Add concept of RefFlags

libimagref/src/flags.rs

@@ -0,0 +1,55 @@
+use std::collections::BTreeMap;
+
+use toml::Value;
+
+use error::RefErrorKind as REK;
+use result::Result;
+
+#[derive(Default)]
+pub struct RefFlags {
+    content_hashing:       bool,
+    permission_tracking:   bool,
+}
+
+impl RefFlags {
+
+    /// Read the RefFlags from a TOML document
+    ///
+    /// Assumes that the whole TOML tree is passed. So this looks up `ref.flags` to get the flags.
+    /// It assumes that this is a Map with Key = <name of the setting> and Value = boolean.
+    pub fn read(v: &Value) -> Result<RefFlags> {
+        unimplemented!()
+    }
+
+    /// Build a TOML::Value from this RefFlags object.
+    ///
+    /// Returns a Map which should be set in `ref.flags` in the header.
+    pub fn into_toml(self) -> Result<Value> {
+        unimplemented!()
+    }
+
+    /// Alias for `RefFlags::content_hashing()`
+    pub fn is_often_moving(mut self, b: bool) -> RefFlags {
+        self.with_content_hashing(b)
+    }
+
+    pub fn with_content_hashing(self, b: bool) -> RefFlags {
+        unimplemented!()
+    }
+
+    pub fn with_permission_tracking(mut self, b: bool) -> RefFlags {
+        self.permission_tracking = b;
+        self
+    }
+
+
+    pub fn get_content_hashing(&self) -> bool {
+        unimplemented!()
+    }
+
+    pub fn get_permission_tracking(&self) -> bool {
+        unimplemented!()
+    }
+
+}
+