Contents

module Depth
  module Actions
    #:nocov:
    def base
      raise NoMethodError.new('should be overridden')
    end
    #:nocov:

    def set(route, value)
      route = RouteElement.convert_route(route)
      object = route[0 ... -1].reduce(Traverser.new(base)) { |t, route_el|
        t.next_or_create(route_el.key) { route_el.create }
      }.object
      object[route.last.key] = value
    end

    def find(route, create: false, default: nil)
      route = RouteElement.convert_route(route)
      parent = route[0 ... -1].reduce(Traverser.new(base)) { |t, route_el|
        if create
          t.next_or_create(route_el.key) { route_el.create }
        else
          t.next(route_el.key)
        end
      }.object
      object = parent ? parent[route.last.key] : nil
      return object unless object.nil?
      return parent[route.last.key] = default if create && default
      default
    end

    def alter(route, key: nil, value: nil)
      return set(route, value) if key == nil
      route = RouteElement.convert_route(route)
      value = find(route) unless value
      new_route = (route[0 ... -1] << RouteElement.convert(key))
      set(new_route, value) # ensure it exists
      old_key = route.last.key
      return unless old_key != key
      delete(route)
    end

    def delete(route)
      route = RouteElement.convert_route(route)
      traverser = route[0...-1].reduce(Traverser.new(base)) do |t, route_el|
        t.next(route_el.key)
      end
      if traverser.array?
        traverser.object.delete_at(route.last.key)
      elsif traverser.hash?
        traverser.object.delete(route.last.key)
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
depth-0.3.0	lib/depth/actions.rb