Initial CalDAV support

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1130194 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

21 files changed, 2559 insertions, 0 deletions

diff --git a/kresources/caldav/Makefile.am b/kresources/caldav/Makefile.am
new file mode 100644
index 00000000..45c0f2c7
--- /dev/null
+++ b/kresources/caldav/Makefile.am
@@ -0,0 +1,34 @@
+INCLUDES = -I$(top_srcdir) $(all_includes)
+
+lib_LTLIBRARIES = libkcal_caldav.la
+
+libkcal_caldav_la_SOURCES = resource.cpp \
+                               config.cpp \
+                               configwidgets.cpp \
+                               preferences.cpp \
+                               job.cpp \
+                               reader.cpp \
+                               writer.cpp \
+                               prefsskel.kcfgc
+libkcal_caldav_la_LDFLAGS = $(KDE_RPATH) $(all_libraries) \
+                               -version-info 1:0:0 -no-undefined
+libkcal_caldav_la_LIBADD = \
+                              $(top_builddir)/libkcal/libkcal.la \
+                              $(top_builddir)/libkdepim/libkdepim.la \
+                              -lcaldav
+libkcal_caldav_la_COMPILE_FIRST = prefsskel.h
+
+kde_module_LTLIBRARIES = kcal_caldav.la
+
+kcal_caldav_la_SOURCES = plugin.cpp
+kcal_caldav_la_LDFLAGS = $(all_libraries) -module $(KDE_PLUGIN)
+kcal_caldav_la_LIBADD = libkcal_caldav.la
+kcal_caldav_la_COMPILE_FIRST = prefsskel.h
+
+kcal_servicedir = $(kde_servicesdir)/kresources/kcal
+kcal_service_DATA = kcal_caldav.desktop
+
+METASOURCES = AUTO
+
+messages: rc.cpp
+	$(XGETTEXT) *.cpp -o $(podir)/kres_caldav.pot
diff --git a/kresources/caldav/config.cpp b/kresources/caldav/config.cpp
new file mode 100644
index 00000000..681faa1c
--- /dev/null
+++ b/kresources/caldav/config.cpp
@@ -0,0 +1,162 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Configuration and properties dialog
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#include "resource.h"
+#include "config.h"
+#include "configwidgets.h"
+
+#include <kcombobox.h>
+#include <kdebug.h>
+#include <kdialog.h>
+#include <klocale.h>
+#include <klineedit.h>
+#include <klistview.h>
+#include <kurlrequester.h>
+
+#include <qlabel.h>
+#include <qlayout.h>
+#include <qcheckbox.h>
+
+/*=========================================================================
+| NAMESPACE
+ ========================================================================*/
+
+using namespace KCal;
+
+/*=========================================================================
+| CONSTANTS
+ ========================================================================*/
+
+/*=========================================================================
+| STATIC METHODS
+ ========================================================================*/
+
+ResourceCalDav* ResourceCalDavConfig::getCalDavResource(KRES::Resource* resource) {
+    ResourceCalDav *res = dynamic_cast<ResourceCalDav *>( resource );
+    if (!res) {
+        kdDebug() << "invalid resource type";
+    }
+
+    return res;
+}
+
+CalDavPrefs* ResourceCalDavConfig::getPrefs(ResourceCalDav* res) {
+    CalDavPrefs* p = NULL;
+
+    if (res) {
+        p = res->prefs();
+        if (!p) {
+            kdDebug() << "CalDAV: res->prefs() returned NULL";
+        }
+    }
+
+    return p;
+}
+
+/*=========================================================================
+| CONSTRUCTOR / DESTRUCTOR
+ ========================================================================*/
+
+ResourceCalDavConfig::ResourceCalDavConfig( QWidget *parent )
+    : KRES::ConfigWidget( parent )
+{
+    setupUI();
+}
+
+/*=========================================================================
+| METHODS
+ ========================================================================*/
+
+void ResourceCalDavConfig::loadSettings( KRES::Resource *resource ) {
+    ResourceCalDav* res = getCalDavResource(resource);
+    CalDavPrefs* p = getPrefs(res);
+    if (NULL != p) {
+        mUrl->setText(p->url());
+        mUsername->setText(p->username());
+        mRememberPassword->setChecked(p->rememberPassword());
+        mPassword->setText(p->password());
+
+        mReloadConfig->loadSettings(res);
+        mSaveConfig->loadSettings(res);
+    }
+}
+
+void ResourceCalDavConfig::saveSettings( KRES::Resource *resource ) {
+    ResourceCalDav* res = getCalDavResource(resource);
+    if (NULL != res) {
+        mReloadConfig->saveSettings(res);
+        mSaveConfig->saveSettings(res);
+
+        CalDavPrefs* p = getPrefs(res);
+        if (NULL != p) {
+            p->setUrl(mUrl->text());
+            p->setUsername(mUsername->text());
+            p->setRememberPassword(mRememberPassword->isChecked());
+            p->setPassword(mPassword->text());
+        }
+    }
+}
+
+void ResourceCalDavConfig::setupUI() {
+    QVBoxLayout *vertical = new QVBoxLayout(this);
+
+    QGridLayout *mainLayout = new QGridLayout( this );
+
+    // URL
+    QLabel *label = new QLabel( i18n( "URL:" ), this );
+    mUrl = new QLineEdit( this );
+    mainLayout->addWidget( label, 1, 0 );
+    mainLayout->addWidget( mUrl, 1, 1 );
+
+    // Username
+    label = new QLabel( i18n( "Username:" ), this );
+    mUsername = new QLineEdit( this );
+    mainLayout->addWidget( label, 2, 0 );
+    mainLayout->addWidget( mUsername, 2, 1 );
+
+    // Password
+    label = new QLabel( i18n( "Password:" ), this );
+    mPassword = new QLineEdit( this );
+    mPassword->setEchoMode( QLineEdit::Password );
+    mainLayout->addWidget( label, 3, 0 );
+    mainLayout->addWidget( mPassword, 3, 1 );
+
+    // Remember password checkbox
+    mRememberPassword = new QCheckBox( i18n("Remember password"), this );
+    mainLayout->addWidget(mRememberPassword, 4, 1);
+
+    // configs
+    QHBoxLayout* horizontal = new QHBoxLayout(this);
+
+    // Reload config
+    mReloadConfig = new CalDavReloadConfig(this);
+    horizontal->addWidget(mReloadConfig);
+
+    // Save config
+    mSaveConfig = new CalDavSaveConfig(this);
+    horizontal->addWidget(mSaveConfig);
+
+    // FIXME: This feature does not work; hide the UI elements for later use
+    mRememberPassword->hide();
+    label->hide();
+    mPassword->hide();
+
+    // combining layouts
+    vertical->addLayout(mainLayout);
+    vertical->addLayout(horizontal);
+}
+
+// EOF ========================================================================
diff --git a/kresources/caldav/config.h b/kresources/caldav/config.h
new file mode 100644
index 00000000..5b032599
--- /dev/null
+++ b/kresources/caldav/config.h
@@ -0,0 +1,80 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Configuration and properties dialog
+ ========================================================================*/
+
+#ifndef KCAL_RESOURCECALDAVCONFIG_H
+#define KCAL_RESOURCECALDAVCONFIG_H
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#include "resource.h"
+
+#include <kdemacros.h>
+#include <kresources/configwidget.h>
+
+class QLineEdit;
+class QCheckBox;
+
+namespace KCal {
+
+class CalDavReloadConfig;
+class CalDavSaveConfig;
+
+/*=========================================================================
+| CLASS
+ ========================================================================*/
+
+/**
+ * Configuration widget for CalDAV resource.
+ */
+class KDE_EXPORT ResourceCalDavConfig : public KRES::ConfigWidget
+{
+    Q_OBJECT
+
+public:
+
+    ResourceCalDavConfig(QWidget *parent = 0);
+
+public slots:
+
+    virtual void loadSettings(KRES::Resource *resource);
+    virtual void saveSettings(KRES::Resource *resource);
+
+protected:
+
+    virtual void setupUI();
+
+private:
+
+    QLineEdit *mUrl;
+    QLineEdit *mUsername;
+    QLineEdit *mPassword;
+    QCheckBox *mRememberPassword;
+    CalDavReloadConfig* mReloadConfig;
+    CalDavSaveConfig* mSaveConfig;
+
+    static ResourceCalDav* getCalDavResource(KRES::Resource* res);
+
+    /**
+     * Returns preferences of the given ResourceCalDav object.
+     * @param res resource object.
+     * @return if preferences object is obtained successfully, it's returned. Otherwise, NULL is returned.
+     */
+    static CalDavPrefs* getPrefs(ResourceCalDav* res);
+};
+
+} // namespace KCal
+
+
+#endif //  KCAL_RESOURCECALDAVCONFIG_H
+
diff --git a/kresources/caldav/configwidgets.cpp b/kresources/caldav/configwidgets.cpp
new file mode 100644
index 00000000..f586af16
--- /dev/null
+++ b/kresources/caldav/configwidgets.cpp
@@ -0,0 +1,246 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Automatic Reload / Automatic Save configuration widgets.
+| The code is mostly taken from resourcecachedconfig.h/cpp files from
+| the kcal library and changed to meet our requirements.
+| The original copyright is below.
+ ========================================================================*/
+/*
+  This file is part of the kcal library.
+
+  Copyright (c) 2004 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., 51 Franklin Street, Fifth Floor,
+  Boston, MA 02110-1301, USA.
