Method: Xcodeproj::Differ.array_diff

Defined in:
lib/xcodeproj/differ.rb

.array_diff(value_1, value_2, options) ⇒ Object

Returns the recursive diff of two arrays.

See Also:



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# File 'lib/xcodeproj/differ.rb', line 111

def self.array_diff(value_1, value_2, options)
  ensure_class(value_1, Array)
  ensure_class(value_2, Array)
  return nil if value_1 == value_2

  new_objects_value_1 = array_non_unique_diff(value_1, value_2)
  new_objects_value_2 = array_non_unique_diff(value_2, value_1)
  return nil if value_1.empty? && value_2.empty?

  matched_diff = {}
  if id_key = options[:id_key]
    matched_value_1 = []
    matched_value_2 = []
    new_objects_value_1.each do |entry_value_1|
      if entry_value_1.is_a?(Hash)
        id_value = entry_value_1[id_key]
        entry_value_2 = new_objects_value_2.find do |entry|
          entry[id_key] == id_value
        end
        if entry_value_2
          matched_value_1 << entry_value_1
          matched_value_2 << entry_value_2
          diff = diff(entry_value_1, entry_value_2, options)
          matched_diff[id_value] = diff if diff
        end
      end
    end

    new_objects_value_1 -= matched_value_1
    new_objects_value_2 -= matched_value_2
  end

  if new_objects_value_1.empty? && new_objects_value_2.empty?
    if matched_diff.empty?
      nil
    else
      matched_diff
    end
  else
    result = {}
    result[options[:key_1]] = new_objects_value_1 unless new_objects_value_1.empty?
    result[options[:key_2]] = new_objects_value_2 unless new_objects_value_2.empty?
    result[:diff] = matched_diff unless matched_diff.empty?
    result
  end
end