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# frozen_string_literal: true
class Serega
module SeregaPlugins
module Preloads
#
# Finds preloads for provided attributes plan
#
class PreloadsConstructor
class << self
#
# Constructs preloads hash for given attributes plan
#
# @param plan [Array<Serega::PlanPoint>] Serialization plan
#
# @return [Hash]
#
def call(plan)
return FROZEN_EMPTY_HASH unless plan
preloads = {}
append_many(preloads, plan)
preloads
end
private
def append_many(preloads, plan)
plan.points.each do |point|
current_preloads = point.attribute.preloads
next unless current_preloads
child_plan = point.child_plan
current_preloads = SeregaUtils::EnumDeepDup.call(current_preloads) if child_plan
append_current(preloads, current_preloads)
next unless child_plan
child_preloads = dig?(preloads, point.preloads_path)
append_many(child_preloads, child_plan)
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 dig?(hash, path)
return hash if !path || path.empty?
path.each do |point|
hash = hash[point]
end
hash
end
end
end
end
end
end
Version data entries
3 entries across 3 versions & 1 rubygems