Files
openstapps/backend/backend/src/routes/plugin-register-route.ts

111 lines
3.6 KiB
TypeScript

/*
* Copyright (C) 2019 StApps
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import {
SCNotFoundErrorResponse,
SCPluginAlreadyRegisteredErrorResponse,
SCPluginMetaData,
SCPluginRegisterRequest,
SCPluginRegisterResponse,
SCPluginRegisterRoute,
} from '@openstapps/core';
import {Logger} from '@openstapps/logger';
import {deepStrictEqual} from 'assert';
import {isTestEnvironment, plugins} from '../common.js';
import {createRoute} from './route.js';
import {backendConfig} from '../config.js';
/**
* Contains information for using the route for registering routes
*/
const pluginRegisterRouteModel = new SCPluginRegisterRoute();
/**
* Implementation of the plugin registration route (SCPluginRegisterRoute)
*/
export const pluginRegisterRouter = createRoute(pluginRegisterRouteModel, pluginRegisterHandler);
/**
* Handles requests on route for registering plugins
* @param request Request received for registering or unregistering a plugin
* @param _app Express application
*/
export async function pluginRegisterHandler(
request: SCPluginRegisterRequest,
_app: Express.Application,
): Promise<SCPluginRegisterResponse> {
switch (request.action) {
case 'add': {
return addPlugin(request.plugin);
}
case 'remove': {
return removePlugin(request.route);
}
}
}
/**
* Adds a plugin to the list (map) of registered plugins
* @param plugin Meta data of the plugin
*/
function addPlugin(plugin: SCPluginMetaData): SCPluginRegisterResponse {
// check if plugin (its route) has already been registered
if (plugins.has(plugin.route)) {
const previouslyRegistered = plugins.get(plugin.route);
try {
deepStrictEqual(previouslyRegistered, plugin);
return {success: true};
} catch {
throw new SCPluginAlreadyRegisteredErrorResponse(
'Plugin already registered',
plugins.get(plugin.route)!,
isTestEnvironment,
);
}
}
// it's a new plugin so it can be added to the map of plugins
plugins.set(plugin.route, plugin);
// add plugin info to app config
if (backendConfig.app.features.plugins === undefined) {
backendConfig.app.features.plugins = {};
}
backendConfig.app.features.plugins[plugin.name] = {urlPath: plugin.route};
Logger.log(
`Registered plugin (name: ${plugin.name}, address: ${plugin.address}) on the route "${plugin.route}".`,
);
return {success: true};
}
/**
* Removes a plugin from the list (map) of registered plugins using the provided route
* @param route Route of the plugin which needs to be unregistered
*/
function removePlugin(route: string): SCPluginRegisterResponse {
if (!plugins.has(route)) {
throw new SCNotFoundErrorResponse(isTestEnvironment);
}
if (plugins.has(route)) {
const plugin = plugins.get(route)!;
delete backendConfig.app.features.plugins?.[plugin.name];
}
// remove the plugin information using its route as a key
plugins.delete(route);
Logger.log(`Removed plugin that used the route "${route}".`);
return {success: true};
}