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// =============================================================================
// #######
// ### ### F: command.rs
// ## ## ## ## P: AppCore-Runtime
// ## ##
// C: 2026/05/29 20:47:35 by dnettoRaw
// ## ## ## ## U: 2026/06/04 11:51:29 by dnettoRaw
// ########### S: 0.6.0
// =============================================================================
//! Command contract and ordered, duplicate-safe command registry.
//! Command payload transport uses `CommandEnvelope`.
//! Handler contract lives in `handler.rs`.
use crate::error::RuntimeResult;
use crate::ids::CommandName;
use crate::registry::NameRegistry;
/// Minimal runtime command contract.
pub trait RuntimeCommand {
/// Returns the stable command name used for registration and dispatch.
fn name(&self) -> &CommandName;
}
/// Ordered registry of declared command names.
#[derive(Debug, Default)]
pub struct CommandRegistry {
names: NameRegistry<CommandName>,
}
impl CommandRegistry {
/// Creates an empty command registry.
pub fn new() -> Self {
Self::default()
}
/// Registers a command name, rejecting duplicates.
pub fn register(&mut self, name: CommandName) -> RuntimeResult<()> {
self.names.register(name, "command")
}
/// Reports whether a command name is registered.
pub fn contains(&self, name: &CommandName) -> bool {
self.names.contains(name)
}
/// Returns the number of registered command names.
pub fn len(&self) -> usize {
self.names.len()
}
/// Reports whether no command names are registered.
pub fn is_empty(&self) -> bool {
self.names.is_empty()
}
/// Returns command names in registration order.
pub fn list(&self) -> &[CommandName] {
self.names.list()
}
}
#[cfg(test)]
#[path = "command_tests.rs"]
mod tests;