feat(rulequery): compile a single term

1 files changed, 65 insertions, 0 deletions

diff --git a/src/rulequery.cpp b/src/rulequery.cpp
new file mode 100644
index 0000000..f80e6c4
--- /dev/null
+++ b/src/rulequery.cpp
@@ -0,0 +1,65 @@
+/*
+ * 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 "rulequery.h"
+
+namespace {
+
+/// The notmuch prefix each field compiles to. Wire format, never translated.
+QString prefixFor(RuleTerm::Field field)
+{
+    switch (field) {
+    case RuleTerm::From:       return QStringLiteral("from");
+    case RuleTerm::To:         return QStringLiteral("to");
+    case RuleTerm::Cc:         return QStringLiteral("cc");
+    case RuleTerm::Subject:    return QStringLiteral("subject");
+    case RuleTerm::Tag:        return QStringLiteral("tag");
+    case RuleTerm::Folder:     return QStringLiteral("path");
+    case RuleTerm::Attachment: return QStringLiteral("attachment");
+    case RuleTerm::Date:       return QStringLiteral("date");
+    }
+    return QString();
+}
+
+} // namespace
+
+bool operator==(const RuleTerm &a, const RuleTerm &b)
+{
+    return a.field == b.field && a.op == b.op && a.value == b.value;
+}
+
+bool operator==(const RuleQuery &a, const RuleQuery &b)
+{
+    return a.parsed == b.parsed && a.join == b.join
+           && a.terms == b.terms && a.exclusions == b.exclusions;
+}
+
+QString RuleQuery::compile() const
+{
+    if (terms.isEmpty())
+        return QString();
+
+    return prefixFor(terms.first().field) + QLatin1Char(':')
+           + terms.first().value;
+}
+
+RuleQuery RuleQuery::parse(const QString &query)
+{
+    Q_UNUSED(query);
+    return RuleQuery();
+}