QGCTileCacheWorker.cpp 27.2 KB
Newer Older
1 2 3 4 5 6 7 8
/****************************************************************************
 *
 *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
 *
 * QGroundControl is licensed according to the terms in the file
 * COPYING.md in the root of the source code directory.
 *
 ****************************************************************************/
dogmaphobic's avatar
dogmaphobic committed
9 10 11 12 13 14 15 16 17 18


/**
 * @file
 *   @brief Map Tile Cache Worker Thread
 *
 *   @author Gus Grubba <mavlink@grubba.com>
 *
 */

dogmaphobic's avatar
dogmaphobic committed
19 20 21
#include "QGCMapEngine.h"
#include "QGCMapTileSet.h"

dogmaphobic's avatar
dogmaphobic committed
22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304
#include <QVariant>
#include <QtSql/QSqlQuery>
#include <QSqlError>
#include <QDebug>
#include <QDateTime>
#include <QApplication>
#include <QFile>

#include "time.h"

const char* kDefaultSet = "Default Tile Set";
const QString kSession  = QLatin1String("QGeoTileWorkerSession");

QGC_LOGGING_CATEGORY(QGCTileCacheLog, "QGCTileCacheLog")

//-- Update intervals

#define LONG_TIMEOUT        5
#define SHORT_TIMEOUT       2

//-----------------------------------------------------------------------------
QGCCacheWorker::QGCCacheWorker()
    : _db(NULL)
    , _valid(false)
    , _failed(false)
    , _defaultSet(UINT64_MAX)
    , _totalSize(0)
    , _totalCount(0)
    , _defaultSize(0)
    , _defaultCount(0)
    , _lastUpdate(0)
    , _updateTimeout(SHORT_TIMEOUT)
{

}

//-----------------------------------------------------------------------------
QGCCacheWorker::~QGCCacheWorker()
{

}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::setDatabaseFile(const QString& path)
{
    _databasePath = path;
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::quit()
{
    _mutex.lock();
    while(_taskQueue.count()) {
        QGCMapTask* task = _taskQueue.dequeue();
        delete task;
    }
    _mutex.unlock();
    if(this->isRunning()) {
        _waitc.wakeAll();
    }
}

