Class: Expressionist::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/expressionist/context.rb

Instance Method Summary collapse

Constructor Details

#initialize(data = {}) ⇒ Context

Returns a new instance of Context.



7
8
9
 
# File 'lib/expressionist/context.rb', line 7

def initialize(data = {})
  @data = data
end

Instance Method Details

#[](key) ⇒ Object 



33
34
35
 
# File 'lib/expressionist/context.rb', line 33

def [](key)
  find(key.split('.'), @data)
end

#[]=(key, value) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
 
# File 'lib/expressionist/context.rb', line 11

def []=(key, value)
  segments = key.split('.')
  len = segments.length
  data = @data
  (0...len).each do |i|
    key = segments[i]
    data = (data[key] ||= {})
  end
  data['.'] = value
end

#cast(value) ⇒ Object 



66
67
68
69
70
71
72
73
74
75
76
77
78
79
 
# File 'lib/expressionist/context.rb', line 66

def cast(value)
  case value
  when 'true'
    true
  when 'false'
    false
  when /[0-9]+[.,][0-9]+/
    Float(value)
  when /[0-9]+/
    Integer(value)
  else
    value
  end
end

#delete(key) ⇒ Object 



22
23
24
25
26
27
28
29
30
31
 
# File 'lib/expressionist/context.rb', line 22

def delete(key)
  segments = key.split('.')
  len = segments.length
  data = @data
  (0...len).each do |i|
    break unless data
    data = data[segments[i]]
  end
  data.delete('.') if data
end

#export ⇒ Object 



62
63
64
 
# File 'lib/expressionist/context.rb', line 62

def export
  @data
end

#find(segments = [], data = nil) ⇒ Object 



37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/expressionist/context.rb', line 37

def find(segments = [], data = nil)
  data ||= @data
  segment = segments[0]
  subsegments = segments[1..-1]

  case
  when data == nil
    [nil]
  when segments.length == 0
    [cast(data['.'])]
  when segment == '?'
    (data.keys - ['.']).map do |k|
      find(subsegments, data[k])
    end
  when segment == '*' && subsegments.length > 0 && data[subsegments[0]]
    find(subsegments[1..-1], data[subsegments[0]])
  when segment == '*'
    (subsegments.length == 0 ? [data['.']] : []) + (data.keys - ['.']).map do |k|
      find(segments, data[k])
    end
  else
    find(subsegments, data[segment])
  end.flatten.compact
end