Module: GrapeSwagger::DocMethods

Defined in:
lib/grape-swagger/doc_methods.rb

Constant Summary collapse

PRIMITIVE_MAPPINGS =
{
  'integer' => %w(integer int32),
  'long' => %w(integer int64),
  'float' => %w(number float),
  'double' => %w(number double),
  'byte' => %w(string byte),
  'date' => %w(string date),
  'dateTime' => %w(string date-time)
}

Instance Method Summary collapse

Instance Method Details

#as_markdown(description) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 17

def as_markdown(description)
  description && @@markdown ? @@markdown.as_markdown(strip_heredoc(description)) : description
end

#content_types_for(target_class) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 121

def content_types_for(target_class)
  content_types = (target_class.content_types || {}).values

  if content_types.empty?
    formats       = [target_class.format, target_class.default_format].compact.uniq
    formats       = Grape::Formatter::Base.formatters({}).keys if formats.empty?
    content_types = Grape::ContentTypes::CONTENT_TYPES.select { |content_type, _mime_type| formats.include? content_type }.values
  end

  content_types.uniq
end

#generate_typeref(type) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 275

def generate_typeref(type)
  type_s = type.to_s.sub(/^[A-Z]/) { |f| f.downcase }
  if is_primitive? type_s
    { 'type' => type_s }
  else
    { '$ref' => parse_entity_name(type) }
  end
end

#hide_documentation_pathObject


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# File 'lib/grape-swagger/doc_methods.rb', line 312

def hide_documentation_path
  @@hide_documentation_path
end

#is_primitive?(type) ⇒ Boolean


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# File 'lib/grape-swagger/doc_methods.rb', line 271

def is_primitive?(type)
  %w(object integer long float double string byte boolean date dateTime).include? type
end

#models_with_included_presenters(models) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 248

def models_with_included_presenters(models)
  all_models = models

  models.each do |model|
    # get model references from exposures with a documentation
    nested_models = model.exposures.map do |_, config|
      if config.key?(:documentation)
        model = config[:using]
        model.respond_to?(:constantize) ? model.constantize : model
      end
    end.compact

    # get all nested models recursively
    additional_models = nested_models.map do |nested_model|
      models_with_included_presenters([nested_model])
    end.flatten

    all_models += additional_models
  end

  all_models
end

#mount_pathObject


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# File 'lib/grape-swagger/doc_methods.rb', line 316

def mount_path
  @@mount_path
end

#nameObject


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# File 'lib/grape-swagger/doc_methods.rb', line 13

def name
  @@class_name
end

#parse_base_path(base_path, request) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 302

def parse_base_path(base_path, request)
  if base_path.is_a?(Proc)
    base_path.call(request)
  elsif base_path.is_a?(String)
    URI(base_path).relative? ? URI.join(request.base_url, base_path).to_s : base_path
  else
    request.base_url
  end
end

#parse_entity_models(models) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 194

def parse_entity_models(models)
  result = {}
  models.each do |model|
    name       = (model.instance_variable_get(:@root) || parse_entity_name(model))
    properties = {}
    required   = []

    model.documentation.each do |property_name, property_info|
      p = property_info.dup

      required << property_name.to_s if p.delete(:required)

      type = if p[:type]
               p.delete(:type)
             else
               exposure = model.exposures[property_name]
               parse_entity_name(exposure[:using]) if exposure
             end

      if p.delete(:is_array)
        p[:items] = generate_typeref(type)
        p[:type] = 'array'
      else
        p.merge! generate_typeref(type)
      end

      # rename Grape Entity's "desc" to "description"
      property_description = p.delete(:desc)
      p[:description] = property_description if property_description

