implemented SIG membership control, Delete SIG, and the "shell" for the

System Administration menu; also added "Post & Go Topics" as an option for the
post box in conferencing

src/com/silverwrist/venice/core/AdminOperations.java

@@ -7,7 +7,7 @@
  * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
  * language governing rights and limitations under the License.
  * 
- * The Original Code is the Venice Web Community System.
+ * The Original Code is the Venice Web Communities System.
  * 
  * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
  * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
@@ -20,4 +20,5 @@ package com.silverwrist.venice.core;
 public interface AdminOperations
 {
   // TODO: fill this in
+
 } // end interface AdminOperations

src/com/silverwrist/venice/core/SIGContext.java

@@ -153,4 +153,13 @@ public interface SIGContext extends SearchMode
 
   public abstract boolean canManageConferences();
 
+  public abstract int getMemberLevel(int uid) throws DataException, AccessError;
+
+  public abstract void setMembership(int uid, int new_level)
+      throws DataException, AccessError;
+
+  public abstract boolean canDelete();
+
+  public abstract void delete() throws DataException, AccessError;
+
 } // end interface SIGContext

src/com/silverwrist/venice/core/UserContext.java

@@ -89,4 +89,8 @@ public interface UserContext extends SearchMode
 
   public abstract List getConferenceHotlist() throws DataException;
 
+  public abstract boolean hasAdminAccess();
+
+  public abstract AdminOperations getAdminInterface() throws AccessError;
+
 } // end interface UserContext

src/com/silverwrist/venice/core/impl/AdminOperationsImpl.java

@@ -0,0 +1,61 @@
+/*
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (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.mozilla.org/MPL/>.
+ * 
+ * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
+ * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
+ * language governing rights and limitations under the License.
+ * 
+ * The Original Code is the Venice Web Communities System.
+ * 
+ * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+ * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+ * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.venice.core.impl;
+
+import java.sql.*;
+import org.apache.log4j.*;
+import com.silverwrist.venice.core.*;
+import com.silverwrist.venice.db.*;
+
+class AdminOperationsImpl implements AdminOperations
+{
+  /*--------------------------------------------------------------------------------
+   * Static data members
+   *--------------------------------------------------------------------------------
+   */
+
+  private static Category logger = Category.getInstance(AdminOperationsImpl.class.getName());
+
+  /*--------------------------------------------------------------------------------
+   * Attributes
+   *--------------------------------------------------------------------------------
+   */
+
+  private EngineBackend engine;            // the back end of the engine
+  private UserBackend user;                // the UserContext that created this object
+  private DataPool datapool;               // the data pool used by this object
+
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  AdminOperationsImpl(EngineBackend engine, UserBackend user, DataPool datapool)
+  {
+    this.engine = engine;
+    this.user = user;
+    this.datapool = datapool;
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Implementations from interface AdminOperations
+   *--------------------------------------------------------------------------------
+   */
+
+} // end class AdminOperationsImpl

src/com/silverwrist/venice/core/impl/BackgroundSIGPurge.java

@@ -0,0 +1,178 @@
+/*
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (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.mozilla.org/MPL/>.
+ * 
+ * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
+ * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
+ * language governing rights and limitations under the License.
+ * 
+ * The Original Code is the Venice Web Communities System.
+ * 
+ * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+ * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+ * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.venice.core.impl;
+
+import java.sql.*;
+import java.util.*;
+import org.apache.log4j.*;
+import com.silverwrist.util.ParallelRunQueue;
+import com.silverwrist.venice.db.*;
+import com.silverwrist.venice.core.DataException;
+import com.silverwrist.venice.core.InternalStateError;
+
+class BackgroundSIGPurge implements Runnable
+{
+  /*--------------------------------------------------------------------------------
+   * Static data members
+   *--------------------------------------------------------------------------------
+   */
+
+  private static Category logger = Category.getInstance(BackgroundSIGPurge.class.getName());
+
+  /*--------------------------------------------------------------------------------
+   * Attributes
+   *--------------------------------------------------------------------------------
+   */
+
+  private DataPool datapool;
+  private UserBackend user;
+  private int sigid;
+  private int num_confs;
+  private int max_confid;
+  private Hashtable conf_objects;
+
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  BackgroundSIGPurge(DataPool datapool, UserBackend user, int sigid, int num_confs, int max_confid,
+		     Hashtable conf_objects)
+  {
+    this.datapool = datapool;
+    this.user = user;
+    this.sigid = sigid;
+    this.num_confs = num_confs;
+    this.max_confid = max_confid;
+    this.conf_objects = conf_objects;
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Implementations from interface Runnable
+   *--------------------------------------------------------------------------------
+   */
+
+  public void run()
+  {
+    if (logger.isDebugEnabled())
+      logger.debug("BackgroundSIGPurge running on SIG #" + sigid);
+
+    Connection conn = null;  // pooled database connection
+    ParallelRunQueue rq = new ParallelRunQueue(2);
+
+    try
+    { // get a database connection from the pool
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // run some "lower priority" deletes
+      stmt.executeUpdate("DELETE FROM contacts WHERE owner_sigid = " + sigid + ";");
+      stmt.executeUpdate("DELETE FROM sigftrs WHERE sigid = " + sigid + ";");
+      stmt.executeUpdate("DELETE FROM sigban WHERE sigid = " + sigid + ";");
+
+      // look up all conference IDs in this SIG
+      int[] conf_ids = new int[num_confs];
+      StringBuffer sql = new StringBuffer("SELECT confid FROM sigtoconf WHERE sigid = ");
+      sql.append(sigid).append(" AND confid <= ").append(max_confid).append(" ORDER BY confid;");
+      ResultSet rs = stmt.executeQuery(sql.toString());
+      int conferences = 0;
+      while (rs.next())
+	conf_ids[conferences++] = rs.getInt(1);
+
+      for (int i=0; i<conferences; i++)
+      { // look to see if there's a conference SIG object first
+	Integer key = new Integer(conf_ids[i]);
+	ConferenceSIGContext confobj = (ConferenceSIGContext)(conf_objects.get(key));
+	if (confobj!=null)
+	{ // OK, there's an object - do the delete internally and release the object
+	  conf_objects.remove(key);
+	  confobj.delete(user);
+	  confobj.rd_release();
+	  
+	} // end if
+	else
+	{ // we need to manually remove the conference ourselves
+	  boolean delete_core = true;
+
+	  // see if conference is linked to other SIGs - will determine whether we do the core purge
+	  // routine
+	  sql.setLength(0);
+	  sql.append("SELECT sigid FROM sigtoconf WHERE confid = ").append(key).append(" AND sigid <> ");
+	  sql.append(sigid).append(" LIMIT 1;");
+	  rs = stmt.executeQuery(sql.toString());
+	  if (rs.next())
+	    delete_core = false;
+
+	  // delete the sigtoconf record
+	  sql.setLength(0);
+	  sql.append("DELETE FROM sigtoconf WHERE sigid = ").append(sigid).append(" AND confid = ");
+	  sql.append(key).append(';');
+
+	  if (delete_core)
+	  { // OK, we officially need to delete the whole core now...purge from the two important
+	    // tables first
+	    stmt.executeUpdate("DELETE FROM confs WHERE confid = " + key + ";");
+	    stmt.executeUpdate("DELETE FROM confalias WHERE confid = " + key + ";");
+
+	    // determine the number of topics in this conference, and the maximum topic ID, and use
+	    // that information to queue up the conference deletion
+	    sql.setLength(0);
+	    sql.append("SELECT COUNT(*), MAX(topicid) FROM topics WHERE confid = ").append(key).append(';');
+	    rs = stmt.executeQuery(sql.toString());
+	    if (!(rs.next()))
+	      throw new InternalStateError("BackgroundSIGPurge.run screwup on conference SELECT");
+	    rq.queue(new BackgroundConferencePurge(datapool,key.intValue(),rs.getInt(1),rs.getInt(2)));
+
+	  } // end if (have to delete conference data)
+
+	} // end else (deleting conference data manually)
+
+      } // end for
+
+      if (logger.isDebugEnabled())
+	logger.debug("BackgroundSIGPurge basic delete complete for sig #" + sigid);
+
+    } // end try
+    catch (SQLException e)
+    { // on an error, just die
+      logger.error("BackgroundSIGPurge FATAL EXCEPTION purging #" + sigid + ": " + e.getMessage(),e);
+      return;
+
+    } // end catch
+    catch (DataException de)
+    { // on an error, just die
+      logger.error("BackgroundSIGPurge FATAL EXCEPTION purging #" + sigid + ": " + de.getMessage(),de);
+      return;
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    rq.run();  // now run the parallel queue to finish processing
+
+    if (logger.isDebugEnabled())
+      logger.debug("BackgroundSIGPurge COMPLETE for sig #" + sigid);
+
+  } // end run
+
+} // end class BackgroundSIGPurge

src/com/silverwrist/venice/core/impl/ConferenceCoreData.java

@@ -1154,7 +1154,7 @@ class ConferenceCoreData implements ConferenceData
 
   } // end canDeleteConference
 
-  public synchronized void delete(SIGBackend sig) throws DataException
+  public synchronized void delete(UserBackend user, int the_sigid) throws DataException
   {
     if (deleted)
       throw new DataException("This conference has been deleted.");
@@ -1208,7 +1208,7 @@ class ConferenceCoreData implements ConferenceData
       } // end finally
 
       // create an audit record indicating we were successful
-      ar = new AuditRecord(AuditRecord.DELETE_CONF,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
+      ar = new AuditRecord(AuditRecord.DELETE_CONF,user.realUID(),user.userRemoteAddress(),the_sigid,
 			   "confid=" + confid);
 
     } // end try

src/com/silverwrist/venice/core/impl/ConferenceData.java

@@ -100,6 +100,6 @@ public interface ConferenceData extends ReferencedData
 
   public abstract boolean canDeleteConference(int level);
 
-  public abstract void delete(SIGBackend sig) throws DataException;
+  public abstract void delete(UserBackend user, int the_sigid) throws DataException;
 
 } // end interface ConferenceData

src/com/silverwrist/venice/core/impl/ConferenceSIGContext.java

@@ -106,6 +106,6 @@ public interface ConferenceSIGContext extends ReferencedData
 
   public abstract boolean canDeleteConference(int level);
 
-  public abstract void delete(SIGBackend sig) throws DataException;
+  public abstract void delete(UserBackend user) throws DataException;
 
 } // end interface ConferenceSIGContext

src/com/silverwrist/venice/core/impl/ConferenceSIGContextImpl.java

@@ -769,7 +769,7 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
 
   } // end canDeleteConference
 
-  public void delete(SIGBackend sig) throws DataException
+  public void delete(UserBackend user) throws DataException
   {
     ConferenceData c = getConferenceData();
     Connection conn = null;
@@ -782,7 +782,7 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
 
       // see if we have to delete the core object as well
       StringBuffer sql = new StringBuffer("SELECT sigid FROM sigtoconf WHERE confid = ");
-      sql.append(confid).append(" AND sigid <> ").append(this.sig.realSIGID()).append(" LIMIT 1;");
+      sql.append(confid).append(" AND sigid <> ").append(sig.realSIGID()).append(" LIMIT 1;");
       ResultSet rs = stmt.executeQuery(sql.toString());
       if (rs.next())
 	delete_core = false;  // we don't delete the core yet
@@ -790,7 +790,7 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
       // remove the row that links this conference to this SIG
       sql.setLength(0);
       sql.append("DELETE FROM sigtoconf WHERE confid = ").append(confid).append(" AND sigid = ");
-      sql.append(this.sig.realSIGID()).append(';');
+      sql.append(sig.realSIGID()).append(';');
       stmt.executeUpdate(sql.toString());
 
       // record that we've been deleted
@@ -816,7 +816,7 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
 
     if (delete_core)
     { // the conference is not linked to any other SIGs - we need to delete the core as well
-      c.delete(sig);
+      c.delete(user,sig.realSIGID());
       engine.detachConferenceDataObject(confid);
 
     } // end if

src/com/silverwrist/venice/core/impl/SIGCoreData.java

@@ -69,6 +69,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
   private boolean public_sig;           // is this a public SIG?
   private BitSet features;              // set of available features
   private Hashtable conf_objects = new Hashtable();    // holder for ConferenceSIGContextImpl objects
+  private boolean deleted = false;      // has this SIG been deleted?
 
   /*--------------------------------------------------------------------------------
    * Constructor
@@ -340,8 +341,10 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   } // end getLastUpdateDate
 
-  public void testMembership(int level, boolean is_member) throws AccessError
+  public void testMembership(int level, boolean is_member) throws DataException, AccessError
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
     if (Capability.exemptFromMembershipRequirement(level))
       return;
     if (members_only && !is_member)
@@ -355,6 +358,8 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public boolean checkMembership(int level, boolean is_member)
   {
+    if (deleted)
+      return false;
     if (Capability.exemptFromMembershipRequirement(level))
       return true;
     return !members_only || is_member;
@@ -363,31 +368,39 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public boolean canReadSIGSubObjects(int level)
   {
+    if (deleted)
+      return false;
     return (level>=read_level);
 
   } // end canReadSIGSubObjects
 
   public boolean canModifySIGProfile(int level)
   {
+    if (deleted)
+      return false;
     return (level>=write_level);
 
   } // end canModifySIGProfile
 
   public boolean canCreateSIGSubObjects(int level)
   {
+    if (deleted)
+      return false;
     return (level>=create_level);
 
   } // end canCreateSIGSubObjects
 
   public boolean canDeleteSIG(int level)
   {
+    if (deleted)
+      return false;
     return (level>=delete_level);
 
   } // end canDeleteSIG
 
   public boolean canJoinSIG(int uid, int level)
   {
-    if (level<join_level)
+    if (deleted || (level<join_level))
       return false;  // rejected on a level basis
 
     Connection conn = null;  // database connection
@@ -423,6 +436,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void putContactInfo(UserBackend user, ContactInfo ci) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -488,6 +504,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void putFeatureSet(UserBackend user, BitSet set) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -583,6 +602,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setName(UserBackend user, String name) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -629,6 +651,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setAlias(UserBackend user, String alias) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -676,6 +701,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setCategoryID(UserBackend user, int catid) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -723,6 +751,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setSynopsis(String synopsis) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
       
     try
@@ -755,6 +786,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setLanguage(String language) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
       
     try
@@ -787,6 +821,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setRules(String rules) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
       
     try
@@ -819,6 +856,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void touch() throws DataException
   {
+    if (deleted)
+      return;  // no need to touch anything
+
     Connection conn = null;  // database connection
       
     try
@@ -862,6 +902,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
   public synchronized void setHideFlags(UserBackend user, boolean directory, boolean search)
       throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -917,6 +960,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setMembersOnly(UserBackend user, boolean flag) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -970,6 +1016,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setInitialFeatureIndex(short ndx) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
       
     try
@@ -1002,6 +1051,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public String getJoinKey() throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
       
     try
@@ -1038,6 +1090,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized void setJoinKey(UserBackend user, String key) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -1115,6 +1170,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
   public synchronized void setSecurityLevels(UserBackend user, int read, int write, int create, int delete,
 					     int join) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -1182,6 +1240,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
   public synchronized void setMembership(UserBackend user, int uid, int grant_level, boolean locked,
 					 boolean hidden) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // successful audit record
       
@@ -1274,6 +1335,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public int getMemberCount(boolean include_hidden) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;  // database connection
       
     try
@@ -1311,6 +1375,8 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public boolean isFeaturePresent(String symbol)
   {
+    if (deleted)
+      return false;
     int ndx = engine.getFeatureIndexBySymbol(symbol);
     if (ndx>=0)
       return features.get(ndx);
@@ -1321,6 +1387,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public synchronized ConferenceSIGContext getConferenceDataObject(int confid) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     if (logger.isDebugEnabled())
       logger.debug("getConferenceDataObject(" + confid + ")...");
 
@@ -1367,6 +1436,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
   public ConferenceSIGContext createConference(SIGBackend sig, String name, String alias, String description,
 					       boolean pvt, boolean hide_list) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     ReturnConfSeq rcs = ConferenceCoreData.createConference(engine,sig,datapool,name,alias,description,
 							    pvt,hide_list,host_uid);
     ConferenceData cdata = rcs.getConference();
@@ -1399,6 +1471,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
   public List searchForMembers(int field, int mode, String term, int offset, int count,
 			       boolean include_hidden) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     if (logger.isDebugEnabled())
       logger.debug("Member search: SIG = " + sigid + ", field = " + field + ", mode = " + mode + ", term '"
 		   + term + "', offset = " + offset + ", count = " + count);
@@ -1501,6 +1576,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
   public int getSearchMemberCount(int field, int mode, String term, boolean include_hidden)
       throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     if (logger.isDebugEnabled())
       logger.debug("User search: SIG = " + sigid + ", field = " + field + ", mode = " + mode + ", term '"
 		   + term + "'");
@@ -1590,6 +1668,9 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   public List getMemberList(boolean include_hidden) throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     if (logger.isDebugEnabled())
       logger.debug("Member list: SIG = " + sigid);
 
@@ -1645,6 +1726,139 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   } // end getMemberList
 
+  public int getMemberLevel(int uid) throws DataException
+  {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
+    if (logger.isDebugEnabled())
+      logger.debug("Member level: SIG = " + sigid + ", user = " + uid);
+
+    Connection conn = null;      // pooled database connection
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // a relatively simple search
+      StringBuffer sql = new StringBuffer("SELECT granted_lvl FROM sigmember WHERE sigid = ");
+      sql.append(sigid).append(" AND uid = ").append(uid).append(';');
+      if (logger.isDebugEnabled())
+	logger.debug("SQL: " + sql.toString());
+      ResultSet rs = stmt.executeQuery(sql.toString());
+      if (rs.next())
+	return rs.getInt(1);
+      else
+	return -1;
+
+    } // end try
+    catch (SQLException e)
+    { // turn SQLException into data exception
+      logger.error("DB error reading member level: " + e.getMessage(),e);
+      throw new DataException("unable to retrieve member information: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+  } // end getMemberLevel
+
+  public void delete(UserBackend user) throws DataException
+  {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
+    if (logger.isDebugEnabled())
+      logger.debug("Delete SIG: SIG = " + sigid);
+
+    Connection conn = null;      // database connection
+    AuditRecord ar = null;       // audit record
+    int conf_count, conf_max;
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // lock the tables we need to reference immediately
+      stmt.executeUpdate("LOCK TABLES sigs WRITE, sigmember WRITE, sigtoconf READ;");
+      try
+      { // first delete the SIG record itself
+	stmt.executeUpdate("DELETE FROM sigs WHERE sigid = " + sigid + ";");
+
+	// now delete the members list
+	stmt.executeUpdate("DELETE FROM sigmember WHERE sigid = " + sigid + ";");
+
+	// determine the number of conferences in this SIG, and the maximum conference ID
+	ResultSet rs = stmt.executeQuery("SELECT COUNT(*), MAX(confid) FROM sigtoconf WHERE sigid = "
+					 + sigid + ";");
+	if (!(rs.next()))
+	  throw new InternalStateError("SIGCoreData.delete screwup on conference SELECT");
+	conf_count = rs.getInt(1);
+	conf_max = rs.getInt(2);
+
+	// record that we're now deleted
+	created = null;
+	last_access = null;
+	last_update = null;
+	contactid = -1;
+	name = null;
+	language = null;
+	synopsis = null;
+	rules = null;
+	alias = null;
+	deleted = true;
+
+      } // end try
+      finally
+      { // make sure to unlock the tables before we go
+	Statement ulk_stmt = conn.createStatement();
+	ulk_stmt.executeUpdate("UNLOCK TABLES;");
+
+      } // end finally
+
+      // create an audit record indicating what happened
+      ar = new AuditRecord(AuditRecord.DELETE_SIG,user.realUID(),user.userRemoteAddress(),sigid);
+    
+    } // end try
+    catch (SQLException e)
+    { // database error - this is a DataException
+      logger.error("DB error deleting SIG: " + e.getMessage(),e);
+      throw new DataException("unable to delete SIG: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure the connection is released before we go
+      try
+      { // save off the audit record before we go, though
+	if ((ar!=null) && (conn!=null))
+	  ar.store(conn);
+
+      } // end try
+      catch (SQLException e)
+      { // we couldn't store the audit record!
+	logger.error("DB error saving audit record: " + e.getMessage(),e);
+
+      } // end catch
+
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    // Delete the rest of the gunk in the background; use another thread to do it.
+    BackgroundSIGPurge purger = new BackgroundSIGPurge(datapool,user,sigid,conf_count,conf_max,conf_objects);
+    Thread thrd = new Thread(purger);
+    thrd.setPriority(Thread.NORM_PRIORITY-1);
+    thrd.start();
+
+  } // end delete
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface SIGDataBackend
    *--------------------------------------------------------------------------------

src/com/silverwrist/venice/core/impl/SIGData.java

@@ -52,7 +52,7 @@ public interface SIGData extends ReferencedData
 
   public abstract Date getLastUpdateDate();
 
-  public abstract void testMembership(int level, boolean is_member) throws AccessError;
+  public abstract void testMembership(int level, boolean is_member) throws DataException, AccessError;
 
   public abstract boolean checkMembership(int level, boolean is_member);
 
@@ -146,4 +146,8 @@ public interface SIGData extends ReferencedData
 
   public abstract List getMemberList(boolean include_hidden) throws DataException;
 
+  public abstract int getMemberLevel(int uid) throws DataException;
+
+  public abstract void delete(UserBackend user) throws DataException;
+
 } // end interface SIGData

src/com/silverwrist/venice/core/impl/SIGUserContextImpl.java

@@ -80,6 +80,7 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
   private boolean locked;             // is our membership locked?
   private SIGSimpleDataCache cache;   // cache object for name and alias
   private SIGData sigdata = null;     // the actual SIG data
+  private boolean deleted = false;    // has this SIG been deleted?
 
   /*--------------------------------------------------------------------------------
    * Constructors
@@ -174,6 +175,8 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
   {
     if (sigdata==null)
     { // attempt to load the SIGDataObject
+      if (deleted)
+	throw new DataException("This SIG has been deleted.");
       sigdata = engine.getSIGDataObject(sigid);
 
       // clear cache when we get the real sigdata
@@ -189,6 +192,8 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
   {
     if (sigdata==null)
     { // we need to load the SIGData...
+      if (deleted)
+	return null;  // we're deleted
       try
       { // attempt to load the SIGDataObject
 	sigdata = engine.getSIGDataObject(sigid);
@@ -212,6 +217,9 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   private void testConferenceAccess() throws DataException, AccessError
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     if (!(getSIGData().isFeaturePresent("CONF")))
     { // the SIG doesn't use conferencing
       logger.error("the SIG doesn't use conferencing");
@@ -340,6 +348,8 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   public CategoryDescriptor getCategory() throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
     return new CategoryDescriptorImpl(datapool,getSIGData().getCategoryID(),
 				      Capability.hideHiddenCategories(user.realBaseLevel()));
 
@@ -367,6 +377,9 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   public UserProfile getHostProfile() throws DataException
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     Connection conn = null;      // pooled database connection
 
     try
@@ -942,6 +955,9 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   public void join(String joinkey) throws DataException, AccessError
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     if (is_member)
     { // we're already a member!
       logger.info("attempting to join SIG, but already a member");
@@ -986,6 +1002,9 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   public void unjoin() throws DataException, AccessError
   {
+    if (deleted)
+      throw new DataException("This SIG has been deleted.");
+
     if (!is_member)
     { // we're already a member!
       logger.info("attempting to unjoin SIG, but not currently a member");
@@ -1016,13 +1035,13 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   public boolean canUnjoin()
   {
-    return is_member && !locked;
+    return !deleted && is_member && !locked;
 
