mirror of
https://github.com/MedzikUser/servers
synced 2024-08-14 23:57:48 +00:00
106 lines
3 KiB
Rust
106 lines
3 KiB
Rust
|
use std::{any::Any, fs, sync::Arc};
|
||
|
|
||
|
use libloading::{Library, Symbol};
|
||
|
use log::{debug, trace};
|
||
|
|
||
|
use crate::Client;
|
||
|
|
||
|
/// A plugin which allows you to add extra functionality.
|
||
|
pub trait Plugin: Any + Send + Sync {
|
||
|
/// Get a name describing the `Plugin`.
|
||
|
fn name(&self) -> &'static str;
|
||
|
/// A function that runs immediately after plugin loading.
|
||
|
/// Usually used for initialization.
|
||
|
fn on_plugin_load(&self);
|
||
|
/// A function that runs immediately before the plugin is unloaded.
|
||
|
/// Use this if you want to do any cleanup.
|
||
|
fn on_plugin_unload(&self);
|
||
|
/// Plugin command.
|
||
|
/// For example: `/command`
|
||
|
fn command(&self) -> &'static str;
|
||
|
/// Help message of this command.
|
||
|
fn help(&self) -> &'static str;
|
||
|
/// The function will be executed, when sending plugin command.
|
||
|
fn execute(&self, client: &mut Client, args: Vec<&str>);
|
||
|
}
|
||
|
|
||
|
pub struct PluginManager {
|
||
|
/// Vector with loaded plugins
|
||
|
pub plugins: Vec<Box<dyn Plugin>>,
|
||
|
}
|
||
|
|
||
|
impl PluginManager {
|
||
|
/// Create empty `PluginManager`
|
||
|
pub fn new() -> Self {
|
||
|
Self {
|
||
|
plugins: Vec::new(),
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/// Unload all plugins and loaded plugin libraries, making sure to fire
|
||
|
/// their `on_plugin_unload()` methods so they can do any necessary cleanup.
|
||
|
pub fn unload(&mut self) {
|
||
|
debug!("Unloading plugins");
|
||
|
|
||
|
for plugin in self.plugins.drain(..) {
|
||
|
trace!("Firing on_plugin_unload for {:?}", plugin.name());
|
||
|
plugin.on_plugin_unload();
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
impl Default for PluginManager {
|
||
|
fn default() -> Self {
|
||
|
Self::new()
|
||
|
}
|
||
|
}
|
||
|
|
||
|
pub trait PluginRegistrar {
|
||
|
fn register_plugin(&mut self, plugin: Box<dyn Plugin>);
|
||
|
}
|
||
|
|
||
|
impl PluginRegistrar for PluginManager {
|
||
|
fn register_plugin(&mut self, plugin: Box<dyn Plugin>) {
|
||
|
self.plugins.push(plugin)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
pub type PluginManagerType = Vec<Arc<Box<dyn Plugin>>>;
|
||
|
|
||
|
pub fn loader() -> anyhow::Result<PluginManagerType> {
|
||
|
// get path to .so lib from command argument
|
||
|
let config_dir = "./plugins";
|
||
|
let paths = fs::read_dir(config_dir)?;
|
||
|
|
||
|
// create a plugin manager where all loaded plugins will be located
|
||
|
let mut plugin_manager = PluginManager::new();
|
||
|
|
||
|
// for all plugin in directory
|
||
|
for path in paths {
|
||
|
// get library file path
|
||
|
let path = path?.path();
|
||
|
|
||
|
// loading library with .so is unsafe
|
||
|
unsafe {
|
||
|
// load library
|
||
|
// Box::new and Box::leak must be there because if it isn't there it throws a segmentation fault
|
||
|
let lib = Box::leak(Box::new(Library::new(path)?));
|
||
|
|
||
|
// get `plugin_entry` from library
|
||
|
let func: Symbol<unsafe extern "C" fn(&mut dyn PluginRegistrar) -> ()> =
|
||
|
lib.get(b"plugin_entry")?;
|
||
|
|
||
|
// execute initial function
|
||
|
func(&mut plugin_manager);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// create Arc in Vector
|
||
|
let mut plugins: PluginManagerType = Vec::new();
|
||
|
for plugin in plugin_manager.plugins {
|
||
|
plugins.push(Arc::new(plugin))
|
||
|
}
|
||
|
|
||
|
Ok(plugins)
|
||
|
}
|