Chris@909: # Redmine - project management software
Chris@909: # Copyright (C) 2006-2011  Jean-Philippe Lang
Chris@909: #
Chris@909: # This program is free software; you can redistribute it and/or
Chris@909: # modify it under the terms of the GNU General Public License
Chris@909: # as published by the Free Software Foundation; either version 2
Chris@909: # of the License, or (at your option) any later version.
Chris@909: #
Chris@909: # This program is distributed in the hope that it will be useful,
Chris@909: # but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@909: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@909: # GNU General Public License for more details.
Chris@909: #
Chris@909: # You should have received a copy of the GNU General Public License
Chris@909: # along with this program; if not, write to the Free Software
Chris@909: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
Chris@909: 
Chris@909: module Redmine
Chris@909:   module Helpers
Chris@909: 
Chris@909:     # Simple class to compute the start and end dates of a calendar
Chris@909:     class Calendar
Chris@909:       include Redmine::I18n
Chris@909:       attr_reader :startdt, :enddt
Chris@909: 
Chris@909:       def initialize(date, lang = current_language, period = :month)
Chris@909:         @date = date
Chris@909:         @events = []
Chris@909:         @ending_events_by_days = {}
Chris@909:         @starting_events_by_days = {}
Chris@909:         set_language_if_valid lang
Chris@909:         case period
Chris@909:         when :month
Chris@909:           @startdt = Date.civil(date.year, date.month, 1)
Chris@909:           @enddt = (@startdt >> 1)-1
Chris@909:           # starts from the first day of the week
Chris@909:           @startdt = @startdt - (@startdt.cwday - first_wday)%7
Chris@909:           # ends on the last day of the week
Chris@909:           @enddt = @enddt + (last_wday - @enddt.cwday)%7
Chris@909:         when :week
Chris@909:           @startdt = date - (date.cwday - first_wday)%7
Chris@909:           @enddt = date + (last_wday - date.cwday)%7
Chris@909:         else
Chris@909:           raise 'Invalid period'
Chris@909:         end
Chris@909:       end
Chris@909: 
Chris@909:       # Sets calendar events
Chris@909:       def events=(events)
Chris@909:         @events = events
Chris@909:         @ending_events_by_days = @events.group_by {|event| event.due_date}
Chris@909:         @starting_events_by_days = @events.group_by {|event| event.start_date}
Chris@909:       end
Chris@909: 
Chris@909:       # Returns events for the given day
Chris@909:       def events_on(day)
Chris@909:         ((@ending_events_by_days[day] || []) + (@starting_events_by_days[day] || [])).uniq
Chris@909:       end
Chris@909: 
Chris@909:       # Calendar current month
Chris@909:       def month
Chris@909:         @date.month
Chris@909:       end
Chris@909: 
Chris@909:       # Return the first day of week
Chris@909:       # 1 = Monday ... 7 = Sunday
Chris@909:       def first_wday
Chris@909:         case Setting.start_of_week.to_i
Chris@909:         when 1
Chris@909:           @first_dow ||= (1 - 1)%7 + 1
Chris@909:         when 6
Chris@909:           @first_dow ||= (6 - 1)%7 + 1
Chris@909:         when 7
Chris@909:           @first_dow ||= (7 - 1)%7 + 1
Chris@909:         else
Chris@909:           @first_dow ||= (l(:general_first_day_of_week).to_i - 1)%7 + 1
Chris@909:         end
Chris@909:       end
Chris@909: 
Chris@909:       def last_wday
Chris@909:         @last_dow ||= (first_wday + 5)%7 + 1
Chris@909:       end
Chris@909:     end
Chris@909:   end
Chris@909: end