import * as functions from 'firebase-functions';
/**
 * Update foreign key join data
 * @param change - change event
 * @param queryRef - query for fk docs
 * @param fields - fields to update, default *
 * @param field - field to store updated fields
 * @param isMap - see if field dot notation equals map, default true
 */
export declare function updateJoinData(change: functions.Change<functions.firestore.DocumentSnapshot>, queryRef: FirebaseFirestore.Query, fields: string[] | null, field: string, del?: boolean, isMap?: boolean): Promise<null>;
/**
 * Create data to join on document
 * @param change - change event
 * @param targetRef - the target document
 * @param fields - the fields to get from the target document
 * @param field - the field to store the target document fields
 * @param data - data object to update
 * @param alwaysCreate - create even if not necessary
 */
export declare function createJoinData(change: functions.Change<functions.firestore.DocumentSnapshot>, targetRef: FirebaseFirestore.DocumentReference, fields: string[], field?: string, data?: any, alwaysCreate?: boolean): Promise<any>;
/**
 * Get data to join on document
 * @param change - change event
 * @param targetRef - the target document
 * @param fields - the fields to get from the target document
 * @param field - the field to store the target document fields
 * @param data - data object to update
 * @param alwaysCreate - create even if not necessary
 */
export declare function getJoinData(change: functions.Change<functions.firestore.DocumentSnapshot>, targetRef: FirebaseFirestore.DocumentReference, fields: string[], field?: string, data?: any, alwaysCreate?: boolean): Promise<any>;
/**
 * Aggregate data
 * @param change - change functions snapshot
 * @param context - event context
 * @param targetRef - document reference to edit
 * @param queryRef - query reference to aggregate on doc
 * @param fieldExceptions - the fields not to include
 * @param aggregateField - the name of the aggregated field
 * @param n - the number of documents to aggregate, default 3
 * @param data - if adding any other data to the document
 * @param alwaysAggregate - skip redundant aggregation, useful if not date sort
 */
export declare function aggregateData(change: functions.Change<functions.firestore.DocumentSnapshot>, context: functions.EventContext, targetRef: FirebaseFirestore.DocumentReference, queryRef: FirebaseFirestore.Query, fieldExceptions?: string[], aggregateField?: string, n?: number, data?: any, alwaysAggregate?: boolean): Promise<null>;
/**
 * @param change - change functions snapshot
 * @param context - event context
 * @param _opts : {
 *   fieldToIndex - field to save in array or map, default id
 *   max - maximum number of items in array / map, default 10,000
 *   type - array or map, default array
 *   indexFieldName - name of field to store array, defaults to collection name
 *   indexColName - name of new index collection, default collection_name__index
 *   indexPath - path to store new collection, defaults to parent doc
 *   docToIndex - doc to index with array, defaults to to parent doc
 *   docFieldsToIndex - fields from parent doc to index, default *
 *   docFieldName - name of field to store parent doc in, defaults to col name
 *   docSortField - name of field to sort documents by, default createdAt
 *   docSortType - sort by id or value (add id sort, or map value sort), default null
 * }
 */
export declare function arrayIndex(change: functions.Change<functions.firestore.DocumentSnapshot>, context: functions.EventContext, _opts?: {
    fieldToIndex?: string;
    max?: number;
    type?: "array" | "map";
    indexFieldName?: string;
    indexColName?: string;
    indexPath?: string;
    docToIndex?: string;
    docFieldsToIndex?: string | string[];
    docFieldName?: string;
    docSortField?: string;
    docSortType?: "id" | "value" | null;
}): Promise<void>;