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731 lines
22 KiB
731 lines
22 KiB
/*=========================================================================
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| KCalDAV
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|--------------------------------------------------------------------------
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| (c) 2010 Timothy Pearson
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| (c) 2009 Kumaran Santhanam (initial KDE4 version)
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|
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| This project is released under the GNU General Public License.
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| Please see the file COPYING for more details.
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|--------------------------------------------------------------------------
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| Main interface to the KResource system.
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========================================================================*/
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/*=========================================================================
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| INCLUDES
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========================================================================*/
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#include <string.h>
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#include <tqurl.h>
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#include <tqmessagebox.h>
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#include <tqapplication.h>
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#include <tqeventloop.h>
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#include <libkcal/calendarlocal.h>
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#include <libkcal/icalformat.h>
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#include <klocale.h>
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#include <kpassdlg.h>
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#include <tqdatetime.h>
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#include <tqmutex.h>
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#include <tqthread.h>
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#ifdef KCALDAV_DEBUG
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#include <tqfile.h>
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#endif
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#include "resource.h"
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#include "reader.h"
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#include "writer.h"
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/*=========================================================================
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| NAMESPACE
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========================================================================*/
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using namespace KCal;
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/*=========================================================================
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| CONSTANTS
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========================================================================*/
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const unsigned long ResourceCalDav::TERMINATION_WAITING_TIME = 3 * 1000; // 3 seconds
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const int ResourceCalDav::CACHE_DAYS = 90;
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const int ResourceCalDav::DEFAULT_RELOAD_INTERVAL = 10;
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const int ResourceCalDav::DEFAULT_SAVE_INTERVAL = 10;
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const int ResourceCalDav::DEFAULT_RELOAD_POLICY = ResourceCached::ReloadInterval;
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const int ResourceCalDav::DEFAULT_SAVE_POLICY = ResourceCached::SaveDelayed;
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/*=========================================================================
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| UTILITY
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========================================================================*/
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#define log(s) kdDebug() << identifier() << ": " << (s);
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/*=========================================================================
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| CONSTRUCTOR / DESTRUCTOR
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========================================================================*/
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ResourceCalDav::ResourceCalDav( const KConfig *config ) :
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ResourceCached(config)
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, readLockout(false)
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, mAllWritesComplete(false)
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, mLock(true)
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, mPrefs(NULL)
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, mLoader(NULL)
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, mWriter(NULL)
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, mProgress(NULL)
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, mLoadingQueueReady(true)
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, mWritingQueueReady(true)
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, mWriteRetryTimer(NULL)
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{
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log("ResourceCalDav(config)");
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init();
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if ( config ) {
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readConfig( config );
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}
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}
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ResourceCalDav::~ResourceCalDav() {
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log("jobs termination");
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if (mWriteRetryTimer != NULL) {
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mWriteRetryTimer->stop(); // Unfortunately we cannot do anything at this point; if this timer is still running something is seriously wrong
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}
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if (mLoader) {
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readLockout = true;
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mLoader->terminate();
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mLoader->wait(TERMINATION_WAITING_TIME);
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mLoadingQueueReady = true;
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}
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while ((mWriter->running() == true) || (mWritingQueue.isEmpty() == false) || !mWritingQueueReady) {
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readLockout = true;
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sleep(1);
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qApp->processEvents(TQEventLoop::ExcludeUserInput);
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}
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if (mWriter) {
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mWriter->terminate();
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}
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log("waiting for jobs terminated");
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if (mLoader) {
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mLoader->wait(TERMINATION_WAITING_TIME);
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}
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if (mWriter) {
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mWriter->wait(TERMINATION_WAITING_TIME);
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}
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log("deleting jobs");
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delete mLoader;
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delete mWriter;
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log("deleting preferences");
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delete mPrefs;
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}
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bool ResourceCalDav::isSaving() {
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doSave();
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return (((mWriteRetryTimer != NULL) ? 1 : 0) || (mWriter->running() == true) || (mWritingQueue.isEmpty() == false) || !mWritingQueueReady || readLockout);
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}
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/*=========================================================================
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| GENERAL METHODS
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========================================================================*/
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bool ResourceCalDav::doLoad() {
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bool syncCache = true;
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if ((mLoadingQueueReady == false) || (mLoadingQueue.isEmpty() == false) || (mLoader->running() == true) || (isSaving() == true)) {
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return true; // Silently fail; the user has obviously not responded to a dialog and we don't need to pop up more of them!