      # rename Grape's 'values' to 'enum'
      select_values = p.delete(:values)
      if select_values
        select_values = select_values.call if select_values.is_a?(Proc)
        p[:enum] = select_values
      end

      if PRIMITIVE_MAPPINGS.key?(p['type'])
        p['type'], p['format'] = PRIMITIVE_MAPPINGS[p['type']]
      end

      properties[property_name] = p
    end

    result[name] = {
      id:         name,
      properties: properties
    }
    result[name].merge!(required: required) unless required.empty?
  end

  result
end

#parse_entity_name(model) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 183

def parse_entity_name(model)
  if model.respond_to?(:entity_name)
    model.entity_name
  else
    name = model.to_s
    entity_parts = name.split('::')
    entity_parts.reject! { |p| p == 'Entity' || p == 'Entities' }
    entity_parts.join('::')
  end
end

#parse_header_params(params) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 144

def parse_header_params(params)
  params ||= []

  params.map do |param, value|
    data_type     = 'string'
    description   = value.is_a?(Hash) ? value[:description] : ''
    required      = value.is_a?(Hash) ? !!value[:required] : false
    default_value = value.is_a?(Hash) ? value[:default] : nil
    param_type    = 'header'

    parsed_params = {
      paramType:    param_type,
      name:         param,
      description:  as_markdown(description),
      type:         data_type,
      required:     required
    }

    parsed_params.merge!(defaultValue: default_value) if default_value

    parsed_params
  end
end

#parse_http_codes(codes, models) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 284

def parse_http_codes(codes, models)
  codes ||= {}
  codes.map do |k, v, m|
    models << m if m
    http_code_hash = {
      code: k,
      message: v
    }
    http_code_hash[:responseModel] = parse_entity_name(m) if m
    http_code_hash
  end
end

#parse_info(info) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 133

def parse_info(info)
  {
    contact:            info[:contact],
    description:        as_markdown(info[:description]),
    license:            info[:license],
    licenseUrl:         info[:license_url],
    termsOfServiceUrl:  info[:terms_of_service_url],
    title:              info[:title]
  }.delete_if { |_, value| value.blank? }
end

#parse_params(params, path, method) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 21

def parse_params(params, path, method)
  params ||= []

  parsed_array_params = parse_array_params(params)

  non_nested_parent_params = get_non_nested_params(parsed_array_params)

  non_nested_parent_params.map do |param, value|
    items = {}

    raw_data_type = value[:type] if value.is_a?(Hash)
    raw_data_type ||= 'string'
    data_type     = case raw_data_type.to_s
                    when 'Hash'
                      'object'
                    when 'Rack::Multipart::UploadedFile'
                      'File'
                    when 'Virtus::Attribute::Boolean'
                      'boolean'
                    when 'Boolean', 'Date', 'Integer', 'String', 'Float'
                      raw_data_type.to_s.downcase
                    when 'BigDecimal'
                      'long'
                    when 'DateTime'
                      'dateTime'
                    when 'Numeric'
                      'double'
                    when 'Symbol'
                      'string'
                    when /^\[(?<type>.*)\]$/
                      items[:type] = Regexp.last_match[:type].downcase
                      if PRIMITIVE_MAPPINGS.key?(items[:type])
                        items[:type], items[:format] = PRIMITIVE_MAPPINGS[items[:type]]
                      end
                      'array'
                    else
                      @@documentation_class.parse_entity_name(raw_data_type)
                    end

    additional_documentation = value.is_a?(Hash) ? value[:documentation] : nil

    if additional_documentation && value.is_a?(Hash)
      value = additional_documentation.merge(value)
    end

    description          = value.is_a?(Hash) ? value[:desc] || value[:description] : ''
    required             = value.is_a?(Hash) ? !!value[:required] : false
    default_value        = value.is_a?(Hash) ? value[:default] : nil
    example              = value.is_a?(Hash) ? value[:example] : nil
    is_array             = value.is_a?(Hash) ? (value[:is_array] || false) : false
    values               = value.is_a?(Hash) ? value[:values] : nil
    enum_or_range_values = parse_enum_or_range_values(values)

