Class: Datacaster::JsonSchemaResult

Inherits:
Hash
  • Object
show all
Defined in:
lib/datacaster/json_schema_result.rb

Instance Method Summary collapse

Constructor Details

#initialize(from = {}, focus = nil) ⇒ JsonSchemaResult

Returns a new instance of JsonSchemaResult.



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# File 'lib/datacaster/json_schema_result.rb', line 3

def initialize(from = {}, focus = nil)
  merge!(from)

  if from.is_a?(self.class)
    @focus = from.focus
  else
    @focus = []
  end

  if focus == false || @focus == false
    @focus = false
    return
  end

  @focus << focus if focus
  @target = self
  @focus.each { |k| @target = @target['properties'][k] }
end

Instance Method Details

#apply(other, schema_attributes = {}) ⇒ Object 



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# File 'lib/datacaster/json_schema_result.rb', line 80

def apply(other, schema_attributes = {})
  return self if other.nil? || other.empty?
  return JsonSchemaResult.new(other) if empty?

  if @focus && !@focus.empty?
    return with_updated_target(JsonSchemaResult.new(@target).apply(other))
  end

  # validations after pick(a, b) & transform
  self_type = self['type']
  other_type = other['type']

  if (self_type == 'object' || self_type == 'array') && (other_type != 'object' && other_type != 'array')
    return JsonSchemaResult.new(self)
  end

  result = self.class.new({})

  if self['required'] || other['required']
    result['required'] = (
      (self['required'] || []).to_set | (other['required'] || []).to_set
    ).to_a
  end

  nested =
    if self['properties'] && (other['items'] || self['items']) ||
      self['items'] && (self['properties'] || other['properties']) ||
      other['items'] && other['properties']
      raise RuntimeError, "can't merge json schemas due to wrong items/properties combination " \
        "for #{self.inspect} and #{other.inspect}", caller
    elsif self['properties'] || other['properties']
      'properties'
    elsif self['items'] || other['items']
      'items'
    else
      nil
    end

  if nested
    result[nested] = {}

    keys = (self[nested] || {}).keys + (other[nested] || {}).keys
    keys = keys.to_set

    keys.each do |k|
      one_k = self[nested] && self[nested][k] || {}
      two_k = other[nested] && other[nested][k] || {}

      if !one_k.is_a?(Hash) || !two_k.is_a?(Hash)
        if one_k.empty? && !two_k.is_a?(Hash)
          result[nested][k] = two_k
        elsif two_k.empty? && !one_k.is_a?(Hash)
          result[nested][k] = one_k
        elsif one_k == two_k
          result[nested][k] = one_k
        else
          raise RuntimeError, "can't merge json schemas due to wrong items/properties combination " \
            "for #{self.inspect} and #{other.inspect}", caller
        end
      elsif one_k.is_a?(Hash) && two_k.is_a?(Hash)
        result[nested][k] = self.class.new(one_k).apply(two_k)
      else
        raise RuntimeError, "can't merge json schemas due to wrong items/properties combination " \
          "for #{self.inspect} and #{other.inspect}", caller
      end

    end
  end

  if self['description'] || other['description']
    result['description'] = other['description'] || self['description']
  end

  (self.keys + other.keys - %w(required properties items description)).to_set.each do |k|
    # used to merge switch schemas
    # TODO: подумать как сделать в обратную сторону
    #     FULL_DETAILS_SCHEMA = Datacaster.partial_schema do
        #   LoanTransferMethods::InitiatorTransferDetailsStruct.schema & switch(
        #     :kind,
        #     product: hash_schema(
        #       currency: string,
        #       us_only: boolean,
        #       name: string,
        #       values: array_of(integer),
        #       official_provider_name: string,
        #     )
        #   ).else(pass)
        # end

    if schema_attributes[:extendable]
      case k
      in 'oneOf'
        self_one_of = self[k]
        other_one_of = other[k]

        result_objects = other_one_of.map do |other_obj|
          other_obj_properties = other_obj['properties'].to_a

          max_same = -1

          # basicly is guessing here, but must be ok in most cases
          merge_candidate = self_one_of.max_by do |self_obj|
            next -1 if self_obj.empty?

            self_obj_properties = self_obj['properties'].to_a

            max_same = (self_obj_properties & other_obj_properties).size

            max_same
          end

          next other_obj if max_same < 1

          Datacaster::Utils.deep_merge(other_obj, merge_candidate)
        end

        next result[k] = result_objects
      else
        raise RuntimeError, "can't merge json schemas due to conflicting field #{k} for " \
          "#{inspect} and #{other.inspect}", caller
      end
    else
      if self[k] && other[k] && self[k] != other[k]
        raise RuntimeError, "can't merge json schemas due to conflicting field #{k} for " \
          "#{inspect} and #{other.inspect}", caller
      end
    end

    result[k] = other[k] || self[k]
  end

  result
end

#object_remap(value, mapping) ⇒ Object 



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# File 'lib/datacaster/json_schema_result.rb', line 48

def object_remap(value, mapping)
  return value unless value['type'] == 'object'

  mapping.each do |from, to|
    from_props = value['properties'][from] || {}
    to_props = value['properties'][to] || {}

    one_to_one_remap = mapping.values.count { _1 == to } == 1

    properties_from = value['properties'].delete(from)
    properties_to = value['properties'].delete(to)

    if from && (properties_to || properties_from)
      value['properties'][from] =
        if one_to_one_remap
          Datacaster::Utils.deep_merge(to_props, from_props)
        else
          self.class.new(properties_from || {})
        end
    end

    required_from = value['required']&.delete(from)
    required_to = value['required']&.delete(to)

    if from && one_to_one_remap && (required_from || required_to)
      value['required'] << from
    end
  end

  value
end

#remap(mapping) ⇒ Object 



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# File 'lib/datacaster/json_schema_result.rb', line 34

def remap(mapping)
  return self if mapping.empty?

  if self['oneOf'] || self['anyOf']
    type = self.keys.first

    self[type] = self[type].map { |props| object_remap(props, mapping) }
  else
    object_remap(self, mapping)
  end

  self
end

#with_focus_key(key) ⇒ Object 



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# File 'lib/datacaster/json_schema_result.rb', line 22

def with_focus_key(key)
  result = apply(
    "type" => "object",
    "properties" => key ? { key => {} } : {}
  )
  self.class.new(result, key)
end

#without_focus ⇒ Object 



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# File 'lib/datacaster/json_schema_result.rb', line 30

def without_focus
  self.class.new(self).reset_focus
end