Introduce QueryInformation to system::Action

native/src/system/action.rs

@@ -1,3 +1,36 @@
+use crate::system;
+
+use iced_futures::MaybeSend;
+
+use std::fmt;
+
 /// An operation to be performed on the system.
-#[derive(Debug)]
-pub enum Action {}
+pub enum Action<T> {
+    /// Query system information and produce `T` with the result.
+    QueryInformation(Box<dyn Fn(Option<system::Information>) -> T>),
+}
+
+impl<T> Action<T> {
+    /// Maps the output of a system [`Action`] using the provided closure.
+    pub fn map<A>(
+        self,
+        f: impl Fn(T) -> A + 'static + MaybeSend + Sync,
+    ) -> Action<A>
+    where
+        T: 'static,
+    {
+        match self {
+            Self::QueryInformation(o) => {
+                Action::QueryInformation(Box::new(move |s| f(o(s))))
+            }
+        }
+    }
+}
+
+impl<T> fmt::Debug for Action<T> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::QueryInformation(_) => write!(f, "Action::QueryInformation"),
+        }
+    }
+}