source: src/sql/sqlengine.cpp @ 41c4ceb

qt5
Last change on this file since 41c4ceb was 41c4ceb, checked in by Philipp Spitzer <philipp@…>, 9 years ago

Now the dayChange time is taken into account. This fixes #43.

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1/*
2 * Copyright (C) 2010 Ixonos Plc.
3 * Copyright (C) 2011-2013 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
27#include <QDir>
28#include <QDesktopServices>
29#include "sqlengine.h"
30#include "track.h"
31#include "conference.h"
32
33#include <QDebug>
34
35const QString DATE_FORMAT ("yyyy-MM-dd");
36const QString TIME_FORMAT ("hh:mm");
37
38SqlEngine::SqlEngine(QObject *aParent): QObject(aParent) {
39    QDir dbPath(QDesktopServices::storageLocation(QDesktopServices::DataLocation));
40    dbFilename = dbPath.absoluteFilePath("ConfClerk.sqlite");
41}
42
43
44SqlEngine::~SqlEngine() {
45}
46
47
48void SqlEngine::open() {
49    // we may have to create the directory of the database
50    QFileInfo dbFilenameInfo(dbFilename);
51    QDir cwd;
52    cwd.mkpath(dbFilenameInfo.absolutePath());
53    // We don't have to handle errors because in worst case, opening the database will fail
54    // and db.isOpen() returns false.
55    db = QSqlDatabase::addDatabase("QSQLITE");
56    db.setDatabaseName(dbFilename);
57    db.open();
58}
59
60
61int SqlEngine::dbSchemaVersion() {
62    QSqlQuery query(db);
63    if (!query.exec("PRAGMA user_version")) {
64        emitSqlQueryError(query);
65        return -2;
66    }
67    query.first();
68    int version = query.value(0).toInt();
69    if (version == 0) {
70        // check whether the tables are existing
71        if (!query.exec("select count(*) from sqlite_master where name='CONFERENCE'")) {
72            emitSqlQueryError(query);
73            return -2;
74        }
75        query.first();
76        if (query.value(0).toInt() == 1) return 0; // tables are existing
77        return -1; // database seems to be empty (or has other tables)
78    }
79    return version;
80}
81
82
83bool SqlEngine::updateDbSchemaVersion000To001() {
84    return applySqlFile(":/dbschema000to001.sql");
85}
86
87
88bool SqlEngine::createCurrentDbSchema() {
89    return applySqlFile(":/dbschema001.sql");
90}
91
92
93bool SqlEngine::createOrUpdateDbSchema() {
94    int version = dbSchemaVersion();
95    switch (version) {
96    case -2:
97        // the error has already been emitted by the previous function
98        return false;
99    case -1:
100        // empty database
101        return createCurrentDbSchema();
102    case 0:
103        // db schema version 0
104        return updateDbSchemaVersion000To001();
105    case 1:
106        // current schema
107        return true;
108    default:
109        // unsupported schema
110        emit dbError(tr("Unsupported database schema version %1.").arg(version));
111    }
112    return false;
113}
114
115
116bool SqlEngine::applySqlFile(const QString sqlFile) {
117    QFile file(sqlFile);
118    file.open(QIODevice::ReadOnly | QIODevice::Text);
119    QString allSqlStatements = file.readAll();
120    QSqlQuery query(db);
121    foreach(QString sql, allSqlStatements.split(";")) {
122        if (sql.trimmed().isEmpty())  // do not execute empty queries like the last character from create_tables.sql
123            continue;
124        if (!query.exec(sql)) {
125            emitSqlQueryError(query);
126            return false;
127        }
128    }
129    return true;
130}
131
132
133void SqlEngine::addConferenceToDB(QHash<QString,QString> &aConference, int conferenceId) {
134    QSqlQuery query(db);
135    if (conferenceId <= 0) // insert conference
136    {
137        query.prepare("INSERT INTO CONFERENCE (title,url,subtitle,venue,city,start,end,"
138                                                "day_change,timeslot_duration,active) "
139                        " VALUES (:title,:url,:subtitle,:venue,:city,:start,:end,"
140                                                ":day_change,:timeslot_duration,:active)");
141        foreach (QString prop_name, (QList<QString>() << "title" << "url" << "subtitle" << "venue" << "city")) {
142            query.bindValue(QString(":") + prop_name, aConference[prop_name]);
143        }
144        query.bindValue(":start", QDateTime(QDate::fromString(aConference["start"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
145        query.bindValue(":end", QDateTime(QDate::fromString(aConference["end"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
