lib/zhong/every.rb in zhong-0.1.4 vs lib/zhong/every.rb in zhong-0.1.5

@@ -1,28 +1,49 @@
 module Zhong
   class Every
     class FailedToParse < StandardError; end
 
     EVERY_KEYWORDS = {
+      minute: 1.minute,
+      hour: 1.hour,
       day: 1.day,
       week: 1.week,
       month: 1.month,
-      semiannual: 6.months, # enterprise!
       year: 1.year,
       decade: 10.years
     }.freeze
 
     def initialize(period)
       @period = period
+
+      fail "`every` must be >= 1 second" unless valid?
     end
 
+    def to_s
+      EVERY_KEYWORDS.to_a.reverse.each do |friendly, period|
+        if @period % period == 0
+          rem = @period / period
+
+          if rem == 1
+            return "#{rem} #{friendly}"
+          else
+            return "#{rem} #{friendly}s"
+          end
+        end
+      end
+
+      "#{@period.to_i} second#{@period.to_i == 1 ? '' : 's'}"
+    end
+
+    private def valid?
+      @period.to_f >= 1
+    end
+
     def next_at(last = Time.now)
       last + @period
     end
 
     def self.parse(every)
-      return unless every
-
       case every
       when Numeric, ActiveSupport::Duration
         new(every)
       when String, Symbol
         key = every.downcase.to_sym