source: src/sql/sqlengine.cpp @ 4147e08

qt5
Last change on this file since 4147e08 was 4147e08, checked in by gregor herrmann <gregoa@…>, 10 years ago

Add Stefan as a copyright holder to source files, too.

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1/*
2 * Copyright (C) 2010 Ixonos Plc.
3 * Copyright (C) 2011-2012 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)
39    : QObject(aParent)
40{
41}
42
43SqlEngine::~SqlEngine()
44{
45}
46
47QString SqlEngine::login(const QString &aDatabaseType, const QString &aDatabaseName)
48{
49    QSqlDatabase database = QSqlDatabase::addDatabase(aDatabaseType);
50    database.setDatabaseName(aDatabaseName);
51
52    bool result = false;
53    if(!QFile::exists(aDatabaseName)) // the DB (tables) doesn't exists, and so we have to create one
54    {
55        // create Db
56        if (!database.open()) qDebug() << "Could not open database" << database.lastError();
57        QFile file(":/create_tables.sql");
58        file.open(QIODevice::ReadOnly | QIODevice::Text);
59        QString allSqlStatements = file.readAll();
60        foreach(QString sql, allSqlStatements.split(";")) {
61            if (sql.trimmed().length() == 0)     // do not execute empty queries like the last character from create_tables.sql
62                continue;
63            QSqlQuery query(database);
64            if (!query.exec(sql)) qDebug() << "Could not execute query '" << sql << "' error:" << query.lastError();
65        }
66    }
67    else
68    {
69        database.open();
70    }
71
72    //LOG_INFO(QString("Opening '%1' database '%2'").arg(aDatabaseType).arg(aDatabaseName));
73
74    return result ? QString() : database.lastError().text();
75}
76
77void SqlEngine::initialize()
78{
79    QString databaseName;
80    QString dataDirName;
81    dataDirName = QDesktopServices::storageLocation(QDesktopServices::DataLocation);
82    QDir dataDir = QDir(dataDirName).absolutePath();
83    if(!dataDir.exists())
84        dataDir.mkpath(dataDirName);
85    databaseName = dataDirName + "/ConfClerk.sqlite";
86    login("QSQLITE",databaseName);
87}
88
89void SqlEngine::addConferenceToDB(QHash<QString,QString> &aConference)
90{
91    QSqlDatabase db = QSqlDatabase::database();
92
93    if (db.isValid() && db.isOpen())
94    {
95        int confId = 0;
96        QList<Conference> confsList = Conference::getAll();
97        if(confsList.count())
98        {
99            QListIterator<Conference> i(confsList);
100            while (i.hasNext())
101            {
102                Conference conf = i.next();
103                if( aConference["title"] == conf.title() )
104                {
105                    confId = conf.id();
106                    aConference["id"] = QString::number(confId);
107                    break;
108                }
109            }
110        }
111
112        if(!confId) // conference 'aConference' isn't in the table => insert
113        {
114            // HACK
115            // When city is empty, assign a dummy value. We probably want to find a way to change the database scheme ...
116            // cf. #32
117            if (aConference["city"].isEmpty()) aConference["city"] = "n/a";
118
119            QSqlQuery query(db);
120            query.prepare("INSERT INTO CONFERENCE (title,url,subtitle,venue,city,start,end,days,"
121                                                    "day_change,timeslot_duration,active) "
122                            " VALUES (:title,:url,:subtitle,:venue,:city,:start,:end,:days,"
123                                                    ":day_change,:timeslot_duration,:active)");
124            foreach (QString prop_name, (QList<QString>() << "title" << "url" << "subtitle" << "venue" << "city" << "days")) {
125                query.bindValue(QString(":") + prop_name, aConference[prop_name]);
126            }
127            query.bindValue(":start", QDateTime(QDate::fromString(aConference["start"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
128            query.bindValue(":end", QDateTime(QDate::fromString(aConference["end"],DATE_FORMAT),QTime(0,0),Qt::UTC).toTime_t());
129            query.bindValue(":day_change", -QTime::fromString(aConference["day_change"],TIME_FORMAT).secsTo(QTime(0,0)));
130            query.bindValue(":day_change", -QTime::fromString(aConference["timeslot_duration"],TIME_FORMAT).secsTo(QTime(0,0)));
131            query.bindValue(":active", confsList.count() > 0 ? 0 : 1);
132            if (!query.exec()) qDebug() << "Could not execute query to insert a conference:" << query.lastError();
