feat(nestjs): migrate to NestJS

packages/server/src/common/interceptors/serialize.interceptor.ts

@@ -0,0 +1,78 @@
+import {
+  type ExecutionContext,
+  Injectable,
+  type NestInterceptor,
+  type CallHandler,
+  Optional,
+} from '@nestjs/common';
+import { type Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+
+export function camelToSnake<T = any>(value: T) {
+  if (value === null || value === undefined) {
+    return value;
+  }
+  if (Array.isArray(value)) {
+    return value.map(camelToSnake);
+  }
+  if (typeof value === 'object' && !(value instanceof Date)) {
+    return Object.fromEntries(
+      Object.entries(value).map(([key, value]) => [
+        key
+          .split(/(?=[A-Z])/)
+          .join('_')
+          .toLowerCase(),
+        camelToSnake(value),
+      ]),
+    );
+  }
+  return value;
+}
+
+export function snakeToCamel<T = any>(value: T) {
+  if (value === null || value === undefined) {
+    return value;
+  }
+
+  if (Array.isArray(value)) {
+    return value.map(snakeToCamel);
+  }
+
+  const impl = (str: string) => {
+    const converted = str.replace(/([-_]\w)/g, (group) =>
+      group[1].toUpperCase(),
+    );
+    return converted[0].toLowerCase() + converted.slice(1);
+  };
+
+  if (typeof value === 'object' && !(value instanceof Date)) {
+    return Object.fromEntries(
+      Object.entries(value).map(([key, value]) => [
+        impl(key),
+        snakeToCamel(value),
+      ]),
+    );
+  }
+  return value;
+}
+
+export const DEFAULT_STRATEGY = {
+  in: snakeToCamel,
+  out: camelToSnake,
+};
+
+@Injectable()
+export class SerializeInterceptor implements NestInterceptor<any, any> {
+  constructor(@Optional() readonly strategy = DEFAULT_STRATEGY) {}
+
+  intercept(
+    context: ExecutionContext,
+    next: CallHandler<any>,
+  ): Observable<any> {
+    const request = context.switchToHttp().getRequest();
+    request.body = this.strategy.in(request.body);
+
+    // handle returns stream..
+    return next.handle().pipe(map(this.strategy.out));
+  }
+}