import { UserService } from 'ngx-login-client';
import { BehaviorSubject, Observable } from 'rxjs';
import { AreaQuery } from '../models/area.model';
import { IterationQuery } from '../models/iteration.model';
import { LabelQuery } from '../models/label.model';
export declare class QuerySuggestionService {
    private areaQuery;
    private iterationQuery;
    private userService;
    private labelQuery;
    queryObservable: BehaviorSubject<string>;
    private valueToSuggest;
    private valueToSuggestObservable;
    constructor(areaQuery: AreaQuery, iterationQuery: IterationQuery, userService: UserService, labelQuery: LabelQuery);
    private fields;
    fetchUsersBySearchValue(): Observable<string[]>;
    /**
     * Takes the entire query written so far
     * split the query by keywords for the
     * ease of processing
     * @param query
     */
    shouldSuggestField(query: string): {
        suggest: boolean;
        value: string;
        lastKey: string;
    };
    /**
     * Takes a chunk of the query
     * extract the field and typed value
     * @param query
     */
    suggestValue(query: string): {
        field: string;
        value: string;
    };
    replaceSuggestion(query_before_cursor: string, query_after_cursor: string, suggestion: string): string;
    /**
     * This function takes the query and the suggested value to be replaced
     * the value is what is typed so far or before the cursor after the last key
     * for example, if the query before cursor is "area.name: area - 1 $AND iteration"
     * and after cursor is ".name: iteration - 1"
     * the value should be "iteration" and we'll have to remove that part from
     * query before cursor
     * For query after cursor section, we have to detect the first occurance of any key
     * and remove till that from initial of that part.
     * For our example the first key is ":" and we have to remove ".name" from that section
     * @param query_before_cursor
     * @param query_after_cursor
     * @param value
     * @param suggestion
     */
    replaceSuggestedValue(query_before_cursor: string, query_after_cursor: string, value: string, suggestion: string): string;
    getSuggestions(): Observable<string[]>;
}