import { EventEmitter, OnChanges, OnDestroy, SimpleChanges } from '@angular/core';
import { OpenGraphMetaData } from '../../interfaces/open-graph-meta-data';
import { NgxLinkPreviewCacheService } from '../../services/ngx-link-preview-cache.service';
import { Observable } from 'rxjs';
import { DomSanitizer } from '@angular/platform-browser';
import * as i0 from "@angular/core";
type HtmlLinkTarget = '_blank' | '_self' | '_parent' | '_top' | FrameName;
type FrameName = string;
export declare class NgxLinkPreviewComponent implements OnChanges, OnDestroy {
    private sanitizer;
    private cacheSvc;
    /** Plain links string array */
    links: string[];
    /** Input string to parse for links */
    parseForLinksStr: string;
    /** Method that does the API request, provide as class member arrow function from parent */
    getApiEndpoint$: (requestUrl: string) => Observable<any>;
    /** API route where to get the meta data from, component will build the full request url
     * Schema: api.example.com/api/get-meta-data?url=d3d3LmV4YW1wbGUuY29t
     */
    apiRoute: string;
    /** Target url will be attached as encodeURI(btoa(url)), so it must be decoded on the server */
    queryParamName: string;
    /** boolean: show image in preview */
    showImage: boolean;
    /** boolean: show site name in preview */
    showSiteName: boolean;
    /** boolean: show title in preview */
    showTitle: boolean;
    /** boolean: show description in preview */
    showDescription: boolean;
    /** boolean: show link url in preview */
    showLinkUrl: boolean;
    /** boolean: use cache to display previews faster on next rendering */
    useCache: boolean;
    /** number: max age the data cache of a link preview should be used */
    maxCacheAgeMs: number;
    /** boolean: show loading indicator */
    showLoadingIndicator: boolean;
    /**
     * boolean: whether the <a href="..."></a> link should be clickable.
     * This is a question of context security. Otherwise use (previewClick) event.
     */
    useHtmlLinkDefaultClickEvent: boolean;
    /**
     * HtmlLinkTarget: where the HTML link should be opened on click.
     * Only has an effect if [useHtmlLinkDefaultClickEvent]="true"
     */
    htmlLinkTarget: HtmlLinkTarget;
    /** Event emitter: on click to handle the click event, emits the clicked URL */
    previewClicked: EventEmitter<string>;
    /** Scanned links[] from @Input() links & @Input() parseForLinks */
    private scannedLinks;
    /** Array of metadata objects where the preview is rendered from */
    previews: OpenGraphMetaData[];
    private loadingMgr;
    loadingSpinner: import("@angular/platform-browser").SafeHtml;
    showLoadingSpinner: boolean;
    private subscriptions;
    constructor(sanitizer: DomSanitizer, cacheSvc: NgxLinkPreviewCacheService);
    ngOnDestroy(): void;
    /**
     * Preview will be refreshed every time a change is recognized
     */
    ngOnChanges(changes: SimpleChanges): void;
    /**
     * Subscribe to loading manager has jobs stream
     */
    private subscribeLoadingMgrHasJobs;
    /**
     * Unsubscribe all subscriptions
     */
    private unsubscribeAll;
    /**
     * Init preview
     */
    private init;
    /**
     * Load cache or get from api
     */
    private loadCacheOrGet;
    /**
     * Check if cache item is outdated by max-cache-age
     */
    private isCacheOutdated;
    /**
     * On link click emit to EventEmitter
     */
    onLinkClick(url: string): void;
    disableDefaultLink(event: MouseEvent): void;
    /**
     * Encode string url safe
     */
    private encodeUrlSafe;
    /**
     * Check required input parameters
     */
    private checkInputParameters;
    /**
     * Parse string for links
     */
    private parseStringForLinks;
    /**
     * Get sanitized image url due data often contains url errors
     */
    getSanitizedImageUrl(p: OpenGraphMetaData): string;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxLinkPreviewComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<NgxLinkPreviewComponent, "ngx-link-preview", never, { "links": { "alias": "links"; "required": false; }; "parseForLinksStr": { "alias": "parseForLinksStr"; "required": false; }; "getApiEndpoint$": { "alias": "getApiEndpoint$"; "required": false; }; "apiRoute": { "alias": "apiRoute"; "required": false; }; "queryParamName": { "alias": "queryParamName"; "required": false; }; "showImage": { "alias": "showImage"; "required": false; }; "showSiteName": { "alias": "showSiteName"; "required": false; }; "showTitle": { "alias": "showTitle"; "required": false; }; "showDescription": { "alias": "showDescription"; "required": false; }; "showLinkUrl": { "alias": "showLinkUrl"; "required": false; }; "useCache": { "alias": "useCache"; "required": false; }; "maxCacheAgeMs": { "alias": "maxCacheAgeMs"; "required": false; }; "showLoadingIndicator": { "alias": "showLoadingIndicator"; "required": false; }; "useHtmlLinkDefaultClickEvent": { "alias": "useHtmlLinkDefaultClickEvent"; "required": false; }; "htmlLinkTarget": { "alias": "htmlLinkTarget"; "required": false; }; }, { "previewClicked": "previewClicked"; }, never, ["*"], false, never>;
}
export {};