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# 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 AttachmentsHelper

  # Displays view/delete links to the attachments of the given object

  # Options:

  #   :author -- author names are not displayed if set to false

  def link_to_attachments(container, options = {})

    options.assert_valid_keys(:author)

    if container.attachments.any?

      options = {:deletable => container.attachments_deletable?, :author => true}.merge(options)

      render :partial => 'attachments/links', :locals => {:attachments => container.attachments, :options => options}

    end

  end

  def to_utf8(str)

    if str.respond_to?(:force_encoding)

      str.force_encoding('UTF-8')

      return str if str.valid_encoding?

    else

      return str if /\A[\r\n\t\x20-\x7e]*\Z/n.match(str) # for us-ascii

    end

    begin

      Iconv.conv('UTF-8//IGNORE', 'UTF-8', str + '  ')[0..-3]

    rescue Iconv::InvalidEncoding

      # "UTF-8//IGNORE" is not supported on some OS

      str

    end

  end

end