fix: use fs adaptor

Author: mnahkies

packages/openapi-code-generator/src/index.ts

@@ -87,5 +87,6 @@ export async function generate(
     filenameConvention: config.filenameConvention,
     allowAny: config.tsAllowAny,
     serverImplementationMethod: config.tsServerImplementationMethod,
+    fsAdaptor,
   })
 }

packages/openapi-code-generator/src/templates.types.ts

@@ -1,3 +1,4 @@
+import type {IFsAdaptor} from "./core/file-system/fs-adaptor"
 import type {Input, OperationGroupStrategy} from "./core/input"
 import type {CompilerOptions} from "./core/loaders/tsconfig.loader"
 import type {IdentifierConvention} from "./core/utils"
@@ -19,6 +20,7 @@ export interface OpenapiGeneratorConfig {
   enableTypedBasePaths: boolean
   groupingStrategy: OperationGroupStrategy
   filenameConvention: IdentifierConvention
+  fsAdaptor: IFsAdaptor
 }
 
 export interface OpenapiTypescriptGeneratorConfig

packages/openapi-code-generator/src/typescript/server/typescript-nextjs/typescript-nextjs.generator.ts

@@ -1,8 +1,7 @@
 // biome-ignore lint/style/useNodejsImportProtocol: <explanation>
-import fs from "fs"
-// biome-ignore lint/style/useNodejsImportProtocol: <explanation>
 import path from "path"
-import {Project} from "ts-morph"
+import {Project, type SourceFile} from "ts-morph"
+import type {IFsAdaptor} from "../../../core/file-system/fs-adaptor"
 import type {CompilerOptions} from "../../../core/loaders/tsconfig.loader"
 import {isTruthy} from "../../../core/utils"
 import type {OpenapiTypescriptGeneratorConfig} from "../../../templates.types"
@@ -41,6 +40,7 @@ export async function generateTypescriptNextJS(
   const appDirectory = [".", "app", subDirectory]
     .filter(isTruthy)
     .join(path.sep)
+
   const generatedDirectory = [".", "generated", subDirectory]
     .filter(isTruthy)
     .join(path.sep)
@@ -85,23 +85,12 @@ export async function generateTypescriptNextJS(
           routeToNextJSFilepath(group.name),
         )
 
-        const existing = fs.existsSync(
-          path.join(emitter.config.destinationDirectory, nextJsAppRouterPath),
-        )
-          ? fs
-              .readFileSync(
-                path.join(
-                  emitter.config.destinationDirectory,
-                  nextJsAppRouterPath,
-                ),
-                "utf-8",
-              )
-              .toString()
-          : ""
-        const sourceFile = project.createSourceFile(
+        const sourceFile = await loadExistingRouteImplementation({
+          fsAdaptor: config.fsAdaptor,
+          project,
+          destinationDirectory: emitter.config.destinationDirectory,
           nextJsAppRouterPath,
-          existing,
-        )
+        })
 
         const nextJSAppRouterBuilder = new TypescriptNextjsAppRouterBuilder(
           nextJsAppRouterPath,
@@ -158,6 +147,30 @@ export async function generateTypescriptNextJS(
   ])
 }
 
+async function loadExistingRouteImplementation({
+  fsAdaptor,
+  project,
+  destinationDirectory,
+  nextJsAppRouterPath,
+}: {
+  fsAdaptor: IFsAdaptor
+  project: Project
+  destinationDirectory: string
+  nextJsAppRouterPath: string
+}): Promise<SourceFile> {
+  const exists = await fsAdaptor.exists(
+    path.join(destinationDirectory, nextJsAppRouterPath),
+  )
+
+  const source = exists
+    ? await fsAdaptor.readFile(
+        path.join(destinationDirectory, nextJsAppRouterPath),
+      )
+    : ""
+
+  return project.createSourceFile(nextJsAppRouterPath, source)
+}
+
 function routeToNextJSFilepath(route: string): string {
   const parts = route
     .split("/")