Module: GrpcRest

Defined in:
lib/grpc_rest.rb,
lib/grpc_rest/version.rb

Constant Summary collapse

VERSION = 
'0.1.12'

Class Method Summary collapse

Class Method Details

.assign_params(request, param_hash, body_string, params) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 85

def assign_params(request, param_hash, body_string, params)
  parameters = params.to_h.deep_dup
  # each instance of {variable} means that we set the corresponding param variable into the
  # Protobuf request
  # The variable pattern could have dots which indicate we need to drill into the request
  # to set it - e.g. {subrecord.foo} means we need to set the value of `request.subrecord.foo` to `params[:foo].`
  # We can also do simple wildcard replacement if there's a * - for example, {name=something-*}
  # means we should set `request.name` to "something-#{params[:name]}".
  param_hash.each do |entry|
    name_tokens = entry[:split_name]
    value_to_use = parameters.delete(name_tokens.last)
    if entry[:val]
      regex = entry[:val].tr('*', '')
      value_to_use = value_to_use.gsub(regex, '')
    end
    assign_value(request, entry[:name], value_to_use)
  end
  if body_string.present? && body_string != '*'
    # we need to "splat" the body parameters into the given sub-record rather than into the top-level.
    sub_record = sub_field(request, body_string, parameters)
  end
end

.assign_value(proto, path, value) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 30

def assign_value(proto, path, value)
  tokens = path.split('.')
  tokens[0...-1].each do |path_seg|
    proto = sub_field(proto, path_seg, {})
    return if proto.nil?
  end
  proto.public_send(:"#{tokens.last}=", value) if proto.respond_to?(:"#{tokens.last}=")
end

.error_msg(error) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 108

def error_msg(error)
  {
      code: 3,
      message: "InvalidArgument: #{error.message}",
      details: [
                {
                  backtrace: error.backtrace
                }
      ]
  }
end

.init_request(request_class, params) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 80

def init_request(request_class, params)
  map_proto_type(request_class.descriptor, params)
  request_class.new(params)
end

.map_proto_type(proto, params) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 39

def map_proto_type(proto, params)
  proto.to_a.each do |descriptor|
    field = descriptor.name
    val = params[field]
    next if val.nil?
    next if descriptor.subtype.is_a?(Google::Protobuf::EnumDescriptor)

    case descriptor.type
    when *%i(int32 int64 uint32 uint64 sint32 sint64 fixed32 fixed64 sfixed32 sfixed64)
      params[field] = val.to_i
    when *%i(float double)
      params[field] = val.to_f
    when :bool
      params[field] = !!val
    end

    case descriptor.subtype&.name
    when 'google.protobuf.Struct'
      params[field] = Google::Protobuf::Struct.from_hash(val)
    when 'google.protobuf.Timestamp'
      if val.is_a?(Numeric)
        params[field] = Google::Protobuf::Timestamp.from_time(Time.at(val))
      else
        params[field] = Google::Protobuf::Timestamp.from_time(Time.new(val))
      end
    when 'google.protobuf.Value'
      params[field] = Google::Protobuf::Value.from_ruby(val)
    when 'google.protobuf.ListValue'
      params[field] = Google::Protobuf::ListValue.from_a(val)
    else
      if params[field].is_a?(Array)
        params[field].each do |item|
          map_proto_type(descriptor.subtype, item)
        end
      else
        map_proto_type(descriptor.subtype, params[field])
      end
    end
  end
end

.send_grpc_request(service, method, request) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 132

def send_grpc_request(service, method, request)
  klass = service.constantize::Service.subclasses.first
  klass.new.public_send(method, request)
end

.send_gruf_request(klass, service_obj, method, request) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 120

def send_gruf_request(klass, service_obj, method, request)
  ref = service_obj.rpc_descs[method.classify.to_sym]
  handler = klass.new(
    method_key: method.to_sym,
    service: service_obj,
    rpc_desc: ref,
    active_call: nil,
    message: request
  )
  handler.send(method.to_sym)
end

.send_request(service, method, request) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 137

def send_request(service, method, request)
  if defined?(Gruf)
    service_obj = service.constantize::Service
    klass = ::Gruf::Controllers::Base.subclasses.find do |k|
      k.bound_service == service_obj
    end
    if klass
      return send_gruf_request(klass, service_obj, method, request).to_h
    end
  end
  send_grpc_request(service, method, request).to_h
end

.sub_field(proto, name, parameters) ⇒ Object

Gets a sub record from a proto. If it doesn’t exist, initialize it and set it to the proto, then return it.



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# File 'lib/grpc_rest.rb', line 13

def sub_field(proto, name, parameters)
  existing = proto.public_send(name.to_sym)
  return existing if existing

  descriptor = proto.class.descriptor.to_a.find { |a| a.name == name }
  return nil if descriptor.nil?

  klass = descriptor.submsg_name.split('.').map(&:camelize).join('::').constantize
  params = klass.descriptor.to_a.map(&:name).to_h do |key|
    [key, parameters.delete(key)]
  end

  sub_record = klass.new(params)
  proto.public_send(:"#{name}=", sub_record)
  sub_record
end

.underscore(s) ⇒ Object 



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# File 'lib/grpc_rest.rb', line 7

def underscore(s)
  GRPC::GenericService.underscore(s)
end