basic get / set / delete / has

src/handler.rs

@@ -0,0 +1,25 @@
+use crate::{Result, connection::Connection, database::Database};
+
+#[derive(Debug)]
+pub struct Handler {
+    db: Database,
+    connection: Connection,
+}
+
+impl Handler {
+    pub fn new(db: Database, connection: Connection) -> Self {
+        Self { db, connection }
+    }
+
+    pub async fn run(&mut self) -> Result<()> {
+        while let Ok(command) = self.connection.read_command().await {
+            let Some(command) = command else {
+                break;
+            };
+
+            command.execute(&self.db, &mut self.connection).await?;
+        }
+
+        Ok(())
+    }
+}