source: src/sql/sqlengine.cpp @ 79a7671

qt5
Last change on this file since 79a7671 was 79a7671, checked in by gregor herrmann <gregor@…>, 4 years ago

ifdef qt4 and qt5

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1/*
2 * Copyright (C) 2010 Ixonos Plc.
3 * Copyright (C) 2011-2017 Philipp Spitzer, gregor herrmann, Stefan Stahl
4 *
5 * This file is part of ConfClerk.
6 *
7 * ConfClerk is free software: you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation, either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * ConfClerk is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * ConfClerk.  If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#include <QSqlError>
22#include <QSqlQuery>
23#include <QSqlRecord>
24#include <QVariant>
25#include <QDateTime>
26#include "qglobal.h"
27#if QT_VERSION >= 0x050000
28#include <QStandardPaths>
29#else
30#include <QDesktopServices>
31#endif
32
33#include <QDir>
34#include "sqlengine.h"
35#include "track.h"
36#include "conference.h"
37
38#include <QDebug>
39
40const QString DATE_FORMAT ("yyyy-MM-dd");
41const QString TIME_FORMAT ("hh:mm");
42
43SqlEngine::SqlEngine(QObject *aParent): QObject(aParent) {
44#if QT_VERSION >= 0x050000
45    QDir dbPath(QStandardPaths::writableLocation(QStandardPaths::DataLocation));
46#else
47    QDir dbPath(QDesktopServices::storageLocation(QDesktopServices::DataLocation));
48#endif
49    dbFilename = dbPath.absoluteFilePath("ConfClerk.sqlite");
50}
51
52
53SqlEngine::~SqlEngine() {
54}
55
56
57void SqlEngine::open() {
58    // we may have to create the directory of the database
59    QFileInfo dbFilenameInfo(dbFilename);
60    QDir cwd;
61    cwd.mkpath(dbFilenameInfo.absolutePath());
62    // We don't have to handle errors because in worst case, opening the database will fail
63    // and db.isOpen() returns false.
64    db = QSqlDatabase::addDatabase("QSQLITE");
65    db.setDatabaseName(dbFilename);
66    db.open();
67}
68
69
70int SqlEngine::dbSchemaVersion() {
71    QSqlQuery query(db);
72    if (!query.exec("PRAGMA user_version")) {
73        emitSqlQueryError(query);
74        return -2;
75    }
76    query.first();
77    int version = query.value(0).toInt();
78    if (version == 0) {
79        // check whether the tables are existing
80        if (!query.exec("select count(*) from sqlite_master where name='CONFERENCE'")) {
81            emitSqlQueryError(query);
82            return -2;
83        }
84        query.first();
85        if (query.value(0).toInt() == 1) return 0; // tables are existing
86        return -1; // database seems to be empty (or has other tables)
87    }
88    return version;
89}
90
91
92bool SqlEngine::updateDbSchemaVersion000To001() {
93    return applySqlFile(":/dbschema000to001.sql");
94}
95
96
97bool SqlEngine::createCurrentDbSchema() {
98    return applySqlFile(":/dbschema001.sql");
99}
100
101
102bool SqlEngine::createOrUpdateDbSchema() {
103    int version = dbSchemaVersion();
104    switch (version) {
105    case -2:
106        // the error has already been emitted by the previous function
107        return false;
108    case -1:
109        // empty database
110        return createCurrentDbSchema();
111    case 0:
112        // db schema version 0
113        return updateDbSchemaVersion000To001();
114    case 1:
115        // current schema
116        return true;
117    default:
118        // unsupported schema
119        emit dbError(tr("Unsupported database schema version %1.").arg(version));
120    }
121    return false;
122}
123
124
125bool SqlEngine::applySqlFile(const QString sqlFile) {
126    QFile file(sqlFile);
127    file.open(QIODevice::ReadOnly | QIODevice::Text);
128    QString allSqlStatements = file.readAll();
129    QSqlQuery query(db);
