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 org.apache.commons.httpclient.Credentials;

 import org.apache.commons.httpclient.Header;

 import org.apache.commons.httpclient.HostConfiguration;

 import org.apache.commons.httpclient.HttpClient;

 import org.apache.commons.httpclient.HttpException;

 import org.apache.commons.httpclient.HttpState;

 import org.apache.commons.httpclient.HttpStatus;

 import org.apache.commons.httpclient.StatusLine;

 import org.apache.commons.httpclient.UsernamePasswordCredentials;

 import org.apache.commons.httpclient.params.HttpClientParams;

 import org.apache.commons.httpclient.auth.AuthScope;

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

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

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.settings.Proxy;

 import org.apache.maven.settings.Settings;

 import org.codehaus.plexus.util.StringUtils;

 import java.io.File;

 import java.io.FileWriter;

 import java.io.IOException;

 import java.io.PrintWriter;

 import java.util.HashMap;

 import java.util.Locale;

 import java.util.Map;

 /**

  * Gets relevant issues in RSS from a given JIRA installation.

  * <p/>

  * Based on version 1.1.2 and patch by Dr. Spock (MPJIRA-8).

  *

  * @author mfranken@xebia.com

  * @author jruiz@exist.com

  * @version $Id$

  */

 public abstract class AbstractJiraDownloader

 {

     /** Log for debug output. */

     private Log log;

     /** Output file for xml document. */

     private File output;

     /** The maximum number of entries to show. */

     private int nbEntriesMax;

     /** The filter to apply to query to JIRA. */

     private String filter;

     /** Ids of fix versions to show, as comma separated string. */

     private String fixVersionIds;

     /** Ids of status to show, as comma separated string. */

     private String statusIds;

     /** Ids of resolution to show, as comma separated string. */

     private String resolutionIds;

     /** Ids of priority to show, as comma separated string. */

     private String priorityIds;

     /** The component to show. */

     private String component;

     /** Ids of types to show, as comma separated string. */

     private String typeIds;

     /** Column names to sort by, as comma separated string. */

     private String sortColumnNames;

     /** The username to log into JIRA. */

     private String jiraUser;

     /** The password to log into JIRA. */

     private String jiraPassword;

     /** The username to log into webserver. */

     private String webUser;

     /** The password to log into webserver. */

     private String webPassword;

     /** The maven project. */

     private MavenProject project;

     /** The maven settings. */

     private Settings settings;

     /** Mapping containing all allowed JIRA status values. */

     protected Map statusMap = new HashMap();

     /** Mapping containing all allowed JIRA resolution values. */

     protected Map resolutionMap = new HashMap();

     /** Mapping containing all allowed JIRA priority values. */

     protected Map priorityMap = new HashMap();

     /** Mapping containing all allowed JIRA type values. */

     protected Map typeMap = new HashMap();

     /**

      * Creates a filter given the parameters and some defaults.

      *

      * @return request parameters to be added to URL used for downloading the JIRA issues

      */

     private String createFilter()

     {

         // If the user has defined a filter - use that

         if ( ( this.filter != null ) && ( this.filter.length() > 0 ) )

         {

             return this.filter;

         }

         StringBuffer localFilter = new StringBuffer();

         // add fix versions

         if ( fixVersionIds != null )

         {

             String[] fixVersions = fixVersionIds.split( "," );

             for ( int i = 0; i < fixVersions.length; i++ )

             {

                 if ( fixVersions[i].length() > 0 )

                 {

                     localFilter.append( "&fixfor=" + fixVersions[i].trim() );

                 }

             }

         }

         // get the Status Ids

         if ( statusIds != null )

         {

             String[] stats = statusIds.split( "," );

             for ( int i = 0; i < stats.length; i++ )

             {

                 String statusParam = (String) statusMap.get( stats[i] );

                 if ( statusParam != null )

                 {

                     localFilter.append( "&statusIds=" + statusParam );

