2 files changed, 16 insertions, 0 deletions

diff --git a/common/storage.h b/common/storage.h
index 22bf06c..daeace8 100644
--- a/common/storage.h
+++ b/common/storage.h
@@ -90,6 +90,11 @@ public:
                         const std::function<void(const QByteArray &key, const QByteArray &value)> &resultHandler,
                         const std::function<void(const Storage::Error &error)> &errorHandler = std::function<void(const Storage::Error &error)>()) const;
 
+        /**
+         * Returns true if the database contains the substring key.
+         */
+        bool contains(const QByteArray &uid);
+
         NamedDatabase(NamedDatabase&& other) : d(other.d)
         {
             d = other.d;
diff --git a/common/storage_common.cpp b/common/storage_common.cpp
index 1dbc178..10870d4 100644
--- a/common/storage_common.cpp
+++ b/common/storage_common.cpp
@@ -158,4 +158,15 @@ QByteArray Storage::uidFromKey(const QByteArray &key)
     return key.mid(0, 38);
 }
 
+bool Storage::NamedDatabase::contains(const QByteArray &uid)
+{
+    bool found = false;
+    scan(uid, [&found](const QByteArray &, const QByteArray &) -> bool {
+        found = true;
+        return false;
+    }, [this](const Akonadi2::Storage::Error &error) {
+    }, true);
+    return found;
+}
+
 } // namespace Akonadi2