feat: add an "undo" command

This puts a task back in the TODO state.

Some refactoring here lets us reuse the same code for handling both
cmdDo and cmdUndo.

1 files changed, 10 insertions, 2 deletions

diff --git a/cmds.go b/cmds.go
index 5791546..38be692 100644
--- a/cmds.go
+++ b/cmds.go
@@ -43,7 +43,7 @@ func (ctrl controller) cmdAdd(task string) error {
 	})
 }
 
-func (ctrl controller) cmdDo(taskIndex int) error {
+func (ctrl controller) toggleDo(taskIndex int, status bool) error {
 	return ctrl.db.Update(func(tx *bbolt.Tx) error {
 		taskBucket := tx.Bucket(ctrl.tasksBucketName)
 		ttBytes := taskBucket.Get(itob(uint64(taskIndex)))
@@ -53,7 +53,7 @@ func (ctrl controller) cmdDo(taskIndex int) error {
 			return fmt.Errorf("can't unmarshal: %w", err)
 		}
 
-		tt.Done = true
+		tt.Done = status
 
 		buf, err := json.Marshal(tt)
 		if err != nil {
@@ -64,6 +64,14 @@ func (ctrl controller) cmdDo(taskIndex int) error {
 	})
 }
 
+func (ctrl controller) cmdDo(taskIndex int) error {
+	return ctrl.toggleDo(taskIndex, true)
+}
+
+func (ctrl controller) cmdUndo(taskIndex int) error {
+	return ctrl.toggleDo(taskIndex, false)
+}
+
 func (ctrl controller) cmdList() error {
 	return ctrl.db.View(func(tx *bbolt.Tx) error {
 		// Assume bucket exists and has keys