Make unshell-lib, and module system with components.

unshell-lib/src/lib.rs

@@ -0,0 +1,45 @@
+#![no_main]
+#[macro_use]
+extern crate log;
+
+pub mod client;
+pub mod module;
+pub mod server;
+
+mod announcement;
+use std::sync::{Arc, Mutex};
+
+pub use announcement::Announcement;
+
+use crate::module::{Interface, Manager};
+
+///Generic error type for module-related operations.
+#[derive(Debug)]
+pub enum ModuleError {
+    LibLoadingError(libloading::Error),
+    LogError(log::SetLoggerError),
+    LinkError(String),
+    Error(String),
+}
+
+/// Trait for defining modules that have a runtime.
+pub trait ModuleRuntime: Send {
+    /// Returns true if the module is running.
+    /// After returning false, the module will be dropped.
+    fn is_running(&self) -> bool;
+    /// Consumes the module, implementation should kill whatever is running.
+    fn kill(self: Box<Self>);
+}
+
+pub trait Component {
+    fn name(&self) -> &'static str;
+    fn start_runtime(&self, manager: Arc<Mutex<Manager>>) -> Option<Box<dyn ModuleRuntime>>;
+    fn get_interface(&self) -> Box<dyn Interface>;
+    fn clone_box(&self) -> Box<dyn Component>;
+}
+
+impl Clone for Box<dyn Component> {
+    fn clone(&self) -> Box<dyn Component> {
+        self.clone_box()
+    }
+}