130    foreach(QString sql, allSqlStatements.split(";")) {
131        if (sql.trimmed().isEmpty())  // do not execute empty queries like the last character from create_tables.sql
132            continue;
133        if (!query.exec(sql)) {
134            emitSqlQueryError(query);
135            return false;
136        }
137    }
138    return true;
139}
140
141
142void SqlEngine::addConferenceToDB(QHash<QString,QString> &aConference, int conferenceId) {
143    QSqlQuery query(db);
144    if (conferenceId <= 0) // insert conference
145    {
146        query.prepare("INSERT INTO CONFERENCE (title,url,subtitle,venue,city,start,end,"
147                                                "day_change,timeslot_duration,active) "
148                        " VALUES (:title,:url,:subtitle,:venue,:city,:start,:end,"
149                                                ":day_change,:timeslot_duration,:active)");
150        foreach (QString prop_name, (QList<QString>() << "title" << "url" << "subtitle" << "venue" << "city")) {
151            query.bindValue(QString(":") + prop_name, aConference[prop_name]);
152        }
153        query.bindValue(":start", QDateTime(QDate::fromString(aConference["start"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
154        query.bindValue(":end", QDateTime(QDate::fromString(aConference["end"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
155        query.bindValue(":day_change", -QTime::fromString(aConference["day_change"],TIME_FORMAT).secsTo(QTime(0,0)));
156        query.bindValue(":timeslot_duration", -QTime::fromString(aConference["timeslot_duration"],TIME_FORMAT).secsTo(QTime(0,0)));
157        query.bindValue(":active", 1);
158        query.exec();
159        emitSqlQueryError(query);
160        aConference["id"] = query.lastInsertId().toString(); // 'id' is assigned automatically
161    }
162    else // update conference
163    {
164        query.prepare("UPDATE CONFERENCE set title=:title, url=:url, subtitle=:subtitle, venue=:venue, city=:city, start=:start, end=:end,"
165                                            "day_change=:day_change, timeslot_duration=:timeslot_duration, active=:active "
166                      "WHERE id=:id");
167        foreach (QString prop_name, (QList<QString>() << "title" << "url" << "subtitle" << "venue" << "city")) {
168            query.bindValue(QString(":") + prop_name, aConference[prop_name]);
169        }
170        query.bindValue(":start", QDateTime(QDate::fromString(aConference["start"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
171        query.bindValue(":end", QDateTime(QDate::fromString(aConference["end"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
172        query.bindValue(":day_change", -QTime::fromString(aConference["day_change"],TIME_FORMAT).secsTo(QTime(0,0)));
173        query.bindValue(":timeslot_duration", -QTime::fromString(aConference["timeslot_duration"],TIME_FORMAT).secsTo(QTime(0,0)));
174        query.bindValue(":active", 1);
175        query.bindValue(":id", conferenceId);
176        query.exec();
177        emitSqlQueryError(query);
178        aConference["id"] = QVariant(conferenceId).toString();
179    }
180}
181
182
183void SqlEngine::addEventToDB(QHash<QString,QString> &aEvent) {
184    int conferenceId = aEvent["conference_id"].toInt();
185    Conference conference = Conference::getById(conferenceId);
186
187    // insert event track to table and get track id
188    Track track;
189    int trackId;
190    QString trackName = aEvent["track"];
191    if (trackName.isEmpty()) trackName = tr("No track");
192    try
193    {
194        track = Track::retrieveByName(conferenceId, trackName);
195        trackId = track.id();
196    }
197    catch (OrmNoObjectException &e) {
