remove datetag

app/logical/date_tag.rb

@@ -1,72 +0,0 @@
-class DateTag
-  attr_accessor :tag, :start_date, :end_date
-  
-  def self.new_from_range(start, stop)
-    new("#{start.to_formatted_s(:db)}..#{stop.to_formatted_s(:db)}")
-  end
-  
-  def initialize(tag)
-    @tag = tag
-  end
-  
-  def is_single_day?
-    tag =~ /^\d+-\d+-\d+$/
-  end
-  
-  def is_range?
-    !is_single_day
-  end
-  
-  def start_date
-    return date if is_single_day?
-    extract_ranges
-    start_date
-  end
-  
-  def end_date
-    return date if is_single_day?
-    extract_ranges
-    end_date
-  end
-  
-  def previous_week
-    DateTag.new_from_range(1.week.ago(start_date), 1.week.ago(end_date))
-  end
-  
-  def next_week
-    DateTag.new_from_range(1.week.since(start_date), 1.week.since(end_date))
-  end
-  
-  def previous_month
-    DateTag.new_from_range(1.month.ago(start_date), 1.month.ago(end_date))
-  end
-  
-  def next_month
-    DateTag.new_from_range(1.month.since(start_date), 1.month.since(end_date))
-  end
-  
-  def date
-    Date.parse(tag)
-  end
-  
-  private
-    def extract_ranges
-      case tag
-      when /\A(.+?)\.\.(.+)/
-        self.start_date = Date.parse($1)
-        self.end_date = Date.parse($2)
-
-      when /\A<(.+)/, /\A<=(.+)/, /\A\.\.(.+)/
-        self.start_date = 20.years.ago
-        self.end_date = Date.parse($1)
-
-      when /\A>(.+)/, /\A>=(.+)/, /\A(.+)\.\.\Z/
-        self.start_date = Date.parse($1)
-        self.end_date = Date.today
-
-      else
-        self.start_date = Date.today
-        self.end_date = Date.today
-      end
-    end
-end