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Size: 1.65 KB
Versions: 54
Compression:
Stored size: 1.65 KB
Contents
# frozen_string_literal: true
class ReeObject::ToHash
include Ree::FnDSL
fn :to_hash
RecursiveObjectErr = Class.new(ArgumentError)
BASIC_TYPES = [
Date, Time, Numeric, String, FalseClass, TrueClass, NilClass, Symbol,
Module, Class
].freeze
contract(
Any => Or[Hash, ArrayOf[Any], *BASIC_TYPES]
).throws(RecursiveObjectErr)
def call(obj)
recursively_convert(obj, {}, {})
end
private
def recursively_convert(obj, acc, cache)
ancestors = obj.class.ancestors
if ancestors.intersection(BASIC_TYPES).size > 0
obj
elsif obj.is_a?(Array)
convert_array(obj, acc, cache)
elsif obj.is_a?(Hash)
convert_hash(obj, acc, cache)
elsif obj.respond_to?(:to_h)
convert_hash(obj.to_h, acc, cache)
else
convert_object(obj, acc, cache)
end
end
def convert_array(obj, acc, cache)
obj.map { |el| recursively_convert(el, {}, cache) }
end
def convert_hash(obj, acc, cache)
obj.each do |k, v|
key_sym = k.to_sym
acc[key_sym] = recursively_convert(v, {}, cache)
end
acc
end
def convert_object(obj, acc, cache)
return obj if obj.is_a?(Class) || obj.is_a?(Module)
if cache.key?(obj.object_id)
raise RecursiveObjectErr, "Recursive object found: #{obj}"
end
cache[obj.object_id] = true
obj.instance_variables.each do |var|
key_name = var.to_s.delete("@")
key_sym = key_name.to_sym
key = key_sym
value = obj.instance_variable_get(var)
acc[key] = recursively_convert(value, {}, cache)
end
cache.delete(obj.object_id)
acc
end
end
Version data entries
54 entries across 54 versions & 1 rubygems