198        track.setConference(conferenceId);
199        track.setName(trackName);
200        trackId = track.insert();
201    }
202    QDate startDate = QDate::fromString(aEvent["date"], DATE_FORMAT);
203    QTime startTime = QTime::fromString(aEvent["start"], TIME_FORMAT);
204    // consider day_change (note that if day_change is e.g. at 04:00 AM, an event starting at 02:00 AM has the previous date in the XML file)
205    if (startTime < conference.dayChangeTime()) startDate = startDate.addDays(1);
206    QDateTime startDateTime;
207    startDateTime.setTimeSpec(Qt::UTC);
208    startDateTime = QDateTime(startDate, startTime, Qt::UTC);
209
210    bool event_exists = false;
211    {
212        QSqlQuery check_event_query;
213        check_event_query.prepare("SELECT * FROM EVENT WHERE xid_conference = :xid_conference AND id = :id");
214        check_event_query.bindValue(":xid_conference", aEvent["conference_id"]);
215        check_event_query.bindValue(":id", aEvent["id"]);
216        if (!check_event_query.exec()) {
217            qWarning() << "check event failed, conference id:" << aEvent["xid_conference"]
218                    << "event id:" << aEvent["id"]
219                    << "error:" << check_event_query.lastError()
220                    ;
221            return;
222        }
223        if (check_event_query.isActive() and check_event_query.isSelect() and check_event_query.next()) {
224            event_exists = true;
225        }
226    }
227
228    QSqlQuery result;
229    if (event_exists) {
230        result.prepare("UPDATE EVENT SET"
231                        " start = :start"
232                        ", duration = :duration"
233                        ", xid_track = :xid_track"
234                        ", type = :type"
235                        ", language = :language"
236                        ", tag = :tag"
237                        ", title = :title"
238                        ", subtitle = :subtitle"
239                        ", abstract = :abstract"
240                        ", description = :description"
241                            " WHERE id = :id AND xid_conference = :xid_conference");
242    } else {
243        result.prepare("INSERT INTO EVENT "
244                        " (xid_conference, id, start, duration, xid_track, type, "
245                            " language, tag, title, subtitle, abstract, description) "
246                        " VALUES (:xid_conference, :id, :start, :duration, :xid_track, :type, "
247                            ":language, :tag, :title, :subtitle, :abstract, :description)");
248    }
249    result.bindValue(":xid_conference", aEvent["conference_id"]);
250    result.bindValue(":start", QString::number(startDateTime.toTime_t()));
251    result.bindValue(":duration", -QTime::fromString(aEvent["duration"],TIME_FORMAT).secsTo(QTime(0,0)));
252    result.bindValue(":xid_track", trackId);
253    static const QList<QString> props = QList<QString>()
254        << "id" << "type" << "language" << "tag" << "title" << "subtitle" << "abstract" << "description";
255    foreach (QString prop_name, props) {
256        result.bindValue(QString(":") + prop_name, aEvent[prop_name]);
257    }
258    if (!result.exec()) {
259        qWarning() << "event insert/update failed:" << result.lastError();
260    }
261}
262
263
264void SqlEngine::addPersonToDB(QHash<QString,QString> &aPerson) {
265    QSqlQuery query(db);
266    query.prepare("INSERT INTO PERSON (xid_conference,id,name) VALUES (:xid_conference, :id, :name)");
267    query.bindValue(":xid_conference", aPerson["conference_id"]);
268    query.bindValue(":id", aPerson["id"]);
269    query.bindValue(":name", aPerson["name"]);
