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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#ifndef INITDB_H
#define INITDB_H
#include <QDate>
#include <QSqlError>
#include <QSqlQuery>
void addBook(QSqlQuery &q, const QString &title, int year, const QVariant &authorId,
const QVariant &genreId, int rating)
{
q.addBindValue(title);
q.addBindValue(year);
q.addBindValue(authorId);
q.addBindValue(genreId);
q.addBindValue(rating);
q.exec();
}
QVariant addGenre(QSqlQuery &q, const QString &name)
{
q.addBindValue(name);
q.exec();
return q.lastInsertId();
}
QVariant addAuthor(QSqlQuery &q, const QString &name, QDate birthdate)
{
q.addBindValue(name);
q.addBindValue(birthdate);
q.exec();
return q.lastInsertId();
}
const auto BOOKS_SQL = QLatin1String(R"(
create table books(id integer primary key, title varchar, author integer,
genre integer, year integer, rating integer)
)");
const auto AUTHORS_SQL = QLatin1String(R"(
create table authors(id integer primary key, name varchar, birthdate date)
)");
const auto GENRES_SQL = QLatin1String(R"(
create table genres(id integer primary key, name varchar)
)");
const auto INSERT_AUTHOR_SQL = QLatin1String(R"(
insert into authors(name, birthdate) values(?, ?)
)");
const auto INSERT_BOOK_SQL = QLatin1String(R"(
insert into books(title, year, author, genre, rating)
values(?, ?, ?, ?, ?)
)");
const auto INSERT_GENRE_SQL = QLatin1String(R"(
insert into genres(name) values(?)
)");
QSqlError initDb()
{
QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName(":memory:");
if (!db.open())
return db.lastError();
QStringList tables = db.tables();
if (tables.contains("books", Qt::CaseInsensitive)
&& tables.contains("authors", Qt::CaseInsensitive))
return QSqlError();
QSqlQuery q;
if (!q.exec(BOOKS_SQL))
return q.lastError();
if (!q.exec(AUTHORS_SQL))
return q.lastError();
if (!q.exec(GENRES_SQL))
return q.lastError();
if (!q.prepare(INSERT_AUTHOR_SQL))
return q.lastError();
QVariant asimovId = addAuthor(q, QLatin1String("Isaac Asimov"), QDate(1920, 2, 1));
QVariant greeneId = addAuthor(q, QLatin1String("Graham Greene"), QDate(1904, 10, 2));
QVariant pratchettId = addAuthor(q, QLatin1String("Terry Pratchett"), QDate(1948, 4, 28));
if (!q.prepare(INSERT_GENRE_SQL))
return q.lastError();
QVariant sfiction = addGenre(q, QLatin1String("Science Fiction"));
QVariant fiction = addGenre(q, QLatin1String("Fiction"));
QVariant fantasy = addGenre(q, QLatin1String("Fantasy"));
if (!q.prepare(INSERT_BOOK_SQL))
return q.lastError();
addBook(q, QLatin1String("Foundation"), 1951, asimovId, sfiction, 3);
addBook(q, QLatin1String("Foundation and Empire"), 1952, asimovId, sfiction, 4);
addBook(q, QLatin1String("Second Foundation"), 1953, asimovId, sfiction, 3);
addBook(q, QLatin1String("Foundation's Edge"), 1982, asimovId, sfiction, 3);
addBook(q, QLatin1String("Foundation and Earth"), 1986, asimovId, sfiction, 4);
addBook(q, QLatin1String("Prelude to Foundation"), 1988, asimovId, sfiction, 3);
addBook(q, QLatin1String("Forward the Foundation"), 1993, asimovId, sfiction, 3);
addBook(q, QLatin1String("The Power and the Glory"), 1940, greeneId, fiction, 4);
addBook(q, QLatin1String("The Third Man"), 1950, greeneId, fiction, 5);
addBook(q, QLatin1String("Our Man in Havana"), 1958, greeneId, fiction, 4);
addBook(q, QLatin1String("Guards! Guards!"), 1989, pratchettId, fantasy, 3);
addBook(q, QLatin1String("Night Watch"), 2002, pratchettId, fantasy, 3);
addBook(q, QLatin1String("Going Postal"), 2004, pratchettId, fantasy, 3);
return QSqlError();
}
#endif
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