import { Meta, MetaDefinition, Title } from "@angular/platform-browser";
import { SeoMetaNameType, SeoModel } from "./seo.model";
import * as i0 from "@angular/core";
export declare class SeoService {
    private meta;
    private title;
    private document;
    private metaTags;
    private readonly canonicalLinkElement;
    private readonly schemaElement;
    constructor(meta: Meta, title: Title, document: any);
    /**
     * Title
     */
    setTitle(title: string): void;
    /**
     * Meta tags
     */
    setMetaTags(metaTags: MetaDefinition[]): void;
    removeMetaTags(): void;
    updateMetaTags(metaTags: MetaDefinition[]): void;
    /**
     * Canonical
     */
    setCanonical(link: string): void;
    removeCanonical(): void;
    updateCanonicalLink(link?: string): void;
    /**
     * Json schema
     */
    setSchema(schema: any): void;
    removeSchema(): void;
    updateSchema(schema: any): void;
    /**
     * update Seo
     */
    updateSeo<T extends object>(seo: SeoModel<T>): void;
    /**
     * set meta tag content
     */
    setMetaTagByNameContent(name: SeoMetaNameType, content: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SeoService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SeoService>;
}