import os

class editToolConfig(object):
    def addTool(self,toolName):
      galaxyhome=os.environ.get('GALAXY_HOME')
      f1=open(galaxyhome+'/tool_conf.xml','r')
      f1.seek(0,0)
      f2=open(galaxyhome+'/tool_conf_backup.xml','w')
      f2.seek(0,0)

      ##first copy everything upto WebServiceTool1.xml into another file f2
      line = f1.readline()
      f2.write(line)

      lineStripped=line.lstrip()
      lineStripped=lineStripped.rstrip()

      #add the workflow Web service invocation tool under Web Service Workflow Tools section
      while not lineStripped == '<section name="Web Service Workflow Tools" id="WebServiceWorkflow">':
        line = f1.readline()
        f2.write(line)
        lineStripped = line.lstrip()
        lineStripped=lineStripped.rstrip()
      else:
        print line

      ## add new tool to f2
      f2.write('    <tool file="WebServiceToolWorkflow/workflowclients/'+toolName + '.xml"/>\n')

      ## copy rest of f1 into f2
      while not lineStripped == '</toolbox>':
        line = f1.readline()
        f2.write(line)
        lineStripped = line.lstrip()
        lineStripped=lineStripped.rstrip()        
      else:
        print line

      ##close f1 and f2
      f1.close()
      f2.close()

      ##interchange modes of f1 and f2
      f1=open(galaxyhome+'/tool_conf.xml','w')
      f1.seek(0,0)
      f2=open(galaxyhome+'/tool_conf_backup.xml','r')
      f2.seek(0,0)

      line = f2.readline()
      f1.write(line)

      lineStripped=line.lstrip()

      ##write entire f2 into f1 (reverse roles)
      while not lineStripped == '</toolbox>\n':
        line = f2.readline()
        f1.write(line)
        lineStripped = line.lstrip()
        lineStripped=lineStripped.rstrip()        
      else:
        print line

      f1.close()
      f2.close()