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}
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log(TQString("doLoad(%1)").arg(syncCache));
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clearCache();
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log("loading from cache");
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disableChangeNotification();
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loadCache();
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enableChangeNotification();
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clearChanges(); // TODO: Determine if this really needs to be here, as it might clear out the calendar prematurely causing user confusion while the download process is running
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emit resourceChanged(this);
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emit resourceLoaded(this);
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log("starting download job");
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startLoading(mPrefs->getFullUrl());
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return true;
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}
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bool ResourceCalDav::doSave() {
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bool syncCache = true;
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log(TQString("doSave(%1)").arg(syncCache));
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if (!hasChanges()) {
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log("no changes");
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return true;
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}
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log("saving cache");
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saveCache();
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// Delete any queued read jobs
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mLoadingQueue.clear();
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// See if there is a running read thread and terminate it
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if (mLoader->running() == true) {
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mLoader->terminate();
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mLoader->wait(TERMINATION_WAITING_TIME);
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mLoadingQueueReady = true;
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}
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log("start writing job");
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if (startWriting(mPrefs->getFullUrl()) == true) {
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log("clearing changes");
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// FIXME: Calling clearChanges() here is not the ideal way since the
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// upload might fail, but there is no other place to call it...
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clearChanges();
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if (mWriteRetryTimer != NULL) {
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if (mWriteRetryTimer->isActive() == false) {
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disconnect( mWriteRetryTimer, TQT_SIGNAL(timeout()), this, TQT_SLOT(doSave()) );
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delete mWriteRetryTimer;
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mWriteRetryTimer = NULL;
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}
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}
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return true;
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}
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else return true; // We do not need to alert the user to this transient failure; a timer has been started to retry the save
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}
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bool ResourceCalDav::doSave( bool syncCache, Incidence *incidence ) {
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// To suppress warning about doSave(bool) method hides ResourceCached::doSave(bool, Incidence)
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return ResourceCached::doSave();
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}
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KABC::Lock* ResourceCalDav::lock() {
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log("lock()");
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return &mLock;
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}
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void ResourceCalDav::readConfig( const KConfig *config ) {
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log("readConfig");
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mPrefs->readConfig();
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ResourceCached::readConfig(config);
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}
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void ResourceCalDav::writeConfig( KConfig *config ) {
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log("writeConfig()");
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ResourceCalendar::writeConfig(config);
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mPrefs->writeConfig();
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ResourceCached::writeConfig(config);
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}
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CalDavPrefs* ResourceCalDav::createPrefs() const {
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log("createPrefs()");
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CalDavPrefs* p = new CalDavPrefs(identifier());
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return p;
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}
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void ResourceCalDav::init() {
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// default settings
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setReloadInterval(DEFAULT_RELOAD_INTERVAL);
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setReloadPolicy(DEFAULT_RELOAD_POLICY);
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setSaveInterval(DEFAULT_SAVE_INTERVAL);
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setSavePolicy(DEFAULT_SAVE_POLICY);
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// creating preferences