                 }

             }

         }

         // get the Priority Ids

         if ( priorityIds != null )

         {

             String[] prios = priorityIds.split( "," );

             for ( int i = 0; i < prios.length; i++ )

             {

                 String priorityParam = (String) priorityMap.get( prios[i] );

                 if ( priorityParam != null )

                 {

                     localFilter.append( "&priorityIds=" + priorityParam );

                 }

             }

         }

         // get the Resolution Ids

         if ( resolutionIds != null )

         {

             String[] resos = resolutionIds.split( "," );

             for ( int i = 0; i < resos.length; i++ )

             {

                 String resoParam = (String) resolutionMap.get( resos[i] );

                 if ( resoParam != null )

                 {

                     localFilter.append( "&resolutionIds=" + resoParam );

                 }

             }

         }

         // add components

         if ( component != null )

         {

             String[] components = component.split( "," );

             for ( int i = 0; i < components.length; i++ )

             {

                 if ( components[i].length() > 0 )

                 {

                     localFilter.append( "&component=" + components[i] );

                 }

             }

         }

         // get the Type Ids

         if ( typeIds != null )

         {

             String[] types = typeIds.split( "," );

             for ( int i = 0; i < types.length; i++ )

             {

                 String typeParam = (String) typeMap.get( types[i].trim() );

                 if ( typeParam != null )

                 {

                     localFilter.append( "&type=" + typeParam );

                 }

             }

         }

         // get the Sort order

         int validSortColumnNames = 0;

         if ( sortColumnNames != null )

         {

             String[] sortColumnNamesArray = sortColumnNames.split( "," );

             // N.B. Add in reverse order (it's the way JIRA likes it!!)

             for ( int i = sortColumnNamesArray.length - 1; i >= 0; i-- )

             {

                 String lowerColumnName = sortColumnNamesArray[i].trim().toLowerCase( Locale.ENGLISH );

                 boolean descending = false;

                 String fieldName = null;

                 if ( lowerColumnName.endsWith( "desc" ) )

                 {

                     descending = true;

                     lowerColumnName = lowerColumnName.substring( 0, lowerColumnName.length() - 4 ).trim();

                 }

                 else if ( lowerColumnName.endsWith( "asc" ) )

                 {

                     descending = false;

                     lowerColumnName = lowerColumnName.substring( 0, lowerColumnName.length() - 3 ).trim();

                 }

                 if ( "key".equals( lowerColumnName ) )

                 {

                     fieldName = "issuekey";

                 }

                 else if ( "summary".equals( lowerColumnName ) )

                 {

                     fieldName = lowerColumnName;

                 }

                 else if ( "status".equals( lowerColumnName ) )

                 {

                     fieldName = lowerColumnName;

                 }

                 else if ( "resolution".equals( lowerColumnName ) )

                 {

                     fieldName = lowerColumnName;

                 }

                 else if ( "assignee".equals( lowerColumnName ) )

                 {

                     fieldName = lowerColumnName;

                 }

                 else if ( "reporter".equals( lowerColumnName ) )

                 {

                     fieldName = lowerColumnName;

                 }

                 else if ( "type".equals( lowerColumnName ) )

                 {

                     fieldName = "issuetype";

                 }

                 else if ( "priority".equals( lowerColumnName ) )

                 {

                     fieldName = lowerColumnName;

                 }

                 else if ( "version".equals( lowerColumnName ) )

                 {

                     fieldName = "versions";

                 }

                 else if ( "fix version".equals( lowerColumnName ) )

                 {

                     fieldName = "fixVersions";

                 }

                 else if ( "component".equals( lowerColumnName ) )

                 {

                     fieldName = "components";

                 }

                 else if ( "created".equals( lowerColumnName ) )

                 {

                     fieldName = lowerColumnName;

                 }

                 else if ( "updated".equals( lowerColumnName ) )

