language-interceptor.ts

import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
import { Inject, Injectable, LOCALE_ID } from '@angular/core';
import { Observable } from 'rxjs';

@Injectable()
export class LanguageInterceptor implements HttpInterceptor {
  currentLocale: string;

  constructor(@Inject(LOCALE_ID) public locale: string) {
    this.currentLocale = this.locale.split('-', 1)[0];
  }

  intercept(
    req: HttpRequest<any>,
    next: HttpHandler
  ): Observable<HttpEvent<any>> {
    // Clone the request to add the new header
    const clonedRequest = req.clone({
      headers: req.headers.set('Accept-Language', this.currentLocale)
    });
    // Pass the cloned request instead of the original request to the next handle
    return next.handle(clonedRequest);
  }
}