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Contents
# frozen_string_literal: true
require_relative 'switch/case'
module Realize
class Logical
# This type of transformer can be categorized as a "comparator", meaning its intended
# desire is not a value resolution or value formatting, but a branching resolution.
# Specifically, you can define cases where, if the value matches, the transformers for the
# case would be executed. If no case is matched then the default_transformers will be
# executed.
class Switch
acts_as_hashable
attr_reader :cases, :default_transformers, :key
def initialize(cases: [], default_transformers: [], key:)
raise ArgumentError, 'key is required' if key.to_s.empty?
@cases = Case.array(cases)
@default_transformers = Transformers.array(default_transformers)
@key = key
freeze
end
def transform(resolver, value, time, record)
resolved_value = resolver.get(record, key)
matched_case = cases.find { |c| c.match?(resolved_value) }
transformers = matched_case ? matched_case.transformers : default_transformers
return value if transformers.empty?
transformers.inject(value) do |memo, transformer|
transformer.transform(resolver, memo, time, record)
end
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems