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+/*
+    This file is part of libkabc.
+    Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+    Boston, MA 02111-1307, USA.
+*/
+
+#ifndef KABC_DISTRIBUTIONLIST_H
+#define KABC_DISTRIBUTIONLIST_H
+
+#include <kdirwatch.h>
+
+#include "addressbook.h"
+
+namespace KABC {
+
+class DistributionListManager;
+
+/**
+  @short Distribution list of email addresses
+ 
+  This class represents a list of email addresses. Each email address is
+  associated with an address book entry. If the address book entry changes, the
+  entry in the distribution list is automatically updated.
+*/
+class DistributionList
+{
+  public:
+    /**
+      @short Distribution List Entry
+
+      This class represents an entry of a distribution list. It consists of an
+      addressee and an email address. If the email address is null, the
+      preferred email address of the addressee is used.
+    */
+    struct Entry
+    {
+      typedef QValueList<Entry> List;
+
+      Entry() {}
+      Entry( const Addressee &_addressee, const QString &_email ) :
+          addressee( _addressee ), email( _email ) {}
+
+      Addressee addressee;
+      QString email;
+    };
+
+    /**
+       Create distribution list object.
+
+      @param manager Managing object of this list.
+      @param name    Name of this list.
+    */
+    DistributionList( DistributionListManager *manager, const QString &name );
+
+    /**
+      Destructor.
+    */
+    ~DistributionList();
+
+    /**
+      Set name of this list. The name is used as key by the
+      DistributinListManager.
+    */
+    void setName( const QString & );
+
+    /**
+      Get name of this list.
+    */
+    QString name() const;
+
+    /**
+      Insert an entry into this distribution list. If the entry already exists
+      nothing happens.
+    */
+    void insertEntry( const Addressee &, const QString &email=QString::null );
+
+    /**
+      Remove an entry from this distribution list. If the entry doesn't exist
+      nothing happens.
+    */
+    void removeEntry( const Addressee &, const QString &email=QString::null );
+
+    /**
+      Return list of email addresses, which belong to this distributon list.
+      These addresses can be directly used by e.g. a mail client.
+    */
+    QStringList emails() const;
+
+    /**
+      Return list of entries belonging to this distribution list. This function
+      is mainly useful for a distribution list editor.
+    */
+    Entry::List entries() const;
+
+  private:
+    DistributionListManager *mManager;
+    QString mName;
+
+    Entry::List mEntries;
+};
+
+/**
+  @short Manager of distribution lists
+ 
+  This class represents a collection of distribution lists, which are associated
+  with a given address book.
+*/
+class DistributionListManager
+{
+  public:
+    /**
+      Create manager for given address book.
+    */
+    DistributionListManager( AddressBook * );
+
+    /**
+      Destructor.
+    */
+    ~DistributionListManager();
+
+    /**
+      Return distribution list with given name.
+    */
+    DistributionList *list( const QString &name );    
+
+    /**
+      Insert distribution list. If a list with this name already exists, nothing
+      happens.
+    */
+    void insert( DistributionList * );
+
+    /**
+      Remove distribution list. If a list with this name doesn't exist, nothing
+      happens.
+    */
+    void remove( DistributionList * );
+
+    /**
+      Return names of all distribution lists managed by this manager.
+    */
+    QStringList listNames();
+
+    /**
+      Load distribution lists form disk.
+    */
+    bool load();
+
+    /**
+      Save distribution lists to disk.
+    */
+    bool save();
+
+  private:
+    AddressBook *mAddressBook;
+
+    QPtrList<DistributionList> mLists;
+};
+
+/**
+  @short Watchdog for distribution lists
+ 
+  This class provides a @ref changed() signal that i emitted when the
+  distribution lists has changed in some way.
+
+  Exapmle:
+  
+  <pre>
+  KABC::DistributionListWatcher *watchdog = KABC::DistributionListWatcher::self()
+
+  connect( watchdog, SIGNAL( changed() ), SLOT( doSomething() ) );
+  </pre>
+*/
+
+class DistributionListWatcher : public QObject
+{
+  Q_OBJECT
+  
+  public:
+    /**
+     * Returns the watcher object.
+     */
+    static DistributionListWatcher *self();
+    
+
+  signals:
+    /**
+     * This signal is emmitted whenever the distribution lists has
+     * changed (if a list was added or removed, when a list was
+     * renamed or the entries of the list changed).
+     */
+    void changed();
+
+  protected:
+    DistributionListWatcher();
+    ~DistributionListWatcher();
+
+  private:
+    static DistributionListWatcher* mSelf;
+#ifndef KAB_EMBEDDED
+    KDirWatch *mDirWatch;
+#endif //KAB_EMBEDDED
+};
+
+}
+#endif