package org.apache.maven.plugin.jira;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import java.text.NumberFormat;

 import java.text.ParsePosition;

 import org.apache.commons.httpclient.HttpClient;

 import org.apache.commons.httpclient.methods.GetMethod;

 import org.apache.maven.plugin.logging.Log;

 /**

  * A helper class with common JIRA related functionality.

  *

  * @author Dennis Lundberg

  * @version $Id: org.apache.maven.plugin.jira.JiraHelper.html 816588 2012-05-08 12:37:27Z hboutemy $

  */

 public class JiraHelper

 {

     private static final String PID = "pid=";

     /**

      * Try to get a JIRA pid from the issue management URL.

      *

      * @param log     Used to tell the user what happened

      * @param issueManagementUrl The URL to the issue management system

      * @param client  The client used to connect to JIRA

      * @return The JIRA id for the project, or null if it can't be found

      */

     public static String getPidFromJira( Log log, String issueManagementUrl, HttpClient client )

     {

         String jiraId = null;

         GetMethod gm = new GetMethod( issueManagementUrl );

         String projectPage;

         try

         {

             client.executeMethod( gm );

             log.debug( "Successfully reached JIRA." );

             projectPage = gm.getResponseBodyAsString();

         }

         catch ( Exception e )

         {

             if ( log.isDebugEnabled() )

             {

                 log.error( "Unable to reach the JIRA project page:", e );

             }

             else

             {

                 log.error( "Unable to reach the JIRA project page. Cause is: " + e.getLocalizedMessage() );

             }

             return null;

         }

         int pidIndex = projectPage.indexOf( PID );

         if ( pidIndex == -1 )

         {

             log.error( "Unable to extract a JIRA pid from the page at the url " + issueManagementUrl );

         }

         else

         {

             NumberFormat nf = NumberFormat.getInstance();

             Number pidNumber = nf.parse( projectPage, new ParsePosition( pidIndex + PID.length() ) );

             jiraId = Integer.toString( pidNumber.intValue() );

             log.debug( "Found the pid " + jiraId + " at " + issueManagementUrl );

         }

         return jiraId;

     }

 }