diff --git a/libimagdiary/src/is_in_diary.rs b/libimagdiary/src/is_in_diary.rs
new file mode 100644
index 00000000..0d0cfccb
--- /dev/null
+++ b/libimagdiary/src/is_in_diary.rs
@@ -0,0 +1,26 @@
+use std::path::PathBuf;
+
+use libimagstore::store::Entry;
+
+pub trait IsInDiary {
+
+    fn is_in_diary(&self, name: &str) -> bool;
+
+}
+
+impl IsInDiary for Entry {
+
+    fn is_in_diary(&self, name: &str) -> bool {
+        self.get_location().is_in_diary(name)
+    }
+
+}
+
+impl IsInDiary for PathBuf {
+
+    fn is_in_diary(&self, name: &str) -> bool {
+        self.to_str().map(|s| s.contains(name)).unwrap_or(false)
+    }
+
+}
+