Module: Norton::Timestamp::ClassMethods

Defined in:
lib/norton/timestamp.rb

Instance Method Summary collapse

Instance Method Details

#timestamp(name, options = {}) ⇒ type

timestamp Define a timestamp

Parameters:

  • name (type) —
    description
  • touches={} —
    type
    description

Returns:

  • (type) —
    description 


16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
 
# File 'lib/norton/timestamp.rb', line 16

def timestamp(name, options={})
  register_norton_value(name, :timestamp, options)
  redis = norton_value_redis_pool(name)

  # Redis: GET
  define_method(name) do
    return instance_variable_get("@#{name}") if instance_variable_defined?("@#{name}")

    value = redis.with do |conn|
      raw_value = conn.get(norton_value_key(name))
      break raw_value if raw_value.present?

      send("#{name}_default_value").tap do |default_value|
        conn.set(norton_value_key(name), default_value)
      end
    end
    if value.nil? && options[:allow_nil]
      instance_variable_set("@#{name}", nil)
    else
      instance_variable_set("@#{name}", value.to_i)
    end
  end

  define_method("#{name}_default_value") do
    return nil if options[:allow_nil]
    return (Time.current.to_f * 1000).to_i if options[:digits] == 13

    Time.current.to_i
  end

  # Redis: SET
  define_method("touch_#{name}") do
    value = options[:digits] == 13 ? (Time.current.to_f * 1000).to_i : Time.current.to_i

    redis.with do |conn|
      conn.set(norton_value_key(name), value)
    end
    instance_variable_set("@#{name}", value)
  end

  # Redis: DEL
  define_method("remove_#{name}") do
    redis.with do |conn|
      conn.del(norton_value_key(name))
    end
    remove_instance_variable("@#{name}") if instance_variable_defined?("@#{name}")
  end
  send(:after_destroy, "remove_#{name}".to_sym) if respond_to? :after_destroy

  # Add callback
  if options[:touch_on].present?
    options[:touch_on].each do |callback, condition|
      self.send callback, proc{ if instance_eval(&condition) then instance_eval("touch_#{name}") end }
    end
  end
end