/**
 * MessageOperationsService — shared message operation logic for Groups and Channels.
 *
 * Encapsulates edit, delete, pin/unpin, and reaction operations with
 * permission checks. Both GroupService and ChannelService delegate to
 * this service to avoid duplicating message operation logic.
 *
 * Requirements: 9.1, 9.2, 9.3, 9.4, 9.6
 */
import { Permission } from '../../enumerations/communication';
import { ICommunicationMessage } from '../../interfaces/communication';
import { PermissionService } from './permissionService';
export declare class MessageNotFoundError extends Error {
    constructor(messageId: string);
}
export declare class MessageAuthorError extends Error {
    constructor();
}
export declare class MessagePermissionError extends Error {
    readonly missingPermission: Permission;
    constructor(permission: Permission);
}
export declare class MessageReactionNotFoundError extends Error {
    constructor(reactionId: string);
}
/**
 * Context that holds a pinnedMessageIds list (both IGroup and IChannel).
 */
export interface IPinnableContext {
    pinnedMessageIds: string[];
}
/**
 * Shared message operations for edit, delete, pin, and reaction logic.
 * Callers are responsible for membership/existence checks on the context
 * (group or channel) before invoking these methods.
 */
export declare class MessageOperationsService {
    private readonly permissionService;
    constructor(permissionService: PermissionService);
    /**
     * Edit a message authored by the requesting member.
     * Preserves previous content in editHistory.
     *
     * Requirement 9.1: update content, preserve edit history, set editedAt.
     */
    editMessage(messages: ICommunicationMessage[], messageId: string, memberId: string, newContent: string, messageNotFoundFactory: (id: string) => Error, authorErrorFactory: () => Error): ICommunicationMessage;
    /**
     * Delete a message. Authors can delete their own; moderators/admins
     * need DELETE_ANY_MESSAGE permission.
     *
     * Requirements 9.2, 9.3: mark as deleted, set deletedBy.
     */
    deleteMessage(messages: ICommunicationMessage[], contextId: string, messageId: string, memberId: string, messageNotFoundFactory: (id: string) => Error, permissionErrorFactory: (p: Permission) => Error): void;
    /**
     * Pin a message. Requires PIN_MESSAGES permission.
     * Adds the message ID to the context's pinnedMessageIds list.
     *
     * Requirement 9.3: add to pinned messages list.
     */
    pinMessage(messages: ICommunicationMessage[], contextId: string, messageId: string, memberId: string, context: IPinnableContext, messageNotFoundFactory: (id: string) => Error, permissionErrorFactory: (p: Permission) => Error): void;
    /**
     * Unpin a message. Requires PIN_MESSAGES permission.
     * Removes the message ID from the context's pinnedMessageIds list.
     *
     * Requirement 9.3: remove from pinned messages list.
     */
    unpinMessage(messages: ICommunicationMessage[], contextId: string, messageId: string, memberId: string, context: IPinnableContext, messageNotFoundFactory: (id: string) => Error, permissionErrorFactory: (p: Permission) => Error): void;
    /**
     * Add a reaction to a message.
     *
     * Requirement 9.4: add reaction with emoji and member tracking.
     */
    addReaction(messages: ICommunicationMessage[], messageId: string, memberId: string, emoji: string, messageNotFoundFactory: (id: string) => Error): string;
    /**
     * Remove a reaction from a message.
     *
     * Requirement 9.4: remove reaction from message.
     */
    removeReaction(messages: ICommunicationMessage[], messageId: string, reactionId: string, messageNotFoundFactory: (id: string) => Error, reactionNotFoundFactory: (id: string) => Error): void;
}
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