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/*
* Copyright 2014 Christian Mollekopf <mollekopf@kolabsys.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "collectionindexer.h"
#include <QString>
#include <QStringList>
#include <xapian.h>
#include <xapian/database.h>
#include <xapian/query.h>
#include <xapian/enquire.h>
#include <xapian/termgenerator.h>
#include <AkonadiCore/collectionidentificationattribute.h>
#include <AkonadiCore/AttributeFactory>
#include <xapiandocument.h>
#include "akonadi_indexer_agent_debug.h"
CollectionIndexer::CollectionIndexer(const QString &path)
{
Akonadi::AttributeFactory::registerAttribute<Akonadi::CollectionIdentificationAttribute>();
try {
m_db = new Xapian::WritableDatabase(path.toUtf8().constData(), Xapian::DB_CREATE_OR_OPEN);
} catch (const Xapian::DatabaseCorruptError &err) {
qCCritical(AKONADI_INDEXER_AGENT_LOG) << "Database Corrupted - What did you do?";
qCCritical(AKONADI_INDEXER_AGENT_LOG) << err.get_error_string();
m_db = 0;
} catch (const Xapian::Error &e) {
qCCritical(AKONADI_INDEXER_AGENT_LOG) << QString::fromStdString(e.get_type()) << QString::fromStdString(e.get_description());
m_db = 0;
}
}
CollectionIndexer::~CollectionIndexer()
{
commit();
delete m_db;
}
static QByteArray getPath(const Akonadi::Collection &collection)
{
QStringList pathParts;
pathParts << collection.displayName();
Akonadi::Collection col = collection;
while (col.parentCollection().isValid() && (col.parentCollection() != Akonadi::Collection::root())) {
col = col.parentCollection();
pathParts.prepend(col.displayName());
}
return "/" + pathParts.join(QStringLiteral("/")).toUtf8();
}
void CollectionIndexer::index(const Akonadi::Collection &collection)
{
if (!m_db) {
return;
}
//qCDebug(AKONADI_INDEXER_AGENT_LOG) << "Indexing " << collection.id() << collection.displayName() << collection.name();
try {
Xapian::Document doc;
Xapian::TermGenerator gen;
gen.set_document(doc);
gen.set_database(*m_db);
gen.index_text_without_positions(collection.displayName().toUtf8().constData());
gen.index_text_without_positions(collection.displayName().toUtf8().constData(), 1, "N");
//We index with positions so we can do phrase searches (required for exact matches)
{
const QByteArray path = getPath(collection);
gen.index_text(path.constData(), 1, "P");
const QByteArray term = "A" + path;
doc.add_term(term.constData());
}
Akonadi::Collection::Id colId = collection.parentCollection().id();
const QByteArray term = 'C' + QByteArray::number(colId);
doc.add_boolean_term(term.constData());
QByteArray ns;
if (Akonadi::CollectionIdentificationAttribute *folderAttribute = collection.attribute<Akonadi::CollectionIdentificationAttribute>()) {
if (!folderAttribute->collectionNamespace().isEmpty()) {
ns = folderAttribute->collectionNamespace();
}
if (!folderAttribute->identifier().isEmpty()) {
const QByteArray term = "ID" + folderAttribute->identifier();
doc.add_boolean_term(term.constData());
}
}
{
//We must add the term also with an empty namespace, so we can search for that as well
const QByteArray term = "NS" + ns;
doc.add_boolean_term(term.constData());
}
Q_FOREACH (const QString &mt, collection.contentMimeTypes()) {
const QByteArray term = "M" + mt.toUtf8();
doc.add_boolean_term(term.constData());
}
m_db->replace_document(collection.id(), doc);
} catch (const Xapian::Error &e) {
qCWarning(AKONADI_INDEXER_AGENT_LOG) << "Xapian error in indexer:" << e.get_msg().c_str();
}
}
void CollectionIndexer::change(const Akonadi::Collection &col)
{
index(col);
}
void CollectionIndexer::remove(const Akonadi::Collection &col)
{
if (!m_db) {
return;
}
//Remove collection
try {
m_db->delete_document(col.id());
} catch (const Xapian::Error &e) {
qCWarning(AKONADI_INDEXER_AGENT_LOG) << "Xapian error in indexer:" << e.get_msg().c_str();
}
//Remove subcollections
try {
Xapian::Query query('C' + QString::number(col.id()).toStdString());
Xapian::Enquire enquire(*m_db);
enquire.set_query(query);
Xapian::MSet mset = enquire.get_mset(0, m_db->get_doccount());
Xapian::MSetIterator end = mset.end();
for (Xapian::MSetIterator it = mset.begin(); it != end; ++it) {
const qint64 id = *it;
remove(Akonadi::Collection(id));
}
} catch (const Xapian::DocNotFoundError &) {
return;
}
}
void CollectionIndexer::move(const Akonadi::Collection &collection,
const Akonadi::Collection &from,
const Akonadi::Collection &to)
{
index(collection);
}
void CollectionIndexer::commit()
{
if (m_db) {
m_db->commit();
}
}
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