import type { QueryDocumentSnapshot } from 'firebase-admin/firestore';
export interface DBSnapshotChanges {
    added: AddedDocumentSnapshot[];
    removed: RemovedDocumentSnapshot[];
    modified: ModifiedDocumentSnapshot[];
    unmodified: UnmodifiedDocumentSnapshot[];
}
declare abstract class BaseDocumentSnapshot {
    protected readonly doc: QueryDocumentSnapshot;
    protected readonly normalizedData?: unknown | undefined;
    readonly normalizedPath: string;
    constructor(doc: QueryDocumentSnapshot, allDocs: QueryDocumentSnapshot[], normalizedData?: unknown | undefined);
    abstract getDiff(): string | undefined;
}
export declare class AddedDocumentSnapshot extends BaseDocumentSnapshot {
    readonly addedDoc: QueryDocumentSnapshot;
    private normalizedAddedData;
    constructor(addedDoc: QueryDocumentSnapshot, normalizedAddedData: unknown, allDocs: QueryDocumentSnapshot[]);
    /**
     * Returns a string with the differences between two objects or undefined if
     * there are no differences.
     * Timestamps are normalized to a string representation before comparison.
     */
    getDiff(): string | undefined;
}
export declare class RemovedDocumentSnapshot extends BaseDocumentSnapshot {
    private normalizedRemovedData;
    constructor(removedDoc: QueryDocumentSnapshot, normalizedRemovedData: unknown, allDocs: QueryDocumentSnapshot[]);
    /**
     * Returns a string with the differences between two objects or undefined if
     * there are no differences.
     * Timestamps are normalized to a string representation before comparison.
     */
    getDiff(): string | undefined;
}
export declare class ModifiedDocumentSnapshot extends BaseDocumentSnapshot {
    readonly beforeDoc: QueryDocumentSnapshot;
    readonly afterDoc: QueryDocumentSnapshot;
    private normalizedBeforeData;
    private normalizedAfterData;
    constructor(beforeDoc: QueryDocumentSnapshot, afterDoc: QueryDocumentSnapshot, normalizeBeforeData: unknown, normalizeAfterData: unknown, allDocs: QueryDocumentSnapshot[]);
    /**
     * Returns a string with the differences between two objects or undefined if
     * there are no differences.
     * Timestamps are normalized to a string representation before comparison.
     */
    getDiff(): string | undefined;
}
export declare class UnmodifiedDocumentSnapshot extends BaseDocumentSnapshot {
    /**
     * Returns a string with the differences between two objects or undefined if
     * there are no differences.
     * Timestamps are normalized to a string representation before comparison.
     */
    getDiff(): string | undefined;
}
export {};