133            aConference["id"] = query.lastInsertId().toString(); // 'id' is assigned automatically
134        }
135    }
136}
137
138void SqlEngine::addEventToDB(QHash<QString,QString> &aEvent)
139{
140    QSqlDatabase db = QSqlDatabase::database();
141
142    if (db.isValid() && db.isOpen())
143    {
144        //insert event track to table and get track id
145        int conference = aEvent["conference_id"].toInt();
146        QString name = aEvent["track"];
147        Track track;
148        int trackId;
149        try
150        {
151            track = Track::retrieveByName(conference, name);
152            trackId = track.id();
153        }
154        catch (OrmNoObjectException &e) {
155            track.setConference(conference);
156            track.setName(name);
157            trackId = track.insert();
158        }
159        QDateTime startDateTime;
160        startDateTime.setTimeSpec(Qt::UTC);
161        startDateTime = QDateTime(QDate::fromString(aEvent["date"],DATE_FORMAT),QTime::fromString(aEvent["start"],TIME_FORMAT),Qt::UTC);
162
163        bool event_exists = false;
164        {
165            QSqlQuery check_event_query;
166            check_event_query.prepare("SELECT * FROM EVENT WHERE xid_conference = :xid_conference AND id = :id");
167            check_event_query.bindValue(":xid_conference", aEvent["conference_id"]);
168            check_event_query.bindValue(":id", aEvent["id"]);
169            if (!check_event_query.exec()) {
170                qWarning() << "check event failed, conference id:" << aEvent["xid_conference"]
171                        << "event id:" << aEvent["id"]
172                        << "error:" << check_event_query.lastError()
173                        ;
174                return;
175            }
176            if (check_event_query.isActive() and check_event_query.isSelect() and check_event_query.next()) {
177                event_exists = true;
178            }
179        }
180
181        QSqlQuery result;
182        if (event_exists) {
183            result.prepare("UPDATE EVENT SET"
184                            " start = :start"
185                            ", duration = :duration"
186                            ", xid_track = :xid_track"
187                            ", type = :type"
188                            ", language = :language"
189                            ", tag = :tag"
190                            ", title = :title"
191                            ", subtitle = :subtitle"
192                            ", abstract = :abstract"
193                            ", description = :description"
194                                " WHERE id = :id AND xid_conference = :xid_conference");
195        } else {
196            result.prepare("INSERT INTO EVENT "
197                            " (xid_conference, id, start, duration, xid_track, type, "
198                                " language, tag, title, subtitle, abstract, description) "
199                            " VALUES (:xid_conference, :id, :start, :duration, :xid_track, :type, "
200                                ":language, :tag, :title, :subtitle, :abstract, :description)");
201        }
202        result.bindValue(":xid_conference", aEvent["conference_id"]);
203        result.bindValue(":start", QString::number(startDateTime.toTime_t()));
204        result.bindValue(":duration", -QTime::fromString(aEvent["duration"],TIME_FORMAT).secsTo(QTime(0,0)));
205        result.bindValue(":xid_track", trackId);
206        static const QList<QString> props = QList<QString>()
207            << "id" << "type" << "language" << "tag" << "title" << "subtitle" << "abstract" << "description";
208        foreach (QString prop_name, props) {
209            result.bindValue(QString(":") + prop_name, aEvent[prop_name]);
210        }
211        if (!result.exec()) {
212            qWarning() << "event insert/update failed:" << result.lastError();
213        }
214    }
215}
216
217void SqlEngine::addPersonToDB(QHash<QString,QString> &aPerson)
218{
219    QSqlDatabase db = QSqlDatabase::database();
220
221    if (db.isValid() && db.isOpen())
222    {
223        QSqlQuery query(db);
224        query.prepare("INSERT INTO PERSON (xid_conference,id,name) VALUES (:xid_conference, :id, :name)");
225        query.bindValue(":xid_conference", aPerson["conference_id"]);
226        query.bindValue(":id", aPerson["id"]);
227        query.bindValue(":name", aPerson["name"]);
