/**
 * This Source Code is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Copyright (c) Infonomic Company Limited
 */
import { type Field, type FileField, type ImageField } from '../@types/field-types.js';
import type { CollectionDefinition } from '../@types/collection-types.js';
/**
 * Predicate: does this field carry an `upload` config? True for any
 * `image` / `file` field with an `upload` block declared.
 */
export declare function isUploadField(field: Field): field is (ImageField | FileField) & {
    upload: NonNullable<(ImageField | FileField)['upload']>;
};
/**
 * Walk the field set and return every upload-capable image/file field
 * on the collection, recursing into `group` / `array` / `blocks`
 * structure fields. Used by the delete path, the upload-route resolver,
 * and any UI that needs to reason about "is this collection
 * upload-capable, and which fields take uploads?"
 *
 * Field names are the upload transport's selector, so a schema should
 * not declare two upload fields with the same name in different nesting
 * scopes — resolvers match by name and take the first hit in
 * declaration order.
 */
export declare function getUploadFields(definition: Pick<CollectionDefinition, 'fields'>): (ImageField | FileField)[];
/**
 * Convenience: does this collection have at least one upload-capable
 * image/file field at any nesting depth? Replaces the old
 * `definition.upload != null` discriminator that "this collection is
 * an upload collection / media library."
 */
export declare function hasUploadField(definition: Pick<CollectionDefinition, 'fields'>): boolean;