//-----------------------------------------------------------------------------
bool
QGCCacheWorker::enqueueTask(QGCMapTask* task)
{
    //-- If not initialized, the only allowed task is Init
    if(!_valid && task->type() != QGCMapTask::taskInit) {
        task->setError("Database Not Initialized");
        task->deleteLater();
        return false;
    }
    if(!_taskQueue.contains(task))
    {
        _mutex.lock();
        _taskQueue.enqueue(task);
        _mutex.unlock();
        if(this->isRunning()) {
            _waitc.wakeAll();
        } else {
            this->start(QThread::NormalPriority);
        }
        return true;
    }
    //-- Should never happen
    return false;
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::run()
{
    if(!_valid && !_failed) {
        _init();
    }
    if(_valid) {
        _db = new QSqlDatabase(QSqlDatabase::addDatabase("QSQLITE", kSession));
        _db->setDatabaseName(_databasePath);
        _db->setConnectOptions("QSQLITE_ENABLE_SHARED_CACHE");
        _valid = _db->open();
    }
    while(true) {
        QGCMapTask* task;
        if(_taskQueue.count()) {
            _mutex.lock();
            task = _taskQueue.dequeue();
            _mutex.unlock();
            switch(task->type()) {
                case QGCMapTask::taskInit:
                    break;
                case QGCMapTask::taskCacheTile:
                    _saveTile(task);
                    break;
                case QGCMapTask::taskFetchTile:
                    _getTile(task);
                    break;
                case QGCMapTask::taskFetchTileSets:
                    _getTileSets(task);
                    break;
                case QGCMapTask::taskCreateTileSet:
                    _createTileSet(task);
                    break;
                case QGCMapTask::taskGetTileDownloadList:
                    _getTileDownloadList(task);
                    break;
                case QGCMapTask::taskUpdateTileDownloadState:
                    _updateTileDownloadState(task);
                    break;
                case QGCMapTask::taskDeleteTileSet:
                    _deleteTileSet(task);
                    break;
                case QGCMapTask::taskPruneCache:
                    _pruneCache(task);
                    break;
                case QGCMapTask::taskReset:
                    _resetCacheDatabase(task);
                    break;
            }
            task->deleteLater();
            //-- Check for update timeout
            size_t count = _taskQueue.count();
            if(count > 100) {
                _updateTimeout = LONG_TIMEOUT;
            } else if(count < 25) {
                _updateTimeout = SHORT_TIMEOUT;
            }
            if(!count || (time(0) - _lastUpdate > _updateTimeout)) {
                _updateTotals();
            }
        } else {
            //-- Wait a bit before shutting things down
            _waitmutex.lock();
            int timeout = 5000;
            if(!_waitc.wait(&_waitmutex, timeout))
            {
                _waitmutex.unlock();
                _mutex.lock();
                //-- If nothing to do, close db and leave thread
                if(!_taskQueue.count()) {
                    _mutex.unlock();
                    break;
                }
                _mutex.unlock();
            }
            _waitmutex.unlock();
        }
    }
    if(_db) {
        delete _db;
        _db = NULL;
        QSqlDatabase::removeDatabase(kSession);
    }
}
//-----------------------------------------------------------------------------
bool
QGCCacheWorker::_findTileSetID(const QString name, quint64& setID)
{
    QSqlQuery query(*_db);
    QString s = QString("SELECT setID FROM TileSets WHERE name = \"%1\"").arg(name);
    if(query.exec(s)) {
        if(query.next()) {
            setID = query.value(0).toULongLong();
            return true;
        }
    }
    return false;
}

