/**
 * A strategy for posting messages to Telegram.
 */
export class TelegramStrategy {
    /**
     * Creates a new instance.
     * @param {TelegramOptions} options Options for the instance.
     * @throws {Error} When options are missing.
     */
    constructor(options: TelegramOptions);
    /**
     * The ID of the strategy.
     * @type {string}
     * @readonly
     */
    readonly id: string;
    /**
     * The display name of the strategy.
     * @type {string}
     * @readonly
     */
    readonly name: string;
    /**
     * Maximum length of a Telegram message in characters.
     * @type {number}
     * @const
     */
    MAX_MESSAGE_LENGTH: number;
    /**
     * Posts a message to Telegram.
     * @param {string} message The message to post.
     * @param {PostOptions} [postOptions] Additional options for the post.
     * @returns {Promise<TelegramMessageResponse>} A promise that resolves with the message data.
     * @throws {Error} When the message fails to post.
     */
    post(message: string, postOptions?: PostOptions): Promise<TelegramMessageResponse>;
    /**
     * Extracts a URL from a Telegram API response.
     * @param {TelegramMessageResponse} response The response from the Telegram API post request.
     * @returns {string} The URL for the Telegram message.
     */
    getUrlFromResponse(response: TelegramMessageResponse): string;
    /**
     * Calculates the length of a message according to Telegram's algorithm.
     * All Unicode characters are counted as is.
     * @param {string} message The message to calculate the length of.
     * @returns {number} The calculated length of the message.
     */
    calculateMessageLength(message: string): number;
    #private;
}
export type PostOptions = import("../types.js").PostOptions;
export type TelegramOptions = {
    /**
     * The Telegram bot token.
     */
    botToken: string;
    /**
     * The Telegram chat ID to post to.
     */
    chatId: string;
};
export type TelegramMessageResponse = {
    /**
     * Whether the request was successful.
     */
    ok: boolean;
    /**
     * The message data.
     */
    result: TelegramMessage;
};
export type TelegramMessage = {
    /**
     * The message ID.
     */
    message_id: number;
    /**
     * The chat the message was sent to.
     */
    chat: TelegramChat;
    /**
     * The text of the message.
     */
    text: string;
};
export type TelegramChat = {
    /**
     * The chat ID.
     */
    id: number;
    /**
     * The type of chat.
     */
    type: string;
};
export type TelegramErrorResponse = {
    /**
     * Whether the request was successful.
     */
    ok: boolean;
    /**
     * The error code.
     */
    error_code: number;
    /**
     * The error description.
     */
    description: string;
};
export type TelegramUpdateResponse = {
    /**
     * Whether the request was successful.
     */
    ok: boolean;
    /**
     * The array of updates.
     */
    result: Array<TelegramUpdate>;
};
export type TelegramUpdate = {
    /**
     * The update ID.
     */
    update_id: number;
    /**
     * The message data.
     */
    message?: TelegramMessage | undefined;
};