add composite root for DI

src/lib/server/app.ts

@@ -0,0 +1,15 @@
+import type { CreateUserDTO, UserDTO } from "$lib/dtos/user"
+import { appContainer } from "./dependencyInjection/inversify.config"
+import { TYPES } from "./dependencyInjection/types"
+import type { ICommand } from "./shared/command"
+import type { IQuery } from "./shared/query"
+
+// This file acts as composition root for the application.
+
+// Commands
+export const createUserCommand = appContainer.get<ICommand<CreateUserDTO>>(TYPES.CreateUserCommand)
+
+// Queries
+export const findUserByUsernameQuery = appContainer.get<IQuery<string, UserDTO>>(
+	TYPES.FindUserByUsernameQuery
+)

src/routes/login/+page.server.ts

@@ -1,21 +1,15 @@
-import type { UserDTO } from "$lib/dtos/user"
 import { loginSchema } from "$lib/forms"
+import { findUserByUsernameQuery } from "$lib/server/app"
 import { lucia } from "$lib/server/auth"
-import { appContainer } from "$lib/server/dependencyInjection/inversify.config"
-import { TYPES } from "$lib/server/dependencyInjection/types"
 import { getLimiter } from "$lib/server/limiter"
 import { AuthService } from "$lib/server/services/authService"
-import type { IQuery } from "$lib/server/shared/query"
 import type { Actions, PageServerLoad } from "./$types"
 import { fail, redirect, error } from "@sveltejs/kit"
 import { setError, superValidate } from "sveltekit-superforms"
 import { typebox } from "sveltekit-superforms/adapters"
 
 const limiter = getLimiter("login")
 const authService = new AuthService()
-const findUserByUsernameQuery = appContainer.get<IQuery<string, UserDTO>>(
-	TYPES.FindUserByUsernameQuery
-)
 
 export const load: PageServerLoad = async (event) => {
 	if (event.locals.user) redirect(302, "/")

src/routes/signup/+page.server.ts

@@ -1,11 +1,8 @@
-import type { CreateUserDTO } from "$lib/dtos/user"
 import { signUpSchema } from "$lib/forms"
+import { createUserCommand } from "$lib/server/app"
 import { lucia } from "$lib/server/auth"
-import { appContainer } from "$lib/server/dependencyInjection/inversify.config"
-import { TYPES } from "$lib/server/dependencyInjection/types"
 import { getLimiter } from "$lib/server/limiter"
 import { AuthService } from "$lib/server/services/authService"
-import type { ICommand } from "$lib/server/shared/command"
 import type { Actions, PageServerLoad } from "./$types"
 import { error, fail, redirect } from "@sveltejs/kit"
 import { superValidate, setError } from "sveltekit-superforms"
@@ -14,8 +11,6 @@ import { typebox } from "sveltekit-superforms/adapters"
 const limiter = getLimiter("signup", [5, "m"])
 const authService = new AuthService()
 
-const createUserCommand = appContainer.get<ICommand<CreateUserDTO>>(TYPES.CreateUserCommand)
-
 export const load: PageServerLoad = async (event) => {
 	const form = await superValidate(typebox(signUpSchema))
 	await limiter.cookieLimiter?.preflight(event)