perf: cache for players scraping

sdgb-cli/src/cache/mod.rs

@@ -0,0 +1,25 @@
+use std::sync::LazyLock;
+
+use redb::{Table, TableDefinition, WriteTransaction};
+
+static DATABASE: LazyLock<redb::Database> = LazyLock::new(|| {
+    redb::Database::builder()
+        .create("players.redb")
+        .expect("failed to open database")
+});
+const DIFINITION: TableDefinition<'_, u32, Vec<u8>> = redb::TableDefinition::new("players");
+
+pub fn write_txn() -> Result<WriteTransaction, redb::Error> {
+    Ok(DATABASE.begin_write()?)
+}
+
+pub fn open_table(write: &WriteTransaction) -> Result<Table<'_, u32, Vec<u8>>, redb::Error> {
+    Ok(write.open_table(DIFINITION)?)
+}
+
+pub fn init_db() -> Result<(), redb::Error> {
+    let write_txn = DATABASE.begin_write()?;
+    write_txn.open_table(DIFINITION)?;
+    write_txn.commit()?;
+    Ok(())
+}