+*/
+
+#include "configwidgets.h"
+
+#include <libkcal/resourcecached.h>
+
+#include <klocale.h>
+#include <kdebug.h>
+
+#include <qlabel.h>
+#include <qlayout.h>
+#include <qcheckbox.h>
+#include <qradiobutton.h>
+#include <qspinbox.h>
+#include <qbuttongroup.h>
+#include <qgroupbox.h>
+
+using namespace KCal;
+
+//@cond PRIVATE
+class CalDavConfigPrivate
+{
+  public:
+    CalDavConfigPrivate()
+      : mGroup( 0 ),
+        mIntervalSpin( 0 ) {}
+
+    QButtonGroup *mGroup;
+    QSpinBox *mIntervalSpin;
+};
+
+class CalDavReloadConfig::Private
+  : public CalDavConfigPrivate
+{
+};
+
+class CalDavSaveConfig::Private
+  : public CalDavConfigPrivate
+{
+};
+//@endcond
+
+CalDavReloadConfig::CalDavReloadConfig( QWidget *parent )
+  : QWidget( parent ), d( new KCal::CalDavReloadConfig::Private() )
+{
+  QBoxLayout *topLayout = new QVBoxLayout( this );
+
+  //QGroupBox *groupBox = new QGroupBox( i18nc( "@title:group", "Automatic Reload" ), this );
+  QGroupBox *groupBox = new QGroupBox( i18n( "Automatic Reload" ), this );
+  topLayout->addWidget( groupBox );
+
+  QRadioButton *noAutomaticReload =
+    new QRadioButton(
+      //i18nc( "@option:radio never reload the cache", "Never" ), groupBox );
+      i18n( "Never" ), groupBox );
+  QRadioButton *automaticReloadOnStartup =
+    new QRadioButton(
+      //i18nc( "@option:radio reload the cache on startup", "Only on startup" ), groupBox );
+      i18n( "Only on startup" ), groupBox );
+  QRadioButton *intervalRadio =
+    new QRadioButton(
+//       i18nc( "@option:radio reload the cache at regular intervals",
+//              "Regular interval" ), groupBox );
+      i18n( "Regular interval" ), groupBox );
+
+  d->mGroup = new QButtonGroup( this );
+  d->mGroup->hide();
+  d->mGroup->insert( intervalRadio, 2 );
+  d->mGroup->insert( automaticReloadOnStartup, 1 );
+  d->mGroup->insert( noAutomaticReload, 0 );
+
+  connect( intervalRadio, SIGNAL( toggled( bool ) ),
+           SLOT( slotIntervalToggled( bool ) ) );
+
+  QHBox *intervalBox = new QHBox( groupBox );
+  //new QLabel( i18nc( "@label:spinbox", "Interval in minutes:" ), intervalBox );
+  new QLabel( i18n( "Interval in minutes:" ), intervalBox );
+  d->mIntervalSpin = new QSpinBox( intervalBox );
+  d->mIntervalSpin->setRange( 1, 900 );
+  d->mIntervalSpin->setEnabled( false );
+
+  groupBox->setColumnLayout(1, Qt::Vertical);
+  QVBoxLayout *vbox = new QVBoxLayout(groupBox->layout());
+  vbox->addWidget(intervalRadio);
+  vbox->addWidget(intervalBox);
+  vbox->addWidget(automaticReloadOnStartup);
+  vbox->addWidget(noAutomaticReload);
+  vbox->addStretch(1);
+}
+
+CalDavReloadConfig::~CalDavReloadConfig()
+{
+   delete d;
+}
+
+void CalDavReloadConfig::loadSettings( ResourceCached *resource )
+{
+  d->mIntervalSpin->setValue( resource->reloadInterval() );
+  d->mGroup->setButton( resource->reloadPolicy() );
+}
+
+void CalDavReloadConfig::saveSettings( ResourceCached *resource )
+{
+  resource->setReloadInterval( d->mIntervalSpin->value() );
+  resource->setReloadPolicy( d->mGroup->selectedId() );
+}
+
+void CalDavReloadConfig::slotIntervalToggled( bool checked )
+{
+  if ( checked ) {
+    d->mIntervalSpin->setEnabled( true );
+  } else {
+    d->mIntervalSpin->setEnabled( false );
+  }
+}
+
+CalDavSaveConfig::CalDavSaveConfig( QWidget *parent )
+  : QWidget( parent ), d( new KCal::CalDavSaveConfig::Private() )
+{
+  QBoxLayout *topLayout = new QVBoxLayout( this );
+
+  //QGroupBox *groupBox = new QGroupBox( i18nc( "@title:group", "Automatic Save" ), this );
+  QGroupBox *groupBox = new QGroupBox( i18n( "Automatic Save" ), this );
+  d->mGroup = new QButtonGroup( this );
+  d->mGroup->hide();
+  topLayout->addWidget( groupBox );
+
+  QRadioButton *never =
+    new QRadioButton(
+      //i18nc( "@option:radio never save the cache automatically", "Never" ), groupBox );
+      i18n( "Never" ), groupBox );
+  QRadioButton *onExit =
+    new QRadioButton(
+      //i18nc( "@option:radio save the cache on exit", "Only on exit" ), groupBox );
+      i18n( "Only on exit" ), groupBox );
+
+  QRadioButton *intervalRadio =
+    new QRadioButton(
+      //i18nc( "@option:radio save the cache at regular intervals", "Regular interval" ), groupBox );
+      i18n( "Regular interval" ), groupBox );
+
+  d->mGroup = new QButtonGroup( this );
+  d->mGroup->hide();
+  d->mGroup->insert( never, 0 );
+  d->mGroup->insert( onExit, 1 );
+  d->mGroup->insert( intervalRadio, 2 );
+
+  connect( intervalRadio, SIGNAL( toggled( bool ) ),
+           SLOT( slotIntervalToggled( bool ) ) );
+
+  QHBox *intervalBox = new QHBox( groupBox );
+  //new QLabel( i18nc( "@label:spinbox", "Interval in minutes:" ), intervalBox );
+  new QLabel( i18n( "Interval in minutes:" ), intervalBox );
+  d->mIntervalSpin = new QSpinBox( intervalBox );
+  d->mIntervalSpin->setRange( 1, 900 );
+  d->mIntervalSpin->setEnabled( false );
+
+  QRadioButton *delay =
+    new QRadioButton(
+//       i18nc( "@option:radio save the cache after some delay",
+//              "Delayed after changes" ), groupBox );
+      i18n( "Delayed after changes" ), groupBox );
+  QRadioButton *every =
+    new QRadioButton(
+//       i18nc( "@option:radio save the cache after every modification",
+//              "Immediately after changes" ), groupBox );
+      i18n( "Immediately after changes" ), groupBox );
+  d->mGroup->insert( delay, 3 );
+  d->mGroup->insert( every, 4 );
+
+  // hide unwanted widgets. They may be useful in future, so don't delete them for now.
+  intervalRadio->hide();
+  intervalBox->hide();
+
+  groupBox->setColumnLayout(1, Qt::Vertical);
+  QVBoxLayout *vbox = new QVBoxLayout(groupBox->layout());
+  vbox->addWidget(delay);
+  vbox->addWidget(every);
+  vbox->addWidget(intervalRadio);
+  vbox->addWidget(intervalBox);
+  vbox->addWidget(onExit);
+  vbox->addWidget(never);
+  vbox->addStretch(1);
+
+}
+
+CalDavSaveConfig::~CalDavSaveConfig()
+{
+  delete d;
+}
+
+void CalDavSaveConfig::loadSettings( ResourceCached *resource )
+{
+  d->mIntervalSpin->setValue( resource->saveInterval() );
+  d->mGroup->setButton( resource->savePolicy() );
+}
+
+void CalDavSaveConfig::saveSettings( ResourceCached *resource )
+{
+  resource->setSaveInterval( d->mIntervalSpin->value() );
+  resource->setSavePolicy( d->mGroup->selectedId() );
+}
+
+void CalDavSaveConfig::slotIntervalToggled( bool checked )
+{
+  if ( checked ) {
+    d->mIntervalSpin->setEnabled( true );
+  } else {
+    d->mIntervalSpin->setEnabled( false );
+  }
+}
+
+// EOF ========================================================================
diff --git a/kresources/caldav/configwidgets.h b/kresources/caldav/configwidgets.h
new file mode 100644
index 00000000..6a44d482
--- /dev/null
+++ b/kresources/caldav/configwidgets.h
@@ -0,0 +1,100 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Automatic Reload / Automatic Save configuration widgets.
+| The code is mostly taken from resourcecachedconfig.h/cpp files from
+| the kcal library and changed to meet our requirements.
+| The original copyright is below.
+ ========================================================================*/
+/*
+  This file is part of the kcal library.
+
+  Copyright (c) 2004 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., 51 Franklin Street, Fifth Floor,
+  Boston, MA 02110-1301, USA.