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mPrefs = createPrefs();
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// creating reader/writer instances
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mLoader = new CalDavReader;
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mWriter = new CalDavWriter;
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// creating jobs
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// Qt4 handles this quite differently, as shown below,
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// whereas Qt3 needs events (see ::event())
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// connect(mLoader, TQT_SIGNAL(finished()), this, TQT_SLOT(loadFinished()));
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// connect(mWriter, TQT_SIGNAL(finished()), this, TQT_SLOT(writingFinished()));
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setType("ResourceCalDav");
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}
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void ResourceCalDav::setIncidencesReadOnly(Incidence::List& inc, bool readOnly) {
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Incidence::List::Iterator it;
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for ( it = inc.begin(); it != inc.end(); ++it ) {
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(*it)->setReadOnly( readOnly );
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}
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}
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void ResourceCalDav::ensureReadOnlyFlagHonored() {
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//disableChangeNotification();
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Incidence::List inc( rawIncidences() );
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setIncidencesReadOnly(inc, readOnly());
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//enableChangeNotification();
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emit resourceChanged(this);
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}
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void ResourceCalDav::setReadOnly(bool v) {
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KRES::Resource::setReadOnly(v);
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log("ensuring read only flag honored");
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ensureReadOnlyFlagHonored();
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}
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void ResourceCalDav::updateProgressBar(int direction) {
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int current_queued_events;
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static int original_queued_events;
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// See if anything is in the queues
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current_queued_events = mWritingQueue.count() + mLoadingQueue.count();
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if ((direction == 0) && (mLoader->running() == true)) current_queued_events++;
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if ((direction == 1) && (mWriter->running() == true)) current_queued_events++;
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if (current_queued_events > original_queued_events) {
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original_queued_events = current_queued_events;
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}
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if (current_queued_events == 0) {
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if ( mProgress != NULL) {
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mProgress->setComplete();
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mProgress = NULL;
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original_queued_events = 0;
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}
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}
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else {
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if (mProgress == NULL) {
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if (direction == 0) mProgress = KPIM::ProgressManager::createProgressItem(KPIM::ProgressManager::getUniqueID(), i18n("Downloading Calendar") );
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if (direction == 1) mProgress = KPIM::ProgressManager::createProgressItem(KPIM::ProgressManager::getUniqueID(), i18n("Uploading Calendar") );
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}
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mProgress->setProgress( ((((float)original_queued_events-(float)current_queued_events)*100)/(float)original_queued_events) );
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}
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}
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/*=========================================================================
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| READING METHODS
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========================================================================*/
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void ResourceCalDav::loadingQueuePush(const LoadingTask *task) {
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if ((mLoadingQueue.isEmpty() == true) && (mLoader->running() == false)) {
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mLoadingQueue.enqueue(task);
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updateProgressBar(0);
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loadingQueuePop();
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}
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}
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void ResourceCalDav::loadingQueuePop() {
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if (!mLoadingQueueReady || mLoadingQueue.isEmpty() || (isSaving() == true)) {
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return;
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}
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if (!mLoader) {
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log("loader == NULL");
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return;
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}
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// Loading queue and mLoadingQueueReady flag are not shared resources, i.e. only one thread has an access to them.
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// That's why no mutexes are required.
