import { DyFM_Msg_Conversation, DyFM_Msg_Participant } from '@futdevpro/fsm-dynamo/messaging';
import { DyNTS_DataService } from '../../../_services/base/data.service';
/**
 * Conversation Data Service
 * Handles CRUD operations for conversations
 */
export declare class DyNTS_Msg_Conversation_DataService extends DyNTS_DataService<DyFM_Msg_Conversation> {
    constructor(set: {
        conversation?: DyFM_Msg_Conversation;
        issuer: string;
    });
    /**
     * Get conversations for a user
     */
    getUserConversations(userId: string): Promise<DyFM_Msg_Conversation[]>;
    /**
     * Add participant to conversation
     */
    addParticipant(conversationId: string, participant: DyFM_Msg_Participant): Promise<void>;
    /**
     * Remove participant from conversation
     */
    removeParticipant(conversationId: string, userId: string): Promise<void>;
    /**
     * Update last message info
     */
    updateLastMessage(conversationId: string, messageId: string, messagePreview: string): Promise<void>;
}
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