146        query.bindValue(":day_change", -QTime::fromString(aConference["day_change"],TIME_FORMAT).secsTo(QTime(0,0)));
147        query.bindValue(":timeslot_duration", -QTime::fromString(aConference["timeslot_duration"],TIME_FORMAT).secsTo(QTime(0,0)));
148        query.bindValue(":active", 1);
149        query.exec();
150        emitSqlQueryError(query);
151        aConference["id"] = query.lastInsertId().toString(); // 'id' is assigned automatically
152    }
153    else // update conference
154    {
155        query.prepare("UPDATE CONFERENCE set title=:title, url=:url, subtitle=:subtitle, venue=:venue, city=:city, start=:start, end=:end,"
156                                            "day_change=:day_change, timeslot_duration=:timeslot_duration, active=:active "
157                      "WHERE id=:id");
158        foreach (QString prop_name, (QList<QString>() << "title" << "url" << "subtitle" << "venue" << "city")) {
159            query.bindValue(QString(":") + prop_name, aConference[prop_name]);
160        }
161        query.bindValue(":start", QDateTime(QDate::fromString(aConference["start"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
162        query.bindValue(":end", QDateTime(QDate::fromString(aConference["end"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
163        query.bindValue(":day_change", -QTime::fromString(aConference["day_change"],TIME_FORMAT).secsTo(QTime(0,0)));
164        query.bindValue(":timeslot_duration", -QTime::fromString(aConference["timeslot_duration"],TIME_FORMAT).secsTo(QTime(0,0)));
165        query.bindValue(":active", 1);
166        query.bindValue(":id", conferenceId);
167        query.exec();
168        emitSqlQueryError(query);
169        aConference["id"] = QVariant(conferenceId).toString();
170    }
171}
172
173
174void SqlEngine::addEventToDB(QHash<QString,QString> &aEvent) {
175    int conferenceId = aEvent["conference_id"].toInt();
176    Conference conference = Conference::getById(conferenceId);
177
178    // insert event track to table and get track id
179    Track track;
180    int trackId;
181    QString trackName = aEvent["track"];
182    try
183    {
184        track = Track::retrieveByName(conferenceId, trackName);
185        trackId = track.id();
186    }
187    catch (OrmNoObjectException &e) {
188        track.setConference(conferenceId);
189        track.setName(trackName);
190        trackId = track.insert();
191    }
192    QDate startDate = QDate::fromString(aEvent["date"], DATE_FORMAT);
193    QTime startTime = QTime::fromString(aEvent["start"], TIME_FORMAT);
194    // 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)
195    if (startTime < conference.dayChangeTime()) startDate = startDate.addDays(1);
196    QDateTime startDateTime;
197    startDateTime.setTimeSpec(Qt::UTC);
198    startDateTime = QDateTime(startDate, startTime, Qt::UTC);
199
200    bool event_exists = false;
201    {
202        QSqlQuery check_event_query;
203        check_event_query.prepare("SELECT * FROM EVENT WHERE xid_conference = :xid_conference AND id = :id");
204        check_event_query.bindValue(":xid_conference", aEvent["conference_id"]);
205        check_event_query.bindValue(":id", aEvent["id"]);
206        if (!check_event_query.exec()) {
207            qWarning() << "check event failed, conference id:" << aEvent["xid_conference"]
208                    << "event id:" << aEvent["id"]
209                    << "error:" << check_event_query.lastError()
210                    ;
211            return;
212        }
213        if (check_event_query.isActive() and check_event_query.isSelect() and check_event_query.next()) {
214            event_exists = true;
215        }
216    }
217
218    QSqlQuery result;
219    if (event_exists) {
220        result.prepare("UPDATE EVENT SET"
221                        " start = :start"
222                        ", duration = :duration"
223                        ", xid_track = :xid_track"
224                        ", type = :type"
225                        ", language = :language"
226                        ", tag = :tag"
227                        ", title = :title"
228                        ", subtitle = :subtitle"
229                        ", abstract = :abstract"
230                        ", description = :description"
231                            " WHERE id = :id AND xid_conference = :xid_conference");
232    } else {
233        result.prepare("INSERT INTO EVENT "