//-----------------------------------------------------------------------------
quint64
QGCCacheWorker::_getDefaultTileSet()
{
    if(_defaultSet != UINT64_MAX)
        return _defaultSet;
    QSqlQuery query(*_db);
    QString s = QString("SELECT setID FROM TileSets WHERE defaultSet = 1");
    if(query.exec(s)) {
        if(query.next()) {
            _defaultSet = query.value(0).toULongLong();
            return _defaultSet;
        }
    }
    return 1L;
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_saveTile(QGCMapTask *mtask)
{
    if(_valid) {
        QGCSaveTileTask* task = static_cast<QGCSaveTileTask*>(mtask);
        QSqlQuery query(*_db);
        query.prepare("INSERT INTO Tiles(hash, format, tile, size, type, date) VALUES(?, ?, ?, ?, ?, ?)");
        query.addBindValue(task->tile()->hash());
        query.addBindValue(task->tile()->format());
        query.addBindValue(task->tile()->img());
        query.addBindValue(task->tile()->img().size());
        query.addBindValue(task->tile()->type());
        query.addBindValue(QDateTime::currentDateTime().toTime_t());
        if(query.exec()) {
            quint64 tileID = query.lastInsertId().toULongLong();
            quint64 setID = task->tile()->set() == UINT64_MAX ? _getDefaultTileSet() : task->tile()->set();
            QString s = QString("INSERT INTO SetTiles(tileID, setID) VALUES(%1, %2)").arg(tileID).arg(setID);
            query.prepare(s);
            if(!query.exec()) {
                qWarning() << "Map Cache SQL error (add tile into SetTiles):" << query.lastError().text();
            }
            qCDebug(QGCTileCacheLog) << "_saveTile() HASH:" << task->tile()->hash();
        } else {
            //-- Tile was already there.
            //   QtLocation some times requests the same tile twice in a row. The first is saved, the second is already there.
        }
    } else {
        qWarning() << "Map Cache SQL error (saveTile() open db):" << _db->lastError();
    }
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_getTile(QGCMapTask* mtask)
{
    if(!_valid) {
        mtask->setError("No Cache Database");
        return;
    }
    bool found = false;
    QGCFetchTileTask* task = static_cast<QGCFetchTileTask*>(mtask);
    QSqlQuery query(*_db);
    QString s = QString("SELECT tile, format, type FROM Tiles WHERE hash = \"%1\"").arg(task->hash());
    if(query.exec(s)) {
        if(query.next()) {
            QByteArray ar   = query.value(0).toByteArray();
            QString format  = query.value(1).toString();
            UrlFactory::MapType type = (UrlFactory::MapType)query.value(2).toInt();
            qCDebug(QGCTileCacheLog) << "_getTile() (Found in DB) HASH:" << task->hash();
            QGCCacheTile* tile = new QGCCacheTile(task->hash(), ar, format, type);
            task->setTileFetched(tile);
            found = true;
        }
    }
    if(!found) {
        qCDebug(QGCTileCacheLog) << "_getTile() (NOT in DB) HASH:" << task->hash();
        task->setError("Tile not in cache database");
    }
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_getTileSets(QGCMapTask* mtask)
{
    if(!_valid) {
        mtask->setError("No Cache Database");
        return;
    }
    QGCFetchTileSetTask* task = static_cast<QGCFetchTileSetTask*>(mtask);
    QSqlQuery query(*_db);
    QString s = QString("SELECT * FROM TileSets ORDER BY defaultSet DESC, name ASC");
    if(query.exec(s)) {
        while(query.next()) {
            QString name = query.value("name").toString();
            QString desc = query.value("description").toString();
305 306 307
            //-- Original database had description as NOT NULL
            if(desc.isEmpty())
