Add module for category handling

lib/entry/libimagentrycategory/src/category.rs

@@ -0,0 +1,47 @@
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015-2018 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 libimagentryutil::isa::Is;
+use libimagentryutil::isa::IsKindHeaderPathProvider;
+
+use error::CategoryError as CE;
+use store::CATEGORY_REGISTER_NAME_FIELD_PATH;
+
+provide_kindflag_path!(pub IsCategory, "category.is_category");
+
+pub trait Category {
+    fn is_category(&self)                   -> Result<bool>;
+    fn get_name(&self)                      -> Result<String>;
+    fn get_entries(&self, store: &Store)    -> Result<StoreIdIterator>;
+}
+
+impl Category for Entry {
+    fn is_category(&self) -> Result<bool> {
+        self.is::<IsCategory>().map_err(CE::from)
+    }
+
+    fn get_name(&self) -> Result<String> {
+        self.get_header().read_string(CATEGORY_REGISTER_NAME_FIELD_PATH).map_err(CE::from)
+    }
+
+    fn get_entries(&self, store: &Store) -> Result<CategoryIdIterator> {
+        unimplemented!()
+    }
+}
+

lib/entry/libimagentrycategory/src/lib.rs

@@ -47,6 +47,7 @@ extern crate libimagerror;
 #[macro_use]
 extern crate libimagstore;
 
+pub mod category;
 pub mod entry;
 pub mod error;
 pub mod register;