Module: Ecoportal::API::Common::GraphQL::Model::Diffable::HashDiff::InstanceMethods

Defined in:
lib/ecoportal/api/common/graphql/model/diffable/hash_diff.rb

Instance Method Summary collapse

Instance Method Details

#diff(a, b, ignore: []) ⇒ Object

Note:

the aim is to delegate hash_diff to the specific classes of the model... bulding the payload/input_base in a cascaded way (rather than in a one-off way from the top alone).

@todo: refactor to only reach the current level



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# File 'lib/ecoportal/api/common/graphql/model/diffable/hash_diff.rb', line 22

def diff(a, b, ignore: [])
  case a
  when Hash
    {}.tap do |diffed|
      a.each do |key, a_value|
        b_value    = b[key] if b
        no_changes = (a_value == b_value) || ignore.include?(key)
        next if !ID_KEYS.include?(key) && no_changes

        diffed[key] = diff(a_value, b_value, ignore: ignore)
        diffed.delete(key) if diffed[key] == {}
      end

      # All keys are IDs, so it's actually blank

      return {} if (diffed.keys - ID_KEYS).empty?
    end
  when Array
    return a unless b.is_a?(Array) && a.length == b.length

    a.map.with_index do |a_value, idx|
      b_value = b[idx]
      diff(a_value, b_value, ignore: ignore)
    end.reject do |el|
      el == {}
    end
  else
    a
  end
end