Add LineLister

libimagentrylist/src/listers/line.rs

@@ -0,0 +1,40 @@
+use std::io::stdout;
+use std::io::Write;
+use std::ops::Deref;
+
+use lister::Lister;
+use result::Result;
+
+use libimagstore::store::FileLockEntry;
+use libimagstore::store::Entry;
+
+pub struct LineLister<'a> {
+    lister: &'a Fn(&Entry) -> String,
+}
+
+impl<'a> LineLister<'a> {
+
+    pub fn new(lister: &'a Fn(&Entry) -> String) -> LineLister<'a> {
+        LineLister {
+            lister: lister,
+        }
+    }
+
+}
+
+impl<'a> Lister for LineLister<'a> {
+
+    fn list<'b, I: Iterator<Item = FileLockEntry<'b>>>(&self, entries: I) -> Result<()> {
+        use error::ListError as LE;
+        use error::ListErrorKind as LEK;
+
+        entries.fold(Ok(()), |accu, entry| {
+            accu.and_then(|_| {
+                    write!(stdout(), "{:?}\n", (self.lister)(entry.deref()))
+                        .map_err(|e| LE::new(LEK::FormatError, Some(Box::new(e))))
+                })
+            })
+    }
+
+}
+

libimagentrylist/src/listers/mod.rs

@@ -1 +1,2 @@
+pub mod line;
 pub mod path;