234                        " (xid_conference, id, start, duration, xid_track, type, "
235                            " language, tag, title, subtitle, abstract, description) "
236                        " VALUES (:xid_conference, :id, :start, :duration, :xid_track, :type, "
237                            ":language, :tag, :title, :subtitle, :abstract, :description)");
238    }
239    result.bindValue(":xid_conference", aEvent["conference_id"]);
240    result.bindValue(":start", QString::number(startDateTime.toTime_t()));
241    result.bindValue(":duration", -QTime::fromString(aEvent["duration"],TIME_FORMAT).secsTo(QTime(0,0)));
242    result.bindValue(":xid_track", trackId);
243    static const QList<QString> props = QList<QString>()
244        << "id" << "type" << "language" << "tag" << "title" << "subtitle" << "abstract" << "description";
245    foreach (QString prop_name, props) {
246        result.bindValue(QString(":") + prop_name, aEvent[prop_name]);
247    }
248    if (!result.exec()) {
249        qWarning() << "event insert/update failed:" << result.lastError();
250    }
251}
252
253
254void SqlEngine::addPersonToDB(QHash<QString,QString> &aPerson) {
255    QSqlQuery query(db);
256    query.prepare("INSERT INTO PERSON (xid_conference,id,name) VALUES (:xid_conference, :id, :name)");
257    query.bindValue(":xid_conference", aPerson["conference_id"]);
258    query.bindValue(":id", aPerson["id"]);
259    query.bindValue(":name", aPerson["name"]);
260    query.exec(); // TODO some queries fail due to the unique key constraint
261    // if (!query.exec()) qDebug() << "SQL query 'insert into person' failed: " << query.lastError();
262
263    query = QSqlQuery(db);
264    query.prepare("INSERT INTO EVENT_PERSON (xid_conference,xid_event,xid_person) VALUES (:xid_conference, :xid_event, :xid_person)");
265    query.bindValue(":xid_conference", aPerson["conference_id"]);
266    query.bindValue(":xid_event", aPerson["event_id"]);
267    query.bindValue(":xid_person", aPerson["id"]);
268    query.exec(); // TODO some queries fail due to the unique key constraint
269    // if (!query.exec()) qDebug() << "SQL query 'insert into event_person' failed: " << query.lastError();
270}
271
272
273void SqlEngine::addRoomToDB(QHash<QString,QString> &aRoom) {
274    QSqlQuery query(db);
275    query.prepare("SELECT id FROM ROOM WHERE xid_conference=:conference_id and name=:name");
276    query.bindValue(":conference_id", aRoom["conference_id"]);
277    query.bindValue(":name", aRoom["name"]);
278    query.exec();
279    emitSqlQueryError(query);
280    // now we have to check whether ROOM record with 'name' exists or not,
281    // - if it doesn't exist yet, then we have to add that record to 'ROOM' table
282    //   and assign autoincremented 'id' to aRoom
283    // - if it exists, then we need to get its 'id' and assign it to aRoom
284    aRoom["id"] = "";
285    if(query.next()) // ROOM record with 'name' already exists: we need to get its 'id'
286    {
287        aRoom["id"] = query.value(0).toString();
288    }
289    else // ROOM record doesn't exist yet, need to create it
290    {
291        query = QSqlQuery(db);
292        query.prepare("INSERT INTO ROOM (xid_conference,name) VALUES (:xid_conference, :name)");
293        query.bindValue(":xid_conference", aRoom["conference_id"]);
294        query.bindValue(":xid_name", aRoom["name"]);
295        query.exec();
296        emitSqlQueryError(query);
297        aRoom["id"]= query.lastInsertId().toString(); // 'id' is assigned automatically
298        //LOG_AUTOTEST(query);
299    }
300
301    // remove previous conference/room records; room names might have changed
302    query = QSqlQuery(db);
303    query.prepare("DELETE FROM EVENT_ROOM WHERE xid_conference=:conference_id AND xid_event=:event_id");
304    query.bindValue(":conference_id", aRoom["conference_id"]);
305    query.bindValue(":event_id", aRoom["event_id"]);
306    query.exec();
307    emitSqlQueryError(query);
308    // and insert new ones
309    query = QSqlQuery(db);
310    query.prepare("INSERT INTO EVENT_ROOM (xid_conference,xid_event,xid_room) VALUES (:conference_id, :event_id, :room_id)");
311    query.bindValue(":conference_id", aRoom["conference_id"]);
312    query.bindValue(":event_id", aRoom["event_id"]);
313    query.bindValue(":room_id", aRoom["id"]);
314    query.exec();
315    emitSqlQueryError(query);
316}
317
318
319void SqlEngine::addLinkToDB(QHash<QString,QString> &aLink) {
320    //TODO: check if the link doesn't exist before inserting
