Class: Florrick::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/florrick/builder.rb

Constant Summary collapse

VALID_EXPORT_TYPES = 
[String, Numeric, Date, Time]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(string, objects = {}) ⇒ Builder

Returns a new instance of Builder.



8
9
10
11
 
# File 'lib/florrick/builder.rb', line 8

def initialize(string, objects = {})
  @original_string = string
  @objects = objects
end

Instance Attribute Details

#objects ⇒ Object (readonly)

Returns the value of attribute objects.



6
7
8
 
# File 'lib/florrick/builder.rb', line 6

def objects
  @objects
end

#original_string ⇒ Object (readonly)

Returns the value of attribute original_string.



6
7
8
 
# File 'lib/florrick/builder.rb', line 6

def original_string
  @original_string
end

Instance Method Details

#output ⇒ Object 



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
 
# File 'lib/florrick/builder.rb', line 13

def output
  string = @original_string.dup
  string.gsub(/(\{\{([(\w+)\.]+)(?>\ ?\|\ ?([\w\-\+\ \!\?\[\]\(\)]+))?\}\})/) do
    original_string = $1
    fallback_string = $3
    parts = $2.split('.')
    final_string = nil
    previous_object = @objects[parts.shift.to_sym]

    if previous_object.nil?
      final_string = fallback_string || original_string
    end

    until final_string
      # get the latest part
      if var = parts.shift
        # if the previous object is suitable for string interpolation, we can
        # pass the var to it and get out a string or an integer.
        if previous_object.respond_to?(:string_interpolation_value_for)
          if previous_object.class.string_interpolation_for?(var)
            # we can do this easily
            previous_object = previous_object.string_interpolation_value_for(var)
            # if the previous object was nil, just set to an empty string
            final_string = "" if previous_object.nil?
          elsif previous_object.class.string_interpolation_relationship_for?(var)
            # maybe we can do this on another object
            previous_object = previous_object.send(var)
          else
            # can't do this :(
            final_string = fallback_string || original_string
          end
        elsif VALID_EXPORT_TYPES.any? { |t| previous_object.is_a?(t)}
          previous_object = Florrick::Formatter.convert(var, previous_object)
        else
          # does not respond to string_interpolation_value_for and isn't a valid object,
          # we can't do anything here just return the passed value.
          final_string = fallback_string || original_string
        end
      else
        # we're at the end now, if we can return the previous object, lets do it otherwise
        # we'll just return the string as we can't do anything.
        if VALID_EXPORT_TYPES.any? { |t| previous_object.is_a?(t)}
          final_string = previous_object.to_s
        else
          final_string = fallback_string || original_string
        end
      end
    end
    final_string
  end
end