Merge pull request moleculerjs#1272 from marceliwac/typed-lifecycle-h…

…andlers

feat: Expand the type for ServiceSchema to allow for typed lifecycle handlers

index.d.ts

@@ -720,12 +720,14 @@ declare namespace Moleculer {
 		version?: string | number;
 	}
 
-	type ServiceSyncLifecycleHandler<S = ServiceSettingSchema> = (this: Service<S>) => void;
-	type ServiceAsyncLifecycleHandler<S = ServiceSettingSchema> = (
-		this: Service<S>
+	type ServiceSyncLifecycleHandler<S = ServiceSettingSchema, T = Service<S>> = (
+		this: T
+	) => void;
+	type ServiceAsyncLifecycleHandler<S = ServiceSettingSchema, T = Service<S>> = (
+		this: T
 	) => void | Promise<void>;
 
-	interface ServiceSchema<S = ServiceSettingSchema> {
+	interface ServiceSchema<S = ServiceSettingSchema, T = void> {
 		name: string;
 		version?: string | number;
 		settings?: S;
@@ -737,9 +739,9 @@ declare namespace Moleculer {
 		hooks?: ServiceHooks;
 
 		events?: ServiceEvents;
-		created?: ServiceSyncLifecycleHandler<S> | ServiceSyncLifecycleHandler<S>[];
-		started?: ServiceAsyncLifecycleHandler<S> | ServiceAsyncLifecycleHandler<S>[];
-		stopped?: ServiceAsyncLifecycleHandler<S> | ServiceAsyncLifecycleHandler<S>[];
+		created?: ServiceSyncLifecycleHandler<S, T> | ServiceSyncLifecycleHandler<S, T>[];
+		started?: ServiceAsyncLifecycleHandler<S, T> | ServiceAsyncLifecycleHandler<S, T>[];
+		stopped?: ServiceAsyncLifecycleHandler<S, T> | ServiceAsyncLifecycleHandler<S, T>[];
 
 		[name: string]: any;
 	}

test/typescript/hello-world/greeter.service.ts

@@ -2,88 +2,149 @@
 
 import { Service } from "../../../";
 import { Context } from "../../../";
-import { ActionHooks, ServiceHooks, ServiceHooksAfter, ServiceSchema } from "../../../";
+import { ServiceSettingSchema, ServiceSchema } from "../../../";
 
-type GreeterWelcomeParams = {
-	name: string
-};
+export interface ActionWelcomeParams {
+	name: string;
+}
 
-export default class GreeterService extends Service {
-	constructor(broker) {
-		super(broker);
+interface GreeterSettings extends ServiceSettingSchema {
+	defaultName: string;
+}
 