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LoadingTask *t = mLoadingQueue.head();
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mLoader->setUrl(t->url);
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mLoader->setParent(this);
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mLoader->setType(0);
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TQDateTime dt(TQDate::currentDate());
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mLoader->setRange(dt.addDays(-CACHE_DAYS), dt.addDays(CACHE_DAYS));
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//mLoader->setGetAll();
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mLoadingQueueReady = false;
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log("starting actual download job");
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mLoader->start(TQThread::LowestPriority);
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// if all ok, removing the task from the queue
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mLoadingQueue.dequeue();
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updateProgressBar(0);
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delete t;
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}
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void ResourceCalDav::startLoading(const TQString& url) {
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LoadingTask *t = new LoadingTask;
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t->url = url;
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loadingQueuePush(t);
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}
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void ResourceCalDav::loadFinished() {
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CalDavReader* loader = mLoader;
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log("load finished");
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if (!loader) {
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log("loader is NULL");
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return;
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}
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if (loader->error()) {
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if (loader->errorNumber() == -401) {
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if (NULL != mPrefs) {
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TQCString newpass;
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if (KPasswordDialog::getPassword (newpass, TQString("<b>") + i18n("Remote authorization required") + TQString("</b><p>") + i18n("Please input the password for") + TQString(" ") + mPrefs->getusername(), NULL) != 1) {
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log("load error: " + loader->errorString() );
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loadError(TQString("[%1] ").arg(abs(loader->errorNumber())) + loader->errorString());
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}
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else {
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// Set new password and try again
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mPrefs->setPassword(TQString(newpass));
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startLoading(mPrefs->getFullUrl());
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}
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}
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else {
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log("load error: " + loader->errorString() );
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loadError(TQString("[%1] ").arg(abs(loader->errorNumber())) + loader->errorString());
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}
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}
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else {
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log("load error: " + loader->errorString() );
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loadError(TQString("[%1] ").arg(abs(loader->errorNumber())) + loader->errorString());
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}
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} else {
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log("successful load");
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TQString data = loader->data();
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if (!data.isNull() && !data.isEmpty()) {
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// TODO: I don't know why, but some schedules on http://caldav-test.ioda.net/ (I used it for testing)
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// have some lines separated by single \r rather than \n or \r\n.
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// ICalFormat fails to parse that.
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data.replace("\r\n", "\n"); // to avoid \r\n becomes \n\n after the next line
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data.replace('\r', '\n');
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log("trying to parse...");
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if (parseData(data)) {
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// FIXME: The agenda view can crash when a change is
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// made on a remote server and a reload is requested!
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log("... parsing is ok");
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log("clearing changes");
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enableChangeNotification();
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clearChanges();
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emit resourceChanged(this);
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emit resourceLoaded(this);
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}
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}
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}
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// Loading queue and mLoadingQueueReady flag are not shared resources, i.e. only one thread has an access to them.
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// That's why no mutexes are required.
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mLoader->terminate();
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mLoader->wait(TERMINATION_WAITING_TIME);
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mLoadingQueueReady = true;
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updateProgressBar(0);
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loadingQueuePop();
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}
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bool ResourceCalDav::checkData(const TQString& data) {
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log("checking the data");
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ICalFormat ical;
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bool ret = true;
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if (!ical.fromString(&mCalendar, data)) {
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log("invalid ical string");
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ret = false;
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}
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return ret;
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}
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bool ResourceCalDav::parseData(const TQString& data) {
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log("parseData()");
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bool ret = true;
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// check if the data is OK
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// May be it's not efficient (parsing is done twice), but it should be safe
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if (!checkData(data)) {
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loadError(i18n("Parsing calendar data failed."));
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return false;
|
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}
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log("clearing cache");
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clearCache();
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disableChangeNotification();
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log("actually parsing the data");
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ICalFormat ical;
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if ( !ical.fromString( &mCalendar, data ) ) {
|
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// this should never happen, but...