                desc = " ";
dogmaphobic's avatar
dogmaphobic committed
308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345
            QGCCachedTileSet* set = new QGCCachedTileSet(name, desc);
            set->setId(query.value("setID").toULongLong());
            set->setMapTypeStr(query.value("typeStr").toString());
            set->setTopleftLat(query.value("topleftLat").toDouble());
            set->setTopleftLon(query.value("topleftLon").toDouble());
            set->setBottomRightLat(query.value("bottomRightLat").toDouble());
            set->setBottomRightLon(query.value("bottomRightLon").toDouble());
            set->setMinZoom(query.value("minZoom").toInt());
            set->setMaxZoom(query.value("maxZoom").toInt());
            set->setType((UrlFactory::MapType)query.value("type").toInt());
            set->setNumTiles(query.value("numTiles").toUInt());
            set->setTilesSize(query.value("tilesSize").toULongLong());
            set->setDefaultSet(query.value("defaultSet").toInt() != 0);
            set->setCreationDate(QDateTime::fromTime_t(query.value("date").toUInt()));
            //-- Load thumbnail (if not default set)
            if(!set->defaultSet()) {
                int w = query.value("thumbW").toInt();
                int h = query.value("thumbH").toInt();
                if(w && h) {
                    QByteArray ba = query.value("thumbNail").toByteArray();
                    set->setThumbNail(QImage((uchar*)(void*)ba.data(), w, h, QImage::Format_RGB32));
                }
            }
            _updateSetTotals(set);
            //-- Object created here must be moved to app thread to be used there
            set->moveToThread(QApplication::instance()->thread());
            task->tileSetFetched(set);
        }
    } else {
        task->setError("No tile set in database");
    }
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_updateSetTotals(QGCCachedTileSet* set)
{
    if(set->defaultSet()) {
346
        _updateTotals();
dogmaphobic's avatar
dogmaphobic committed
347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414
        set->setSavedTiles(_totalCount);
        set->setSavedSize(_totalSize);
        set->setNumTiles(_defaultCount);
        set->setTilesSize(_defaultSize);
        return;
    }
    QSqlQuery subquery(*_db);
    QString sq = QString("SELECT COUNT(size), SUM(size) FROM Tiles A INNER JOIN SetTiles B on A.tileID = B.tileID WHERE B.setID = %1").arg(set->id());
    if(subquery.exec(sq)) {
        if(subquery.next()) {
            set->setSavedTiles(subquery.value(0).toUInt());
            set->setSavedSize(subquery.value(1).toULongLong());
            //-- Update estimated size
            if(set->savedTiles() > 10 && set->savedSize()) {
                quint32 avg = set->savedSize() / set->savedTiles();
                set->setTilesSize(avg * set->numTiles());
            }
        }
    }
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_updateTotals()
{
    QSqlQuery query(*_db);
    QString s;
    s = QString("SELECT COUNT(size), SUM(size) FROM Tiles");
    if(query.exec(s)) {
        if(query.next()) {
            _totalCount = query.value(0).toUInt();
            _totalSize  = query.value(1).toULongLong();
        }
    }
    s = QString("SELECT COUNT(size), SUM(size) FROM Tiles A INNER JOIN SetTiles B on A.tileID = B.tileID WHERE B.setID = %1").arg(_getDefaultTileSet());
    if(query.exec(s)) {
        if(query.next()) {
            _defaultCount = query.value(0).toUInt();
            _defaultSize  = query.value(1).toULongLong();
        }
    }
    emit updateTotals(_totalCount, _totalSize, _defaultCount, _defaultSize);
    _lastUpdate = time(0);
}

