refactor: rename to gpcommon

gpcommon/src/cmd/mod.rs

@@ -0,0 +1,54 @@
+use crate::{response::ResponseData, server::ServerContext};
+use async_trait::async_trait;
+use core::fmt::Debug;
+use std::{
+    fmt::{self, Display},
+    sync::Arc,
+};
+
+mod connect;
+mod disconnect;
+mod status;
+
+pub use connect::Connect;
+pub use disconnect::Disconnect;
+pub use status::Status;
+
+#[derive(Debug)]
+pub(crate) struct CommandContext {
+    server_context: Arc<ServerContext>,
+}
+
+impl From<Arc<ServerContext>> for CommandContext {
+    fn from(server_context: Arc<ServerContext>) -> Self {
+        Self { server_context }
+    }
+}
+
+#[derive(Debug)]
+pub(crate) struct CommandError {
+    message: String,
+}
+
+impl From<String> for CommandError {
+    fn from(message: String) -> Self {
+        Self { message }
+    }
+}
+
+impl Display for CommandError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "CommandError {:#?}", self.message)
+    }
+}
+
+#[async_trait]
+pub(crate) trait Command: Send + Sync {
+    async fn handle(&self, context: CommandContext) -> Result<ResponseData, CommandError>;
+}
+
+impl Debug for dyn Command {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "Command")
+    }
+}