|
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ret = false;
|
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}
|
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|
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// debug code here -------------------------------------------------------
|
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#ifdef KCALDAV_DEBUG
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const TQString fout_path = "/tmp/kcaldav_download_" + identifier() + ".tmp";
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|
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TQFile fout(fout_path);
|
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if (fout.open(IO_WriteOnly | IO_Append)) {
|
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TQTextStream sout(&fout);
|
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sout << "---------- " << resourceName() << ": --------------------------------\n";
|
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sout << data << "\n";
|
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fout.close();
|
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} else {
|
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loadError(i18n("can't open file"));
|
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}
|
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#endif // KCALDAV_DEBUG
|
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// end of debug code ----------------------------------------------------
|
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|
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enableChangeNotification();
|
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|
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if (ret) {
|
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log("parsing is ok");
|
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//if ( !noReadOnlyOnLoad() && readOnly() ) {
|
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if ( readOnly() ) {
|
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log("ensuring read only flag honored");
|
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ensureReadOnlyFlagHonored();
|
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}
|
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log("saving to cache");
|
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saveCache();
|
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}
|
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|
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return ret;
|
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}
|
|
|
|
/*=========================================================================
|
|
| WRITING METHODS
|
|
========================================================================*/
|
|
|
|
TQString ResourceCalDav::getICalString(const Incidence::List& inc) {
|
|
if (inc.isEmpty()) {
|
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return "";
|
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}
|
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|
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CalendarLocal loc(timeZoneId());
|
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TQString data = "";
|
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ICalFormat ical;
|
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|
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// NOTE: This is very susceptible to invalid entries in added/changed/deletedIncidences
|
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// 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) {
|
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Incidence *i = (*it)->clone();
|
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loc.addIncidence(i);
|
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}
|
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|
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data = ical.toString(&loc);
|
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|
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return data;
|
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}
|
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|
|
void ResourceCalDav::writingQueuePush(const WritingTask *task) {
|
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// printf("task->added: %s\n\r", task->added.ascii());
|
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// printf("task->deleted: %s\n\r", task->deleted.ascii());
|
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// printf("task->changed: %s\n\r", task->changed.ascii());
|
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mWritingQueue.enqueue(task);
|
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updateProgressBar(1);
|
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writingQueuePop();
|
|
}
|
|
|
|
void ResourceCalDav::writingQueuePop() {
|
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if (!mWritingQueueReady || mWritingQueue.isEmpty()) {
|
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return;
|
|
}
|
|
|
|
if (!mWriter) {
|
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log("writer == NULL");
|
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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();
