/**
 * Storage Enum Type Guards
 *
 * Runtime type guards for storage enums. Useful for validating
 * string inputs from API requests, form data, etc.
 *
 * @module @plyaz/core/domain/files
 *
 * @example
 * ```typescript
 * import { coreIsFileCategory, coreParseFileCategory } from '@plyaz/core/domain/files';
 * import { FILE_CATEGORY } from '@plyaz/types/storage';
 *
 * // Type guard usage
 * if (coreIsFileCategory(value)) {
 *   // value is now typed as FILE_CATEGORY
 * }
 *
 * // Parser usage (returns undefined if invalid)
 * const category = coreParseFileCategory(req.body.category);
 * ```
 */
import { FILE_CATEGORY, ENTITY_TYPE, FILE_ACCESS_LEVEL, UPLOAD_STATUS, STORAGE_ADAPTER_TYPE } from '@plyaz/types/storage';
/**
 * Check if value is a valid FILE_CATEGORY enum value
 */
export declare function coreIsFileCategory(value: unknown): value is FILE_CATEGORY;
/**
 * Safely parse a string to FILE_CATEGORY enum
 * @returns FILE_CATEGORY if valid, undefined otherwise
 */
export declare function coreParseFileCategory(value: string | undefined | null): FILE_CATEGORY | undefined;
/**
 * Check if value is a valid ENTITY_TYPE enum value
 */
export declare function coreIsEntityType(value: unknown): value is ENTITY_TYPE;
/**
 * Safely parse a string to ENTITY_TYPE enum
 * @returns ENTITY_TYPE if valid, undefined otherwise
 */
export declare function coreParseEntityType(value: string | undefined | null): ENTITY_TYPE | undefined;
/**
 * Check if value is a valid FILE_ACCESS_LEVEL enum value
 */
export declare function coreIsFileAccessLevel(value: unknown): value is FILE_ACCESS_LEVEL;
/**
 * Safely parse a string to FILE_ACCESS_LEVEL enum
 * @returns FILE_ACCESS_LEVEL if valid, undefined otherwise
 */
export declare function coreParseFileAccessLevel(value: string | undefined | null): FILE_ACCESS_LEVEL | undefined;
/**
 * Check if value is a valid UPLOAD_STATUS enum value
 */
export declare function coreIsUploadStatus(value: unknown): value is UPLOAD_STATUS;
/**
 * Safely parse a string to UPLOAD_STATUS enum
 * @returns UPLOAD_STATUS if valid, undefined otherwise
 */
export declare function coreParseUploadStatus(value: string | undefined | null): UPLOAD_STATUS | undefined;
/**
 * Check if value is a valid STORAGE_ADAPTER_TYPE enum value
 */
export declare function coreIsStorageAdapterType(value: unknown): value is STORAGE_ADAPTER_TYPE;
/**
 * Safely parse a string to STORAGE_ADAPTER_TYPE enum
 * @returns STORAGE_ADAPTER_TYPE if valid, undefined otherwise
 */
export declare function coreParseStorageAdapterType(value: string | undefined | null): STORAGE_ADAPTER_TYPE | undefined;
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