Class: Chronicle::Schema::Validation::ContractFactory

Inherits:
Object
  • Object
show all
Defined in:
lib/chronicle/schema/validation/contract_factory.rb

Class Method Summary collapse

Class Method Details

.build_type(range) ⇒ Object 



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# File 'lib/chronicle/schema/validation/contract_factory.rb', line 118

def self.build_type(range)
  literals = []
  literals << :integer if range.include?(:Integer)
  literals << :float if range.include?(:Float)
  literals << :string if range.include?(:Text)
  literals << :string if range.include?(:URL)
  literals << :time if range.include?(:DateTime)

  literals << :hash
  # puts "building type for #{range}. literals: #{literals}"
  literals.uniq
end

.coerce_chronicle_edge(value) ⇒ Object 



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# File 'lib/chronicle/schema/validation/contract_factory.rb', line 107

def self.coerce_chronicle_edge(value)
  return value unless value.is_a?(Hash)

  type = (value[:@type] || value['@type']).to_sym
  contract_klass = Chronicle::Schema::Validation.get_contract(type)
  return value unless contract_klass

  result = contract_klass.schema.call(value)
  result.success? ? result.to_h : value
end

.create(type_id:, properties: []) ⇒ Object 



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# File 'lib/chronicle/schema/validation/contract_factory.rb', line 22

def self.create(type_id:, properties: [])
  Class.new(Chronicle::Schema::Validation::BaseContract) do
    type type_id

    params(Chronicle::Schema::Validation::ContractFactory.create_schema(type_id:, properties:))

    properties.each do |property|
      edge_name = property.id_snakecase

      if property.many?
        rule(edge_name).each do |index:|
          errors = edge_validator.validate(type_id, edge_name, value)

          error_path = [edge_name, index]
          messages = Chronicle::Schema::Validation::ContractFactory.process_errors(errors)
          messages.each do |path, message|
            key(error_path + path).failure(message)
          end
        end
      else
        rule(edge_name) do
          # handle nils. FIXME: this is a hack
          next unless value

          errors = edge_validator.validate(type_id, edge_name, value)
          error_path = [edge_name]
          messages = Chronicle::Schema::Validation::ContractFactory.process_errors(errors)
          messages.each do |path, message|
            key(error_path + path).failure(message)
          end
        end
      end
    end
  end
end

.create_schema(type_id:, properties: []) ⇒ Object 



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# File 'lib/chronicle/schema/validation/contract_factory.rb', line 58

def self.create_schema(type_id:, properties: [])
  Dry::Schema.JSON do
    required(:@type).value(:str?).filled(eql?: type_id.to_s)

    before(:key_coercer) do |result|
      result.to_h.transform_keys!(&:to_sym)

      valid_property_ids = properties.map(&:id_snakecase)
      valid_property_ids << :@type
      invalid_properties = result.to_h.keys - valid_property_ids

      invalid_properties.each do |invalid_property|
        result.add_error([:unexpected_key, [invalid_property.to_sym, []]])
      end
    end

    # Attempt to coerce chronicle edges recursively
    # I tried to use a custom type in the schema and use the constructor
    # method to do the coercion but it didn't work consistently
    before(:value_coercer) do |obj|
      obj.to_h.transform_values do |value|
        case value
        when ::Array
          value.map do |v|
            Chronicle::Schema::Validation::ContractFactory.coerce_chronicle_edge(v)
          end
        when ::Hash
          Chronicle::Schema::Validation::ContractFactory.coerce_chronicle_edge(value)
        else
          value
        end
      end
    end

    properties.each do |property|
      property_name = property.id_snakecase
      type = Chronicle::Schema::Validation::ContractFactory.build_type(property.range_identifiers)

      outer_macro = property.required? ? :required : :optional

      if property.many?
        send(outer_macro, property_name).value(:array).each(type)
      else
        send(outer_macro, property_name).value(type)
      end
    end
  end
end

.process_errors(errors) ⇒ Object 



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# File 'lib/chronicle/schema/validation/contract_factory.rb', line 5

def self.process_errors(errors)
  messages = []
  errors.each do |key, value|
    base_path = key == :base ? [] : [key]
    if value.is_a?(Hash)
      value.each do |k, v|
        messages << [base_path + [k], v.first.to_s]
      end
    elsif value.is_a?(Array)
      messages << [base_path, value.first.to_s]
    else
      messages << [base_path, value.to_s]
    end
  end
  messages
end