/**
 * Copyright 2025 Vybestack LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type { MediaBlock } from '../../services/history/IContent.js';
export type MediaCategory = 'image' | 'pdf' | 'audio' | 'video' | 'unknown';
export declare function classifyMediaBlock(media: MediaBlock): MediaCategory;
export declare function buildUnsupportedMediaPlaceholder(media: MediaBlock, providerName: string): string;
/**
 * Normalizes a MediaBlock to a data URI format suitable for API consumption.
 * Handles both URL-encoded and base64-encoded media.
 */
export declare function normalizeMediaToDataUri(media: MediaBlock): string;