                 {

                     fieldName = lowerColumnName;

                 }

                 if ( fieldName != null )

                 {

                     localFilter.append( "&sorter/field=" );

                     localFilter.append( fieldName );

                     localFilter.append( "&sorter/order=" );

                     localFilter.append( descending ? "DESC" : "ASC" );

                     validSortColumnNames++;

                 }

                 else

                 {

                     // Error in the configuration

                     getLog().error(

                         "maven-changes-plugin: The configured value '" + lowerColumnName

                             + "' for sortColumnNames is not correct." );

                 }

             }

         }

         if ( validSortColumnNames == 0 )

         {

             // Error in the configuration

             getLog().error(

                 "maven-changes-plugin: None of the configured sortColumnNames '" + sortColumnNames + "' are correct." );

         }

         return localFilter.toString();

     }

     /**

      * Execute the query on the JIRA server.

      *

      * @throws Exception on error

      */

     public void doExecute()

         throws Exception

     {

         try

         {

             HttpClient client = new HttpClient();

             // MCHANGES-89 Allow circular redirects

             HttpClientParams clientParams = client.getParams();

             clientParams.setBooleanParameter( HttpClientParams.ALLOW_CIRCULAR_REDIRECTS, true );

             HttpState state = new HttpState();

             HostConfiguration hc = new HostConfiguration();

             client.setHostConfiguration( hc );

             client.setState( state );

             determineProxy( client );

             Map urlMap = getJiraUrlAndIssueId();

             String jiraUrl = (String) urlMap.get( "url" );

             String jiraId = (String) urlMap.get( "id" );

             prepareBasicAuthentication( client );

             boolean jiraAuthenticationSuccessful = false;

             if ( isJiraAuthenticationConfigured() )

             {

                 jiraAuthenticationSuccessful = doJiraAuthentication( client, jiraUrl );

             }

             if ( ( isJiraAuthenticationConfigured() && jiraAuthenticationSuccessful )

                 || !isJiraAuthenticationConfigured() )

             {

                 if ( jiraId == null || jiraId.length() == 0 )

                 {

                     log.debug( "The JIRA URL " + project.getIssueManagement().getUrl()

                         + " doesn't include a pid, trying to extract it from JIRA." );

                     jiraId = JiraHelper.getPidFromJira( log, project.getIssueManagement().getUrl(), client );

                 }

                 if ( jiraId == null )

                 {

                     getLog().error( "The issue management URL in the POM does not include a pid,"

                         + " and it was not possible to extract it from the page at that URL." );

                 }

                 else

                 {

                     // create the URL for getting the proper issues from JIRA

                     String fullURL = jiraUrl + "/secure/IssueNavigator.jspa?view=rss&pid=" + jiraId;

                     if ( getFixFor() != null )

                     {

                         fullURL += "&fixfor=" + getFixFor();

                     }

                     String createdFilter = createFilter();

                     if ( createdFilter.charAt( 0 ) != '&' )

                     {

                         fullURL += "&";

                     }

                     fullURL += createdFilter;

                     fullURL += ( "&tempMax=" + nbEntriesMax + "&reset=true&decorator=none" );

                     if (log.isDebugEnabled())

                     {

                         log.debug( "download jira issues from url " + fullURL );

                     }

                     // execute the GET

                     download( client, fullURL );

                 }

             }

         }

         catch ( Exception e )

         {

             getLog().error( "Error accessing " + project.getIssueManagement().getUrl(), e );

         }

     }

     /**

      * Override this method if you need to get issues for a specific Fix For.

      *

      * @return A Fix For id or <code>null</code> if you don't have that need

      */

     protected String getFixFor()

     {

         return null;

     }

     /**

      * Parse out the base URL for JIRA and the JIRA project id from the issue

      * management section of the POM.

