Add Viewer Trait

libimagentryview/src/viewer.rs

@@ -0,0 +1,17 @@
+use libimagstore::store::Entry;
+
+use result::Result;
+
+pub trait Viewer {
+
+    fn view_entry(&self, e: &Entry) -> Result<()>;
+
+    fn view_entries<I: Iterator<Item = Entry>>(&self, entries: I) -> Result<()> {
+        for entry in entries {
+            if let Err(e) = self.view_entry(&entry) {
+                return Err(e);
+            }
+        }
+        Ok(())
+    }
+}