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116 lines
3.0 KiB
TypeScript
116 lines
3.0 KiB
TypeScript
//
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// Copyright © 2020, 2021 Anticrm Platform Contributors.
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// Copyright © 2021 Hardcore Engineering Inc.
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//
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// Licensed under the Eclipse Public License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License. You may
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// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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//
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import { monitor } from './event'
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import { _parseId } from './ident'
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import type { Plugin, Resource } from './platform'
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import { PlatformError, Severity, Status } from './status'
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import platform from './platform'
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/**
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* @public
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*/
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export type Resources = Record<string, Record<string, any>>
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/**
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* @public
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*/
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export interface PluginModule<R extends Resources> {
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default: () => Promise<R>
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}
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/**
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* @public
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*/
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export type PluginLoader<R extends Resources> = () => Promise<PluginModule<R>>
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const locations = new Map<Plugin, PluginLoader<Resources>>()
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/**
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* @public
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* @param plugin -
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* @param module -
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*/
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export function addLocation<R extends Resources> (plugin: Plugin, module: PluginLoader<R>): void {
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locations.set(plugin, module)
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}
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/**
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* @public
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* return list of registred plugins.
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*/
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export function getPlugins (): Plugin[] {
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return Array.from(locations.keys())
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}
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function getLocation (plugin: Plugin): PluginLoader<Resources> {
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const location = locations.get(plugin)
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if (location === undefined) {
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console.log(plugin)
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throw new PlatformError(
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new Status(Severity.ERROR, platform.status.NoLocationForPlugin, {
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plugin
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})
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)
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}
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return location
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}
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const loading = new Map<Plugin, Promise<Resources>>()
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async function loadPlugin (id: Plugin): Promise<Resources> {
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let pluginLoader = loading.get(id)
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if (pluginLoader === undefined) {
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const status = new Status(Severity.INFO, platform.status.LoadingPlugin, {
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plugin: id
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})
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pluginLoader = monitor(status, getLocation(id)()).then(async (plugin) => await plugin.default())
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loading.set(id, pluginLoader)
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}
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return await pluginLoader
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}
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const cachedResource = new Map<string, any>()
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/**
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* @public
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* @param resource -
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* @returns
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*/
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export async function getResource<T> (resource: Resource<T>): Promise<T> {
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const cached = cachedResource.get(resource)
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if (cached !== undefined) {
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return cached
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}
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const info = _parseId(resource)
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const resources = loading.get(info.component) ?? loadPlugin(info.component)
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const value = (await resources)[info.kind]?.[info.name]
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if (value === undefined) {
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throw new PlatformError(new Status(Severity.ERROR, platform.status.ResourceNotFound, { resource }))
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}
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cachedResource.set(resource, value)
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return value
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}
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/**
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* @public
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*/
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export function getResourcePlugin<T> (resource: Resource<T>): Plugin {
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const info = _parseId(resource)
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return info.component
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}
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