//-----------------------------------------------------------------------------
bool
QGCCacheWorker::_findTile(const QString hash)
{
    QSqlQuery query(*_db);
    QString s = QString("SELECT type FROM Tiles WHERE hash = \"%1\"").arg(hash);
    if(query.exec(s)) {
        if(query.next()) {
            return true;
        }
    }
    return false;
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_createTileSet(QGCMapTask *mtask)
{
    if(_valid) {
        //-- Create Tile Set
        quint32 actual_count = 0;
        QGCCreateTileSetTask* task = static_cast<QGCCreateTileSetTask*>(mtask);
        QSqlQuery query(*_db);
415 416 417 418
        QString desc = task->tileSet()->description();
        //-- Original database had description as NOT NULL
        if(desc.isEmpty())
            desc = " ";
dogmaphobic's avatar
dogmaphobic committed
419 420 421 422
        query.prepare("INSERT INTO TileSets("
            "name, description, typeStr, topleftLat, topleftLon, bottomRightLat, bottomRightLon, minZoom, maxZoom, type, numTiles, tilesSize, thumbNail, thumbW, thumbH, date"
            ") VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
        query.addBindValue(task->tileSet()->name());
423
        query.addBindValue(desc);
dogmaphobic's avatar
dogmaphobic committed
424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674
        query.addBindValue(task->tileSet()->mapTypeStr());
        query.addBindValue(task->tileSet()->topleftLat());
        query.addBindValue(task->tileSet()->topleftLon());
        query.addBindValue(task->tileSet()->bottomRightLat());
        query.addBindValue(task->tileSet()->bottomRightLon());
        query.addBindValue(task->tileSet()->minZoom());
        query.addBindValue(task->tileSet()->maxZoom());
        query.addBindValue(task->tileSet()->type());
        query.addBindValue(task->tileSet()->numTiles());
        query.addBindValue(task->tileSet()->tilesSize());
        if(task->tileSet()->thumbNail().isNull()) {
            query.addBindValue(QByteArray(1,'\0'));
            query.addBindValue(0);
            query.addBindValue(0);
        } else {
            query.addBindValue(QByteArray((const char *)(void*)task->tileSet()->thumbNail().convertToFormat(QImage::Format_RGB32).bits(), task->tileSet()->thumbNail().byteCount()));
            query.addBindValue(task->tileSet()->thumbNail().width());
            query.addBindValue(task->tileSet()->thumbNail().height());
        }
        query.addBindValue(QDateTime::currentDateTime().toTime_t());
        if(!query.exec()) {
            qWarning() << "Map Cache SQL error (add tileSet into TileSets):" << query.lastError().text();
        } else {
            //-- Get just creted (auto-incremented) setID
            quint64 setID = query.lastInsertId().toULongLong();
            task->tileSet()->setId(setID);
            //-- Prepare Download List
            for(int z = task->tileSet()->minZoom(); z <= task->tileSet()->maxZoom(); z++) {
                QGCTileSet set = QGCMapEngine::getTileCount(z,
                    task->tileSet()->topleftLon(), task->tileSet()->topleftLat(),
                    task->tileSet()->bottomRightLon(), task->tileSet()->bottomRightLat(), task->tileSet()->type());
                UrlFactory::MapType type = task->tileSet()->type();
                for(int x = set.tileX0; x <= set.tileX1; x++) {
                    for(int y = set.tileY0; y <= set.tileY1; y++) {
                        //-- See if tile is already downloaded
                        QString hash = QGCMapEngine::getTileHash(type, x, y, z);
                        if(!_findTile(hash)) {
                            //-- Set to download
                            query.prepare("INSERT OR IGNORE INTO TilesDownload(setID, hash, type, x, y, z, state) VALUES(?, ?, ?, ?, ? ,? ,?)");
                            query.addBindValue(setID);
                            query.addBindValue(hash);
                            query.addBindValue(type);
                            query.addBindValue(x);
                            query.addBindValue(y);
                            query.addBindValue(z);
                            query.addBindValue(0);
                            if(!query.exec()) {
                                qWarning() << "Map Cache SQL error (add tile into TilesDownload):" << query.lastError().text();
                                mtask->setError("Error creating tile set download list");
                                return;
                            } else
                                actual_count++;
                        }
                    }
                }
            }
            //-- Now update how many tiles we actually have to download
            quint64 actual_size = actual_count * UrlFactory::averageSizeForType(task->tileSet()->type());
            QString s = QString("UPDATE TileSets SET numTiles = %1, tilesSize = %2 WHERE setID = %3").arg(actual_count).arg(actual_size).arg(task->tileSet()->setID());
            if(!query.exec(s)) {
