import BasePluginManager from '../common/BasePluginManager.js';
import Plugin from './Plugin.js';
import Server from './Server.js';
/**
* Callback executed when a plugin internal state is updated.
*
* @callback server.PluginManager~onStateChangeCallback
* @param {object<server.Plugin#id, server.Plugin>} fullState - List of all plugins.
* @param {server.Plugin|null} initiator - Plugin that initiated the update or `null`
* if the change was initiated by the state manager (i.e. when the initialization
* of the plugins starts).
*/
/**
* Delete the registered {@link server.PluginManager~onStateChangeCallback}.
*
* @callback server.PluginManager~deleteOnStateChangeCallback
*/
/**
* The `PluginManager` allows to register and retrieve `soundworks` plugins.
*
* Plugins should always be registered both client-side and server-side,
* and before {@link client.Client#start} or {@link server.Server#start}
* to be properly initialized.
*
* In some sitautions, you might want to register the same plugin factory several times
* using different ids (e.g. for watching several parts of the file system, etc.).
*
* Refer to the plugins' documentation for more precise examples, and the specific API
* they expose. See [https://soundworks.dev/guide/ecosystem](https://soundworks.dev/guide/ecosystem)
* for more informations on the available plugins.
*
* ```
* // client-side
* import { Client } from '@soundworks/core/client.js';
* import syncPlugin from '@soundworks/plugin-sync/client.js';
*
* const client = new Client(config);
* // register the plugin before `client.start()`
* client.pluginManager.register('sync', syncPlugin);
*
* await client.start();
*
* const sync = await client.pluginManager.get('sync');
*
* setInterval(() => {
* // log the estimated global synced clock alongside the local clock.
* console.log(sync.getSyncTime(), sync.getLocalTime());
* }, 1000);
* ```
*
* ```
* // server-side
* import { Server } from '@soundworks/core/server.js';
* import syncPlugin from '@soundworks/plugin-sync/server.js';
*
* const server = new Server(config);
* // register the plugin before `server.start()`
* server.pluginManager.register('sync', syncPlugin);
*
* await server.start();
*
* const sync = await server.pluginManager.get('sync');
*
* setInterval(() => {
* // log the estimated global synced clock alongside the local clock.
* console.log(sync.getSyncTime(), sync.getLocalTime());
* }, 1000);
* ```
*
* @memberof server
* @extends BasePluginManager
* @inheritdoc
* @hideconstructor
*/
class PluginManager extends BasePluginManager {
constructor(server) {
if (!(server instanceof Server)) {
throw new Error(`[soundworks.PluginManager] Invalid argument, "new PluginManager(server)" should receive an instance of "soundworks.Server" as argument`);
}
super(server);
}
register(id, factory = null, options = {}, deps = []) {
const ctor = factory(Plugin);
if (!(ctor.prototype instanceof Plugin)) {
throw new Error(`[soundworks.PluginManager] Invalid argument, "pluginManager.register" second argument should be a factory function returning a class extending the "Plugin" base class`);
}
super.register(id, ctor, options, deps);
}
/**
* Retrieve an fully started instance of a registered plugin.
*
* Be aware that the `get` method resolves only when the plugin is fully 'started',
* which is what we want 99.99% of the time. As such, and to prevent the application
* to be stuck in some kind of Promise dead lock, this method will throw if
* used before `server.init()` (or `server.start()`).
*
* To handle the remaining 0.01% cases and access plugin instances during their
* initialization (e.g. to display initialization screen, etc.), you should rely
* on the `onStateChange` method.
*
* _Note: the async API is designed to enable the dynamic creation of plugins
* (hopefully without brealing changes) in a future release._
*
* @param {server.Plugin#id} id - Id of the plugin as defined when registered.
* @returns {server.Plugin}
* @see {@link server.PluginManager#onStateChange}
*
* @private
*/
async get(id) {
if (this.status !== 'started') {
throw new Error(`[soundworks.PluginManager] Cannot get plugin before "server.init()"`);
}
return super.unsafeGet(id);
}
// server only methods
/** private */
checkRegisteredPlugins(registeredPlugins) {
let missingPlugins = [];
for (let id of registeredPlugins) {
if (!this._instances.has(id)) {
missingPlugins.push(id);
}
}
if (missingPlugins.length > 0) {
throw new Error(`Invalid plugin list, the following plugins registered client-side: [${missingPlugins.join(', ')}] have not been registered server-side. Registered server-side plugins are: [${Array.from(this._instances.keys()).join(', ')}].`);
}
}
/** @private */
async addClient(client, registeredPlugins = []) {
let promises = [];
for (let pluginName of registeredPlugins) {
const plugin = await this.get(pluginName);
const promise = plugin.addClient(client);
promises.push(promise);
}
await Promise.all(promises);
}
/** @private */
async removeClient(client) {
let promises = [];
for (let plugin of this._instances.values()) {
if (plugin.clients.has(client)) {
promises.push(plugin.removeClient(client));
}
}
await Promise.all(promises);
}
}
export default PluginManager;