Class: Connect::Selector

Inherits:
Object
  • Object
show all
Defined in:
lib/connect/selector.rb

Overview

This class implements the functionality to select parts of the current value

Constant Summary collapse

TO_RESOURCE_REGEX = 
/^\.to_resource\('([a-zA-Z]+)'\)/
SLICE_REGEX = 
/^\.slice\(\s*(['|"]\w*['|"],*\s*)+\)/
SLICE_CONTENT_REGEX = 
/^\.slice_content\(\s*(['|"]\w*['|"],*\s*)+\)/

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value, selector) ⇒ Selector

Returns a new instance of Selector.



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# File 'lib/connect/selector.rb', line 14

def initialize(value, selector)
  @value = value
  @selection_value = convert(value)
  @selector = selector
end

Class Method Details

.run(value, selector) ⇒ Object

Convenience method

Parameters:

  • value (Any) —

    The current value

  • selector (String) —

    the selector to be applied

Returns:

  • a new value



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# File 'lib/connect/selector.rb', line 62

def self.run(value, selector)
  instance = new(value, selector)
  instance.run
end

Instance Method Details

#run ⇒ Object

apply the current selector on the current value

rubocop:disable PerceivedComplexity

Returns:

  • the new value



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# File 'lib/connect/selector.rb', line 26

def run
  if @selector && @selection_value
    begin
      case
      when @selector =~ TO_RESOURCE_REGEX && @value.is_a?(Connect::ObjectRepresentation)
        #
        # The to_resource is a special selector when operating on an object. It will transform the
        # object into a valid resource hash and filter all attributes not available in the selected
        # object.
        #
        convert_to_resource
      when @selector =~ SLICE_REGEX && @value.is_a?(Connect::ObjectRepresentation)
        slice_object
      when @selector =~ SLICE_CONTENT_REGEX && @value.is_a?(Connect::ObjectRepresentation)
        slice_content
      when @selector =~ SLICE_REGEX && @value.is_a?(Hash)
        slice_hash
      else
        instance_eval("@selection_value#{@selector}")
      end
    rescue => e
      raise ArgumentError, "usage of invalid selector '#{@selector}' on value '#{@selection_value}',
        resulted in Ruby error #{e.message}"
    end
  else
    @value
  end
end