+*/
+#ifndef KCALDAV_AUTOWIDGETS_H
+#define KCALDAV_AUTOWIDGETS_H
+
+#include <qwidget.h>
+#include <kdemacros.h>
+
+namespace KCal {
+
+class ResourceCached;
+
+/**
+  Configuration widget for reload policy
+
+  @see ResourceCached
+*/
+class KDE_EXPORT CalDavReloadConfig : public QWidget
+{
+  Q_OBJECT
+  public:
+    explicit CalDavReloadConfig( QWidget *parent = 0 );
+    ~CalDavReloadConfig();
+  public slots:
+    void loadSettings( ResourceCached *resource );
+    void saveSettings( ResourceCached *resource );
+
+  protected slots:
+    void slotIntervalToggled( bool );
+
+  private:
+    //@cond PRIVATE
+    //Q_DISABLE_COPY( CalDavReloadConfig )
+    class Private;
+    Private *const d;
+    //@endcond
+};
+
+/**
+  Configuration widget for save policy
+
+  @see ResourceCached
+*/
+class KDE_EXPORT CalDavSaveConfig : public QWidget
+{
+    Q_OBJECT
+  public:
+    explicit CalDavSaveConfig( QWidget *parent = 0 );
+    ~CalDavSaveConfig();
+
+  public slots:
+    void loadSettings( ResourceCached *resource );
+    void saveSettings( ResourceCached *resource );
+
+  protected slots:
+    void slotIntervalToggled( bool );
+
+  private:
+    //@cond PRIVATE
+    //Q_DISABLE_COPY( CalDavSaveConfig )
+    class Private;
+    Private *const d;
+    //@endcond
+};
+
+}
+
+#endif // KCALDAV_AUTOWIDGETS_H
diff --git a/kresources/caldav/export.h b/kresources/caldav/export.h
new file mode 100644
index 00000000..40dde126
--- /dev/null
+++ b/kresources/caldav/export.h
@@ -0,0 +1,56 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Some support macros.
+| The code is mostly taken from KDE source files.
+| The original copyright is below.
+ ========================================================================*/
+/*  This file is part of the KDE project
+    Copyright (C) 2008 Jarosław Staniek <staniek@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., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#ifndef KRESOURCES_KDEPIM_EXPORT_H
+#define KRESOURCES_KDEPIM_EXPORT_H
+
+/** Exports a function returning kresources plugin factory, for resource class @a resourceclass,
+ *  @a resourceconfigclass config class and @a catalog catalog.
+ */
+#define EXPORT_KRESOURCES_PLUGIN( resourceclass, resourceconfigclass, catalog ) \
+  typedef KRES::PluginFactory< resourceclass, resourceconfigclass > FactoryBase; \
+  class Factory : public FactoryBase { \
+    public: Factory() { KGlobal::locale()->insertCatalogue(catalog); } \
+  }; \
+  K_EXPORT_PLUGIN( Factory )
+
+/** Like EXPORT_KRESOURCES_PLUGIN but allows to specify two catalogs.
+ */
+#define EXPORT_KRESOURCES_PLUGIN2( resourceclass, resourceconfigclass, catalog1, catalog2 ) \
+  typedef KRES::PluginFactory< resourceclass, resourceconfigclass > FactoryBase; \
+  class Factory : public FactoryBase { \
+    public: Factory() { KGlobal::locale()->insertCatalogue(catalog1); \
+      KGlobal::locale()->insertCatalogue(catalog2); } \
+  }; \
+  K_EXPORT_PLUGIN( Factory )
+
+#endif
diff --git a/kresources/caldav/job.cpp b/kresources/caldav/job.cpp
new file mode 100644
index 00000000..f9fbb94c
--- /dev/null
+++ b/kresources/caldav/job.cpp
@@ -0,0 +1,105 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Job class for accessing remote calendars.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#include "job.h"
+#include <kdebug.h>
+
+#include <qmutex.h>
+
+#define log(s)      kdDebug() << s;
+
+/*=========================================================================
+| NAMESPACE
+ ========================================================================*/
+
+using namespace KCal;
+
+/*=========================================================================
+| STATIC
+ ========================================================================*/
+
+/*=========================================================================
+| CONSTRUCTOR AND DESTRUCTOR
+ ========================================================================*/
+
+CalDavJob::CalDavJob(const QString& url) {
+    cleanJob();
+    setUrl(url);
+}
+
+CalDavJob::~CalDavJob() {
+}
+
+
+/*=========================================================================
+| METHODS
+ ========================================================================*/
+
+void CalDavJob::enableCaldavDebug(runtime_info* rt) {
+    if (rt && rt->options) {
+        rt->options->debug = 0; // if debug = 1, it causes major CPU overhead
+        rt->options->verify_ssl_certificate = FALSE;
+    }
+}
+
+void CalDavJob::setErrorString(const QString& err, const long number) {
+    mError = true;
+    mErrorString = err;
+    mErrorNumber = number;
+}
+
+void CalDavJob::processError(const caldav_error* err) {
+    QString error_string;
+
+    long code = err->code;
+
+    if (-401 == code) { // unauthorized
+        error_string = i18n("Unauthorized. Username or password incorrect.");
+    } else if (-599 <= code && code <= -300) {
+        error_string = i18n("HTTP error %1. Maybe, URL is not a CalDAV resource.").arg(-code);
+    } else {
+        error_string = err->str;
+    }
+
+    setErrorString(error_string, code);
+}
+
+
+void CalDavJob::run() {
+    log("cleaning job");
+    cleanJob();
+
+    int res = OK;
+
+    runtime_info* caldav_runtime = caldav_get_runtime_info();
+
+#ifdef KCALDAV_DEBUG
+    log("setting debug caldav options");
+    enableCaldavDebug(caldav_runtime);
+#endif // KCALDAV_DEBUG
+
+    log("running job");
+    res = runJob(caldav_runtime);
+
+    if (OK != res) {
+        log("job failed");
+        processError(caldav_runtime->error);
+    }
+
+    caldav_free_runtime_info(&caldav_runtime);
+}
+
+// EOF ========================================================================
diff --git a/kresources/caldav/job.h b/kresources/caldav/job.h
new file mode 100644
index 00000000..853ef561
--- /dev/null
+++ b/kresources/caldav/job.h
@@ -0,0 +1,131 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Job class for accessing remote calendars.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#ifndef KCALDAV_JOB_H
+#define KCALDAV_JOB_H
+
+#include <qthread.h>
+#include <qstring.h>
+#include <qdatetime.h>
+
+extern "C" {
+    #include <libcaldav/caldav.h>
+}
+
+namespace KCal {
+
+/*=========================================================================
+| CLASS
+ ========================================================================*/
+
+/**
+ * Calendar job.
+ */
+class CalDavJob : public QThread {
+
+public:
+
+    /**
+     * @param url URL to load.
+     */
+    CalDavJob(const QString& url = QString());
+
+    virtual ~CalDavJob();
+
+    /**
+     * Sets a new URL to load.
+     */
+    virtual void setUrl(const QString& s) {
+        mUrl = s;
+    }
+
+    /**
+     * @return URL to load.
+     */
+    virtual QString url() const {
+        return mUrl;
+    }
+
+    /**
+     * @return true if downloading process failed.
+     */
+    virtual bool error() const {
+        return mError;
+    }
+
+    /**
+     * @return an error string.
+     */
+    virtual QString errorString() const {
+        return mErrorString;
+    }
+
+    /**
+     * @return an error number.
+     */
+    virtual long errorNumber() const {
+        return mErrorNumber;
+    }
+
+protected:
+
+    virtual void run();
+
+    /**
+     * Main run method for jobs. Jobs should not override run() method.
+     * Instead of this they should override this one.
+     * @param caldavRuntime specific libcaldav runtime information. This pointer should not be saved for the usage
+     * outside of runJob.
+     * @return libcaldav response code (see CALDAV_RESPONSE)
+     */
+    virtual int runJob(runtime_info* caldavRuntime) = 0;
+
+    /**
+     * Some cleaning. Jobs may (and usually should) override this method.
+     */
+    virtual void cleanJob() {
+        mError = false;
+        mErrorString = "";
+        mErrorNumber = 0;
+    }
+
+    /**
+     * Sets an error string to @p err. Also sets an error flag.
+     */
+    void setErrorString(const QString& str, const long number);
+
+    /**
+     * Process an error.
+     * Subclasses can overwrite this method, if some special error message handling
+     * should be done. Call setErrorString() to set the error after processing is done.
+     * @param err error structure.
