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+use serde::{Serialize, de::DeserializeOwned};
+use std::any::{Any, TypeId};
+use std::collections::HashMap;
+use std::sync::Arc;
+use tcp_connection::{error::TcpTargetError, instance::ConnectionInstance};
+use tokio::{net::TcpStream, sync::Mutex};
+
+/// # Trait - Action<Args, Return>
+///
+/// A trait used to describe the interaction pattern between client and server
+///
+/// ## Generics
+///
+/// Args: Represents the parameter type required for this action
+///
+/// Return: Represents the return type of this action
+///
+/// The above generics must implement serde's Serialize and DeserializeOwned traits,
+/// and must be sendable between threads
+///
+/// ## Implementation
+///
+/// ```ignore
+/// pub trait Action<Args, Return>
+/// where
+/// Args: Serialize + DeserializeOwned + Send,
+/// Return: Serialize + DeserializeOwned + Send,
+/// {
+/// /// Name, used to inform the server which action to execute
+/// fn action_name() -> &'static str;
+///
+/// /// Whether it's a local Action, used to inform the system if it only runs locally
+/// fn is_remote_action() -> bool;
+///
+/// /// Action processing logic
+/// fn process(
+/// context: ActionContext,
+/// args: Args,
+/// ) -> impl std::future::Future<Output = Result<Return, TcpTargetError>> + Send;
+/// }
+/// ```
+pub trait Action<Args, Return>
+where
+ Args: Serialize + DeserializeOwned + Send,
+ Return: Serialize + DeserializeOwned + Send,
+{
+ fn action_name() -> &'static str;
+
+ fn is_remote_action() -> bool;
+
+ fn process(
+ context: ActionContext,
+ args: Args,
+ ) -> impl std::future::Future<Output = Result<Return, TcpTargetError>> + Send;
+}
+
+/// # Struct - ActionContext
+///
+/// Used to inform the Action about the current execution environment
+///
+/// ## Creation
+///
+/// Create ActionContext using the following methods:
+///
+/// ```ignore
+///
+/// // The instance here is the connection instance passed from external sources for communicating with the server
+/// // For specific usage, please refer to the `/crates/utils/tcp_connection` section
+///
+/// fn init_local_action_ctx(instance: ConnectionInstance) {
+/// // Create context and specify execution on local
+/// let mut ctx = ActionContext::local();
+/// }
+///
+/// fn init_remote_action_ctx(instance: ConnectionInstance) {
+/// // Create context and specify execution on remote
+/// let mut ctx = ActionContext::remote();
+/// }
+#[derive(Default)]
+pub struct ActionContext {
+ /// Whether the action is executed locally or remotely
+ proc_on_local: bool,
+
+ /// Whether the action being executed in the current context is a remote action
+ is_remote_action: bool,
+
+ /// The name of the action being executed
+ action_name: String,
+
+ /// The JSON-serialized arguments for the action
+ action_args_json: String,
+
+ /// The connection instance in the current context,
+ instance: Option<Arc<Mutex<ConnectionInstance>>>,
+
+ /// Generic data storage for arbitrary types
+ data: HashMap<TypeId, Arc<dyn Any + Send + Sync>>,
+}
+
+impl ActionContext {
+ /// Generate local context
+ pub fn local() -> Self {
+ ActionContext {
+ proc_on_local: true,
+ ..Default::default()
+ }
+ }
+
+ /// Generate remote context
+ pub fn remote() -> Self {
+ ActionContext {
+ proc_on_local: false,
+ ..Default::default()
+ }
+ }
+
+ /// Build connection instance from TcpStream
+ pub fn build_instance(mut self, stream: TcpStream) -> Self {
+ self.instance = Some(Arc::new(Mutex::new(ConnectionInstance::from(stream))));
+ self
+ }
+
+ /// Insert connection instance into context
