Sets restart required when a plugin is updated (#794)

* Template type for load plugin config

* Add plugin update checking

* Add restart icon to instance list

* Add tests

* Log package name when failing to read package json

test/controller/Controller.js

@@ -1,4 +1,5 @@
 "use strict";
+const path = require("node:path");
 const assert = require("assert").strict;
 const { Controller, HostInfo, InstanceInfo } = require("@clusterio/controller");
 const { ControllerConfig, Address, RequestError, InstanceConfig, SystemInfo, Role } = require("@clusterio/lib");
@@ -27,8 +28,10 @@ describe("controller/src/Controller", function() {
 	describe("class Controller", function() {
 		/** @type {Controller} */
 		let controller, mockInstanceConfig;
+		const controllerVersion = require("@clusterio/controller/package.json").version;
 		before(async function() {
-			controller = new Controller({}, [], new ControllerConfig("controller"));
+			const controllerConfig = new ControllerConfig("controller", { "controller.version": controllerVersion });
+			controller = new Controller({}, [], controllerConfig);
 			mockInstanceConfig = new MockInstanceConfig(new Map([
 				["instance.id", 100], ["instance.name", "test"], ["factorio.settings", []],
 			]));
@@ -233,6 +236,62 @@ describe("controller/src/Controller", function() {
 				assert(instanceInfo.updatedAtMs === 0, "updatedAtMs incremented");
 			});
 		});
+		describe(".checkRestartRequired()", function() {
+			beforeEach(function() {
+				// Would not be needed if controller setup was beforeEach
+				controller.config.restartRequired = false;
+				controller.config.set("controller.version", controllerVersion);
+				controller.config.set("global_chat.load_plugin", true);
+				controller.pluginInfos[0] = {
+					name: "global_chat",
+					requirePath: path.dirname(require.resolve("@clusterio/controller/package.json")),
+					version: controllerVersion,
+				};
+			});
+			it("returns false when no changes are present", async function() {
+				controller.pluginInfos[0].webEntrypoint = true;
+				controller.pluginInfos[0].controllerEntrypoint = true;
+				const result = await controller.checkRestartRequired();
+				assert.equal(result, false);
+				assert.equal(controller.config.restartRequired, false);
+			});
+			it("returns false when an unloaded plugin version changes", async function() {
+				controller.pluginInfos[0].version = "0.0.0";
+				controller.pluginInfos[0].webEntrypoint = true;
+				controller.pluginInfos[0].controllerEntrypoint = true;
+				controller.config.set("global_chat.load_plugin", false);
+				controller.config.restartRequired = false; // Setting load_plugin requires a restart
+				const result = await controller.checkRestartRequired();
+				assert.equal(result, false);
+				assert.equal(controller.config.restartRequired, false);
+			});
+			it("returns true when the config flag is set", async function() {
+				controller.config.restartRequired = true;
+				const result = await controller.checkRestartRequired();
+				assert.equal(result, true);
+				assert.equal(controller.config.restartRequired, true);
+			});
+			it("returns true when clusterio version changes", async function() {
+				controller.config.set("controller.version", "0.0.0");
+				const result = await controller.checkRestartRequired();
+				assert.equal(result, true);
+				assert.equal(controller.config.restartRequired, true);
+			});
+			it("returns true when a controller plugin version changes", async function() {
+				controller.pluginInfos[0].version = "0.0.0";
+				controller.pluginInfos[0].controllerEntrypoint = true;
+				const result = await controller.checkRestartRequired();
+				assert.equal(result, true);
+				assert.equal(controller.config.restartRequired, true);
+			});
+			it("returns true when a web plugin version changes", async function() {
+				controller.pluginInfos[0].version = "0.0.0";
+				controller.pluginInfos[0].webEntrypoint = true;
+				const result = await controller.checkRestartRequired();
+				assert.equal(result, true);
+				assert.equal(controller.config.restartRequired, true);
+			});
+		});
 	});
 	describe("migrations", function() {
 		describe("SystemInfo", function() {