                qWarning() << "Map Cache SQL error (set TilesDownload state):" << query.lastError().text();
            }
            //-- Done
            _updateSetTotals(task->tileSet());
            task->setTileSetSaved();
            return;
        }
    }
    mtask->setError("Error saving tile set");
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_getTileDownloadList(QGCMapTask* mtask)
{
    if(!_valid) {
        mtask->setError("No Cache Database");
        return;
    }
    QList<QGCTile*> tiles;
    QGCGetTileDownloadListTask* task = static_cast<QGCGetTileDownloadListTask*>(mtask);
    QSqlQuery query(*_db);
    QString s = QString("SELECT hash, type, x, y, z FROM TilesDownload WHERE setID = %1 AND state = 0 LIMIT %2").arg(task->setID()).arg(task->count());
    if(query.exec(s)) {
        while(query.next()) {
            QGCTile* tile = new QGCTile;
            tile->setHash(query.value("hash").toString());
            tile->setType((UrlFactory::MapType)query.value("type").toInt());
            tile->setX(query.value("x").toInt());
            tile->setY(query.value("y").toInt());
            tile->setZ(query.value("z").toInt());
            tiles.append(tile);
        }
        for(int i = 0; i < tiles.size(); i++) {
            s = QString("UPDATE TilesDownload SET state = %1 WHERE setID = %2 and hash = \"%3\"").arg((int)QGCTile::StateDownloading).arg(task->setID()).arg(tiles[i]->hash());
            if(!query.exec(s)) {
                qWarning() << "Map Cache SQL error (set TilesDownload state):" << query.lastError().text();
            }
        }
    }
    task->setTileListFetched(tiles);
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_updateTileDownloadState(QGCMapTask* mtask)
{
    if(!_valid) {
        mtask->setError("No Cache Database");
        return;
    }
    QGCUpdateTileDownloadStateTask* task = static_cast<QGCUpdateTileDownloadStateTask*>(mtask);
    QSqlQuery query(*_db);
    QString s;
    if(task->state() == QGCTile::StateComplete) {
        s = QString("DELETE FROM TilesDownload WHERE setID = %1 AND hash = \"%2\"").arg(task->setID()).arg(task->hash());
    } else {
        if(task->hash() == "*") {
            s = QString("UPDATE TilesDownload SET state = %1 WHERE setID = %2").arg((int)task->state()).arg(task->setID());
        } else {
            s = QString("UPDATE TilesDownload SET state = %1 WHERE setID = %2 AND hash = \"%3\"").arg((int)task->state()).arg(task->setID()).arg(task->hash());
        }
    }
    if(!query.exec(s)) {
        qWarning() << "QGCCacheWorker::_updateTileDownloadState() Error:" << query.lastError().text();
    }
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_pruneCache(QGCMapTask* mtask)
{
    if(!_valid) {
        mtask->setError("No Cache Database");
        return;
    }
    QGCPruneCacheTask* task = static_cast<QGCPruneCacheTask*>(mtask);
    QSqlQuery query(*_db);
    QString s;
    s = QString("SELECT tileID, size, hash FROM Tiles WHERE tileID IN (SELECT tileID FROM SetTiles WHERE setID = %1) ORDER BY DATE ASC LIMIT 128").arg(_getDefaultTileSet());
    qint64 amount = (qint64)task->amount();
    QList<quint64> tlist;
    if(query.exec(s)) {
        while(query.next() && amount >= 0) {
            tlist << query.value(0).toULongLong();
            amount -= query.value(1).toULongLong();
            qCDebug(QGCTileCacheLog) << "_pruneCache() HASH:" << query.value(2).toString();
        }
        while(tlist.count()) {
            s = QString("DELETE FROM Tiles WHERE tileID = %1").arg(tlist[0]);
            tlist.removeFirst();
            if(!query.exec(s))
                break;
        }
        task->setPruned();
    }
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_deleteTileSet(QGCMapTask* mtask)
{
    if(!_valid) {
        mtask->setError("No Cache Database");
        return;
    }
    QGCDeleteTileSetTask* task = static_cast<QGCDeleteTileSetTask*>(mtask);
    QSqlQuery query(*_db);
    QString s;
    s = QString("DELETE FROM Tiles WHERE tileID IN (SELECT tileID FROM SetTiles WHERE setID = %1)").arg(task->setID());
    query.exec(s);
    s = QString("DELETE FROM TilesDownload WHERE setID = %1").arg(task->setID());
    query.exec(s);
    s = QString("DELETE FROM TileSets WHERE setID = %1").arg(task->setID());
    query.exec(s);
    s = QString("DELETE FROM SetTiles WHERE setID = %1").arg(task->setID());
    query.exec(s);
    _updateTotals();
    task->setTileSetDeleted();
}
//-----------------------------------------------------------------------------
void
QGCCacheWorker::_resetCacheDatabase(QGCMapTask* mtask)
{
    if(!_valid) {
        mtask->setError("No Cache Database");
        return;
    }
    QGCResetTask* task = static_cast<QGCResetTask*>(mtask);
    QSqlQuery query(*_db);
    QString s;
    s = QString("DROP TABLE Tiles");
    query.exec(s);
    s = QString("DROP TABLE TileSets");
    query.exec(s);
    s = QString("DROP TABLE SetTiles");
    query.exec(s);
    s = QString("DROP TABLE TilesDownload");
    query.exec(s);
    _createDB();
    task->setResetCompleted();
}

