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Contents
# frozen_string_literal: true
class Serega
module SeregaPlugins
module Preloads
#
# Finds relations to preload for provided serializer
#
class PreloadsConstructor
module ClassMethods
#
# Constructs preloads hash for given serializer
#
# @param serializer [Serega] Instance of Serega serializer
#
# @return [Hash]
#
def call(map)
return FROZEN_EMPTY_HASH unless map
preloads = {}
append_many(preloads, map)
preloads
end
private
def append_many(preloads, map)
map.each do |point|
current_preloads = point.attribute.preloads
next unless current_preloads
has_nested = point.has_nested_points?
current_preloads = SeregaUtils::EnumDeepDup.call(current_preloads) if has_nested
append_current(preloads, current_preloads)
next unless has_nested
nested_preloads = nested(preloads, point.preloads_path)
append_many(nested_preloads, point.nested_points)
end
end
def append_current(preloads, current_preloads)
merge(preloads, current_preloads) unless current_preloads.empty?
end
def merge(preloads, current_preloads)
preloads.merge!(current_preloads) do |_key, value_one, value_two|
merge(value_one, value_two)
end
end
def nested(preloads, path)
(!path || path.empty?) ? preloads : preloads.dig(*path)
end
end
extend ClassMethods
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems