/* ======================================================================
The Bodington System Software License, Version 1.0
  
Copyright (c) 2001 The University of Leeds.  All rights reserved.
  
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

1.  Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.

2.  Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

3.  The end-user documentation included with the redistribution, if any,
must include the following acknowledgement:  "This product includes
software developed by the University of Leeds
(http://www.bodington.org/)."  Alternately, this acknowledgement may
appear in the software itself, if and wherever such third-party
acknowledgements normally appear.

4.  The names "Bodington", "Nathan Bodington", "Bodington System",
"Bodington Open Source Project", and "The University of Leeds" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
d.gardner@leeds.ac.uk.

5.  The name "Bodington" may not appear in the name of products derived
from this software without prior written permission of the University of
Leeds.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO,  TITLE,  THE IMPLIED WARRANTIES 
OF QUALITY  AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO 
EVENT SHALL THE UNIVERSITY OF LEEDS OR ITS CONTRIBUTORS BE LIABLE FOR 
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
POSSIBILITY OF SUCH DAMAGE.
=========================================================

This software was originally created by the University of Leeds and may contain voluntary 
contributions from others.  For more information on the Bodington Open Source Project, please 
see http://bodington.org/

====================================================================== */

package org.bodington.servlet.facilities;

import org.apache.log4j.Logger;

import org.bodington.servlet.*;

import org.bodington.database.*;
import org.bodington.server.*;
import org.bodington.server.realm.*;

import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;

import org.bodington.server.resources.Resource;

public class AliasFacility extends org.bodington.servlet.facilities.Facility
	{
    
    private static Logger log = Logger.getLogger(AliasFacility.class);
	

	public boolean willAcceptFacility( Facility f )
		{
		return false;
		}

	
	public Resource newResource()
		{
		return new AliasEditor();
		}
	
	public boolean initResource( Request breq, Resource new_resource )
		throws Exception
		{
		if ( !(new_resource instanceof AliasEditor) )
			throw new Exception( "Technical problem: An incorrect type of resource was created." );
		return true;
		}

	

	public void insert( Request req, PrintWriter out, String command, String insertname )
		throws ServletException, IOException
		{
		AliasEditor editor;
		
		log.debug( " AliasFacility insert( " + command + ", " + insertname + " )");

			
		if ( command.equalsIgnoreCase( "zonename" ) )
		    {
		    if ( out==null ) return;
	    	try
	    		{
		        editor = (AliasEditor)req.getResource();
		      	if ( editor == null )
		            return;
		        Zone zone = editor.getEffectiveZone();
		        if ( zone!=null )
		        	out.print( zone.getName() );
		    	}
		    catch ( Exception ex )
		        {
		        out.print( ex.toString() );
		        return;
		        }
		    }
		    
		if ( command.equalsIgnoreCase( "aliases" ) )
		    {
		    if ( out==null ) return;
	    	try
	    		{
			    Alias alias;

		        editor = (AliasEditor)req.getResource();
		      	if ( editor == null )
		            return;
	        
	        	Enumeration enumeration = editor.findEditableAliases();
		        
	        	out.println( "<TABLE CLASS=bs-table-opaque><TR>" );
	        	out.println( "<TD CLASS=bs-cell-special><B>Edit</B></TD>" );
	        	out.println( "<TD CLASS=bs-cell-special><B>Name</B></TD>" );
	        	out.println( "<TD CLASS=bs-cell-special><B>Primary</B></TD>" );
	        	out.println( "<TD CLASS=bs-cell-special><B>User Category</B></TD>" );
	        	out.println( "<TD CLASS=bs-cell-special><B>Has Entries</B></TD>" );
	        	out.println( "<TD CLASS=bs-cell-special><B>Add Entries</B></TD>" );
	        	out.println( "<TD CLASS=bs-cell-special><B>Clear Entries</B></TD></TR>" );
		        
	        	Integer a;
	        	boolean primary;
	        	while ( enumeration.hasMoreElements() )
	        		{
	        		alias = (Alias)enumeration.nextElement();
	        		out.print( "<TD ALIGN=CENTER VALIGN=CENTER><FONT SIZE=-2>" );
	        		out.print( "<FORM METHOD=POST ACTION=bs_template_editalias.html>" );
	        		out.print( "<INPUT TYPE=HIDDEN NAME=alias_id VALUE=" );
                    out.print( alias.getAliasId().toString() );
                    out.print( "><INPUT TYPE=SUBMIT VALUE=Edit></FORM></FONT>" );
	        		
	        		out.println( "</TD><TD>" );
                    out.print( alias.getAliasName() );
	        		out.println( "</TD><TD>" );
	        		
	        		a = alias.getAliasType(); 
	        		primary = ( a!=null && a.intValue() == Alias.TYPE_PRIMARY );
	        		if ( primary )
	        			{
	        			out.print( "yes" );
	        			out.print( "</TD><TD>" );
	        			out.print( alias.getUserCategory() );
	        			}
	        		else
	        			out.print( "~</TD><TD>~" );
        			out.print( "</TD><TD>" );
	        		if ( alias.hasEntries() )
	        			out.println( "Yes" );
	        		else
	        			out.println( "No" );

	        		out.print( "</TD><TD><FONT SIZE=-2>" );
	        		out.print( "<FORM METHOD=POST ACTION=bs_template_createaliasentries.html>" );
	        		out.print( "<INPUT TYPE=HIDDEN NAME=alias_id VALUE=" );
                    out.print( alias.getAliasId().toString() );
                    out.print( "><INPUT TYPE=SUBMIT VALUE=Add></FORM>" );
	        		out.print( "</FONT></TD><TD><FONT SIZE=-2>" );
	        		out.print( "<FORM METHOD=POST ACTION=bs_template_clearaliasentries.html>" );
	        		out.print( "<INPUT TYPE=HIDDEN NAME=alias_id VALUE=" );
                    out.print( alias.getAliasId().toString() );
                    out.print( "><INPUT TYPE=SUBMIT VALUE=Clear></FORM>" );
        			out.print( "</FONT></TD></TR>" );
	        		}
		        
	        	out.println( "<TR><TD COLSPAN=7><A HREF=bs_template_createalias.html><I>Create new type of unique identifier.</I></A></TD></TR></TABLE>" );
		        }
		    catch ( Exception ex )
		        {
		        out.print( ex.toString() );
		        return;
		        }
	        
		    return;
		    }

		if ( command.equalsIgnoreCase( "aliasnamecontrol" ) )
		    {
		    if ( out==null ) return;
		    return;
		    }

		if ( command.equalsIgnoreCase( "aliasfield" ) || 
			 command.equalsIgnoreCase( "aliasname" )      )
		    {
		    if ( out==null ) return;
		    try
		    	{
		        editor = (AliasEditor)req.getResource();
		      	if ( editor == null )
		            return;
		    	Alias alias=null;
				String aid=(String)req.getParameter( "alias_id" );
				if ( aid!=null && aid.length()>0 )
					{
					PrimaryKey k;
					k = new PrimaryKey( Integer.parseInt( aid ) );
					alias = Alias.findAlias( k );
					if ( alias==null )
						{
						out.println( "<P>Selected alias wasn't found.</P>" );
						return;
						}
					if ( !alias.getZoneId().equals( editor.getEffectiveZoneId() ) )
						{
						out.println( "<P>Selected alias doesn't belong in this administrative zone.</P>" );
						return;
						}
					}
				if ( command.equalsIgnoreCase( "aliasname" ) )
					out.print( alias.getAliasName() );
				else
		    		aliasField( req, out, insertname, alias );
		        }
		    catch ( Exception ex )
		        {
		        out.print( ex.toString() );
		        return;
		        }
		        
		    return;
		    }

		if ( command.equalsIgnoreCase( "aliasoperation" ) )
		    {
		    if ( out==null ) return;
		    String aliasop = req.getParameter( "aliasop" );
		    if ( aliasop==null || aliasop.length()<1 )
		    	return;
		    if ( aliasop.equalsIgnoreCase( "noop" ) )
		    	return;
		    	
		    try 
		        {
		        editor = (AliasEditor)req.getResource();
		        if ( editor == null )
		            return;

    		        
	            Alias alias=null;
	            PrimaryKey alias_id=null;
	           	String str = req.getParameter( "alias_id" );
	          	if ( str!=null && str.length()>0 )
		       		{
			       	alias_id = new PrimaryKey( Integer.parseInt( str ) );
			       	if ( alias_id!=null )
	            		alias = Alias.findAlias( alias_id );
	            	if ( alias==null )
	            		{
		            	out.println( "ERROR The specified unique identifier couldn't be found.</FONT></P>" );
		            	return;
	            		}
	            	if ( !alias.getZone().equals( editor.getEffectiveZone() ) )
	            		{
		            	out.println( "ERROR The specified unique identifier doesn't belong in this administrative zone.</FONT></P>" );
		            	return;
	            		}
	            	}
    		    
		        if ( aliasop.equalsIgnoreCase( "deletealias" ) )
		        	{
					out.print( "<P><FONT COLOR=RED>Confirmation: " );
		            if ( alias==null )
	            		{
		            	out.println( "ERROR No unique identifier was selected for deletion.</FONT></P>" );
		            	return;
	            		}
	            	if ( alias.hasEntries() )
	            		{
		            	out.println( "ERROR The unique identifier cannot be deleted because it has entries..</FONT></P>" );
		            	return;
	            		}
	            	alias.delete();
	            	out.println( " Alias deleted.</FONT></P>" );
	            	return;
		        	}
		        	
		        if ( aliasop.equalsIgnoreCase( "clearaliasentries" ) )
		        	{
					out.print( "<P><FONT COLOR=RED>Confirmation: " );
		            if ( alias==null )
	            		{
		            	out.println( "ERROR No unique identifier was selected for deletion.</FONT></P>" );
		            	return;
	            		}
	            		
	            	String c = req.getParameter( "certain" );
	            	if ( c==null || !c.equalsIgnoreCase( "yes" ) )
	            		{
		            	out.println( "ERROR operation wasn't carried out because the confirmation checkbox wasn't selected.</FONT></P>" );
		            	return;
	            		}
	            		
	            	if ( !alias.hasEntries() )
	            		{
		            	out.println( "There are no entries left to clear.</FONT></P>" );
		            	return;
	            		}
	            		
	            	AliasEntry entry;
	            	Enumeration enumeration = AliasEntry.findAliasEntries( "alias_id = " + alias.getAliasId() );
	            	while ( enumeration.hasMoreElements() )
	            		{
	            		entry = (AliasEntry) enumeration.nextElement();
	            		entry.delete();
	            		}
	            	out.println( " unique identifier entries deleted.</FONT></P>" );
		        	}
		        	
		        if ( aliasop.equalsIgnoreCase( "createalias" ) || 
		             aliasop.equalsIgnoreCase( "editalias" )        )
		            {
					out.print( "<P><FONT COLOR=RED>Confirmation: " );
					out.flush();
					
			        if ( aliasop.equalsIgnoreCase( "editalias" ) && alias==null )
		            	{
			            out.println( "ERROR No unique identifier was selected for editing.</FONT></P>" );
			            return;
		            	}
		            
		            String name = req.getParameter( "alias_name" );
		            if ( name==null )
		            	{
		            	out.println( "ERROR The unique identifier name was not specified.</FONT></P>" );
		            	return;
		            	}
		            name = name.toLowerCase().trim();

		            String type = req.getParameter( "alias_type" );
		            boolean is_primary = ( type!=null && type.equalsIgnoreCase( "primary" ) );
					if ( is_primary )
		            	{
		            	String[] user_cats = req.getParameterValues( "category" );
		            	String user_cat="";
		            	if ( user_cats==null || user_cats.length==0 )
		            		{
		            		out.println( "ERROR For primary unique identifiers one or more user categories must be specified.</FONT></P>" );
		            		return;
		            		}
		            	for ( int i=0; i< user_cats.length; i++ )
		            		{
		            		if ( i>0 )
		            			user_cat+=",";
		            		user_cat += user_cats[i];
		            		}
			            	
				        if ( aliasop.equalsIgnoreCase( "editalias" ) )
				        	{
				            editor.editAlias( alias_id, name, true, user_cat );
				            out.println( "Edits saved.</FONT></P>" );
				            }
				        else
				        	{
			            	editor.createAlias( name, true, user_cat );
				            out.println( "New alias created.</FONT></P>" );
			            	}
			            return;
		            	}
		            	

			        if ( aliasop.equalsIgnoreCase( "editalias" ) )
			        	{
			            editor.editAlias( alias_id, name, false, null );
			            out.println( "Edits saved.</FONT></P>" );
			            }
			        else
			        	{
			            editor.createAlias( name, false, null );
			            out.println( "New alias created.</FONT></P>" );
			            }
			        return;
		            }

		        if ( aliasop.equalsIgnoreCase( "createaliasentries" ) )
		            {
					out.print( "<P><FONT COLOR=RED>Confirmation: " );
		            String name = alias.getAliasName();
		            String entries = req.getParameter( "alias_entries" );
		            editor.createAliasEntries( name, new BufferedReader( new StringReader( entries ) ) );
		            out.println( "Identifiers were successfully created.</FONT></P>" );
		            }
		        }
		    catch ( Exception ex )
		        {
		        out.println( "</FONT></P>" );
			logException( out, "AliasFacility", "insert", 
			    "A technical problem occured.",
			    ex );
		        return;
		        }
		    return;
		    }


		if ( command.equalsIgnoreCase( "ifaliashasentries" ) )
		    {
		    try
		    	{
		        editor = (AliasEditor)req.getResource();
		      	if ( editor == null )
		      		{
					req.setSwitchedOff(  true );
		            return;
		            }
		    	Alias alias=null;
				String aid=(String)req.getParameter( "alias_id" );
				if ( aid==null || aid.length()==0 )
					{
					req.setSwitchedOff(  true );
					return;
					}

				PrimaryKey k;
				k = new PrimaryKey( Integer.parseInt( aid ) );
				alias = Alias.findAlias( k );
				if ( alias==null )
					{
					req.setSwitchedOff(  true );
					return;
					}

				if ( !alias.getZoneId().equals( editor.getEffectiveZoneId() ) )
					{
					req.setSwitchedOff(  true );
					return;
					}

				req.setSwitchedOff(  !alias.hasEntries() );
		        }
		    catch ( Exception ex )
		        {
				req.setSwitchedOff(  true );
		        return;
		        }
		        
		    return;
		    }
		
		if ( command.equalsIgnoreCase( "aliascontrol" ) )
		   {
			try
				{
				BuildingSession session;
				UserManagementSession um_session;

		   	session = BuildingSessionManagerImpl.getSession( req.getResource() );
		   	if ( !(session instanceof UserManagementSession) )
		    		{
		    		out.println( "<HR>Technical problem: unable to access appropriate tool session.<HR>" );
		    		return;
		    		}
		   	um_session = (UserManagementSession)session;

				aliasControl( um_session, req, out );
	    		return;
		   	}
			catch ( BuildingServerException bsex )
				{
				out.println( bsex.toString() );
				return;
				}
		   }

			
		super.insert( req, out, command, insertname );
		}
	
	public void aliasField( Request req, 
							PrintWriter out, 
							String insertname, 
							Alias alias )
		throws IOException, BuildingServerException
		{
		StringBuffer where = new StringBuffer();
		
