Add VersionsViewer

libimagentryview/src/builtin/mod.rs

@@ -1,2 +1,3 @@
 pub mod plain;
 pub mod stdout;
+pub mod versions;

libimagentryview/src/builtin/versions.rs

@@ -0,0 +1,54 @@
+use libimagstore::store::Entry;
+use libimagstore::store::Store;
+use libimagerror::into::IntoError;
+
+use viewer::Viewer;
+use result::Result;
+use error::ViewErrorKind as VEK;
+
+pub struct VersionsViewer<'a> {
+    store: &'a Store,
+}
+
+impl<'a> VersionsViewer<'a> {
+
+    pub fn new(store: &'a Store) -> VersionsViewer<'a> {
+        VersionsViewer {
+            store: store,
+        }
+    }
+
+}
+
+impl<'a> Viewer for VersionsViewer<'a> {
+
+    fn view_entry(&self, entr: &Entry) -> Result<()> {
+        use glob::glob;
+
+        entr.get_location()
+            .clone()
+            .storified(self.store)
+            .to_str()
+            .and_then(|s| s.split("~").next())
+            .map(|component| {
+                glob(&format!("{}~*", component)[..])
+                    .map_err(|_| VEK::PatternError.into_error())
+                    .and_then(|paths| {
+                        for entry in paths {
+                            let p = match entry {
+                                Err(_) => return Err(VEK::GlobError.into_error()),
+                                Ok(p) => p,
+                            };
+                            let p = p.file_name()
+                                .and_then(|s| s.to_str())
+                                .unwrap(); // TODO
+                            println!("{}", p);
+                        };
+                        Ok(())
+                    })
+            })
+            .unwrap_or(Err(VEK::PatternBuildingError.into_error()))
+    }
+
+}
+