   } // end canUnjoin
 
   public boolean canJoin()
   {
-    if (is_member)
+    if (is_member || deleted)
       return false;
     SIGData sd = getSIGDataNE();
     if (sd!=null)
@@ -1138,6 +1157,70 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   } // end canManageConferences
 
+  public int getMemberLevel(int uid) throws DataException, AccessError
+  {
+    getSIGData().testMembership(level,is_member);
+
+    return getSIGData().getMemberLevel(uid);
+
+  } // end getMemberLevel
+
+  public void setMembership(int uid, int new_level) throws DataException, AccessError
+  {
+    getSIGData().testMembership(level,is_member);
+    if (!(getSIGData().canModifySIGProfile(level)))
+    { // this user can't modify the SIG feature set
+      logger.error("user not permitted to modify the SIG's membership");
+      if (logger.isDebugEnabled())
+	logger.debug("(your level = " + level + ")");
+      throw new AccessError("You are not permitted to modify the SIG's membership.");
+
+    } // end if
+
+    // actually set the data in the database
+    getSIGData().setMembership(user,uid,new_level,false,false);
+
+    if (uid==user.realUID())  // and update our internal data store
+      setMemberValues(new_level,(new_level>0),false);
+
+  } // end setMembership
+
+  public boolean canDelete()
+  {
+    SIGData sd = getSIGDataNE();
+    if (sd==null)
+      return false;
+    if (!(sd.checkMembership(level,is_member)))
+      return false;
+    return sd.canDeleteSIG(level);
+
+  } // end canDelete
+
+  public void delete() throws DataException, AccessError
+  {
+    SIGData my_sig = getSIGData();
+    my_sig.testMembership(level,is_member);
+    if (!(my_sig.canDeleteSIG(level)))
+    { // no, repeat NO, way can we delete the SIG!
+      logger.error("user not permitted to delete SIG");
+      throw new AccessError("You are not permitted to delete this SIG.");
+
+    } // end if
+
+    // call the methods required to delete the SIG
+    my_sig.delete(user);
+    engine.detachSIGDataObject(sigid);
+
+    // flag that we've been deleted
+    cache = null;
+    deleted = true;
+
+    // detach our references from the lower-level object
+    sigdata = null;
+    my_sig.rd_release();
+
+  } // end delete
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface UserBackend
    *--------------------------------------------------------------------------------

src/com/silverwrist/venice/core/impl/UserContextImpl.java

@@ -868,6 +868,26 @@ class UserContextImpl implements UserContext, UserBackend
 
   } // end getConferenceHotlist
 
+  public boolean hasAdminAccess()
+  {
+    return Capability.canAdministerSystem(level);
+
+  } // end hasAdminAccess
+
+  public AdminOperations getAdminInterface() throws AccessError
+  {
+    if (!(Capability.canAdministerSystem(level)))
+    { // you don't have access to get this!
+      logger.error("user does not have access to do system admin stuff");
+      throw new AccessError("You are not permitted to administer the server.");
+
+    } // end if
+
+    // create the return object
+    return new AdminOperationsImpl(engine,this,datapool);
+
+  } // end getAdminInterface
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface UserBackend
    *--------------------------------------------------------------------------------

src/com/silverwrist/venice/core/impl/VeniceEngineImpl.java

@@ -1176,10 +1176,9 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
       while (rs.next())
       { // add all the found users to the list
-	UserFoundImpl ufi = new UserFoundImpl(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),
-					      rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8));
-	UserFound tmp = (UserFound)ufi;
-	rc.add(tmp);
+	UserFound uf = new UserFoundImpl(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),
+					 rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8));
+	rc.add(uf);
 
       } // end while