refactor: Reorganise file structure

Signed-off-by: quexeky <git@quexeky.dev>

src-tauri/src/download_manager/util/download_thread_control_flag.rs

@@ -0,0 +1,49 @@
+use std::sync::{
+    atomic::{AtomicBool, Ordering},
+    Arc,
+};
+
+#[derive(PartialEq, Eq, PartialOrd, Ord)]
+pub enum DownloadThreadControlFlag {
+    Stop,
+    Go,
+}
+/// Go => true
+/// Stop => false
+impl From<DownloadThreadControlFlag> for bool {
+    fn from(value: DownloadThreadControlFlag) -> Self {
+        match value {
+            DownloadThreadControlFlag::Go => true,
+            DownloadThreadControlFlag::Stop => false,
+        }
+    }
+}
+/// true => Go
+/// false => Stop
+impl From<bool> for DownloadThreadControlFlag {
+    fn from(value: bool) -> Self {
+        match value {
+            true => DownloadThreadControlFlag::Go,
+            false => DownloadThreadControlFlag::Stop,
+        }
+    }
+}
+
+#[derive(Clone)]
+pub struct DownloadThreadControl {
+    inner: Arc<AtomicBool>,
+}
+
+impl DownloadThreadControl {
+    pub fn new(flag: DownloadThreadControlFlag) -> Self {
+        Self {
+            inner: Arc::new(AtomicBool::new(flag.into())),
+        }
+    }
+    pub fn get(&self) -> DownloadThreadControlFlag {
+        self.inner.load(Ordering::Relaxed).into()
+    }
+    pub fn set(&self, flag: DownloadThreadControlFlag) {
+        self.inner.store(flag.into(), Ordering::Relaxed);
+    }
+}