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# redMine - project management software

# Copyright (C) 2008  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 Redmine #:nodoc:

  module CoreExtensions #:nodoc:

    module String #:nodoc:

      # Custom string conversions

      module Conversions

        # Parses hours format and returns a float

        def to_hours

          s = self.dup

          s.strip!

          if s =~ %r{^(\d+([.,]\d+)?)h?$}

            s = $1

          else

            # 2:30 => 2.5

            s.gsub!(%r{^(\d+):(\d+)$}) { $1.to_i + $2.to_i / 60.0 }

            # 2h30, 2h, 30m => 2.5, 2, 0.5

            s.gsub!(%r{^((\d+)\s*(h|hours?))?\s*((\d+)\s*(m|min)?)?$}) { |m| ($1 || $4) ? ($2.to_i + $5.to_i / 60.0) : m[0] }

          end

          # 2,5 => 2.5

          s.gsub!(',', '.')

          begin; Kernel.Float(s); rescue; nil; end

        end

        # Object#to_a removed in ruby1.9

        if RUBY_VERSION > '1.9'

          def to_a

            [self.dup]

          end

        end

      end

    end

  end

end