      *

      * @return A <code>Map</code> containing the URL and project id

      */

     private Map getJiraUrlAndIssueId()

     {

         HashMap urlMap = new HashMap();

         String url = project.getIssueManagement().getUrl();

         // chop off the parameter part

         int pos = url.indexOf( "?" );

         // and get the id while we're at it

         String id = "";

         if ( pos >= 0 )

         {

             // project id

             id = url.substring( url.lastIndexOf( "=" ) + 1 );

         }

         String jiraUrl = url.substring( 0, url.lastIndexOf( "/" ) );

         if ( jiraUrl.endsWith( "secure" ) || jiraUrl.endsWith( "browse" ) )

         {

             jiraUrl = jiraUrl.substring( 0, jiraUrl.lastIndexOf( "/" ) );

         }

         getLog().debug( "JIRA lives at: " + jiraUrl );

         urlMap.put( "url", jiraUrl );

         urlMap.put( "id", id );

         return urlMap;

     }

     /**

      * Check and prepare for basic authentication.

      *

      * @param client The client to prepare

      */

     private void prepareBasicAuthentication( HttpClient client )

     {

         if ( ( webUser != null ) && ( webUser.length() > 0 ) )

         {

             client.getParams().setAuthenticationPreemptive( true );

             Credentials defaultcreds = new UsernamePasswordCredentials( webUser, webPassword );

             getLog().debug( "Using username: " + webUser + " for Basic Authentication." );

             client.getState().setCredentials( new AuthScope( null, AuthScope.ANY_PORT, null, AuthScope.ANY_SCHEME ),

                                               defaultcreds );

         }

     }

     /**

      * Authenticate against JIRA. This method relies on jiraUser and

      * jiraPassword being set. You can check this by calling

      * isJiraAuthenticationConfigured().

      *

      * @param client    the HttpClient

      * @param jiraUrl   the JIRA installation

      * @return <code>true</code> if the authentication was successful, otherwise <code>false</code>

      */

     private boolean doJiraAuthentication( HttpClient client, final String jiraUrl )

     {

         // log into JIRA if we have to

         String loginUrl = null;

         StringBuffer loginLink = new StringBuffer( jiraUrl );

         loginLink.append( "/login.jsp?os_destination=/secure/" );

         loginLink.append( "&os_username=" ).append( jiraUser );

         String password = null;

         if ( jiraPassword != null )

         {

             password = StringUtils.repeat( "*", jiraPassword.length() );

         }

         getLog().debug( "Login URL: " + loginLink + "&os_password=" + password );

         loginLink.append( "&os_password=" ).append( jiraPassword );

         loginUrl = loginLink.toString();

         // execute the login

         GetMethod loginGet = new GetMethod( loginUrl );

         try

         {

             client.executeMethod( loginGet );

             if ( loginSucceeded( loginGet ) )

             {

                 getLog().debug( "Successfully logged in into JIRA." );

                 return true;

             }

             else

             {

                 getLog().warn( "Was unable to login into JIRA: wrong username and/or password." );

             }

         }

         catch ( Exception e )

         {

             if ( getLog().isDebugEnabled() )

             {

                 getLog().error( "Error trying to login into JIRA.", e );

             }

             else

             {

                 getLog().error( "Error trying to login into JIRA. Cause is: " + e.getLocalizedMessage() );

             }

         }

         return false;

     }

     /**

      * Check to see if we think that JIRA authentication is needed.

      *

      * @return <code>true</code> if jiraUser and jiraPassword are set, otherwise <code>false</code>

      */

     private boolean isJiraAuthenticationConfigured()

     {

         return ( jiraUser != null ) && ( jiraUser.length() > 0 ) && ( jiraPassword != null );

     }

     /**

      * Evaluate if the login attempt to JIRA was successful or not. We can't

      * use the status code because JIRA returns 200 even if the login fails.

