/**
 * SearchService — cross-context keyword search across conversations, groups, and channels.
 *
 * Aggregates search results from all contexts a member has access to,
 * returning paginated results with context metadata (sender, timestamp,
 * context name/type).
 *
 * Requirements: 10.4
 */
import { IPaginatedResult, ISearchResultItem } from '../../interfaces/communication';
import { ChannelService } from './channelService';
import { ConversationService } from './conversationService';
import { GroupService } from './groupService';
export declare class SearchService {
    private readonly conversationService;
    private readonly groupService;
    private readonly channelService;
    constructor(conversationService: ConversationService, groupService: GroupService, channelService: ChannelService);
    /**
     * Search messages by keyword across all contexts the member has access to.
     *
     * Results are sorted by `createdAt` descending (newest first) and include
     * sender, timestamp, and context name for each match.
     */
    searchAll(memberId: string, query: string, cursor?: string, limit?: number): IPaginatedResult<ISearchResultItem>;
    private searchConversations;
    private searchGroups;
    private searchChannels;
}
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