+     */
+    virtual void processError(const caldav_error* err);
+
+private:
+
+    QString mUrl;
+    bool mError;
+    QString mErrorString;
+    long mErrorNumber;
+
+    void enableCaldavDebug(runtime_info*);
+};
+
+} // namespace KCal
+
+#endif // KCALDAV_JOB_H
+
diff --git a/kresources/caldav/kcal_caldav.desktop b/kresources/caldav/kcal_caldav.desktop
new file mode 100644
index 00000000..a49607a4
--- /dev/null
+++ b/kresources/caldav/kcal_caldav.desktop
@@ -0,0 +1,52 @@
+[Desktop Entry]
+Name=CalDAV Server (e.g. Google Calendar)
+Name[af]=CalDAV bediener (bv. Google Calendar)
+Name[bg]=Сървър CalDAV (e.g. Google Calendar)
+Name[br]=Servijer CalDAV (e.g. Google Calendar)
+Name[ca]=Servidor CalDAV (p.ex. Google Calendar)
+Name[cs]=CalDAV server (např. Google Calendar)
+Name[da]=CalDAV-server (f.eks. Google Calendar)
+Name[de]=CalDAV-Server (z. B. Google Calendar)
+Name[el]=Εξυπηρετητής CalDAV (π.χ. Google Calendar)
+Name[es]=Servidor CalDAV (por ejemplo, Google Calendar)
+Name[et]=CalDAV server (nt. Google Calendar)
+Name[eu]=CalDAV zerbitzaria (adib. Google Calendar)
+Name[fa]=کارساز CalDAV (مثلاً Google Calendar)
+Name[fi]=CalDAV-palvelin (esim. Google Calendar)
+Name[fr]=CalDAV Serveur (ex. Google Calendar)
+Name[fy]=CalDAV-tsjinner (Google Calendar)
+Name[ga]=Freastalaí CalDAV (m.sh. Google Calendar)
+Name[gl]=Servidor CalDAV (e.g. Google Calendar)
+Name[hu]=CalDAV-kiszolgáló (pl. Google Calendar)
+Name[is]=CalDAV þjónn (t.d. Google Calendar)
+Name[it]=Server CalDAV (per es. Google Calendar)
+Name[ja]=CalDAV サーバ (例 Google Calendar)
+Name[ka]=სერვერი CalDAV (მაგ., Google Calendar)
+Name[kk]=CalDAV сервері (мысалы Google Calendar)
+Name[km]=ម៉ាស៊ីន​បម្រើ CalDAV (ឧ. Google Calendar)
+Name[lt]=CalDAV serveris (pvz.: Google Calendar)
+Name[ms]=Pelayan CalDAV  (misalnya Google Calendar)
+Name[nb]=CalDAV-tjener (f.eks. Google Calendar)
+Name[nds]=CalDAV-Server (t.B. Google Calendar)
+Name[ne]=समूह DAV सर्भर (जस्तै: खुला ग्रुपवेयर)
+Name[nl]=CalDAV-server (Google Calendar)
+Name[nn]=CalDAV-tenar (t.d. Google Calendar)
+Name[pl]=Serwer CalDAV (np. Google Calendar)
+Name[pt]=Servidor CalDAV (por exemplo Google Calendar)
+Name[pt_BR]=Servidor GroupDav (p. ex. Google Calendar)
+Name[ru]=Сервер CalDAV (например, Google Calendar)
+Name[sk]=CalDAV Server (napr. Google Calendar)
+Name[sl]=Strežnik CalDAV (npr. Google Calendar)
+Name[sr]=CalDAV сервер (нпр. Google Calendar)
+Name[sr@Latn]=CalDAV server (npr. Google Calendar)
+Name[sv]=CalDAV-server (t.ex. Google Calendar)
+Name[ta]=CalDAV சேவகன் (e.g. Google Calendar)
+Name[tr]=CalDAV Sunucusu (ör. Google Calendar)
+Name[uk]=Сервер CalDAV (напр., Google Calendar)
+Name[zh_CN]=CalDAV 服务器(如 Google Calendar)
+Name[zh_TW]=CalDAV 伺服器 (如: Google Calendar)
+X-KDE-Library=kcal_caldav
+Type=Service
+ServiceTypes=KResources/Plugin
+X-KDE-ResourceFamily=calendar
+X-KDE-ResourceType=caldav
diff --git a/kresources/caldav/plugin.cpp b/kresources/caldav/plugin.cpp
new file mode 100644
index 00000000..ffccf678
--- /dev/null
+++ b/kresources/caldav/plugin.cpp
@@ -0,0 +1,49 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| CalDAV resource factory.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#include "resource.h"
+#include "config.h"
+#include "export.h"
+
+#include <kglobal.h>
+#include <klocale.h>
+
+/*=========================================================================
+| NAMESPACE
+ ========================================================================*/
+
+using namespace KCal;
+
+/*=========================================================================
+| CLASS
+ ========================================================================*/
+
+// Creates the resource factory.
+//EXPORT_KRESOURCES_PLUGIN2( ResourceCalDav, ResourceCalDavConfig, "libkcal", "kres_caldav" )
+
+typedef KRES::PluginFactory<ResourceCalDav, ResourceCalDavConfig> CalDavFactory;
+
+extern "C"
+{
+  void *init_kcal_caldav()
+  {
+    KGlobal::locale()->insertCatalogue( "libkcal" );
+    KGlobal::locale()->insertCatalogue( "kres_caldav" );
+    return new CalDavFactory;
+  }
+}
+
+// EOF ========================================================================
diff --git a/kresources/caldav/preferences.cpp b/kresources/caldav/preferences.cpp
new file mode 100644
index 00000000..04ca2238
--- /dev/null
+++ b/kresources/caldav/preferences.cpp
@@ -0,0 +1,221 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| CalDAV resource preferences class.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#include "preferences.h"
+
+#include <kwallet.h>
+#include <qstring.h>
+#include <qurl.h>
+#include <kdebug.h>
+
+/*=========================================================================
+| NAMESPACES
+ ========================================================================*/
+
+using namespace KCal;
+using namespace KWallet;
+
+/*=========================================================================
+| CONSTANTS
+ ========================================================================*/
+
+const QString CalDavPrefs::NO_PASSWORD = "";
+const QString CalDavPrefs::WALLET_FOLDER = "CalDAV resource";
+const QString CalDavPrefs::WALLET_PWD_SUFFIX = ":caldav_password";
+
+/*=========================================================================
+| METHODS
+ ========================================================================*/
+
+bool CalDavPrefs::setWalletFolder(const QString& folder) {
+    bool ret = true;
+
+    if (!mNoWallet && NULL != mWallet) {
+        if (!mWallet->hasFolder(folder)) {
+            if (!mWallet->createFolder(folder)) {
+                ret = false;
+                kdWarning() << "can't create the wallet folder for CalDAV passwords";
+            }
+        }
+        if (!mWallet->setFolder(folder)) {
+            ret = false;
+            kdWarning() << "can't set the wallet folder for CalDAV passwords";
+        }
+    } else {
+        // the wallet is inaccessible or not configured
+        ret = false;
+    }
+
+    return ret;
+}
+
+Wallet* CalDavPrefs::getWallet() {
+    Wallet* ret = NULL;
+
+    if (!mNoWallet) {
+        // the wallet is not marked as inaccessible
+
+        if (NULL == mWallet) {
+            kdDebug() << "creating wallet for " + mPrefix;
+
+            mWallet = Wallet::openWallet(Wallet::NetworkWallet(), 0);
+            if (NULL == mWallet) {
+                mNoWallet = true; // can't open the wallet, mark it inaccessible
+                kdWarning() << "can't create a wallet for CalDAV passwords";
+            } else {
+                if (setWalletFolder(WALLET_FOLDER)) {
+                    // reserved
+                } else {
+                    // can't set the wallet folder, remove the wallet and mark it inaccessible
+                    kdWarning() << "can't set the walet folder for CalDAV passwords";
+                    removeWallet(true);
+                }
+            }
+        }
+
+        ret = mWallet;
+    }
+
+    return ret;
+}
+
+void CalDavPrefs::removeWallet(bool noWallet) {
+    delete mWallet;
+    mWallet = NULL;
+    mNoWallet = noWallet;
+}
+
+void CalDavPrefs::addPrefix(const QString& prefix) {
+    KConfigSkeletonItem::List itemList = items();
+    KConfigSkeletonItem::List::Iterator it;
+
+    for ( it = itemList.begin(); it != itemList.end(); ++it ) {
+        (*it)->setGroup( prefix + ':' + (*it)->group() );
+    }
+}
+
+bool CalDavPrefs::writePasswordToWallet(const QString& password) {
+
+    Wallet* w = getWallet();
+
+    bool ret = false;
+    if (NULL != w) {
+        int rc = w->writePassword(mPrefix + WALLET_PWD_SUFFIX, password);
+        if (0 != rc) {
+            kdWarning() << "CalDAV: can't write password to the wallet";
+        } else {
+            ret = true;
+        }
+    }
+
+    return ret;
+}
+
+bool CalDavPrefs::readPasswordFromWallet(QString& password) {
+    Wallet* w = getWallet();
+
+    bool ret = false;
+    if (NULL != w) {
+        QString p;
+        int rc = w->readPassword(mPrefix + WALLET_PWD_SUFFIX, p);
+        if (0 == rc) {
+            //CalDavPrefsSkel::setPassword(p);
+            password = p;
+            ret = true;
+        } else {
+            kdWarning() << "CalDAV: can't read password from the wallet";
+            password = NO_PASSWORD;
+        }
+    }
+
+    return ret;
+}
+
+bool CalDavPrefs::removePasswordFromWallet() {
+
+    Wallet* w = getWallet();
+
+    bool ret = false;
+    if (NULL != w) {
+        int rc = w->removeEntry(mPrefix + WALLET_PWD_SUFFIX);
+        if (0 == rc) {
+            ret = true;
+        } else {
+            kdWarning() << "CalDAV: can't remove password from the wallet";
+        }
+    }
+
+    return ret;
+}
+
+void CalDavPrefs::setPassword(const QString& p) {
+
+    mPassword = p;
+
+    if (rememberPassword()) {
+        writePasswordToWallet(p);
+    }
+}
+
+QString CalDavPrefs::password() {
+    if (NO_PASSWORD == mPassword) {
+        readPasswordFromWallet(mPassword);
+    }
+    return mPassword;
+}
+
+QString CalDavPrefs::getusername() {
+    return username();
+}
+
+void CalDavPrefs::setRememberPassword(bool v) {
+    kdDebug() << "remember: " << v;
+
+    CalDavPrefsSkel::setRememberPassword(v);
+
+    if (!v) {
+        // we should not remember password. If there is one already stored, it must be removed.
+        kdDebug() << "removing password from wallet";
+        removePasswordFromWallet();
+    }
+}
+
+void CalDavPrefs::writeConfig() {
+    CalDavPrefsSkel::writeConfig();
+}
+
+void CalDavPrefs::readConfig() {
+
+    CalDavPrefsSkel::readConfig();
+
+    // the password is not in config file, try to restore it from the wallet.