-		this.parseServiceSchema({
-			name: "greeter",
-			hooks: {
-				before: {
-					welcome(ctx: Context<GreeterWelcomeParams>): void {
-						// console.log(`Service hook "before".`);
-						ctx.params.name = ctx.params.name.toUpperCase();
-					}
+interface GreeterMethods {
+	uppercase(str: string): string;
+}
+
+interface GreeterLocalVars {
+	myVar: string;
+}
+
+type GreeterThis = Service<GreeterSettings> & GreeterMethods & GreeterLocalVars;
+
+const GreeterService: ServiceSchema<GreeterSettings, GreeterThis> = {
+	name: "greeter",
+
+	/**
+	 *  Hooks
+	 */
+	hooks: {
+		before: {
+			welcome(this: GreeterThis, ctx: Context<ActionWelcomeParams>): void {
+				// console.log(`Service hook "before".`);
+				ctx.params.name = this.uppercase(ctx.params.name);
+			}
+		},
+		after: {
+			hello: "anotherHookAfter",
+			welcome: [
+				function (this: GreeterThis, ctx: Context<ActionWelcomeParams>, res: any): any {
+					// console.log(`Service sync hook "after".`);
+					return res;
 				},
-				after: {
-					hello: "anotherHookAfter",
-					welcome: [
-						function (ctx: Context<GreeterWelcomeParams>, res: any): any {
-							// console.log(`Service sync hook "after".`);
-							return res;
-						},
-						async (ctx: Context<GreeterWelcomeParams>, res: any): Promise<any> => {
-							// console.log(`Service async hook "after".`);
-							return await Promise.resolve(res);
-						},
-						"anotherHookAfter"
-					],
-				} as ServiceHooksAfter,
-				error: {
-					welcome(ctx: Context<GreeterWelcomeParams>, err: Error): void {
-						// console.log(`Service hook "error".`);
-						throw err;
-					}
-				}
-			} as ServiceHooks,
-			actions: {
-				hello: {
-					handler: this.hello,
-					hooks: {
-						after: [
-							function (ctx: Context<GreeterWelcomeParams>, res: any): any {
-								// console.log(`Action sync hook "after".`);
-								return res;
-							},
-							async (ctx: Context<GreeterWelcomeParams>, res: any): Promise<any> => {
-								// console.log(`Action async hook "after".`);
-								return await Promise.resolve(res);
-							},
-							"anotherHookAfter"
-						]
-					} as ActionHooks
+				async function (this: GreeterThis, ctx: Context<ActionWelcomeParams>, res: any): Promise<any> {
+					// console.log(`Service async hook "after".`);
+					return await Promise.resolve(res);
 				},
-				welcome: this.welcome
+				"anotherHookAfter"
+			],
+		},
+		error: {
+			welcome(this: GreeterThis, ctx: Context<ActionWelcomeParams>, err: Error): void {
+				// console.log(`Service hook "error".`);
+				throw err;
+			}
+		}
+	},
+
+	/**
+	 * Settings
+	 */
+	settings: {
+		defaultName: "Moleculer",
+	},
+
+	/**
+	 * Dependencies
+	 */
+	dependencies: [],
+
+	/**
+	 * Actions
+	 */
+	actions: {
+		hello: {
+			rest: {
+				method: "GET",
+				path: "/hello",
+			},
+			handler(this: GreeterThis, ctx: Context): string {
+				return `Hello ${this.settings.defaultName}`;
+			},
+			hooks: {
+				after: [
+					function (this: GreeterThis, ctx: Context, res: any): any {
+						// console.log(`Action sync hook "after".`);
+						return res;
+					},
+					async function (ctx: Context, res: any): Promise<any> {
+						// console.log(`Action async hook "after".`);
+						return await Promise.resolve(res);
+					},
+					"anotherHookAfter"
+				]
 			}
-		} as ServiceSchema);
-	}
+		},
+
+		welcome: {
+			rest: "GET /welcome/:name",
+			params: {
+				name: "string",
+			},
+			handler(this: GreeterThis, ctx: Context<ActionWelcomeParams>): string {
+				return `Welcome, ${ctx.params.name}`;
+			},
+		},
+	},
+
+	/**
+	 * Events
+	 */
+	events: {},
 
 	/**
-	 * Say a 'Hello'
-	 *
-	 * @returns
+	 * Methods
 	 */
-	hello() {
-		return "Hello Moleculer TS";
-	}
+	methods: {
+		uppercase(this: GreeterThis, str: string): string {
+			return str.toUpperCase();
+		},
+
+		async anotherHookAfter(this: GreeterThis, ctx: Context, res: any): Promise<void> {
+			return await Promise.resolve(res);
+		}
+	},
+
+	/**
+	 * Service created lifecycle event handler
+	 */
+	created(this: GreeterThis) {
+		this.logger.info(`${this.name} service - lifecycle method "created" called.`);
+	},
 
 	/**
-	 * Welcome a username
-	 *
-	 * @param {String} name - User name
+	 * Service started lifecycle event handler
 	 */
-	welcome(ctx: Context<GreeterWelcomeParams>) {
-		return `Welcome, ${ctx.params.name}!`;
-	}
-
-	async anotherHookAfter(ctx: Context<GreeterWelcomeParams>, res: any): Promise<any> {
-		// console.log(`Another async hook "after".`);
-		return await Promise.resolve(res);
-	}
+	async started(this: GreeterThis) {
+		this.logger.info(`${this.name} service - lifecycle method "started" called.`);
+	},
+
+	/**
+	 * Service stopped lifecycle event handler
+	 */
+	async stopped(this: GreeterThis) {
+		this.logger.info(`${this.name} service - lifecycle method "stopped" called.`);
+	},
 };
+
+export default GreeterService;

test/typescript/hello-world/index.ts

@@ -29,10 +29,8 @@ broker.loadService(path.join(__dirname, "greeter.service.ts"));
 
 		await broker.call("greeter.hello");
 		const res = await broker.call("greeter.welcome", { name: "Typescript" });
-		broker.logger.info("");
-		broker.logger.info("Result: ", res);
-		broker.logger.info("");
-		if (res != "Welcome, TYPESCRIPT!")
+		broker.logger.info(`Result: ${res}`);
+		if (res != "Welcome, TYPESCRIPT")
 			throw new Error("Result is mismatch!");
 		else
 			await broker.stop();