321    QSqlQuery query(db);
322    query.prepare("INSERT INTO LINK (xid_event, xid_conference, name, url) VALUES (:xid_event, :xid_conference, :name, :url)");
323    query.bindValue(":xid_event", aLink["event_id"]);
324    query.bindValue(":xid_conference", aLink["conference_id"]);
325    query.bindValue(":name", aLink["name"]);
326    query.bindValue(":url", aLink["url"]);
327    query.exec();
328    emitSqlQueryError(query);
329}
330
331
332bool SqlEngine::searchEvent(int aConferenceId, const QHash<QString,QString> &aColumns, const QString &aKeyword) {
333    if (aColumns.empty()) return false;
334
335    // DROP
336    QSqlQuery query(db);
337    query.exec("DROP TABLE IF EXISTS SEARCH_EVENT");
338    emitSqlQueryError(query);
339
340    // CREATE
341    query.exec("CREATE TEMP TABLE SEARCH_EVENT ( xid_conference INTEGER  NOT NULL, id INTEGER NOT NULL )");
342    emitSqlQueryError(query);
343
344    // INSERT
345    QString sql = QString("INSERT INTO SEARCH_EVENT ( xid_conference, id ) "
346                "SELECT DISTINCT EVENT.xid_conference, EVENT.id FROM EVENT ");
347    if( aColumns.contains("ROOM") ){
348        sql += "LEFT JOIN EVENT_ROOM ON ( EVENT.xid_conference = EVENT_ROOM.xid_conference AND EVENT.id = EVENT_ROOM.xid_event ) ";
349        sql += "LEFT JOIN ROOM ON ( EVENT_ROOM.xid_room = ROOM.id ) ";
350    }
351    if( aColumns.contains("PERSON") ){
352        sql += "LEFT JOIN EVENT_PERSON ON ( EVENT.xid_conference = EVENT_PERSON.xid_conference AND EVENT.id = EVENT_PERSON.xid_event ) ";
353        sql += "LEFT JOIN PERSON ON ( EVENT_PERSON.xid_person = PERSON.id ) ";
354    }
355    sql += QString("WHERE EVENT.xid_conference = %1 AND (").arg( aConferenceId );
356
357    QStringList searchKeywords = aKeyword.trimmed().split(QRegExp("\\s+"));
358    QStringList whereAnd;
359    for (int i=0; i < searchKeywords.count(); i++) {
360        QStringList whereOr;
361        foreach (QString table, aColumns.uniqueKeys()) {
362            foreach (QString column, aColumns.values(table)){
363                 whereOr.append(QString("%1.%2 LIKE '\%' || :%1%2%3 || '\%'").arg(table).arg(column).arg(i));
364            }
365        }
366        whereAnd.append(whereOr.join(" OR "));
367    }
368    sql += whereAnd.join(") AND (");
369    sql += QString(")");
370
371    query.prepare(sql);
372    for (int i = 0; i != searchKeywords.size(); ++i) {
373        QString keyword = searchKeywords[i];
374        foreach (QString table, aColumns.uniqueKeys()) {
375            foreach (QString column, aColumns.values(table)) {
376                query.bindValue(QString(":%1%2%3").arg(table).arg(column).arg(i), keyword );
377            }
378        }
379    }
380
381    bool success = query.exec();
382    emitSqlQueryError(query);
383    return success;
384}
385
386
387bool SqlEngine::beginTransaction() {
388    QSqlQuery query(db);
389    bool success = query.exec("BEGIN IMMEDIATE TRANSACTION");
390    emitSqlQueryError(query);
391    return success;
392}
393
394
395bool SqlEngine::commitTransaction() {
396    QSqlQuery query(db);
397    bool success = query.exec("COMMIT");
398    emitSqlQueryError(query);
399    return success;
400}
401
402
403bool SqlEngine::deleteConference(int id) {
404    QSqlQuery query(db);
405    bool success = query.exec("BEGIN IMMEDIATE TRANSACTION");
406    emitSqlQueryError(query);
407
408    QStringList sqlList;
409    sqlList << "DELETE FROM LINK WHERE xid_conference = ?"
410            << "DELETE FROM EVENT_ROOM WHERE xid_conference = ?"
411            << "DELETE FROM EVENT_PERSON WHERE xid_conference = ?"
412            << "DELETE FROM EVENT WHERE xid_conference = ?"
413            << "DELETE FROM ROOM WHERE xid_conference = ?"
414            << "DELETE FROM PERSON WHERE xid_conference = ?"
415            << "DELETE FROM TRACK WHERE xid_conference = ?"
416            << "DELETE FROM CONFERENCE WHERE id = ?";
417
418    foreach (const QString& sql, sqlList) {
419        query.prepare(sql);
420        query.bindValue(0, id);
421        success &= query.exec();
422        emitSqlQueryError(query);
423    }
424
425    success &= query.exec("COMMIT");
426    emitSqlQueryError(query);
427
428    return success;
429}
430
431
432void SqlEngine::emitSqlQueryError(const QSqlQuery &query) {
433    QSqlError error = query.lastError();
434    if (error.type() == QSqlError::NoError) return;
435    emit dbError(error.text());
436}
437
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