228        query.exec(); // some queries fail due to the unique key constraint
229        // if (!query.exec()) qDebug() << "SQL query 'insert into person' failed: " << query.lastError();
230
231        query = QSqlQuery(db);
232        query.prepare("INSERT INTO EVENT_PERSON (xid_conference,xid_event,xid_person) VALUES (:xid_conference, :xid_event, :xid_person)");
233        query.bindValue(":xid_conference", aPerson["conference_id"]);
234        query.bindValue(":xid_event", aPerson["event_id"]);
235        query.bindValue(":xid_person", aPerson["id"]);
236        query.exec(); // some queries fail due to the unique key constraint
237        // if (!query.exec()) qDebug() << "SQL query 'insert into event_person' failed: " << query.lastError();
238    }
239}
240
241void SqlEngine::addRoomToDB(QHash<QString,QString> &aRoom)
242{
243    QSqlDatabase db = QSqlDatabase::database();
244
245    if (db.isValid() && db.isOpen())
246    {
247        QSqlQuery query(db);
248        query.prepare("SELECT id FROM ROOM WHERE xid_conference=:conference_id and name=:name");
249        query.bindValue(":conference_id", aRoom["conference_id"]);
250        query.bindValue(":name", aRoom["name"]);
251        if (!query.exec()) qDebug() << "Could not execute select room query: " << query.lastError();
252        // now we have to check whether ROOM record with 'name' exists or not,
253        // - if it doesn't exist yet, then we have to add that record to 'ROOM' table
254        //   and assign autoincremented 'id' to aRoom
255        // - if it exists, then we need to get its 'id' and assign it to aRoom
256        aRoom["id"] = "";
257        if(query.next()) // ROOM record with 'name' already exists: we need to get its 'id'
258        {
259            aRoom["id"] = query.value(0).toString();
260        }
261        else // ROOM record doesn't exist yet, need to create it
262        {
263            query = QSqlQuery(db);
264            query.prepare("INSERT INTO ROOM (xid_conference,name,picture) VALUES (:xid_conference, :name, '')");
265            query.bindValue(":xid_conference", aRoom["conference_id"]);
266            query.bindValue(":xid_name", aRoom["name"]);
267            if (!query.exec()) qDebug() << "Could not execute 'insert into room ...' query." << query.lastError();
268            aRoom["id"]= query.lastInsertId().toString(); // 'id' is assigned automatically
269            //LOG_AUTOTEST(query);
270        }
271       
272        // remove previous conference/room records; room names might have changed
273        query = QSqlQuery(db);
274        query.prepare("DELETE FROM EVENT_ROOM WHERE xid_conference=:conference_id AND xid_event=:event_id");
275        query.bindValue(":conference_id", aRoom["conference_id"]);
276        query.bindValue(":event_id", aRoom["event_id"]);
277        if (!query.exec()) qDebug() << "Could not execute SELECT * FROM EVENT_ROOM' query:" << query.lastError();
278        // and insert new ones
279        query = QSqlQuery(db);
280        query.prepare("INSERT INTO EVENT_ROOM (xid_conference,xid_event,xid_room) VALUES (:conference_id, :event_id, :room_id)");
281        query.bindValue(":conference_id", aRoom["conference_id"]);
282        query.bindValue(":event_id", aRoom["event_id"]);
283        query.bindValue(":room_id", aRoom["id"]);
284        if (!query.exec()) qDebug() << "Could not 'execute insert into event_room' query:" << query.lastError();
285    }
286}
287
288void SqlEngine::addLinkToDB(QHash<QString,QString> &aLink)
289{
290    QSqlDatabase db = QSqlDatabase::database();
291
292    //TODO: check if the link doesn't exist before inserting
293    if (db.isValid() && db.isOpen())
294    {
295        QSqlQuery query(db);
296        query.prepare("INSERT INTO LINK (xid_event, xid_conference, name, url) VALUES (:xid_event, :xid_conference, :name, :url)");
297        query.bindValue(":xid_event", aLink["event_id"]);
298        query.bindValue(":xid_conference", aLink["conference_id"]);
299        query.bindValue(":name", aLink["name"]);
300        query.bindValue(":url", aLink["url"]);
301        if (!query.exec()) qDebug() << "Error executing 'insert into link' query: " << query.lastError();
302    }
303}
304
305int SqlEngine::searchEvent(int aConferenceId, const QHash<QString,QString> &aColumns, const QString &aKeyword)
306{
307    QSqlDatabase db = QSqlDatabase::database();
308
309    if ( !db.isValid() || !db.isOpen())
310        return -1;
311
312    if (aColumns.empty()) return -1;
313
314    // DROP
315    execQuery( db, "DROP TABLE IF EXISTS SEARCH_EVENT");
