80 lines
2.3 KiB
TypeScript
80 lines
2.3 KiB
TypeScript
import { eventBus } from '@/lib/events/bus'
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import type { CoreEventType } from '@/lib/events/types'
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import type { Extension } from './types'
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/**
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* Extension Registry — singleton that manages extension lifecycle.
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*
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* - register() stores extension and wires event handlers to the bus
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* - unregister() unhooks handlers and removes extension
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* - getAll(), get(), getByCapability() for querying
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*/
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class ExtensionRegistry {
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private extensions = new Map<string, Extension>()
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private unsubscribers = new Map<string, (() => void)[]>()
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/**
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* Register an extension: store it and wire its event handlers to the bus.
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*/
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register(extension: Extension): void {
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if (this.extensions.has(extension.id)) {
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console.warn(`[ExtensionRegistry] Extension "${extension.id}" already registered, skipping`)
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return
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}
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this.extensions.set(extension.id, extension)
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// Wire event handlers to the bus
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const unsubs: (() => void)[] = []
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if (extension.eventHandlers) {
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for (const { eventType, handler } of extension.eventHandlers) {
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// Cast is safe: the handler is stored by eventType key, so it only receives matching payloads
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const unsub = eventBus.on(eventType as CoreEventType, handler)
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unsubs.push(unsub)
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}
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}
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this.unsubscribers.set(extension.id, unsubs)
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}
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/**
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* Unregister an extension: unhook all event handlers and remove.
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*/
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unregister(extensionId: string): void {
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const unsubs = this.unsubscribers.get(extensionId)
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if (unsubs) {
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for (const unsub of unsubs) {
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unsub()
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}
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this.unsubscribers.delete(extensionId)
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}
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this.extensions.delete(extensionId)
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}
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/** Get all registered extensions. */
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getAll(): Extension[] {
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return [...this.extensions.values()]
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}
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/** Get a specific extension by ID. */
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get(id: string): Extension | undefined {
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return this.extensions.get(id)
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}
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/** Get all extensions that have a specific capability. */
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getByCapability(key: keyof Extension): Extension[] {
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return [...this.extensions.values()].filter(
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(ext) => ext[key] !== undefined && ext[key] !== null
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)
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}
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/** Clear all extensions (useful for testing). */
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clear(): void {
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for (const id of this.extensions.keys()) {
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this.unregister(id)
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}
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}
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}
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/** Module-level singleton */
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export const extensionRegistry = new ExtensionRegistry()
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