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/*
* qtmaildir - a Qt6 mail client for notmuch-indexed Maildirs
* Copyright (C) 2026 Danilo M. <danix@danix.xyz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "searchterm.h"
#include "config.h"
#include <algorithm>
namespace SearchTerm {
QString quote(const QString &value)
{
// simplified() collapses every run of whitespace, newlines and tabs
// included, and trims the ends. A selection spanning paragraphs arrives
// full of newlines, which would otherwise reach the query bar verbatim.
QString cleaned = value.simplified();
if (cleaned.isEmpty())
return {};
if (cleaned.size() > kMaxValueLength)
cleaned.truncate(kMaxValueLength);
// notmuch escapes a quote inside a quoted term by DOUBLING it and has no
// backslash escape at all. A backslash-escaped quote ENDS the term, so
// `subject:"x \" or tag:inbox or id:"` let a selection walk out of the
// query it was meant to narrow: measured matching every message under a
// `tag:nomatch and` scope, where the doubled form matched none. A
// backslash is literal to notmuch and is left as it is.
cleaned.replace(QLatin1Char('"'), QStringLiteral("\"\""));
return QLatin1Char('"') + cleaned + QLatin1Char('"');
}
QString field(const QString &name, const QString &value)
{
const QString quoted = quote(value);
if (quoted.isEmpty())
return {};
return name + QLatin1Char(':') + quoted;
}
QString onDate(const QDate &day)
{
if (!day.isValid())
return {};
const QString text = day.toString(QStringLiteral("yyyy-MM-dd"));
return QStringLiteral("date:%1..%1").arg(text);
}
QString tag(const QString &name)
{
const QString trimmed = name.simplified();
if (trimmed.isEmpty())
return {};
// A tag is a token from a vocabulary the user chose, so it reads better
// unquoted in the bar they are about to edit. Quoted only when it holds
// something that would not survive.
const bool needsQuoting =
std::any_of(trimmed.cbegin(), trimmed.cend(), [](QChar ch) {
return !(ch.isLetterOrNumber() || ch == QLatin1Char('-')
|| ch == QLatin1Char('_') || ch == QLatin1Char('.')
|| ch == QLatin1Char('/'));
});
return QStringLiteral("tag:") + (needsQuoting ? quote(trimmed) : trimmed);
}
QString extend(const QString &existing, const QString &addition)
{
const QString left = existing.trimmed();
const QString right = addition.trimmed();
if (right.isEmpty())
return left;
if (left.isEmpty())
return right;
return QStringLiteral("(%1) AND (%2)").arg(left, right);
}
QString exclude(const QString &existing, const QString &addition)
{
const QString left = existing.trimmed();
const QString right = addition.trimmed();
if (right.isEmpty())
return left;
// NOT a replace, unlike extend(): see the header. An empty left would make
// this "everything except", which no right-click asked for.
if (left.isEmpty())
return QString();
return QStringLiteral("(%1) AND NOT (%2)").arg(left, right);
}
QString changes(const QString &query, const QStringList &add,
const QStringList &remove)
{
QStringList terms;
for (const QString &name : add) {
const QString term = tag(name);
if (!term.isEmpty())
terms.append(QStringLiteral("not ") + term);
}
for (const QString &name : remove) {
const QString term = tag(name);
if (!term.isEmpty())
terms.append(term);
}
if (query.trimmed().isEmpty() || terms.isEmpty())
return Config::matchNothingQuery();
return extend(query, terms.join(QStringLiteral(" or ")));
}
} // namespace SearchTerm
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