start defining update tasks

src/model.rs

@@ -3,7 +3,9 @@ use crate::*;
 mod column;   pub use self::column::*;
 mod entry;    pub use self::entry::*;
 mod metadata; pub use self::metadata::*;
+mod task;     pub use self::task::*;
 
+/// The application state.
 pub struct Taggart {
     pub _root:   PathBuf,
     pub entries: Vec<Entry>,
@@ -13,6 +15,7 @@ pub struct Taggart {
     pub columns: Columns<Entry, fn(&Entry)->Option<Arc<str>>, fn(&mut [Entry], usize, &str)>,
     pub display: Measure<TuiOut>,
     pub editing: Option<(usize, String)>,
+    pub tasks:   Vec<Task>,
 }
 
 impl Taggart {
@@ -25,6 +28,7 @@ impl Taggart {
             display: Measure::new(),
             editing: None,
             columns: Columns::default(),
+            tasks:   vec![],
             entries,
         })
     }

src/model/task.rs

@@ -0,0 +1,20 @@
+use crate::*;
+use lofty::tag::TagItem;
+
+/// An update to a file's metadata to be performed.
+pub struct Task {
+    pub path: PathBuf,
+    pub item: TagItem
+}
+
+impl Task {
+    fn new (path: &impl AsRef<Path>, item: TagItem) -> Self {
+        Self {
+            path: path.as_ref().into(),
+            item
+        }
+    }
+    fn apply (&self) -> Usually<()> {
+        todo!("apply {:?} to {:?}", self.item, self.path)
+    }
+}