      *

      * @param loginGet The method that was executed

      * @return <code>false</code> if we find an error message in the response body, otherwise <code>true</code>

      * @todo There must be a nicer way to know whether we were able to login or not

      */

     private boolean loginSucceeded( GetMethod loginGet )

         throws IOException

     {

         final String loginFailureResponse = "your username and password are incorrect";

         return loginGet.getResponseBodyAsString().indexOf( loginFailureResponse ) == -1;

     }

     /**

      * Setup proxy access if we have to.

      *

      * @param client  the HttpClient

      */

     private void determineProxy( HttpClient client )

     {

         // see whether there is any proxy defined in maven

         Proxy proxy = null;

         String proxyHost = null;

         int proxyPort = 0;

         String proxyUser = null;

         String proxyPass = null;

         if ( project == null )

         {

             getLog().error( "No project set. No proxy info available." );

             return;

         }

         if ( settings != null )

         {

             proxy = settings.getActiveProxy();

         }

         if ( proxy != null )

         {

             proxyHost = settings.getActiveProxy().getHost();

             proxyPort = settings.getActiveProxy().getPort();

             proxyUser = settings.getActiveProxy().getUsername();

             proxyPass = settings.getActiveProxy().getPassword();

             getLog().debug( proxyPass );

         }

         if ( proxyHost != null )

         {

             client.getHostConfiguration().setProxy( proxyHost, proxyPort );

             getLog().debug( "Using proxy: " + proxyHost + " at port " + proxyPort );

             if ( proxyUser != null )

             {

                 getLog().debug( "Using proxy user: " + proxyUser );

                 client.getState().setProxyCredentials(

                                                        new AuthScope( null, AuthScope.ANY_PORT, null,

                                                                       AuthScope.ANY_SCHEME ),

                                                        new UsernamePasswordCredentials( proxyUser, proxyPass ) );

             }

         }

     }

     /**

      * Downloads the given link using the configured HttpClient, possibly following redirects.

      *

      * @param cl     the HttpClient

      * @param link   the URL to JIRA

      */

     private void download( final HttpClient cl, final String link )

     {

         try

         {

             GetMethod gm = new GetMethod( link );

             getLog().info( "Downloading from JIRA at: " + link );

             gm.setFollowRedirects( true );

             cl.executeMethod( gm );

             StatusLine sl = gm.getStatusLine();

             if ( sl == null )

             {

                 getLog().error( "Unknown error validating link: " + link );

                 return;

             }

             // if we get a redirect, do so

             if ( gm.getStatusCode() == HttpStatus.SC_MOVED_TEMPORARILY )

             {

                 Header locationHeader = gm.getResponseHeader( "Location" );

                 if ( locationHeader == null )

                 {

                     getLog().warn( "Site sent redirect, but did not set Location header" );

                 }

                 else

                 {

                     String newLink = locationHeader.getValue();

                     getLog().debug( "Following redirect to " + newLink );

                     download( cl, newLink );

                 }

             }

             if ( gm.getStatusCode() == HttpStatus.SC_OK )

             {

                 final String strGetResponseBody = gm.getResponseBodyAsString();

                 if ( !output.getParentFile().exists() )

                 {

                     output.getParentFile().mkdirs();

                 }

                 // write the reponse to file

                 PrintWriter pw = new PrintWriter( new FileWriter( output ) );

                 pw.print( strGetResponseBody );

                 pw.close();

                 getLog().debug( "Downloading from JIRA was successful" );

             }

             else

             {

                 getLog().warn( "Downloading from JIRA failed. Received: [" + gm.getStatusCode() + "]" );

             }

         }

         catch ( HttpException e )

         {

             if ( getLog().isDebugEnabled() )

             {

                 getLog().error( "Error downloading issues from JIRA:", e );

             }

             else

             {

                 getLog().error( "Error downloading issues from JIRA url: " + e.getLocalizedMessage() );

             }

         }

         catch ( IOException e )

         {

             if ( getLog().isDebugEnabled() )

             {

                 getLog().error( "Error downloading issues from JIRA:", e );

             }

             else

             {

                 getLog().error( "Error downloading issues from JIRA. Cause is " + e.getLocalizedMessage() );

             }

         }

     }

     /**

      * Set the output file for the log.

