Module: Eco::Data::Locations::NodeDiff::Accessors::ClassMethods

Includes:
Strings::SnakeCase
Defined in:
lib/eco/data/locations/node_diff/accessors.rb

Instance Method Summary collapse

Methods included from Strings::SnakeCase

#snake_case

Instance Method Details

#attr_expose(*attrs) ⇒ Object

Note:

the defined attributes are expected to be the keys within the source Hashes that are being compared.

Note:

accessing src_1 (prev) attributes, will have it's method as prev_[attrName]

Creates the defined accessor attributes against NodeDiff It also creates a method with question mark that evaluates true if any the attr changed.



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# File 'lib/eco/data/locations/node_diff/accessors.rb', line 21

def attr_expose(*attrs)
  attrs.each do |attr|
    meth  = attr.to_sym
    methp = :"#{meth}_prev"
    methq = :"#{meth}?"

    # current value

    define_method meth do
      attr(meth)
    end
    alias_method snake_case(meth), meth

    # prev value

    define_method methp do
      attr_prev(meth)
    end
    alias_method snake_case(methp), methp

    # has it changed?

    define_method methq do
      diff_attr?(meth)
    end
    alias_method snake_case(methq), methq

    @exposed_attrs = (@exposed_attrs || []) | [meth]
  end
end

#exposed_attrs ⇒ Object

Keeps track on what attributes have been exposed.



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# File 'lib/eco/data/locations/node_diff/accessors.rb', line 50

def exposed_attrs
  @exposed_attrs ||= []
end