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import { randomUUID } from 'crypto';
import { mkdir, writeFile, readFile } from 'fs/promises';
import { basename, join } from 'path';
import { isSafeRouteName, type RouteConfig, type StoredRequest } from '../types/index.js';
import { Either, type IEither } from '@emprespresso/pengueno';
type IncomingUpload = {
fieldName: string;
filename: string;
contentType: string;
size: number;
data: Uint8Array;
};
function sanitizeFilename(filename: string): string {
const base = basename(filename);
const safe = base.replace(/[^a-zA-Z0-9._-]/g, '_');
return safe.length > 0 ? safe.slice(0, 200) : 'upload.bin';
}
export class Storage {
private routes: Map<string, RouteConfig> = new Map();
constructor(private readonly dataDir: string = './data') {}
async init(): Promise<IEither<Error, void>> {
try {
await mkdir(this.dataDir, { recursive: true });
await this.loadRoutes();
return Either.right(<void>undefined);
} catch (err) {
return Either.left(err instanceof Error ? err : new Error(String(err)));
}
}
private async loadRoutes(): Promise<void> {
try {
const routesPath = join(this.dataDir, 'routes.json');
const data = await readFile(routesPath, 'utf-8');
const routes = JSON.parse(data) as RouteConfig[];
for (const route of routes) {
if (!isSafeRouteName(route.name)) {
continue;
}
this.routes.set(route.name, route);
}
} catch {
// routes file doesn't exist yet, that's ok
}
}
private async saveRoutes(): Promise<IEither<Error, void>> {
try {
const routesPath = join(this.dataDir, 'routes.json');
const routes = Array.from(this.routes.values());
await writeFile(routesPath, JSON.stringify(routes, null, 2));
return Either.right(<void>undefined);
} catch (err) {
return Either.left(err instanceof Error ? err : new Error(String(err)));
}
}
async registerRoute(config: RouteConfig): Promise<IEither<Error, void>> {
if (!isSafeRouteName(config.name)) {
return Either.left(new Error('Invalid route name'));
}
this.routes.set(config.name, config);
const routeDir = join(this.dataDir, config.name);
try {
await mkdir(routeDir, { recursive: true });
} catch (err) {
return Either.left(err instanceof Error ? err : new Error(String(err)));
}
return this.saveRoutes();
}
getRoute(name: string): RouteConfig | undefined {
if (!isSafeRouteName(name)) return undefined;
return this.routes.get(name);
}
listRoutes(): RouteConfig[] {
return Array.from(this.routes.values());
}
async deleteRoute(name: string): Promise<IEither<Error, void>> {
if (!isSafeRouteName(name)) {
return Either.left(new Error('Invalid route name'));
}
this.routes.delete(name);
return this.saveRoutes();
}
async storeRequest(
routeName: string,
method: string,
headers: Record<string, string>,
body: unknown,
uploads?: IncomingUpload[],
): Promise<IEither<Error, StoredRequest>> {
if (!isSafeRouteName(routeName)) {
return Either.left(new Error('Invalid route name'));
}
const timestamp = Date.now();
const uuid = randomUUID();
const baseName = `${timestamp}_${uuid}`;
const routeDir = join(this.dataDir, routeName);
try {
await mkdir(routeDir, { recursive: true });
const requestDir = join(routeDir, baseName);
await mkdir(requestDir, { recursive: true });
const files: StoredRequest['files'] = uploads?.length
? await (async () => {
const filesDir = join(requestDir, 'files');
await mkdir(filesDir, { recursive: true });
const storedFiles: NonNullable<StoredRequest['files']> = [];
for (let i = 0; i < uploads.length; i++) {
const upload = uploads[i];
const safeOriginal = sanitizeFilename(upload.filename);
const savedName = `${i}_${safeOriginal}`;
const diskPath = join(filesDir, savedName);
await writeFile(diskPath, Buffer.from(upload.data));
storedFiles.push({
fieldName: upload.fieldName,
originalFilename: upload.filename,
filename: savedName,
contentType: upload.contentType,
size: upload.size,
path: join('files', savedName),
});
}
return storedFiles;
})()
: undefined;
const stored: StoredRequest = {
timestamp,
uuid,
routeName,
method,
headers,
body,
files,
};
await writeFile(join(requestDir, 'request.json'), JSON.stringify(stored, null, 2));
return Either.right(stored);
} catch (err) {
return Either.left(err instanceof Error ? err : new Error(String(err)));
}
}
}
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