+    /*if (rememberPassword()) {
+        readPasswordFromWallet();
+    }*/
+}
+
+QString CalDavPrefs::getFullUrl() {
+
+    QUrl t(url());
+
+    t.setUser(username());
+    t.setPassword(password());
+
+    return t.toString();
+}
+
+// EOF ========================================================================
+
diff --git a/kresources/caldav/preferences.h b/kresources/caldav/preferences.h
new file mode 100644
index 00000000..b8c3bb19
--- /dev/null
+++ b/kresources/caldav/preferences.h
@@ -0,0 +1,154 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| CalDAV resource preferences class.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#ifndef KCAL_CALDAVPREFS_H
+#define KCAL_CALDAVPREFS_H
+
+#include "prefsskel.h"
+
+#include <kwallet.h>
+#include <kdebug.h>
+
+class QString;
+
+namespace KCal {
+
+/*=========================================================================
+| CLASS
+ ========================================================================*/
+
+/**
+ * This class provides access to ResourceCalDav preferences.
+ * It inherits auto-generated CalDavPrefsSkel class to add password-handling code.
+ * KWallet is used for storing passwords.
+ * It also adds code to allow multiple CalDAV resources to store settings in the same
+ * config file.
+ */
+class CalDavPrefs : public CalDavPrefsSkel {
+
+public:
+
+    /**
+     * @param prefix Unique prefix of the resource instance (use identifier() method).
+     */
+    CalDavPrefs(const QString& prefix)
+        : mWallet(NULL)
+        , mNoWallet(false)
+        , mPrefix(prefix)
+        , mPassword(NO_PASSWORD)
+    {
+        addPrefix(prefix);
+    }
+
+    virtual ~CalDavPrefs() {
+        kdDebug() << "removing wallet";
+        removeWallet();
+    }
+
+    virtual void writeConfig();
+    virtual void readConfig();
+
+    /**
+     * Sets a new password. Also, if remember password flag is true,
+     * remembers the password in the wallet. So, if you want the password
+     * to be properly saved, call this method after ensuring the remember flag
+     * is set.
+     */
+    void setPassword(const QString& p);
+
+    /**
+     * Returns password. The password is taken from the wallet.
+     * May return an empty string, if there is no password available.
+     */
+    QString password();
+
+    /**
+     * Returns the username.
+     */
+    QString getusername();
+
+    void setRememberPassword(bool v);
+
+    /**
+     * @return A full URL to connect to CalDAV server (including username and password).
+     */
+    QString getFullUrl();
+
+protected:
+
+    /**
+     * Add an unique prefix to KConfigGroup, so that different instances of the resource
+     * can use the same config file.
+     * @param prefix Unique prefix of the resource instance.
+     */
+    void addPrefix(const QString& prefix);
+
+    /**
+     * Returns the wallet or NULL, if the wallet can't be obtained.
+     */
+    KWallet::Wallet* getWallet();
+
+    /**
+     * Tries to set a working folder for the wallet. If the wallet is not configured yet, does nothing.
+     * @param folder the wallet working folder
+     * @return true, if the folder has been set, and false otherwise.
+     */
+    bool setWalletFolder(const QString& folder);
+
+    /**
+     * Removes the wallet. If @p noWallet is set, the wallet has been marked inaccessible, so that subsequent
+     * getWallet calls will not try to recreate it.
+     */
+    void removeWallet(bool noWallet = false);
+
+    /**
+     * Wrire password to the wallet.
+     * @param password password to write
+     * @return true on success, false on failure
+     */
+    bool writePasswordToWallet(const QString& password);
+
+    /**
+     * Extracts password from the wallet.
+     * @param password a variable to save read password to.
+     * @return true on success, false on failure
+     */
+    bool readPasswordFromWallet(QString& password);
+
+    /**
+     * Clears password in the wallet.
+     * @return true on success, false on failure
+     */
+    bool removePasswordFromWallet();
+
+private:
+
+    static const QString NO_PASSWORD;
+    static const QString WALLET_FOLDER;
+    static const QString WALLET_PWD_SUFFIX;
+
+    KWallet::Wallet* mWallet;
+    bool mNoWallet;
+
+    QString mPrefix;
+    QString mPassword;
+};
+
+} // namespace KCal
+
+#endif // KCAL_CALDAVPREFS_H
+
+
diff --git a/kresources/caldav/prefsskel.kcfg b/kresources/caldav/prefsskel.kcfg
new file mode 100644
index 00000000..39b79b85
--- /dev/null
+++ b/kresources/caldav/prefsskel.kcfg
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<kcfg xmlns="http://www.kde.org/standards/kcfg/1.0"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://www.kde.org/standards/kcfg/1.0
+      http://www.kde.org/standards/kcfg/1.0/kcfg.xsd" >
+ <kcfgfile name="kresources_caldavrc" />
+ <group name="General" >
+
+  <entry key="Url" type="String" >
+   <label>URL</label>
+  </entry>
+
+  <entry key="Username" type="String">
+   <label>User Name</label>
+  </entry>
+
+<!--  <entry key="Password" type="String" >
+   <label>Password</label>
+  </entry>-->
+
+  <entry key="RememberPassword" type="Bool" >
+   <label>Remember password</label>
+  </entry>
+
+ </group>
+</kcfg>
diff --git a/kresources/caldav/prefsskel.kcfgc b/kresources/caldav/prefsskel.kcfgc
new file mode 100644
index 00000000..b6b3aae0
--- /dev/null
+++ b/kresources/caldav/prefsskel.kcfgc
@@ -0,0 +1,7 @@
+# Code generation options for kconfig_compiler
+File=prefsskel.kcfg
+ClassName=CalDavPrefsSkel
+NameSpace=KCal
+Singleton=false
+Mutators=true
+GlobalEnums=true
diff --git a/kresources/caldav/reader.cpp b/kresources/caldav/reader.cpp
new file mode 100644
index 00000000..e4d4a6e6
--- /dev/null
+++ b/kresources/caldav/reader.cpp
@@ -0,0 +1,65 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Remote calendar loading.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#include "reader.h"
+#include <kdebug.h>
+
+/*=========================================================================
+| NAMESPACE
+ ========================================================================*/
+
+using namespace KCal;
+
+/*=========================================================================
+| METHODS
+ ========================================================================*/
+
+void CalDavReader::cleanJob() {
+    CalDavJob::cleanJob();
+    mData = "";
+}
+
+int CalDavReader::runJob(runtime_info* RT) {
+    kdDebug() << "reader::run, url: " << url();
+
+    response* result = caldav_get_response();
+    CALDAV_RESPONSE res = OK;
+
+    if (mGetAll) {
+        kdDebug() << "getting all objects";
+    	res = caldav_getall_object(result, std::string(url().ascii()).c_str(), RT);
+    } else {
+        kdDebug() << "getting object from the specified time range";
+        res = caldav_get_object(result, mTimeStart.toTime_t(), mTimeEnd.toTime_t(), std::string(url().ascii()).c_str(), RT);
+    }
+
+    if (OK == res) {
+        kdDebug() << "success";
+        if (result->msg) {
+            mData = result->msg;
+        } else {
+            kdDebug() << "empty collection";
+            // empty collection
+            mData = "";
+        }
+    }
+
+    caldav_free_response(&result);
+
+    return res;
+}
+
+// EOF ========================================================================
diff --git a/kresources/caldav/reader.h b/kresources/caldav/reader.h
new file mode 100644
index 00000000..070239fd
--- /dev/null
+++ b/kresources/caldav/reader.h
@@ -0,0 +1,92 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Remote calendar loading class.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#ifndef KCALDAV_LOADER_H
+#define KCALDAV_LOADER_H
+
+#include "job.h"
+
+#include <qstring.h>
+#include <qdatetime.h>
+
+namespace KCal {
+
+/*=========================================================================
+| CLASS
+ ========================================================================*/
+
+/**
+ * Calendar Reader.
+ */
+class CalDavReader : public CalDavJob {
+
+public:
+
+    /**
+     * @param url URL to load.
+     */
+    CalDavReader(const QString& url = QString()) :
+        CalDavJob(url)
+        , mGetAll(true)
+    {
+    }
+
+    /**
+     * Sets a time range. Only event between @p start and @p end will be loaded.
+     * This method call disables the effect of setGetAll() call.
+     * setGetAll() call disables the effect of this method.
+     */
+    void setRange(const QDateTime& start, const QDateTime& end) {
+        mGetAll = false;
+        mTimeStart = start;
+        mTimeEnd = end;
+    }
+
+    /**
+     * Sets the flag to load all events from the remote calendar.
+     * This method call disables the effect of setRange() call.
+     * setGetAll() call disables the effect of this method.
+     */
+    void setGetAll() {
+        mGetAll = true;
+    }
+
+    /**
+     * @return downloaded calendar data in iCal format.
