class BemHtml

# File lib/bem_html.rb, line 5
def self.parse(content)
        html_doc = Nokogiri::HTML(content)
        html_doc.xpath('.//*[@bem-block]|*[@bem-block]').each do |blockNode|
                currentBlock = blockNode["bem-block"]
                blockNode.attributes["bem-block"].remove
                if(not blockNode['class'])
                        blockNode['class'] = ""
                end
                blockNode['class'] += " #{currentBlock}"
                if(blockNode.attributes["bem-modifiers"])
                        nextBlock = [currentBlock]
                        JSON.parse(blockNode.attributes["bem-modifiers"].value.gsub(/\:(\w+)/,'"\1"')).each do |modifier|
                                nextBlock.push("#{currentBlock}--#{modifier}")
                                blockNode['class'] += " #{currentBlock}--#{modifier}"
                        end
                        blockNode.attributes["bem-modifiers"].remove
                else
                        nextBlock = currentBlock
                end
                processingQueue = [blockNode.children]
                while processingQueue.length > 0
                        nodes = processingQueue.shift
                        nodes.each do |node|
                                next if not node.attributes
                                next if node.attributes["bem-block"]
                                next if not node.attributes["bem-element"]
                        
                                if(not node['class'])
                                        node['class'] = ""
                                end
                        
                                element = node.attributes["bem-element"]
                                node.attributes["bem-element"].remove
                                if(currentBlock.respond_to? :push)
                                        node['class'] += " #{cb}__#{element}"
                                else
                                        node['class'] += " #{currentBlock}__#{element}"
                                end
                        
                                if(node.attributes["bem-modifiers"])
                                        JSON.parse(node.attributes["bem-modifiers"].value.gsub(/\:(\w+)/,'"\1"')).each do |modifier|
                                                if(currentBlock.respond_to? :push)
                                                        currentBlock.each do |cb|
                                                                node['class'] += " #{cb}__#{element}--#{modifier}"
                                                        end
                                                else
                                                        node['class'] += " #{currentBlock}__#{element}--#{modifier}"
                                                end
                                        end
                                        node.attributes["bem-modifiers"].remove
                                end
                                node['class'] = node['class'].lstrip
                                if(node.children.length > 0)
                                        processingQueue.push(node.children)
                                end
                        end
                end
        end
        html_doc.to_s
end