import { Email } from './email-viewer.types';
/**
 * Email loading/parsing helpers for `limel-file-viewer`.
 *
 * Parses an RFC 5322 / MIME email message (commonly stored as a `.eml` file)
 * and returns a simplified `Email` view-model.
 */
/**
 * Fetches and parses an email message.
 *
 * - Prefers `email.html` if present, otherwise falls back to `email.text`.
 * - Attempts to resolve inline images referenced via `cid:` by replacing
 *   `<img src="cid:...">` with `data:` URLs generated from inline attachments.
 *
 * @param url - URL to an email message, usually ending in `.eml`.
 * @returns A simplified `Email` object for rendering.
 */
export declare function loadEmail(url: string): Promise<Email>;
declare function extractAttachments(email: any): {
    attachments: Email['attachments'];
    cidUrlById: Map<string, string>;
};
/**
 * Normalizes a Content-ID by removing surrounding angle brackets.
 *
 * Example: `<image@id>` -> `image@id`
 *
 * @param contentId - The Content-ID to normalize, optionally surrounded by angle brackets.
 */
declare function normalizeContentId(contentId?: string): string;
declare function replaceCidReferences(html: string, cidUrlById: Map<string, string>): string;
declare function decodeCidReference(cid: string): string;
declare function getAttachmentBytes(content: unknown): Uint8Array | undefined;
declare function resolveDataUrlMimeType(mimeType: unknown, bytes: Uint8Array, filename?: string): string;
declare function detectImageMimeTypeFromBytes(bytes: Uint8Array): string | undefined;
declare function detectImageMimeTypeFromFilename(filename?: string): string | undefined;
export declare const emailLoaderHelpers: {
    normalizeContentId: typeof normalizeContentId;
    decodeCidReference: typeof decodeCidReference;
    replaceCidReferences: typeof replaceCidReferences;
    getAttachmentBytes: typeof getAttachmentBytes;
    detectImageMimeTypeFromBytes: typeof detectImageMimeTypeFromBytes;
    detectImageMimeTypeFromFilename: typeof detectImageMimeTypeFromFilename;
    resolveDataUrlMimeType: typeof resolveDataUrlMimeType;
    extractAttachments: typeof extractAttachments;
};
export {};
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