1 files changed, 78 insertions, 0 deletions
diff --git a/src/businesssenders.cpp b/src/businesssenders.cpp
new file mode 100644
index 0000000..13a9374
--- /dev/null
+++ b/src/businesssenders.cpp
@@ -0,0 +1,78 @@
+/*
+ * 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 "businesssenders.h"
+
+#include <QDir>
+#include <QFile>
+#include <QStandardPaths>
+#include <QTextStream>
+
+namespace BusinessSenders {
+
+List parse(const QString &contents)
+{
+    List list;
+    const QStringList lines = contents.split(QLatin1Char('\n'));
+    for (const QString &raw : lines) {
+        const QString line = raw.trimmed();
+        // A commented entry is the reject gesture: it stays in the file so it
+        // is never proposed again, and it is not applied.
+        if (line.isEmpty() || line.startsWith(QLatin1Char('#')))
+            continue;
+
+        const QString entry = line.toLower();
+        if (entry.startsWith(QLatin1Char('@')))
+            list.domains.insert(entry.mid(1));
+        else
+            list.addresses.insert(entry);
+    }
+    return list;
+}
+
+List load(const QString &path)
+{
+    QFile file(path);
+    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
+        return List();
+    return parse(QString::fromUtf8(file.readAll()));
+}
+
+bool contains(const List &list, const QString &address)
+{
+    const QString lowered = address.trimmed().toLower();
+    if (lowered.isEmpty())
+        return false;
+    if (list.addresses.contains(lowered))
+        return true;
+
+    const int at = lowered.indexOf(QLatin1Char('@'));
+    if (at < 0)
+        return false;
+    return list.domains.contains(lowered.mid(at + 1));
+}
+
+QString defaultPath()
+{
+    const QString base = QStandardPaths::writableLocation(
+        QStandardPaths::GenericConfigLocation);
+    return QDir(base).filePath(
+        QStringLiteral("qtmaildir/business-senders"));
+}
+
+} // namespace BusinessSenders