+     */
+    QString data() const {
+        return mData;
+    }
+
+protected:
+
+    virtual int runJob(runtime_info* caldavRuntime);
+
+    virtual void cleanJob();
+
+private:
+
+    QString mData;
+    bool mGetAll;
+    QDateTime mTimeStart;
+    QDateTime mTimeEnd;
+
+};
+
+} // namespace KCal
+
+#endif // KCALDAV_LOADER_H
+
diff --git a/kresources/caldav/resource.cpp b/kresources/caldav/resource.cpp
new file mode 100644
index 00000000..31e2ce0c
--- /dev/null
+++ b/kresources/caldav/resource.cpp
@@ -0,0 +1,566 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Main interface to the KResource system.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#include <string.h>
+
+#include <qurl.h>
+#include <qmessagebox.h>
+#include <qapplication.h>
+#include <qeventloop.h>
+
+#include <libkcal/calendarlocal.h>
+#include <libkcal/icalformat.h>
+
+#include <klocale.h>
+#include <kpassdlg.h>
+
+#include <qdatetime.h>
+#include <qmutex.h>
+#include <qthread.h>
+
+#ifdef KCALDAV_DEBUG
+    #include <qfile.h>
+#endif
+
+#include "resource.h"
+#include "reader.h"
+#include "writer.h"
+
+/*=========================================================================
+| NAMESPACE
+ ========================================================================*/
+
+using namespace KCal;
+
+/*=========================================================================
+| CONSTANTS
+ ========================================================================*/
+
+const unsigned long ResourceCalDav::TERMINATION_WAITING_TIME = 3 * 1000; // 3 seconds
+const int ResourceCalDav::CACHE_DAYS = 90;
+
+const int ResourceCalDav::DEFAULT_RELOAD_INTERVAL   = 10;
+const int ResourceCalDav::DEFAULT_SAVE_INTERVAL     = 10;
+const int ResourceCalDav::DEFAULT_RELOAD_POLICY     = ResourceCached::ReloadInterval;
+const int ResourceCalDav::DEFAULT_SAVE_POLICY       = ResourceCached::SaveDelayed;
+
+/*=========================================================================
+| UTILITY
+ ========================================================================*/
+
+#define log(s)  kdDebug() << identifier() << ": " << (s);
+
+/*=========================================================================
+| CONSTRUCTOR / DESTRUCTOR
+ ========================================================================*/
+
+ResourceCalDav::ResourceCalDav( const KConfig *config ) :
+    ResourceCached(config)
+    , mLock(true)
+    , mPrefs(NULL)
+    , mLoader(NULL)
+    , mWriter(NULL)
+    , mLoadingQueueReady(true)
+    , mWritingQueueReady(true)
+{
+    log("ResourceCalDav(config)");
+    init();
+
+    if ( config ) {
+      readConfig( config );
+    }
+}
+
+ResourceCalDav::~ResourceCalDav() {
+    log("jobs termination");
+
+    // TODO: do we need termination here?
+
+    if (mLoader) {
+        mLoader->terminate();
+    }
+    if (mWriter) {
+        mWriter->terminate();
+    }
+
+    log("waiting for jobs terminated");
+
+    if (mLoader) {
+        mLoader->wait(TERMINATION_WAITING_TIME);
+    }
+    if (mWriter) {
+        mWriter->wait(TERMINATION_WAITING_TIME);
+    }
+
+    log("deleting jobs");
+
+    delete mLoader;
+    delete mWriter;
+
+    log("deleting preferences");
+
+    delete mPrefs;
+}
+
+/*=========================================================================
+| GENERAL METHODS
+ ========================================================================*/
+
+bool ResourceCalDav::doLoad() {
+    bool syncCache = true;
+
+    log(QString("doLoad(%1)").arg(syncCache));
+
+    clearCache();
+
+    log("loading from cache");
+    disableChangeNotification();
+    loadCache();
+    enableChangeNotification();
+
+    log("starting download job");
+    startLoading(mPrefs->getFullUrl());
+
+    return true;
+}
+
+bool ResourceCalDav::doSave() {
+    bool syncCache = true;
+
+    log(QString("doSave(%1)").arg(syncCache));
+
+    if (!hasChanges()) {
+        log("no changes");
+        return true;
+    }
+
+    log("saving cache");
+    saveCache();
+
+    log("start writing job");
+    startWriting(mPrefs->getFullUrl());
+
+    log("clearing changes");
+    // FIXME: Calling clearChanges() here is not the ideal way since the
+    // upload might fail, but there is no other place to call it...
+    clearChanges();
+
+    return true;
+}
+
+
+bool ResourceCalDav::doSave( bool syncCache, Incidence *incidence ) {
+    // To suppress warning about doSave(bool) method hides ResourceCached::doSave(bool, Incidence)
+    return ResourceCached::doSave();
+}
+
+KABC::Lock* ResourceCalDav::lock() {
+    log("lock()");
+    return &mLock;
+}
+
+void ResourceCalDav::readConfig( const KConfig *config ) {
+    log("readConfig");
+    mPrefs->readConfig();
+    ResourceCached::readConfig(config);
+}
+
+void ResourceCalDav::writeConfig( KConfig *config ) {
+    log("writeConfig()");
+    ResourceCalendar::writeConfig(config);
+    mPrefs->writeConfig();
+    ResourceCached::writeConfig(config);
+}
+
+CalDavPrefs* ResourceCalDav::createPrefs() const {
+    log("createPrefs()");
+    CalDavPrefs* p = new CalDavPrefs(identifier());
+    return p;
+}
+
+void ResourceCalDav::init() {
+    // default settings
+    setReloadInterval(DEFAULT_RELOAD_INTERVAL);
+    setReloadPolicy(DEFAULT_RELOAD_POLICY);
+    setSaveInterval(DEFAULT_SAVE_INTERVAL);
+    setSavePolicy(DEFAULT_SAVE_POLICY);
+
+    // creating preferences
+    mPrefs = createPrefs();
+
+    // creating jobs
+    // FIXME: Qt4 handles this quite differently, as shown below...
+//     mLoader = new CalDavReader;
+//     connect(mLoader, SIGNAL(finished()), this, SLOT(loadFinished()));
+//     mWriter = new CalDavWriter;
+//     connect(mWriter, SIGNAL(finished()), this, SLOT(writingFinished()));
+
+    // ...whereas Qt3 needs events like so:
+    mLoader = new CalDavReader;
+    //connect(mLoader, SIGNAL(finished()), this, SLOT(loadFinished()));
+    mWriter = new CalDavWriter;
+    //connect(mWriter, SIGNAL(finished()), this, SLOT(writingFinished()));
+
+    setType("ResourceCalDav");
+}
+
+void ResourceCalDav::setIncidencesReadOnly(Incidence::List& inc, bool readOnly) {
+    Incidence::List::Iterator it;
+    for ( it = inc.begin(); it != inc.end(); ++it ) {
+        (*it)->setReadOnly( readOnly );
+    }
+}
+
+void ResourceCalDav::ensureReadOnlyFlagHonored() {
+    //disableChangeNotification();
+
+    Incidence::List inc( rawIncidences() );
+    setIncidencesReadOnly(inc, readOnly());
+
+    //enableChangeNotification();
+
+    emit resourceChanged(this);
+}
+
+void ResourceCalDav::setReadOnly(bool v) {
+    KRES::Resource::setReadOnly(v);
+    log("ensuring read only flag honored");
+    ensureReadOnlyFlagHonored();
+}
+
+/*=========================================================================
+| READING METHODS
+ ========================================================================*/
+
+void ResourceCalDav::loadingQueuePush(const LoadingTask *task) {
+    mLoadingQueue.enqueue(task);
+    loadingQueuePop();
+}
+
+void ResourceCalDav::loadingQueuePop() {
+    if (!mLoadingQueueReady || mLoadingQueue.isEmpty()) {
+        return;
+    }
+
+    if (!mLoader) {
+        log("loader == NULL");
+        return;
+    }
+
+    // Loading queue and mLoadingQueueReady flag are not shared resources, i.e. only one thread has an access to them.
+    // That's why no mutexes are required.
+    LoadingTask *t = mLoadingQueue.head();
+
+    mLoader->setUrl(t->url);
+
+    QDateTime dt(QDate::currentDate());
+    mLoader->setRange(dt.addDays(-CACHE_DAYS), dt.addDays(CACHE_DAYS));
+    //mLoader->setGetAll();
+
+    mLoadingQueueReady = false;
+
+    log("starting actual download job");
+    mLoader->start(QThread::LowestPriority);
+
+    // if all ok, removing the task from the queue
+    mLoadingQueue.dequeue();
+
+    delete t;
+
+    // FIXME
+    // Qt3 needs to wait here for the download to finish, as I am too
+    // lazy to set up the correct event mechanisms at this time
+    // The correct mechanism would be to have the thread call
+    // QApplication::postEvent(), have the GUI trap the event,
+    // and then call loadFinished()
+    while (mLoader->running() == true)
+        qApp->eventLoop()->processEvents(QEventLoop::ExcludeUserInput);
+    loadFinished();
+}
+
+void ResourceCalDav::startLoading(const QString& url) {
+    LoadingTask *t = new LoadingTask;
+    t->url = url;
+    loadingQueuePush(t);
+}
+
+void ResourceCalDav::loadFinished() {
+    CalDavReader* loader = mLoader;
+
+    log("load finished");
+
+    if (!loader) {
+        log("loader is NULL");
+        return;
+    }
+
+    if (loader->error()) {
+        if (loader->errorNumber() == -401) {
+            if (NULL != mPrefs) {
+                QCString newpass;
+                if (KPasswordDialog::getPassword (newpass, QString("<b>") + i18n("Remote authorization required") + QString("</b><p>") + i18n("Please input the password for") + QString(" ") + mPrefs->getusername(), NULL) != 1) {
+                    log("load error: " + loader->errorString() );
+                    loadError(QString("[%1] ").arg(abs(loader->errorNumber())) + loader->errorString());
+                }
+                else {
+                    // Set new password and try again
+                    mPrefs->setPassword(QString(newpass));
+                    startLoading(mPrefs->getFullUrl());
+                }
+            }
+            else {
+                log("load error: " + loader->errorString() );
+                loadError(QString("[%1] ").arg(abs(loader->errorNumber())) + loader->errorString());
+            }
+        }
+        else {
+            log("load error: " + loader->errorString() );
+            loadError(QString("[%1] ").arg(abs(loader->errorNumber())) + loader->errorString());
+        }
+    } else {
+        log("successful load");
+        QString data = loader->data();
+
+        if (!data.isNull() && !data.isEmpty()) {
+            // TODO: I don't know why, but some schedules on http://caldav-test.ioda.net/ (I used it for testing)
+            // have some lines separated by single \r rather than \n or \r\n.