270    query.exec(); // TODO some queries fail due to the unique key constraint
271    // if (!query.exec()) qDebug() << "SQL query 'insert into person' failed: " << query.lastError();
272
273    query = QSqlQuery(db);
274    query.prepare("INSERT INTO EVENT_PERSON (xid_conference,xid_event,xid_person) VALUES (:xid_conference, :xid_event, :xid_person)");
275    query.bindValue(":xid_conference", aPerson["conference_id"]);
276    query.bindValue(":xid_event", aPerson["event_id"]);
277    query.bindValue(":xid_person", aPerson["id"]);
278    query.exec(); // TODO some queries fail due to the unique key constraint
279    // if (!query.exec()) qDebug() << "SQL query 'insert into event_person' failed: " << query.lastError();
280}
281
282
283void SqlEngine::addRoomToDB(QHash<QString,QString> &aRoom) {
284    QSqlQuery query(db);
285    query.prepare("SELECT id FROM ROOM WHERE xid_conference=:conference_id and name=:name");
286    query.bindValue(":conference_id", aRoom["conference_id"]);
287    query.bindValue(":name", aRoom["name"]);
288    query.exec();
289    emitSqlQueryError(query);
290    // now we have to check whether ROOM record with 'name' exists or not,
291    // - if it doesn't exist yet, then we have to add that record to 'ROOM' table
292    //   and assign autoincremented 'id' to aRoom
293    // - if it exists, then we need to get its 'id' and assign it to aRoom
294    aRoom["id"] = "";
295    if(query.next()) // ROOM record with 'name' already exists: we need to get its 'id'
296    {
297        aRoom["id"] = query.value(0).toString();
298    }
299    else // ROOM record doesn't exist yet, need to create it
300    {
301        query = QSqlQuery(db);
302        query.prepare("INSERT INTO ROOM (xid_conference,name) VALUES (:xid_conference, :name)");
303        query.bindValue(":xid_conference", aRoom["conference_id"]);
304        query.bindValue(":name", aRoom["name"]);
305        query.exec();
306        emitSqlQueryError(query);
307        aRoom["id"]= query.lastInsertId().toString(); // 'id' is assigned automatically
308        //LOG_AUTOTEST(query);
309    }
310
311    // remove previous conference/room records; room names might have changed
312    query = QSqlQuery(db);
313    query.prepare("DELETE FROM EVENT_ROOM WHERE xid_conference=:conference_id AND xid_event=:event_id");
314    query.bindValue(":conference_id", aRoom["conference_id"]);
315    query.bindValue(":event_id", aRoom["event_id"]);
316    query.exec();
317    emitSqlQueryError(query);
318    // and insert new ones
319    query = QSqlQuery(db);
320    query.prepare("INSERT INTO EVENT_ROOM (xid_conference,xid_event,xid_room) VALUES (:conference_id, :event_id, :room_id)");
321    query.bindValue(":conference_id", aRoom["conference_id"]);
322    query.bindValue(":event_id", aRoom["event_id"]);
323    query.bindValue(":room_id", aRoom["id"]);
324    query.exec();
325    emitSqlQueryError(query);
326}
327
328
329void SqlEngine::addLinkToDB(QHash<QString,QString> &aLink) {
330    //TODO: check if the link doesn't exist before inserting
331    QSqlQuery query(db);
332    query.prepare("INSERT INTO LINK (xid_event, xid_conference, name, url) VALUES (:xid_event, :xid_conference, :name, :url)");
333    query.bindValue(":xid_event", aLink["event_id"]);
334    query.bindValue(":xid_conference", aLink["conference_id"]);
335    query.bindValue(":name", aLink["name"]);
336    query.bindValue(":url", aLink["url"]);
337    query.exec();
338    emitSqlQueryError(query);
339}
340
341
342bool SqlEngine::searchEvent(int aConferenceId, const QHash<QString,QString> &aColumns, const QString &aKeyword) {
343    if (aColumns.empty()) return false;
344
345    // DROP
346    QSqlQuery query(db);
347    query.exec("DROP TABLE IF EXISTS SEARCH_EVENT");
348    emitSqlQueryError(query);