+ pub fn insert_instance(mut self, instance: ConnectionInstance) -> Self {
+ self.instance = Some(Arc::new(Mutex::new(instance)));
+ self
+ }
+
+ /// Pop connection instance from context
+ pub fn pop_instance(&mut self) -> Option<Arc<Mutex<ConnectionInstance>>> {
+ self.instance.take()
+ }
+}
+
+impl ActionContext {
+ /// Whether the action is executed locally
+ pub fn is_proc_on_local(&self) -> bool {
+ self.proc_on_local
+ }
+
+ /// Whether the action is executed remotely
+ pub fn is_proc_on_remote(&self) -> bool {
+ !self.proc_on_local
+ }
+
+ /// Whether the action being executed in the current context is a remote action
+ pub fn is_remote_action(&self) -> bool {
+ self.is_remote_action
+ }
+
+ /// Set whether the action being executed in the current context is a remote action
+ pub fn set_is_remote_action(&mut self, is_remote_action: bool) {
+ self.is_remote_action = is_remote_action;
+ }
+
+ /// Get the connection instance in the current context
+ pub fn instance(&self) -> &Option<Arc<Mutex<ConnectionInstance>>> {
+ &self.instance
+ }
+
+ /// Get a mutable reference to the connection instance in the current context
+ pub fn instance_mut(&mut self) -> &mut Option<Arc<Mutex<ConnectionInstance>>> {
+ &mut self.instance
+ }
+
+ /// Get the action name from the context
+ pub fn action_name(&self) -> &str {
+ &self.action_name
+ }
+
+ /// Get the action arguments from the context
+ pub fn action_args_json(&self) -> &String {
+ &self.action_args_json
+ }
+
+ /// Set the action name in the context
+ pub fn set_action_name(mut self, action_name: String) -> Self {
+ self.action_name = action_name;
+ self
+ }
+
+ /// Set the action arguments in the context
+ pub fn set_action_args(mut self, action_args: String) -> Self {
+ self.action_args_json = action_args;
+ self
+ }
+
+ /// Insert arbitrary data in the context
+ pub fn with_data<T: Any + Send + Sync>(mut self, value: T) -> Self {
+ self.data.insert(TypeId::of::<T>(), Arc::new(value));
+ self
+ }
+
+ /// Insert arbitrary data as Arc in the context
+ pub fn with_arc_data<T: Any + Send + Sync>(mut self, value: Arc<T>) -> Self {
+ self.data.insert(TypeId::of::<T>(), value);
+ self
+ }
+
+ /// Insert arbitrary data in the context
+ pub fn insert_data<T: Any + Send + Sync>(&mut self, value: T) {
+ self.data.insert(TypeId::of::<T>(), Arc::new(value));
+ }
+
+ /// Insert arbitrary data as Arc in the context
+ pub fn insert_arc_data<T: Any + Send + Sync>(&mut self, value: Arc<T>) {
+ self.data.insert(TypeId::of::<T>(), value);
+ }
+
+ /// Get arbitrary data from the context
+ pub fn get<T: Any + Send + Sync>(&self) -> Option<&T> {
+ self.data
+ .get(&TypeId::of::<T>())
+ .and_then(|arc| arc.downcast_ref::<T>())
+ }
+
+ /// Get arbitrary data as Arc from the context
+ pub fn get_arc<T: Any + Send + Sync>(&self) -> Option<Arc<T>> {
+ self.data
+ .get(&TypeId::of::<T>())
+ .and_then(|arc| Arc::clone(arc).downcast::<T>().ok())
+ }
+
+ /// Remove and return arbitrary data from the context
+ pub fn remove<T: Any + Send + Sync>(&mut self) -> Option<Arc<T>> {
+ self.data
+ .remove(&TypeId::of::<T>())
+ .and_then(|arc| arc.downcast::<T>().ok())
+ }
+
+ /// Check if the context contains data of a specific type
+ pub fn contains<T: Any + Send + Sync>(&self) -> bool {
+ self.data.contains_key(&TypeId::of::<T>())
+ }
+
+ /// Take ownership of the context and extract data of a specific type
+ pub fn take<T: Any + Send + Sync>(mut self) -> (Self, Option<Arc<T>>) {
+ let value = self
+ .data
+ .remove(&TypeId::of::<T>())
+ .and_then(|arc| arc.downcast::<T>().ok());
+ (self, value)
+ }
+}