import { Meta, Title } from '@angular/platform-browser';
import { Subscription } from 'rxjs';
import { Recipe, Supplier } from '../_models';
import { SuppliersService } from './suppliers.service';
import * as i0 from "@angular/core";
export declare class SeoService {
    private suppliersService;
    private titleService;
    private metaService;
    locale: string;
    recipe: Recipe;
    supplier: Supplier;
    title: HTMLTitleElement;
    tags: HTMLMetaElement[];
    subscription: Subscription[];
    private previousTitle;
    private previousRobotsTagContent;
    private previousCanonicalLinkHref;
    constructor(suppliersService: SuppliersService, titleService: Title, metaService: Meta, locale: string);
    setSEOData(recipe: Recipe): void;
    private setCanonicalUrlTag;
    private repositionMetaTags;
    removeSEOData(): void;
    private rollbackCanonicalLink;
    private addSEOTags;
    private supplierIsRecipeProvider;
    private buildJsonLD;
    private addSEOScript;
    private removeSEOScript;
    static ɵfac: i0.ɵɵFactoryDef<SeoService, never>;
    static ɵprov: i0.ɵɵInjectableDef<SeoService>;
}
//# sourceMappingURL=seo.service.d.ts.map