//-----------------------------------------------------------------------------
bool
QGCCacheWorker::_init()
{
    _failed = false;
    if(!_databasePath.isEmpty()) {
        qCDebug(QGCTileCacheLog) << "Mapping cache directory:" << _databasePath;
        //-- Initialize Database
        _db = new QSqlDatabase(QSqlDatabase::addDatabase("QSQLITE", kSession));
        _db->setDatabaseName(_databasePath);
        _db->setConnectOptions("QSQLITE_ENABLE_SHARED_CACHE");
        if (_db->open()) {
            _createDB();
        } else {
            qCritical() << "Map Cache SQL error (init() open db):" << _db->lastError();
            _failed = true;
        }
        delete _db;
        _db = NULL;
        QSqlDatabase::removeDatabase(kSession);
    } else {
        qCritical() << "Could not find suitable cache directory.";
        _failed = true;
    }
    return _failed;
}

//-----------------------------------------------------------------------------
void
QGCCacheWorker::_createDB()
{
    QSqlQuery query(*_db);
    if(!query.exec(
        "CREATE TABLE IF NOT EXISTS Tiles ("
        "tileID INTEGER PRIMARY KEY NOT NULL, "
        "hash TEXT NOT NULL UNIQUE, "
        "format TEXT NOT NULL, "
        "tile BLOB NULL, "
        "size INTEGER, "
        "type INTEGER, "
        "date INTEGER DEFAULT 0)"))
    {
        qWarning() << "Map Cache SQL error (create Tiles db):" << query.lastError().text();
    } else {
        if(!query.exec(
            "CREATE TABLE IF NOT EXISTS TileSets ("
            "setID INTEGER PRIMARY KEY NOT NULL, "
            "name TEXT NOT NULL UNIQUE, "
675
            "description TEXT, "
dogmaphobic's avatar
dogmaphobic committed
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743
            "typeStr TEXT, "
            "topleftLat REAL DEFAULT 0.0, "
            "topleftLon REAL DEFAULT 0.0, "
            "bottomRightLat REAL DEFAULT 0.0, "
            "bottomRightLon REAL DEFAULT 0.0, "
            "minZoom INTEGER DEFAULT 3, "
            "maxZoom INTEGER DEFAULT 3, "
            "type INTEGER DEFAULT -1, "
            "numTiles INTEGER DEFAULT 0, "
            "tilesSize INTEGER DEFAULT 0, "
            "defaultSet INTEGER DEFAULT 0, "
            "thumbNail BLOB NULL, "
            "thumbW INTEGER DEFAULT 0, "
            "thumbH INTEGER DEFAULT 0, "
            "date INTEGER DEFAULT 0)"))
        {
            qWarning() << "Map Cache SQL error (create TileSets db):" << query.lastError().text();
        } else {
            if(!query.exec(
                "CREATE TABLE IF NOT EXISTS SetTiles ("
                "setID INTEGER, "
                "tileID INTEGER)"))
            {
                qWarning() << "Map Cache SQL error (create SetTiles db):" << query.lastError().text();
            } else {
                if(!query.exec(
                    "CREATE TABLE IF NOT EXISTS TilesDownload ("
                    "setID INTEGER, "
                    "hash TEXT NOT NULL UNIQUE, "
                    "type INTEGER, "
                    "x INTEGER, "
                    "y INTEGER, "
                    "z INTEGER, "
                    "state INTEGER DEFAULT 0)"))
                {
                    qWarning() << "Map Cache SQL error (create TilesDownload db):" << query.lastError().text();
                } else {
                    //-- Database it ready for use
                    _valid = true;
                }
            }
        }
    }
    //-- Create default tile set
    if(_valid) {
        QString s = QString("SELECT name FROM TileSets WHERE name = \"%1\"").arg(kDefaultSet);
        if(query.exec(s)) {
            if(!query.next()) {
                query.prepare("INSERT INTO TileSets(name, description, defaultSet, date) VALUES(?, ?, ?, ?)");
                query.addBindValue(kDefaultSet);
                query.addBindValue("System wide tile cache");
                query.addBindValue(1);
                query.addBindValue(QDateTime::currentDateTime().toTime_t());
                if(!query.exec()) {
                    qWarning() << "Map Cache SQL error (Creating default tile set):" << _db->lastError();
                    _valid = false;
                }
            }
        } else {
            qWarning() << "Map Cache SQL error (Looking for default tile set):" << _db->lastError();
        }
    }
    if(!_valid) {
        QFile file(_databasePath);
        file.remove();
    }
    _failed = !_valid;
}