✨ add helper function to reverse outside of fastify app and export ro…

…utes

index.d.ts

@@ -1,7 +1,12 @@
 import * as fastify from "fastify"
 import { Server, IncomingMessage, ServerResponse } from "http"
+import { PathFunction } from "path-to-regexp"
 
-declare const reverse: fastify.Plugin<
+declare const routes: Map<string, PathFunction<object>>
+
+declare function reverse<Args>(name: string, args?: Args): string
+
+declare const plugin: fastify.Plugin<
   Server,
   IncomingMessage,
   ServerResponse,
@@ -19,3 +24,4 @@ declare module "fastify" {
 }
 
 export default reverse
+export { plugin, routes }

index.js

@@ -1,22 +1,22 @@
 const fp = require("fastify-plugin")
 const pathToRegexp = require("path-to-regexp")
 
-function plugin(fastify, _, next) {
-  const routes = new Map()
-
-  function reverse(name, args, opts) {
-    const toPath = routes.get(name)
+const routes = new Map()
 
-    if (!toPath) {
-      throw new Error(`Route with name ${name} is not registered`)
-    }
+function reverse(name, args, opts) {
+  const toPath = routes.get(name)
 
-    return toPath(args, opts)
+  if (!toPath) {
+    throw new Error(`Route with name ${name} is not registered`)
   }
 
+  return toPath(args, opts)
+}
+
+function plugin(fastify, _, next) {
   fastify.decorate("reverse", reverse)
 
-  fastify.addHook("onRoute", routeOptions => {
+  fastify.addHook("onRoute", (routeOptions) => {
     if (routeOptions.name) {
       if (routes.has(routeOptions.name)) {
         throw new Error(
@@ -31,7 +31,9 @@ function plugin(fastify, _, next) {
   next()
 }
 
-module.exports = fp(plugin, {
+module.exports = reverse
+module.exports.routes = routes
+module.exports.plugin = fp(plugin, {
   fastify: ">= 1.6.0",
   name: "reverse",
 })

test.js

@@ -1,5 +1,5 @@
 const Fastify = require("fastify")
-const fastifyReverseRoutes = require("./index")
+const reverse = require("./index")
 
 let fastify
 
@@ -13,15 +13,15 @@ afterEach(async () => {
 
 describe("Reverse routes", () => {
   it("Add reverse method", async () => {
-    await fastify.register(fastifyReverseRoutes).ready()
+    await fastify.register(reverse.plugin).ready()
 
     expect(fastify.reverse).toBeDefined()
     expect(typeof fastify.reverse).toBe("function")
   })
 
   it("Reverse pattern to path", async () => {
     await fastify
-      .register(fastifyReverseRoutes)
+      .register(reverse.plugin)
       .route({
         url: "/frameworks/:name",
         method: "GET",
@@ -33,12 +33,16 @@ describe("Reverse routes", () => {
     expect(fastify.reverse("frameworks", { name: "fastify" })).toBe(
       "/frameworks/fastify",
     )
+
+    expect(reverse("frameworks", { name: "fastify" })).toBe(
+      "/frameworks/fastify",
+    )
   })
 
   it("Plugin throws for duplicated routes", async () => {
     try {
       await fastify
-        .register(fastifyReverseRoutes)
+        .register(reverse.plugin)
         .route({
           url: "/frameworks/:name",
           method: "GET",
@@ -59,7 +63,7 @@ describe("Reverse routes", () => {
 
   it("Reverse throws for non registered route", async () => {
     await fastify
-      .register(fastifyReverseRoutes)
+      .register(reverse.plugin)
       .route({
         url: "/frameworks/:name",
         method: "GET",
@@ -68,7 +72,7 @@ describe("Reverse routes", () => {
       .ready()
 
     expect(() => {
-      expect(fastify.reverse("frameworks", { name: "fastify" })).toBe(
+      expect(fastify.reverse("books", { name: "fastify" })).toBe(
         "/frameworks/fastify",
       )
     }).toThrow()