1 files changed, 64 insertions, 0 deletions
diff --git a/lib/entry/libimagentryfilter/src/builtin/header/field_isempty.rs b/lib/entry/libimagentryfilter/src/builtin/header/field_isempty.rs
new file mode 100644
index 00000000..7a9c6521
--- /dev/null
+++ b/lib/entry/libimagentryfilter/src/builtin/header/field_isempty.rs
@@ -0,0 +1,64 @@
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; version
+// 2.1 of the License.
+//
+// This library 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+//
+
+use libimagstore::store::Entry;
+use libimagstore::toml_ext::TomlValueExt;
+
+use builtin::header::field_path::FieldPath;
+use filters::filter::Filter;
+
+use toml::Value;
+
+pub struct FieldIsEmpty {
+    header_field_path: FieldPath,
+}
+
+impl FieldIsEmpty {
+
+    pub fn new(path: FieldPath) -> FieldIsEmpty {
+        FieldIsEmpty {
+            header_field_path: path,
+        }
+    }
+
+}
+
+impl Filter<Entry> for FieldIsEmpty {
+
+    fn filter(&self, e: &Entry) -> bool {
+        e.get_header()
+            .read(&self.header_field_path[..])
+            .map(|v| {
+                match v {
+                    Some(Value::Array(a))   => a.is_empty(),
+                    Some(Value::String(s))  => s.is_empty(),
+                    Some(Value::Table(t))   => t.is_empty(),
+                    Some(Value::Boolean(_)) |
+                    Some(Value::Float(_))   |
+                    Some(Value::Integer(_)) => false,
+                    _                       => true,
+                }
+            })
+            .unwrap_or(false)
+    }
+
+}
+
+
+