+            // ICalFormat fails to parse that.
+            data.replace("\r\n", "\n"); // to avoid \r\n becomes \n\n after the next line
+            data.replace('\r', '\n');
+
+            log("trying to parse...");
+            if (parseData(data)) {
+                log("... parsing is ok");
+                log("clearing changes");
+                clearChanges();
+                emit resourceLoaded(this);
+            }
+        }
+    }
+
+    // Loading queue and mLoadingQueueReady flag are not shared resources, i.e. only one thread has an access to them.
+    // That's why no mutexes are required.
+    mLoadingQueueReady = true;
+    loadingQueuePop();
+}
+
+bool ResourceCalDav::checkData(const QString& data) {
+    log("checking the data");
+
+    ICalFormat ical;
+    bool ret = true;
+    if (!ical.fromString(&mCalendar, data)) {
+        log("invalid ical string");
+        ret = false;
+    }
+
+    return ret;
+}
+
+bool ResourceCalDav::parseData(const QString& data) {
+    log("parseData()");
+
+    bool ret = true;
+
+    // check if the data is OK
+    // May be it's not efficient (parsing is done twice), but it should be safe
+    if (!checkData(data)) {
+        loadError(i18n("Parsing calendar data failed."));
+        return false;
+    }
+
+    log("clearing cache");
+    clearCache();
+    emit resourceChanged(this);
+
+    disableChangeNotification();
+
+    log("actually parsing the data");
+
+    ICalFormat ical;
+    if ( !ical.fromString( &mCalendar, data ) ) {
+        // this should never happen, but...
+        ret = false;
+    }
+
+    // debug code here -------------------------------------------------------
+#ifdef KCALDAV_DEBUG
+    const QString fout_path = "/tmp/kcaldav_download_" + identifier() + ".tmp";
+
+    QFile fout(fout_path);
+    if (fout.open(IO_WriteOnly | IO_Append)) {
+        QTextStream sout(&fout);
+        sout << "---------- " << resourceName() << ": --------------------------------\n";
+        sout << data << "\n";
+        fout.close();
+    } else {
+        loadError(i18n("can't open file"));
+    }
+#endif // KCALDAV_DEBUG
+    // end of debug code ----------------------------------------------------
+
+    enableChangeNotification();
+
+    if (ret) {
+        log("parsing is ok");
+        //if ( !noReadOnlyOnLoad() && readOnly() ) {
+        if ( readOnly() ) {
+            log("ensuring read only flag honored");
+            ensureReadOnlyFlagHonored();
+        }
+        log("saving to cache");
+        saveCache();
+    }
+
+    emit resourceChanged(this);
+
+    return ret;
+}
+
+/*=========================================================================
+| WRITING METHODS
+ ========================================================================*/
+
+QString ResourceCalDav::getICalString(const Incidence::List& inc) {
+    if (inc.isEmpty()) {
+        return "";
+    }
+
+    CalendarLocal loc(timeZoneId());
+    QString data = "";
+    ICalFormat ical;
+
+    // NOTE: This is very susceptible to invalid entries in added/changed/deletedIncidences
+    // Be very careful with clearChange/clearChanges, and be sure to clear after load and save...
+    for(Incidence::List::ConstIterator it = inc.constBegin(); it != inc.constEnd(); ++it) {
+        Incidence *i = (*it)->clone();
+        loc.addIncidence(i);
+    }
+
+    data = ical.toString(&loc);
+
+    return data;
+}
+
+void ResourceCalDav::writingQueuePush(const WritingTask *task) {
+//     printf("task->added: %s\n\r", task->added.ascii());
+//     printf("task->deleted: %s\n\r", task->deleted.ascii());
+//     printf("task->changed: %s\n\r", task->changed.ascii());
+    mWritingQueue.enqueue(task);
+    writingQueuePop();
+}
+
+void ResourceCalDav::writingQueuePop() {
+    // FIXME This crashes...
+
+    if (!mWritingQueueReady || mWritingQueue.isEmpty()) {
+        return;
+    }
+
+    if (!mWriter) {
+        log("writer == NULL");
+        return;
+    }
+
+    // Writing queue and mWritingQueueReady flag are not shared resources, i.e. only one thread has an access to them.
+    // That's why no mutexes are required.
+    WritingTask *t = mWritingQueue.head();
+
+    log("writingQueuePop: url = " + t->url);
+
+    mWriter->setUrl(t->url);
+
+#ifdef KCALDAV_DEBUG
+    const QString fout_path = "/tmp/kcaldav_upload_" + identifier() + ".tmp";
+
+    QFile fout(fout_path);
+    if (fout.open(IO_WriteOnly | IO_Append)) {
+        QTextStream sout(&fout);
+        sout << "---------- " << resourceName() << ": --------------------------------\n";
+        sout << "================== Added:\n" << t->added << "\n";
+        sout << "================== Changed:\n" << t->changed << "\n";
+        sout << "================== Deleted:\n" << t->deleted << "\n";
+        fout.close();
+    } else {
+        loadError(i18n("can't open file"));
+    }
+#endif // debug
+
+    mWriter->setAddedObjects(t->added);
+    mWriter->setChangedObjects(t->changed);
+    mWriter->setDeletedObjects(t->deleted);
+
+    mWritingQueueReady = false;
+
+    log("starting actual write job");
+    mWriter->start(QThread::LowestPriority);
+
+    // if all ok, remove the task from the queue
+    mWritingQueue.dequeue();
+
+    delete t;
+
+    // FIXME
+    // Qt3 needs to wait here for the download to finish, as I am too
+    // lazy to set up the correct event mechanisms at this time
+    // The correct mechanism would be to have the thread call
+    // QApplication::postEvent(), have the GUI trap the event,
+    // and then call writingFinished()
+    while (mWriter->running() == true)
+        qApp->eventLoop()->processEvents(QEventLoop::ExcludeUserInput);
+    writingFinished();
+}
+
+void ResourceCalDav::startWriting(const QString& url) {
+    log("startWriting: url = " + url);
+
+    WritingTask *t = new WritingTask;
+
+    Incidence::List added = addedIncidences();
+    Incidence::List changed = changedIncidences();
+    Incidence::List deleted = deletedIncidences();
+
+    t->url = url;
+    t->added = getICalString(added);		// This crashes when an event is added from the remote server and save() is subsequently called
+    t->changed = getICalString(changed);
+    t->deleted = getICalString(deleted);
+
+    writingQueuePush(t);
+}
+
+void ResourceCalDav::writingFinished() {
+    log("writing finished");
+
+    if (!mWriter) {
+        log("mWriter is NULL");
+        return;
+    }
+
+    if (mWriter->error()) {
+        log("error: " + mWriter->errorString());
+        saveError(QString("[%1] ").arg(abs(mWriter->errorNumber())) + mWriter->errorString());
+    } else {
+        log("success");
+        // is there something to do here?
+    }
+
+    // Writing queue and mWritingQueueReady flag are not shared resources, i.e. only one thread has an access to them.
+    // That's why no mutexes are required.
+    mWritingQueueReady = true;
+    writingQueuePop();
+}
+
+// EOF ========================================================================
diff --git a/kresources/caldav/resource.h b/kresources/caldav/resource.h
new file mode 100644
index 00000000..6b28c350
--- /dev/null
+++ b/kresources/caldav/resource.h
@@ -0,0 +1,220 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Main interface to the KResource system.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#ifndef KCAL_RESOURCECALDAV_H
+#define KCAL_RESOURCECALDAV_H
+
+#include "preferences.h"
+#include <qthread.h>
+#include <qptrqueue.h>
+
+#include <libkcal/resourcecached.h>
+
+#include <kabc/locknull.h>
+
+#include <kdepimmacros.h>
+#include <kconfig.h>
+
+namespace KCal {
+
+class CalDavReader;
+class CalDavWriter;
+
+/*=========================================================================
+| CLASS
+ ========================================================================*/
+
+/**
+ * This class provides a resource for accessing calendars via CalDAV protocol.
+ */
+class KDE_EXPORT ResourceCalDav : public ResourceCached
+{
+    Q_OBJECT
+
+public:
+
+    explicit ResourceCalDav( const KConfig *config );
+    virtual ~ResourceCalDav();
+
+    void readConfig( const KConfig *config );
+    void writeConfig( KConfig *config );
+
+    /**
+     * @return This resource preferences.
+     */
+    CalDavPrefs* prefs() {
+        return mPrefs;
+    }
+
+    /**
+     * @return This resource preferences.
+     */
+    const CalDavPrefs* prefs() const {
+        return mPrefs;
+    }
+
+    virtual void setReadOnly(bool v);
+
+protected slots:
+
+    void loadFinished();
+
+    void writingFinished();
+
+protected:
+
+    struct LoadingTask {
+        QString url;
+    };
+
+    struct WritingTask {
+        QString url;
+        QString added;
+        QString changed;
+        QString deleted;
+    };
+
+
+//     virtual bool doLoad( bool syncCache );
+//     virtual bool doSave( bool syncCache );
+
+    virtual bool doLoad();
+    virtual bool doSave();
+
+    virtual bool doSave( bool syncCache, Incidence *incidence );
+
+    virtual KABC::Lock* lock();
+
+    /**
+     * Creates prefs and configures them.
