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Contents
# frozen_string_literal: true
require "dry-struct"
require "dry-transformer"
require "json"
module DjiMqttConnect
module Thing::Product
class RequestsMarshal < MessageMarshal
include Utils::MessageParsing
# Rename pesky `method` argument to `_method` and makes a copy of the raw data
class AttributeTransformer < Dry::Transformer::Pipe
import Dry::Transformer::HashTransformations
define! do
copy_keys "data" => "_data"
rename_keys "method" => "_method"
end
end
# Attempts to look a the method attribute, and builds a specific Message class for the message
def load(raw_message)
# Parse the message from JSON
parsed_message = JSON.parse(raw_message)
# Transform the message
transformed_message = attribute_transformer.call(parsed_message)
message_method = transformed_message["_method"]
# Build an instance of the class, or a generic message from the current class
message_class = message_class_from_message_method(message_method, RequestsMessage)
message_class.new transformed_message
rescue JSON::ParserError => e
raise ParseError.new(e, "Unable to parse message as JSON")
rescue Dry::Struct::Error => e
raise ParseError.new(e, "Unexpected #{message_class} payload")
end
private
def attribute_transformer
@attribute_transformer ||= AttributeTransformer.new
end
end
end
end
Version data entries
28 entries across 28 versions & 1 rubygems