    if value.is_a?(Hash) && value.key?(:documentation) && value[:documentation].key?(:param_type)
      param_type  = value[:documentation][:param_type]
      if is_array
        items     = { '$ref' => data_type }
        data_type = 'array'
      end
    else
      param_type  = case
                    when path.include?(":#{param}")
                      'path'
                    when %w(POST PUT PATCH).include?(method)
                      if is_primitive?(data_type)
                        'form'
                      else
                        'body'
                      end
                    else
                      'query'
                    end
    end
    name          = (value.is_a?(Hash) && value[:full_name]) || param

    parsed_params = {
      paramType:     param_type,
      name:          name,
      description:   as_markdown(description),
      type:          data_type,
      required:      required,
      allowMultiple: is_array
    }

    if PRIMITIVE_MAPPINGS.key?(data_type)
      parsed_params[:type], parsed_params[:format] = PRIMITIVE_MAPPINGS[data_type]
    end

    parsed_params[:items]  = items   if items.present?

    parsed_params[:defaultValue] = example if example
    if default_value && example.blank?
      parsed_params[:defaultValue] = default_value
    end

    parsed_params.merge!(enum_or_range_values) if enum_or_range_values
    parsed_params
  end
end

#parse_path(path, version) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 168

def parse_path(path, version)
  # adapt format to swagger format
  parsed_path = path.sub(/\(\..*\)$/, @@hide_format ? '' : '.{format}')

  # This is attempting to emulate the behavior of
  # Rack::Mount::Strexp. We cannot use Strexp directly because
  # all it does is generate regular expressions for parsing URLs.
  # TODO: Implement a Racc tokenizer to properly generate the
  # parsed path.
  parsed_path = parsed_path.gsub(/:([a-zA-Z_]\w*)/, '{\1}')

  # add the version
  version ? parsed_path.gsub('{version}', version) : parsed_path
end

#setup(options) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 320

def setup(options)
  defaults = {
    target_class: nil,
    mount_path: '/swagger_doc',
    base_path: nil,
    api_version: '0.1',
    markdown: nil,
    hide_documentation_path: false,
    hide_format: false,
    format: nil,
    models: [],
    info: {},
    authorizations: nil,
    root_base_path: true,
    api_documentation: { desc: 'Swagger compatible API description' },
    specific_api_documentation: { desc: 'Swagger compatible API description for specific API' }
  }

  options = defaults.merge(options)

  target_class     = options[:target_class]
  @@mount_path     = options[:mount_path]
  @@class_name     = options[:class_name] || options[:mount_path].gsub('/', '')
  @@markdown       = options[:markdown] ? GrapeSwagger::Markdown.new(options[:markdown]) : nil
  @@hide_format    = options[:hide_format]
  api_version      = options[:api_version]
  authorizations   = options[:authorizations]
  root_base_path   = options[:root_base_path]
  extra_info       = options[:info]
  api_doc          = options[:api_documentation].dup
  specific_api_doc = options[:specific_api_documentation].dup
  @@models         = options[:models] || []

  @@hide_documentation_path = options[:hide_documentation_path]

  if options[:format]
    [:format, :default_format, :default_error_formatter].each do |method|
      send(method, options[:format])
    end
  end

  @@documentation_class = self

  desc api_doc.delete(:desc), api_doc
  get @@mount_path do
    header['Access-Control-Allow-Origin']   = '*'
    header['Access-Control-Request-Method'] = '*'

    namespaces = target_class.combined_namespaces
    namespace_routes = target_class.combined_namespace_routes

    if @@hide_documentation_path
      namespace_routes.reject! { |route, _value| "/#{route}/".index(@@documentation_class.parse_path(@@mount_path, nil) << '/') == 0 }
    end

    namespace_routes_array = namespace_routes.keys.map do |local_route|
      next if namespace_routes[local_route].map(&:route_hidden).all? { |value| value.respond_to?(:call) ? value.call : value }

      url_format  = '.{format}' unless @@hide_format

      original_namespace_name = target_class.combined_namespace_identifiers.key?(local_route) ? target_class.combined_namespace_identifiers[local_route] : local_route
      description = namespaces[original_namespace_name] && namespaces[original_namespace_name].options[:desc]
      description ||= "Operations about #{original_namespace_name.pluralize}"

