refactor: 优化数据库初始化与 WOL 存储

src/db/wol_history.rs

@@ -0,0 +1,39 @@
+use sqlx::{Pool, Sqlite};
+
+use crate::error::Result;
+
+const MAX_ENTRIES: i64 = 50;
+
+#[derive(Clone)]
+pub struct WolHistoryStore {
+    pool: Pool<Sqlite>,
+}
+
+impl WolHistoryStore {
+    pub(crate) fn new(pool: Pool<Sqlite>) -> Self {
+        Self { pool }
+    }
+
+    pub async fn record(&self, mac_address: &str) -> Result<()> {
+        let mut tx = self.pool.begin().await?;
+        sqlx::query("INSERT INTO wol_history (mac_address, updated_at) VALUES (?1, CAST(strftime('%s', 'now') AS INTEGER)) ON CONFLICT(mac_address) DO UPDATE SET updated_at = excluded.updated_at")
+            .bind(mac_address)
+            .execute(&mut *tx)
+            .await?;
+        sqlx::query("DELETE FROM wol_history WHERE mac_address NOT IN (SELECT mac_address FROM wol_history ORDER BY updated_at DESC LIMIT ?1)")
+            .bind(MAX_ENTRIES)
+            .execute(&mut *tx)
+            .await?;
+        tx.commit().await?;
+        Ok(())
+    }
+
+    pub async fn list(&self, limit: usize) -> Result<Vec<(String, i64)>> {
+        Ok(sqlx::query_as(
+            "SELECT mac_address, updated_at FROM wol_history ORDER BY updated_at DESC LIMIT ?1",
+        )
+        .bind(limit as i64)
+        .fetch_all(&self.pool)
+        .await?)
+    }
+}