import { ID, InboxViewId } from './Conversation';
export declare const CONVERSATION_SUBSCRIPTIONS_COLLECTION = "conversation_subscriptions";
export declare const USER_INBOX_ITEMS_COLLECTION = "user_inbox_items";
export declare const USER_INBOX_COUNTERS_COLLECTION = "user_inbox_counters";
export declare const INBOX_PROCESSOR_RECEIPTS_COLLECTION = "inbox_processor_receipts";
/**
 * MongoDB indexes for conversation_subscriptions.
 *
 * The unique index enforces one current subscription state per
 * user/conversation. The follower index resolves the active followers that
 * InboxAudienceResolver receives as input.
 */
export declare const CONVERSATION_SUBSCRIPTION_INDEXES: readonly [{
    readonly name: "uq_subscription_user_conversation";
    readonly key: {
        readonly spaceId: 1;
        readonly userId: 1;
        readonly conversationId: 1;
    };
    readonly unique: true;
}, {
    readonly name: "ix_subscription_conversation_followers";
    readonly key: {
        readonly spaceId: 1;
        readonly conversationId: 1;
        readonly status: 1;
        readonly userId: 1;
    };
}];
/**
 * MongoDB indexes for user_inbox_items.
 *
 * views.viewId is the only array field in each compound index. Do not add
 * views.visibilityReasons to these indexes: MongoDB compound multikey indexes
 * must not combine multiple array paths.
 */
export declare const USER_INBOX_ITEM_INDEXES: readonly [{
    readonly name: "uq_inbox_item_user_conversation";
    readonly key: {
        readonly spaceId: 1;
        readonly userId: 1;
        readonly conversationId: 1;
    };
    readonly unique: true;
}, {
    readonly name: "ix_inbox_view_activity";
    readonly key: {
        readonly spaceId: 1;
        readonly userId: 1;
        readonly 'views.viewId': 1;
        readonly pinned: -1;
        readonly sortAt: -1;
        readonly id: -1;
    };
}, {
    readonly name: "ix_inbox_view_priority";
    readonly key: {
        readonly spaceId: 1;
        readonly userId: 1;
        readonly 'views.viewId': 1;
        readonly pinned: -1;
        readonly priorityScore: -1;
        readonly sortAt: -1;
        readonly id: -1;
    };
}, {
    readonly name: "ix_inbox_view_status_activity";
    readonly key: {
        readonly spaceId: 1;
        readonly userId: 1;
        readonly 'views.viewId': 1;
        readonly 'snapshot.status': 1;
        readonly sortAt: -1;
        readonly id: -1;
    };
}, {
    readonly name: "ix_inbox_view_queue_activity";
    readonly key: {
        readonly spaceId: 1;
        readonly userId: 1;
        readonly 'views.viewId': 1;
        readonly 'snapshot.queueId': 1;
        readonly sortAt: -1;
        readonly id: -1;
    };
}];
/**
 * MongoDB indexes for user_inbox_counters.
 *
 * The unique index also serves reads for all views of a user through its
 * spaceId + userId prefix.
 */
export declare const USER_INBOX_COUNTER_INDEXES: readonly [{
    readonly name: "uq_inbox_counter_user_view";
    readonly key: {
        readonly spaceId: 1;
        readonly userId: 1;
        readonly viewId: 1;
    };
    readonly unique: true;
}];
/**
 * MongoDB indexes for durable processor idempotency receipts.
 */
export declare const INBOX_PROCESSOR_RECEIPT_INDEXES: readonly [{
    readonly name: "uq_inbox_processor_source_scope";
    readonly key: {
        readonly processor: 1;
        readonly sourceEventId: 1;
        readonly scopeKey: 1;
    };
    readonly unique: true;
}];
export type InboxPaginationSort = 'activity' | 'priority';
/**
 * Seek-pagination cursor matching ix_inbox_view_activity.
 */
export interface InboxActivityCursor {
    sort: 'activity';
    pinned: boolean;
    sortAt: Date;
    id: ID;
}
/**
 * Seek-pagination cursor matching ix_inbox_view_priority.
 */
export interface InboxPriorityCursor {
    sort: 'priority';
    pinned: boolean;
    priorityScore: number;
    sortAt: Date;
    id: ID;
}
export type InboxPaginationCursor = InboxActivityCursor | InboxPriorityCursor;
/**
 * Query contract for one logical inbox view.
 *
 * Implementations must use seek pagination with cursor; skip pagination is not
 * compatible with frequently changing sortAt values.
 */
interface InboxPageQueryBase {
    spaceId: ID;
    userId: ID;
    viewId: InboxViewId;
    limit: number;
}
export type InboxPageQuery = InboxPageQueryBase & {
    sort: 'activity';
    cursor?: InboxActivityCursor;
} | InboxPageQueryBase & {
    sort: 'priority';
    cursor?: InboxPriorityCursor;
};
export {};