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# encoding: utf-8

#

# Redmine - project management software

# Copyright (C) 2006-2011  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

module CalendarsHelper

  def link_to_previous_month(year, month, options={})

    target_year, target_month = if month == 1

                                  [year - 1, 12]

                                else

                                  [year, month - 1]

                                end

    name = if target_month == 12

             "#{month_name(target_month)} #{target_year}"

           else

             "#{month_name(target_month)}"

           end

    # \xc2\xab(utf-8) = «

    link_to_month(("\xc2\xab " + name), target_year, target_month, options)

  end

  def link_to_next_month(year, month, options={})

    target_year, target_month = if month == 12

                                  [year + 1, 1]

                                else

                                  [year, month + 1]

                                end

    name = if target_month == 1

             "#{month_name(target_month)} #{target_year}"

           else

             "#{month_name(target_month)}"

           end

    # \xc2\xbb(utf-8) = »

    link_to_month((name + " \xc2\xbb"), target_year, target_month, options)

  end

  def link_to_month(link_name, year, month, options={})

    link_to_content_update(h(link_name), params.merge(:year => year, :month => month))

  end

end