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 #:nodoc:
Chris@909:   module CoreExtensions #:nodoc:
Chris@909:     module String #:nodoc:
Chris@909:       # Custom string conversions
Chris@909:       module Conversions
Chris@909:         # Parses hours format and returns a float
Chris@909:         def to_hours
Chris@909:           s = self.dup
Chris@909:           s.strip!
Chris@909:           if s =~ %r{^(\d+([.,]\d+)?)h?$}
Chris@909:             s = $1
Chris@909:           else
Chris@909:             # 2:30 => 2.5
Chris@909:             s.gsub!(%r{^(\d+):(\d+)$}) { $1.to_i + $2.to_i / 60.0 }
Chris@909:             # 2h30, 2h, 30m => 2.5, 2, 0.5
Chris@909:             s.gsub!(%r{^((\d+)\s*(h|hours?))?\s*((\d+)\s*(m|min)?)?$}) { |m| ($1 || $4) ? ($2.to_i + $5.to_i / 60.0) : m[0] }
Chris@909:           end
Chris@909:           # 2,5 => 2.5
Chris@909:           s.gsub!(',', '.')
Chris@909:           begin; Kernel.Float(s); rescue; nil; end
Chris@909:         end
Chris@909: 
Chris@909:         # Object#to_a removed in ruby1.9
Chris@909:         if RUBY_VERSION > '1.9'
Chris@909:           def to_a
Chris@909:             [self.dup]
Chris@909:           end
Chris@909:         end
Chris@909:       end
Chris@909:     end
Chris@909:   end
Chris@909: end