import { Plugin } from 'vite';
import { I18nOptions } from './options.js';
/**
 * Vite plugin that extracts i18n messages from compiled JavaScript output.
 *
 * After the client build completes, this plugin scans all `.js` files in the
 * output directory for `$localize` tagged template literals and extracts the
 * message IDs and source text. It then writes the extracted messages to a
 * translation source file.
 *
 * Uses `@angular/localize/tools` MessageExtractor when available,
 * falling back to a regex-based extractor.
 */
export declare function i18nExtractPlugin(i18nOptions: I18nOptions): Plugin;
export interface ExtractedMessage {
    id: string;
    text: string;
    description?: string;
}
/**
 * Regex-based fallback extractor for when @angular/localize/tools is not available.
 *
 * Parses `$localize` tagged template literals to extract message IDs and text.
 * Handles the common forms:
 *   $localize`:@@messageId:text`
 *   $localize`:description@@messageId:text`
 *   $localize`text`
 */
export declare function extractWithRegex(files: string[]): ExtractedMessage[];
/**
 * Serializes extracted messages into the specified format.
 */
export declare function serializeMessages(messages: ExtractedMessage[], format: string, sourceLocale: string): string;