      *

      * @param thisOutput the output file

      */

     public void setOutput( File thisOutput )

     {

         this.output = thisOutput;

     }

     public File getOutput()

     {

         return this.output;

     }

     /**

      * Sets the project.

      *

      * @param thisProject  The project to set

      */

     public void setMavenProject( Object thisProject )

     {

         this.project = (MavenProject) thisProject;

     }

     /**

      * Sets the maximum number of Issues to show.

      *

      * @param nbEntries  The maximum number of Issues

      */

     public void setNbEntries( final int nbEntries )

     {

         nbEntriesMax = nbEntries;

     }

     /**

      * Sets the statusIds.

      *

      * @param thisStatusIds   The id(s) of the status to show, as comma separated string

      */

     public void setStatusIds( String thisStatusIds )

     {

         statusIds = thisStatusIds;

     }

     /**

      * Sets the priorityIds.

      *

      * @param thisPriorityIds  The id(s) of the priority to show, as comma separated string

      */

     public void setPriorityIds( String thisPriorityIds )

     {

         priorityIds = thisPriorityIds;

     }

     /**

      * Sets the resolutionIds.

      *

      * @param thisResolutionIds  The id(s) of the resolution to show, as comma separated string

      */

     public void setResolutionIds( String thisResolutionIds )

     {

         resolutionIds = thisResolutionIds;

     }

     /**

      * Sets the sort column names.

      *

      * @param thisSortColumnNames The column names to sort by

      */

     public void setSortColumnNames( String thisSortColumnNames )

     {

         sortColumnNames = thisSortColumnNames;

     }

     /**

      * Sets the password for authentication against the webserver.

      *

      * @param thisWebPassword  The password of the webserver

      */

     public void setWebPassword( String thisWebPassword )

     {

         this.webPassword = thisWebPassword;

     }

     /**

      * Sets the username for authentication against the webserver.

      *

      * @param thisWebUser   The username of the webserver

      */

     public void setWebUser( String thisWebUser )

     {

         this.webUser = thisWebUser;

     }

     /**

      * Sets the password to log into a secured JIRA.

      *

      * @param thisJiraPassword  The password for JIRA

      */

     public void setJiraPassword( final String thisJiraPassword )

     {

         this.jiraPassword = thisJiraPassword;

     }

     /**

      * Sets the username to log into a secured JIRA.

      *

      * @param thisJiraUser  The username for JIRA

      */

     public void setJiraUser( String thisJiraUser )

     {

         this.jiraUser = thisJiraUser;

     }

     /**

      * Sets the filter to apply to query to JIRA.

      *

      * @param thisFilter  The filter to query JIRA

      */

     public void setFilter( String thisFilter )

     {

         this.filter = thisFilter;

     }

     /**

      * Sets the component(s) to apply to query JIRA.

      *

      * @param theseComponents   The id(s) of components to show, as comma separated string

      */

     public void setComponent( String theseComponents )

     {

         this.component = theseComponents;

     }

     /**

      * Sets the fix version id(s) to apply to query JIRA.

      *

      * @param theseFixVersionIds The id(s) of fix versions to show, as comma separated string

      */

     public void setFixVersionIds( String theseFixVersionIds )

     {

         this.fixVersionIds = theseFixVersionIds;

     }

     /**

      * Sets the typeIds.

      *

      * @param theseTypeIds  The id(s) of the types to show, as comma separated string

      */

     public void setTypeIds( String theseTypeIds )

     {

         typeIds = theseTypeIds;

     }

     public void setLog( Log log )

     {

         this.log = log;

     }

     private Log getLog()

     {

         return log;

     }

     public void setSettings( Settings settings )

     {

         this.settings = settings;

     }

 }