|
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|
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log("writingQueuePop: url = " + t->url);
|
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|
|
mWriter->setUrl(t->url);
|
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mWriter->setParent(this);
|
|
mWriter->setType(1);
|
|
|
|
#ifdef KCALDAV_DEBUG
|
|
const TQString fout_path = "/tmp/kcaldav_upload_" + identifier() + ".tmp";
|
|
|
|
TQFile fout(fout_path);
|
|
if (fout.open(IO_WriteOnly | IO_Append)) {
|
|
TQTextStream 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(TQThread::LowestPriority);
|
|
|
|
// if all ok, remove the task from the queue
|
|
mWritingQueue.dequeue();
|
|
updateProgressBar(1);
|
|
|
|
delete t;
|
|
}
|
|
|
|
bool ResourceCalDav::event ( TQEvent * e ) {
|
|
if (e->type() == 1000) {
|
|
// Read done
|
|
loadFinished();
|
|
return TRUE;
|
|
}
|
|
else if (e->type() == 1001) {
|
|
// Write done
|
|
writingFinished();
|
|
return TRUE;
|
|
}
|
|
else return FALSE;
|
|
}
|
|
|
|
void ResourceCalDav::releaseReadLockout() {
|
|
readLockout = false;
|
|
}
|
|
|
|
bool ResourceCalDav::startWriting(const TQString& url) {
|
|
log("startWriting: url = " + url);
|
|
|
|
// WARNING: This will segfault if a separate read or write thread
|
|
// modifies the calendar with clearChanges() or similar
|
|
// Before these calls are made any existing read (and maybe write) threads should be finished
|
|
if ((mLoader->running() == true) || (mLoadingQueue.isEmpty() == false) || (mWriter->running() == true) || (mWritingQueue.isEmpty() == false)) {
|
|
if (mWriteRetryTimer == NULL) {
|
|
mWriteRetryTimer = new TQTimer(this);
|
|
connect( mWriteRetryTimer, TQT_SIGNAL(timeout()), TQT_SLOT(doSave()) );
|
|
}
|
|
mWriteRetryTimer->start(1000, TRUE);
|
|
return false;
|
|
}
|
|
|
|
// If we don't lock the read out for a few seconds, it would be possible for the old calendar to be
|
|
// downloaded before our changes are committed, presenting a very bad image to the user as his/her appointments
|
|
// revert to the state they were in before the write (albiet temporarily)
|
|
readLockout = true;
|
|
|
|
// This needs to send each event separately; i.e. if two events were added they need
|
|
// to be extracted and pushed on the stack independently (using two calls to writingQueuePush())
|
|
|
|
Incidence::List added = addedIncidences();
|
|
Incidence::List changed = changedIncidences();
|
|
Incidence::List deleted = deletedIncidences();
|
|
|
|
Incidence::List::ConstIterator it;
|
|
Incidence::List currentIncidence;
|
|
|
|
for( it = added.begin(); it != added.end(); ++it ) {
|
|
WritingTask *t = new WritingTask;
|
|
|
|
currentIncidence.clear();
|
|
currentIncidence.append(*it);
|
|
|
|
t->url = url;
|
|
t->added = getICalString(currentIncidence);
|
|
t->changed = "";
|
|
t->deleted = "";
|
|
|
|
writingQueuePush(t);
|
|
}
|
|
|
|
for( it = changed.begin(); it != changed.end(); ++it ) {
|
|
WritingTask *t = new WritingTask;
|
|
|
|
currentIncidence.clear();
|
|
currentIncidence.append(*it);
|
|
|
|
t->url = url;
|
|
t->added = "";
|
|
t->changed = getICalString(currentIncidence);
|
|
t->deleted = "";
|
|
|
|
writingQueuePush(t);
|
|
}
|
|
|
|
for( it = deleted.begin(); it != deleted.end(); ++it ) {
|
|
WritingTask *t = new WritingTask;
|
|
|
|
currentIncidence.clear();
|
|
currentIncidence.append(*it);
|
|
|
|
t->url = url;
|
|
t->added = "";
|
|
t->changed = "";
|
|
t->deleted = getICalString(currentIncidence);
|
|
|
|
writingQueuePush(t);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void ResourceCalDav::writingFinished() {
|
|
log("writing finished");
|
|
|
|
if (!mWriter) {
|
|
log("mWriter is NULL");
|
|
return;
|
|
}
|
|
|
|
if (mWriter->error() && (abs(mWriter->errorNumber()) != 207)) {
|
|
if (mWriter->errorNumber() == -401) {
|
|
if (NULL != mPrefs) {
|
|
TQCString newpass;
|
|
if (KPasswordDialog::getPassword (newpass, TQString("<b>") + i18n("Remote authorization required") + TQString("</b><p>") + i18n("Please input the password for") + TQString(" ") + mPrefs->getusername(), NULL) != 1) {
|
|
log("write error: " + mWriter->errorString());
|
|
saveError(TQString("[%1] ").arg(abs(mWriter->errorNumber())) + mWriter->errorString());
|
|
}
|
|
else {
|
|
// Set new password and try again
|
|
mPrefs->setPassword(TQString(newpass));
|
|
startWriting(mPrefs->getFullUrl());
|
|
}
|
|
}
|
|
else {
|
|
log("write error: " + mWriter->errorString());
|
|
saveError(TQString("[%1] ").arg(abs(mWriter->errorNumber())) + mWriter->errorString());
|
|
}
|
|
}
|
|
else {
|
|
log("write error: " + mWriter->errorString());
|
|
saveError(TQString("[%1] ").arg(abs(mWriter->errorNumber())) + mWriter->errorString());
|
|
}
|
|
} else {
|
|
log("success");
|
|
// is there something to do here?
|
|
}
|
|
|
|
// Give the remote system a few seconds to process the data before we allow any read operations
|
|
TQTimer::singleShot( 3000, this, TQT_SLOT(releaseReadLockout()) );
|
|
|
|
// 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.
|
|
mWriter->terminate();
|
|
mWriter->wait(TERMINATION_WAITING_TIME);
|
|
mWritingQueueReady = true;
|
|
updateProgressBar(1);
|
|
writingQueuePop();
|
|
}
|
|
|
|
// EOF ========================================================================
|