      {
        path: "/#{local_route}#{url_format}",
        description: description
      }
    end.compact

    output = {
      apiVersion:     api_version,
      swaggerVersion: '1.2',
      produces:       @@documentation_class.content_types_for(target_class),
      apis:           namespace_routes_array,
      info:           @@documentation_class.parse_info(extra_info)
    }

    output[:authorizations] = authorizations unless authorizations.nil? || authorizations.empty?

    output
  end

  desc specific_api_doc.delete(:desc), { params: {
    'name' => {
      desc: 'Resource name of mounted API',
      type: 'string',
      required: true
    }
  }.merge(specific_api_doc.delete(:params) || {}) }.merge(specific_api_doc)

  get "#{@@mount_path}/:name" do
    header['Access-Control-Allow-Origin']   = '*'
    header['Access-Control-Request-Method'] = '*'

    models = []
    routes = target_class.combined_namespace_routes[params[:name]]
    error!('Not Found', 404) unless routes

    visible_ops = routes.reject do |route|
      route.route_hidden.respond_to?(:call) ? route.route_hidden.call : route.route_hidden
    end

    ops = visible_ops.group_by do |route|
      @@documentation_class.parse_path(route.route_path, api_version)
    end

    error!('Not Found', 404) unless ops.any?

    apis = []

    ops.each do |path, op_routes|
      operations = op_routes.map do |route|
        notes       = @@documentation_class.as_markdown(route.route_notes)

        http_codes  = @@documentation_class.parse_http_codes(route.route_http_codes, models)

        models |= @@models if @@models.present?

        models |= Array(route.route_entity) if route.route_entity.present?

        models = @@documentation_class.models_with_included_presenters(models.flatten.compact)

        operation = {
          notes: notes.to_s,
          summary: route.route_description || '',
          nickname: route.route_nickname || (route.route_method + route.route_path.gsub(/[\/:\(\)\.]/, '-')),
          method: route.route_method,
          parameters: @@documentation_class.parse_header_params(route.route_headers) + @@documentation_class.parse_params(route.route_params, route.route_path, route.route_method),
          type: route.route_is_array ? 'array' : 'void'
        }
        operation[:authorizations] = route.route_authorizations unless route.route_authorizations.nil? || route.route_authorizations.empty?
        if operation[:parameters].any? { |param| param[:type] == 'File' }
          operation.merge!(consumes: ['multipart/form-data'])
        end
        operation.merge!(responseMessages: http_codes) unless http_codes.empty?

        if route.route_entity
          type = @@documentation_class.parse_entity_name(Array(route.route_entity).first)
          if route.route_is_array
            operation.merge!(items: { '$ref' => type })
          else
            operation.merge!(type: type)
          end
        end

        operation[:nickname] = route.route_nickname if route.route_nickname
        operation
      end.compact
      apis << {
        path: path,
        operations: operations
      }
    end

    # use custom resource naming if available
    if target_class.combined_namespace_identifiers.key? params[:name]
      resource_path = target_class.combined_namespace_identifiers[params[:name]]
    else
      resource_path = params[:name]
    end
    api_description = {
      apiVersion:     api_version,
      swaggerVersion: '1.2',
      resourcePath:   "/#{resource_path}",
      produces:       @@documentation_class.content_types_for(target_class),
      apis:           apis
    }

    base_path                        = @@documentation_class.parse_base_path(options[:base_path], request)
    api_description[:basePath]       = base_path if base_path && base_path.size > 0 && root_base_path != false
    api_description[:models]         = @@documentation_class.parse_entity_models(models) unless models.empty?
    api_description[:authorizations] = authorizations if authorizations

    api_description
  end
end

#strip_heredoc(string) ⇒ Object


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# File 'lib/grape-swagger/doc_methods.rb', line 297

def strip_heredoc(string)
  indent = string.scan(/^[ \t]*(?=\S)/).min.try(:size) || 0
  string.gsub(/^[ \t]{#{indent}}/, '')
end