import { Observable } from 'rxjs';
import { MainService } from '../main/main.service';
import { FileEntity, CommentEntity, NodeEntity, CreatedNode, FileAttach } from '../models';
import * as i0 from "@angular/core";
/**
 * node service for drupal
 * @see BACK_END/admin/structure/services/list/END_POINT/resources for more details
 */
export declare class NodeService extends MainService {
    entityType: string;
    /**
     * impelement index resource
     * @return array of nodes
     */
    getAllNodes(): Observable<NodeEntity[]>;
    /**
     * implement retrive resource
     * @param nid node id to retrive
     * @return object of the node entity
     */
    getNodeById(nid: number): Observable<NodeEntity>;
    /**
     * implement create resource
     * @param node node entity to create
     * @return created node details
     */
    createNode(node: NodeEntity): Observable<CreatedNode>;
    /**
     * implement create resource
     * @param node node to create
     * @return created node details
     */
    updateNode(node: {
        nid: number;
    }): Observable<CreatedNode>;
    /**
     * implement delete resource
     * @param nid node id to delete
     * @return array true if node deleted, otherwise return false array
     */
    deleteNode(nid: number): Observable<boolean[]>;
    /**
     * implement files resource
     * @param nid node id
     * @return array of files that attached to that node
     */
    files(nid: number): Observable<FileEntity[]>;
    /**
    * implement comments resource
    * @param nid node id
    * @return array of comments that attached to that node
    */
    comments(nid: number): Observable<CommentEntity[]>;
    /**
    * implement attach_files resource
    * @param nid node id
    * @file object contains the field details and the file to upload
    * @return attached file
    */
    attachFilesToNode(nid: number, file: FileAttach): Observable<FileEntity>;
    static ɵfac: i0.ɵɵFactoryDeclaration<NodeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NodeService>;
}