Class: Grandprix::Elements

Inherits:
Object
  • Object
show all
Defined in:
lib/grandprix/elements.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(array) ⇒ Elements

Returns a new instance of Elements.



7
8
9
 
# File 'lib/grandprix/elements.rb', line 7

def initialize(array)
  @array = array
end

Class Method Details

.build(array) ⇒ Object 



2
3
4
5
 
# File 'lib/grandprix/elements.rb', line 2

def self.build array
  elements = array.map {|element| element.split '=' }
  self.new(elements)
end

Instance Method Details

#+(other) ⇒ Object

other is also an Elements object



12
13
14
 
# File 'lib/grandprix/elements.rb', line 12

def +(other)
  self.class.new(@array + other.underlying)
end

#==(other) ⇒ Object 



80
81
82
83
 
# File 'lib/grandprix/elements.rb', line 80

def ==(other)
  return false unless other.respond_to?(:underlying)
  self.underlying == other.underlying
end

#alongside(extra) ⇒ Object

extra is a hash from names to array of names



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
 
# File 'lib/grandprix/elements.rb', line 32

def alongside(extra)
  extra_pairs = extra.flat_map do |origin_name, destination_names|
    local_pair = find(origin_name)
    if local_pair and local_pair.size == 2
      extra = local_pair[1]
      destination_names.map {|d| [d, extra] }
    elsif local_pair
      destination_names.map {|d| [d] }
    else
      []
    end
  end
  
  #self + extra_elements
  self.class.new(@array + extra_pairs)
end

#annotate(annotations) ⇒ Object

annotations is a hash of names to metadata



50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
 
# File 'lib/grandprix/elements.rb', line 50

def annotate(annotations)
  def value_component(value)
    return nil if value.nil?
    return value if value.is_a? String
    return JSON.dump(value)
  end

  new_elements = underlying.map do |element|
    name = element.first
    find(name).clone.tap do |row|
      annotation = value_component annotations[name]
      row[2] = annotation unless annotation.nil?
    end
  end

  self.class.new new_elements
end

#except(other) ⇒ Object

except is an array of names



17
18
19
 
# File 'lib/grandprix/elements.rb', line 17

def except(other)
  self.class.new(@array.reject {|e| other.include? e.first})
end

#names ⇒ Object 



72
73
74
 
# File 'lib/grandprix/elements.rb', line 72

def names
  @array.map &:first
end

#reorder(ordering) ⇒ Object

ordering is an array of names



22
23
24
25
26
27
28
29
 
# File 'lib/grandprix/elements.rb', line 22

def reorder(ordering)
  names_in_order = ordering & names
  new_array = names_in_order.map do |name| 
    find(name)
  end

  self.class.new(new_array)
end

#strings ⇒ Object 



68
69
70
 
# File 'lib/grandprix/elements.rb', line 68

def strings
  underlying.map {|e| e.join("=") }
end

#to_a ⇒ Object 



76
77
78
 
# File 'lib/grandprix/elements.rb', line 76

def to_a
  names
end

#to_s ⇒ Object 



85
86
87
 
# File 'lib/grandprix/elements.rb', line 85

def to_s
  "<Elements #{self.strings.inspect}>"
end

#underlying ⇒ Object 



89
90
91
 
# File 'lib/grandprix/elements.rb', line 89

def underlying
  @array
end

#value_component(value) ⇒ Object 



51
52
53
54
55
 
# File 'lib/grandprix/elements.rb', line 51

def value_component(value)
  return nil if value.nil?
  return value if value.is_a? String
  return JSON.dump(value)
end