+     * @return a newly created preferences object. It should be removed by the caller.
+     */
+    CalDavPrefs* createPrefs() const;
+
+    /**
+     * Initializes internal state.
+     * Particulary, sets save and reload policies to default values,
+     * creates writing and reading jobs and preferences objects.
+     */
+    void init();
+
+    /**
+     * Initiates calendar loading process.
+     * @param url URL to load calendar data from.
+     */
+    void startLoading(const QString& url);
+
+    /**
+     * Checks if the data is correct and can be parsed.
+     * @param data ical string to check.
+     * @return true if the data is correct, false otherwise.
+     */
+    bool checkData(const QString& data);
+
+    /**
+     * Parses the data and adds events to the calendar.
+     * @param data calendar data.
+     * @return true on success, false on fail.
+     */
+    bool parseData(const QString& data);
+
+    /**
+     * Initiates calendar writing process.
+     * @param url URL to save calendar data to.
+     */
+    void startWriting(const QString& url);
+
+    /**
+     * Returns a list of incidences as a valid iCalendar string.
+     * @param inc list of incidences.
+     * @return a string in iCalendar format which describes the given incidences.
+     */
+    QString getICalString(const Incidence::List& inc);
+
+    /**
+     * Changes read-only status of incidences from a given list.
+     * @param inc list of incidences.
+     * @param readOnly read-only status that all the incidences should have after the method finishes.
+     */
+    static void setIncidencesReadOnly(Incidence::List& inc, bool readOnly);
+
+    /**
+     * Ensures incidences' read-only states are the same as the calendar's read-only state.
+     */
+    void ensureReadOnlyFlagHonored();
+
+    /**
+     * If the loading queue is empty or the loader is not ready, does nothing.
+     * Otherwise, pops a head element and starts a loading process for it.
+     */
+    void loadingQueuePop();
+
+    /**
+     * Pushes the given loading task to the loading queue.
+     * Then calls loadingQueuePop.
+     */
+    void loadingQueuePush(const LoadingTask *task);
+
+    /**
+     * If the writing queue is empty or the writer is not ready, does nothing.
+     * Otherwise, pops a head element and starts a writing process for it.
+     */
+    void writingQueuePop();
+
+    /**
+     * Pushes the given writing task to the writing queue.
+     * Then calls writingQueuePop.
+     */
+    void writingQueuePush(const WritingTask *task);
+
+private:
+
+    // constants: =============================================================
+
+    /// Termination waiting time in milliseconds. Used to terminate job threads.
+    static const unsigned long TERMINATION_WAITING_TIME;
+
+    /**
+     * Resource caches only events which are from the interval [-CACHE_DAYS, CACHE_DAYS].
+     */
+    static const int CACHE_DAYS;
+
+    static const int DEFAULT_RELOAD_INTERVAL;
+    static const int DEFAULT_SAVE_INTERVAL;
+    static const int DEFAULT_RELOAD_POLICY;
+    static const int DEFAULT_SAVE_POLICY;
+
+    // members: ===============================================================
+
+    KABC::LockNull mLock;
+    CalDavPrefs* mPrefs;
+    CalDavReader* mLoader;
+    CalDavWriter* mWriter;
+
+    bool mLoadingQueueReady;
+    QPtrQueue<LoadingTask> mLoadingQueue;
+
+    bool mWritingQueueReady;
+    QPtrQueue<WritingTask> mWritingQueue;
+
+};
+
+
+
+} // namespace KCal
+
+#endif // KCAL_RESOURCECALDAV_H
+
diff --git a/kresources/caldav/uninstall.desktop b/kresources/caldav/uninstall.desktop
new file mode 100644
index 00000000..e1e3e173
--- /dev/null
+++ b/kresources/caldav/uninstall.desktop
@@ -0,0 +1,2 @@
+[Desktop Entry]
+Hidden=true
diff --git a/kresources/caldav/writer.cpp b/kresources/caldav/writer.cpp
new file mode 100644
index 00000000..e2e87355
--- /dev/null
+++ b/kresources/caldav/writer.cpp
@@ -0,0 +1,81 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Remote calendar writing class.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#include "writer.h"
+#include <kdebug.h>
+
+/*=========================================================================
+| DEFINES
+ ========================================================================*/
+
+// Use caldav_modify_object() function.
+// If it's not set, a pair of caldav_delete_object/caldav_add_object
+// is used for modifying objects.
+// It's done, because, for some reason, SOGo server returns an error
+// on caldav_modify_object. DAViCAL works fine both ways.
+//#define USE_CALDAV_MODIFY
+
+/*=========================================================================
+| NAMESPACE
+ ========================================================================*/
+
+using namespace KCal;
+
+/*=========================================================================
+| METHODS
+ ========================================================================*/
+
+void CalDavWriter::cleanJob() {
+    CalDavJob::cleanJob();
+}
+
+int CalDavWriter::runJob(runtime_info* RT) {
+    kdDebug() << "writer::run, url: " << url() << "\n";
+
+    int res = OK;
+
+    kdDebug() << "pushing added objects";
+    res = pushObjects(mAdded, caldav_add_object, OK, RT);
+    if (OK == res) {
+#ifdef USE_CALDAV_MODIFY
+        kdDebug() << "pushing changed objects";
+        res = pushObjects(mChanged, caldav_modify_object, OK, RT);
+        if (OK == res) {
+            kdDebug() << "pushing deleted objects";
+            res = pushObjects(mDeleted, caldav_delete_object, OK, RT);
+        }
+#else // if USE_CALDAV_MODIFY
+        kdDebug() << "pushing changed objects (delete)";
+        res = pushObjects(mChanged, caldav_delete_object, OK, RT);
+        if (OK == res) {
+            kdDebug() << "pushing changed objects (add)";
+            res = pushObjects(mChanged, caldav_add_object, OK, RT);
+            if (OK == res) {
+                kdDebug() << "pushing deleted objects";
+                res = pushObjects(mDeleted, caldav_delete_object, OK, RT);
+            }
+        }
+#endif // if USE_CALDAV_MODIFY
+    }
+
+    if (OK != res) {
+        clearObjects();
+    }
+
+    return res;
+}
+
+// EOF ========================================================================
diff --git a/kresources/caldav/writer.h b/kresources/caldav/writer.h
new file mode 100644
index 00000000..841fc447
--- /dev/null
+++ b/kresources/caldav/writer.h
@@ -0,0 +1,110 @@
+/*=========================================================================
+| KCalDAV
+|--------------------------------------------------------------------------
+| (c) 2010  Timothy Pearson
+| (c) 2009  Kumaran Santhanam (initial KDE4 version)
+|
+| This project is released under the GNU General Public License.
+| Please see the file COPYING for more details.
+|--------------------------------------------------------------------------
+| Remote calendar writing class.
+ ========================================================================*/
+
+/*=========================================================================
+| INCLUDES
+ ========================================================================*/
+
+#ifndef KCALDAV_WRITER_H
+#define KCALDAV_WRITER_H
+
+#include "job.h"
+
+#include <string>
+#include <qstring.h>
+#include <qdatetime.h>
+
+namespace KCal {
+
+/*=========================================================================
+| CLASS
+ ========================================================================*/
+
+/**
+ * Calendar writer.
+ */
+class CalDavWriter : public CalDavJob {
+
+public:
+
+    /**
+     * @param url URL to load.
+     */
+    CalDavWriter(const QString& url = QString()) :
+        CalDavJob(url)
+    {
+        clearObjects();
+    }
+
+    /**
+     * Sets the information about added incidences writer should send to server.
+     * @param s icalendar-formatted string consists of all added incidences plus necessary calendar info.
+     * May be an empty string, which means there is no added incidences to send.
+     */
+    void setAddedObjects(const QString& s) {
+        mAdded = s;
+    }
+
+    /**
+     * Sets the information about changed incidences writer should send to server.
+     * @param s icalendar-formatted string consists of all changed incidences plus necessary calendar info.
+     * May be an empty string, which means there is no changed incidences to send.
+     */
+    void setChangedObjects(const QString& s) {
+        mChanged = s;
+    }
+
+    /**
+     * Sets the information about deleted incidences writer should send to server.
+     * @param s icalendar-formatted string consists of all deleted incidences plus necessary calendar info.
+     * May be an empty string, which means there is no deleted incidences to send.
+     */
+    void setDeletedObjects(const QString& s) {
+        mDeleted = s;
+    }
+
+    /**
+     * Clear all the information previously set.
+     */
+    void clearObjects() {
+        setAddedObjects("");
+        setChangedObjects("");
+        setDeletedObjects("");
+    }
+
+protected:
+
+    virtual int runJob(runtime_info* caldavRuntime);
+
+    virtual void cleanJob();
+
+    /// Just a wrapper above libcaldav functions.
+    template<typename Operation>
+    int pushObjects(const QString& data, Operation op, int okCode, runtime_info* RT) {
+        int r = okCode;
+        if (!data.isNull() && !data.isEmpty()) {
+            r = op(std::string(data.ascii()).c_str(), std::string(url().ascii()).c_str(), RT);
+        }
+        return r;
+    }
+
+private:
+
+    QString mAdded;
+    QString mChanged;
+    QString mDeleted;
+};
+
+} // namespace KCal
+
+#endif // KCALDAV_WRITER_H
+