
 
# File 'lib/sheety/children.rb', line 30

def atom_children(symbol, options)

  if options.blank?
    raise ArgumentError.new("blank options #{options} are not valid options for bear_children")
  end

  if options[:klass].blank? || options[:klass].class != Class
    raise ArgumentError.new("#{options} must have a :klass that is a Class, not a #{options[:klass].class}")
  end

  if options[:link].blank?
    raise ArgumentError.new("#{options} must have a non-blank :link")
  end

  unless method_defined?(:link)
    raise TypeError.new("#{self} must respond to :link to bear_children")
  end

  if options[:merge_links] && method_defined?(:add_links) == false
    raise TypeError.new("#{self} must respond to :add_links to bear_children with mrege_links=true")
  end

  plural = symbol.to_s
  singular = plural.singularize

  inst_var_sym = :"@#{symbol}"

  get_method = :"#{plural}"
  new_method = :"new_#{singular}"
  enum_method = :"_enumerate_#{plural}_by_method"
  where_method = :"#{plural}_where"
  except_method = :"#{plural}_except"
  except_any_method = :"#{plural}_except_any"
  find_first_method = :"find_#{singular}"

  define_method(new_method) do |entry=nil|
    options[:klass].new(self, entry)
  end

  define_method(get_method) do |force_refetch=false|
    if instance_variable_get(inst_var_sym).nil? || force_refetch
      list = Sheety::Api.inst.get_feed(link(options[:link])) # sort of a cyclic dependency, suboptimal

      # TODO: Create a ListFeed Object so the links we get here don't need to be worried about collisions on link ids
      add_links(list['link']) if !list['link'].blank? && options[:merge_links]

      list = (list['entry'] || []).map do |entry|
        method(new_method).call(entry)
      end

      instance_variable_set(inst_var_sym, list)
    end

    return instance_variable_get(inst_var_sym)
  end

  define_method(enum_method) do |constraints, method|
    return method(get_method).call().send(method) do |item|
      constraints.all? do |constraint|
        _passes_constraint(_get_i_val(item, constraint[0], options[:accessor]), constraint[1])
      end
    end
  end

  define_method(where_method) do |constraints|
    return method(enum_method).call(constraints, :find_all)
  end

  define_method(find_first_method) do |constraints|
    return method(enum_method).call(constraints, :detect)
  end

  define_method(except_method) do |constraints|
    return method(enum_method).call(constraints, :reject)
  end

  define_method(except_any_method) do |constraints|
    return method(get_method).call().reject do |item|
      constraints.any? do |constraint|
        _passes_constraint(_get_i_val(item, constraint[0], options[:accessor]), constraint[1])
      end
    end
  end
end