		
		   
		if ( insertname.equalsIgnoreCase( "alias_id" ) )
			{
			out.print( "<INPUT TYPE=HIDDEN NAME=alias_id VALUE=\"" );
			if ( alias!=null )
				out.print( alias.getAliasId().toString() );
			out.print( "\">" );
			}
			
		if ( insertname.equalsIgnoreCase( "alias_name" ) )
			{
			out.print( "<INPUT NAME=alias_name VALUE=\"" );
			if ( alias!=null )
				out.print( alias.getAliasName() );
			out.print( "\">" );
			}
			
		if ( insertname.equalsIgnoreCase( "alias_type" ) )
			{
			out.print( "<INPUT TYPE=RADIO NAME=alias_type VALUE=Primary" );
			if ( alias!=null && alias.isPrimary() )
				out.print( " CHECKED" );
			out.println( " ONCLICK=doPrimary()>Primary.<BR>" );
			out.print( "<INPUT TYPE=RADIO NAME=alias_type VALUE=Other" );
			if ( alias==null || !alias.isPrimary() )
				out.print( " CHECKED" );
			out.print( " ONCLICK=doSecondary()>Secondary." );
			}
			
		if ( !insertname.equalsIgnoreCase( "user_categories" ) )
			return;
			
		Enumeration enumeration = Group.findGroups( "name LIKE 'all%'" );
		Group group;
		String name;
		for ( int i=0; enumeration.hasMoreElements(); i++ )
		    {
		    group = (Group)enumeration.nextElement();
		    name = group.getName();
		    //skip any groups that are not at top level
		    if ( name.indexOf( '.' )>=0 )
		        continue;
		    if ( name.equals( "allusers" ) )
		        continue;
		    name = name.substring( 3, name.length() );
		    out.print( "<INPUT TYPE=CHECKBOX NAME=category VALUE=\"" );
		    out.print( name );
		    out.print( "\"" );
		    if ( alias!=null && alias.hasUserCategory( name ) )
		    	out.print( " CHECKED" );
		    out.print( " ONCLICK=doCategory()>" );
		    out.print( name );
		    out.println( "<BR>" );
		    }
		}
	
	public void aliasControl( UserManagementSession um_session, Request req, PrintWriter out )
		throws ServletException, BuildingServerException, IOException
		{
		int i, j, k;
		PrimaryKey alias_id;
		String alias_name;
		Vector aliases, categories;
		
		try 
		    {
			aliases = um_session.findPermittedAliasIds();
			if ( aliases==null || aliases.size()==0 )
				{
				out.println( "<P>PROBLEM: there are no primary unique identifier types defined in this administrative zone.</P>" );
				return;
				}

			out.println( "<SELECT NAME=alias_name size=7 onchange=\"setcategories()\">" );
			for ( j=0; j<aliases.size(); j++ )
				{
				alias_id = (PrimaryKey)aliases.elementAt( j );
				alias_name = um_session.nameOfPermittedAlias( alias_id );
				out.print( "<OPTION VALUE=" );
				out.print( alias_name );
				out.print( ">" );
				out.print( alias_name );
				out.println( "</OPTION>" );
				}
			out.println( "</SELECT>" );


			out.println( "<SCRIPT LANGUAGE=JavaScript>" );
			out.println( "var listOfLists = new Array(" + j + ")" );
			
			String cat;
			for ( i=0; i<aliases.size(); i++ )
				{
				alias_id = (PrimaryKey)aliases.elementAt( i );
				alias_name = um_session.nameOfPermittedAlias( alias_id );
				out.print( "listOfLists[" + i + "]= new Array( " );
				categories = um_session.categoriesOfPermittedAlias( alias_id );
				for ( k=0; k<categories.size(); k++ )
					{
					cat = (String)categories.elementAt( k );
					if ( k>0 )
						out.print( ", " );
					out.print( "\"" );
					out.print( cat );
					out.print( "\"" );
					}
				out.println( " )" );
				}
			out.println( "</SCRIPT>" );
			}
		catch ( Exception ex )
		    {
		    out.print( ex.toString() );
		    return;
		    }
		}
			
		
	}