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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.

require 'blankslate'

module Redmine

  module Views

    module Builders

      class Structure < BlankSlate

        def initialize

          @struct = [{}]

        end

        def array(tag, options={}, &block)

          @struct << []

          block.call(self)

          ret = @struct.pop

          @struct.last[tag] = ret

          @struct.last.merge!(options) if options

        end

        def method_missing(sym, *args, &block)

          if args.any?

            if args.first.is_a?(Hash)

              if @struct.last.is_a?(Array)

                @struct.last << args.first unless block

              else

                @struct.last[sym] = args.first

              end

            else

              if @struct.last.is_a?(Array)

                @struct.last << (args.last || {}).merge(:value => args.first)

              else

                @struct.last[sym] = args.first

              end

            end

          end

          if block

            @struct << (args.first.is_a?(Hash) ? args.first : {})

            block.call(self)

            ret = @struct.pop

            if @struct.last.is_a?(Array)

              @struct.last << ret

            else

              if @struct.last.has_key?(sym) && @struct.last[sym].is_a?(Hash)

                @struct.last[sym].merge! ret

              else

                @struct.last[sym] = ret

              end

            end

          end

        end

        def output

          raise "Need to implement #{self.class.name}#output"

        end

      end

    end

  end

end