316    // CREATE
317    execQuery( db, "CREATE TEMP TABLE SEARCH_EVENT ( xid_conference INTEGER  NOT NULL, id INTEGER NOT NULL )");
318    // INSERT
319    QString sql = QString("INSERT INTO SEARCH_EVENT ( xid_conference, id ) "
320                "SELECT DISTINCT EVENT.xid_conference, EVENT.id FROM EVENT ");
321    if( aColumns.contains("ROOM") ){
322        sql += "LEFT JOIN EVENT_ROOM ON ( EVENT.xid_conference = EVENT_ROOM.xid_conference AND EVENT.id = EVENT_ROOM.xid_event ) ";
323        sql += "LEFT JOIN ROOM ON ( EVENT_ROOM.xid_room = ROOM.id ) ";
324    }
325    if( aColumns.contains("PERSON") ){
326        sql += "LEFT JOIN EVENT_PERSON ON ( EVENT.xid_conference = EVENT_PERSON.xid_conference AND EVENT.id = EVENT_PERSON.xid_event ) ";
327        sql += "LEFT JOIN PERSON ON ( EVENT_PERSON.xid_person = PERSON.id ) ";
328    }
329    sql += QString("WHERE EVENT.xid_conference = %1 AND (").arg( aConferenceId );
330
331    QStringList searchKeywords = aKeyword.trimmed().split(QRegExp("\\s+"));
332    QStringList whereAnd;
333    for (int i=0; i < searchKeywords.count(); i++) {
334        QStringList whereOr;
335        foreach (QString table, aColumns.uniqueKeys()) {
336            foreach (QString column, aColumns.values(table)){
337                 whereOr.append(QString("%1.%2 LIKE '\%' || :%1%2%3 || '\%'").arg(table).arg(column).arg(i));
338            }
339        }
340        whereAnd.append(whereOr.join(" OR "));
341    }
342    sql += whereAnd.join(") AND (");
343    sql += QString(")");
344
345    QSqlQuery query(db);
346    query.prepare(sql);
347    for (int i = 0; i != searchKeywords.size(); ++i) {
348        QString keyword = searchKeywords[i];
349        foreach (QString table, aColumns.uniqueKeys()) {
350            foreach (QString column, aColumns.values(table)) {
351                query.bindValue(QString(":%1%2%3").arg(table).arg(column).arg(i), keyword );
352            }
353        }
354    }
355
356    if( !query.exec() ){
357       qDebug() << "Could not execute search query: " << query.lastError().text();
358       return -1;
359    }
360
361    return 1;
362}
363
364bool SqlEngine::beginTransaction()
365{
366    QSqlDatabase db = QSqlDatabase::database();
367
368    return execQuery(db, "BEGIN IMMEDIATE TRANSACTION");
369}
370
371bool SqlEngine::commitTransaction()
372{
373    QSqlDatabase db = QSqlDatabase::database();
374
375    return execQuery(db, "COMMIT");
376}
377
378void SqlEngine::deleteConference(int id)
379{
380    QSqlDatabase db = QSqlDatabase::database();
381
382    if ( !db.isValid() || !db.isOpen()) {
383        return;
384    }
385
386    beginTransaction();
387
388    QHash<QString, QVariant> params;
389    params["xid_conference"] = id;
390    execQueryWithParameter(db, "DELETE FROM LINK WHERE xid_conference = :xid_conference", params);
391    execQueryWithParameter(db, "DELETE FROM EVENT_ROOM WHERE xid_conference = :xid_conference", params);
392    execQueryWithParameter(db, "DELETE FROM EVENT_PERSON WHERE xid_conference = :xid_conference", params);
393    execQueryWithParameter(db, "DELETE FROM EVENT WHERE xid_conference = :xid_conference", params);
394    execQueryWithParameter(db, "DELETE FROM ROOM WHERE xid_conference = :xid_conference", params);
395    execQueryWithParameter(db, "DELETE FROM PERSON WHERE xid_conference = :xid_conference", params);
396    execQueryWithParameter(db, "DELETE FROM TRACK WHERE xid_conference = :xid_conference", params);
397    execQueryWithParameter(db, "DELETE FROM CONFERENCE WHERE id = :xid_conference", params);
398
399    commitTransaction();
400}
401
402bool SqlEngine::execQuery(QSqlDatabase &aDatabase, const QString &aQuery)
403{
404    QSqlQuery sqlQuery(aDatabase);
405    if( !sqlQuery.exec(aQuery) ){
406       qDebug() << "SQL ERR: " << sqlQuery.lastError().number() << ", " << sqlQuery.lastError().text();
407       return false;
408    }
409    return true;
410}
411
412bool SqlEngine::execQueryWithParameter(QSqlDatabase &aDatabase, const QString &aQuery, const QHash<QString, QVariant>& params)
413{
414    QSqlQuery sqlQuery(aDatabase);
415    sqlQuery.prepare(aQuery);
416    foreach (QString param_key, params.keys()) {
417        sqlQuery.bindValue(param_key, params[param_key]);
418    }
419    if( !sqlQuery.exec() ){
420       qDebug() << "SQL ERR: " << sqlQuery.lastError().number() << ", " << sqlQuery.lastError().text();
421       return false;
422    }
423    return true;
424}
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