1  # Redmine - project management software
   2  # Copyright (C) 2006-2011  Jean-Philippe Lang
   3  #
   4  # This program is free software; you can redistribute it and/or
   5  # modify it under the terms of the GNU General Public License
   6  # as published by the Free Software Foundation; either version 2
   7  # of the License, or (at your option) any later version.
   8  #
   9  # This program is distributed in the hope that it will be useful,
  10  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  # GNU General Public License for more details.
  13  #
  14  # You should have received a copy of the GNU General Public License
  15  # along with this program; if not, write to the Free Software
  16  # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17 
  18  require 'blankslate'
  19 
  20  module Redmine
  21    module Views
  22      module Builders
  23        class Structure < BlankSlate
  24          def initialize
  25            @struct = [{}]
  26          end
  27 
  28          def array(tag, options={}, &block)
  29            @struct << []
  30            block.call(self)
  31            ret = @struct.pop
  32            @struct.last[tag] = ret
  33            @struct.last.merge!(options) if options
  34          end
  35 
  36          def method_missing(sym, *args, &block)
  37            if args.any?
  38              if args.first.is_a?(Hash)
  39                if @struct.last.is_a?(Array)
  40                  @struct.last << args.first unless block
  41                else
  42                  @struct.last[sym] = args.first
  43                end
  44              else
  45                if @struct.last.is_a?(Array)
  46                  if args.size == 1 && !block_given?
  47                    @struct.last << args.first
  48                  else
  49                    @struct.last << (args.last || {}).merge(:value => args.first)
  50                  end
  51                else
  52                  @struct.last[sym] = args.first
  53                end
  54              end
  55            end
  56 
  57            if block
  58              @struct << (args.first.is_a?(Hash) ? args.first : {})
  59              block.call(self)
  60              ret = @struct.pop
  61              if @struct.last.is_a?(Array)
  62                @struct.last << ret
  63              else
  64                if @struct.last.has_key?(sym) && @struct.last[sym].is_a?(Hash)
  65                  @struct.last[sym].merge! ret
  66                else
  67                  @struct.last[sym] = ret
  68                end
  69              end
  70            end
  71          end
  72 
  73          def output
  74            raise "Need to implement #{self.class.name}#output"
  75          end
  76        end
  77      end
  78    end
  79  end