349
350    // CREATE
351    query.exec("CREATE TEMP TABLE SEARCH_EVENT ( xid_conference INTEGER  NOT NULL, id INTEGER NOT NULL )");
352    emitSqlQueryError(query);
353
354    // INSERT
355    QString sql = QString("INSERT INTO SEARCH_EVENT ( xid_conference, id ) "
356                "SELECT DISTINCT EVENT.xid_conference, EVENT.id FROM EVENT ");
357    if( aColumns.contains("ROOM") ){
358        sql += "LEFT JOIN EVENT_ROOM ON ( EVENT.xid_conference = EVENT_ROOM.xid_conference AND EVENT.id = EVENT_ROOM.xid_event ) ";
359        sql += "LEFT JOIN ROOM ON ( EVENT_ROOM.xid_room = ROOM.id ) ";
360    }
361    if( aColumns.contains("PERSON") ){
362        sql += "LEFT JOIN EVENT_PERSON ON ( EVENT.xid_conference = EVENT_PERSON.xid_conference AND EVENT.id = EVENT_PERSON.xid_event ) ";
363        sql += "LEFT JOIN PERSON ON ( EVENT_PERSON.xid_person = PERSON.id ) ";
364    }
365    sql += QString("WHERE EVENT.xid_conference = %1 AND (").arg( aConferenceId );
366
367    QStringList searchKeywords = aKeyword.trimmed().split(QRegExp("\\s+"));
368    QStringList whereAnd;
369    for (int i=0; i < searchKeywords.count(); i++) {
370        QStringList whereOr;
371        foreach (QString table, aColumns.uniqueKeys()) {
372            foreach (QString column, aColumns.values(table)){
373                 whereOr.append(QString("%1.%2 LIKE '\%' || :%1%2%3 || '\%'").arg(table).arg(column).arg(i));
374            }
375        }
376        whereAnd.append(whereOr.join(" OR "));
377    }
378    sql += whereAnd.join(") AND (");
379    sql += QString(")");
380
381    query.prepare(sql);
382    for (int i = 0; i != searchKeywords.size(); ++i) {
383        QString keyword = searchKeywords[i];
384        foreach (QString table, aColumns.uniqueKeys()) {
385            foreach (QString column, aColumns.values(table)) {
386                query.bindValue(QString(":%1%2%3").arg(table).arg(column).arg(i), keyword );
387            }
388        }
389    }
390
391    bool success = query.exec();
392    emitSqlQueryError(query);
393    return success;
394}
395
396
397bool SqlEngine::beginTransaction() {
398    QSqlQuery query(db);
399    bool success = query.exec("BEGIN IMMEDIATE TRANSACTION");
400    emitSqlQueryError(query);
401    return success;
402}
403
404
405bool SqlEngine::commitTransaction() {
406    QSqlQuery query(db);
407    bool success = query.exec("COMMIT");
408    emitSqlQueryError(query);
409    return success;
410}
411
412
413bool SqlEngine::deleteConference(int id) {
414    QSqlQuery query(db);
415    bool success = query.exec("BEGIN IMMEDIATE TRANSACTION");
416    emitSqlQueryError(query);
417
418    QStringList sqlList;
419    sqlList << "DELETE FROM LINK WHERE xid_conference = ?"
420            << "DELETE FROM EVENT_ROOM WHERE xid_conference = ?"
421            << "DELETE FROM EVENT_PERSON WHERE xid_conference = ?"
422            << "DELETE FROM EVENT WHERE xid_conference = ?"
423            << "DELETE FROM ROOM WHERE xid_conference = ?"
424            << "DELETE FROM PERSON WHERE xid_conference = ?"
425            << "DELETE FROM TRACK WHERE xid_conference = ?"
426            << "DELETE FROM CONFERENCE WHERE id = ?";
427
428    foreach (const QString& sql, sqlList) {
429        query.prepare(sql);
430        query.bindValue(0, id);
431        success &= query.exec();
432        emitSqlQueryError(query);
433    }
434
435    success &= query.exec("COMMIT");
436    emitSqlQueryError(query);
437
438    return success;
439}
440
441
442void SqlEngine::emitSqlQueryError(const QSqlQuery &query) {
443    QSqlError error = query.lastError();
444    if (error.type() == QSqlError::NoError) return;
445    emit dbError(error.text());
446}
447
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