/**
 * A strategy for posting messages to Slack.
 */
export class SlackStrategy {
    /**
     * Creates a new instance.
     * @param {SlackOptions} options Options for the instance.
     * @throws {Error} When options are missing.
     */
    constructor(options: SlackOptions);
    /**
     * Maximum length of a Slack message in characters.
     * @type {number}
     * @const
     */
    MAX_MESSAGE_LENGTH: number;
    /**
     * The ID of the strategy.
     * @type {string}
     * @readonly
     */
    readonly id: string;
    /**
     * The display name of the strategy.
     * @type {string}
     * @readonly
     */
    readonly name: string;
    /**
     * Calculates the length of a message according to Slack's algorithm.
     * All 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;
    /**
     * Posts a message to Slack.
     * @param {string} message The message to post.
     * @param {PostOptions} [postOptions] Additional options for the post.
     * @returns {Promise<SlackMessageResponse>} A promise that resolves with the message data.
     * @throws {Error} When the message fails to post.
     */
    post(message: string, postOptions?: PostOptions): Promise<SlackMessageResponse>;
    /**
     * Gets the URL for a response.
     * @param {SlackMessageResponse} response The response from posting.
     * @returns {string} The URL for the message.
     */
    getUrlFromResponse(response: SlackMessageResponse): string;
    #private;
}
export type PostOptions = import("../types.js").PostOptions;
export type SlackOptions = {
    /**
     * The Slack bot token.
     */
    botToken: string;
    /**
     * The Slack channel ID or name to post to.
     */
    channel: string;
};
export type SlackMessageResponse = {
    /**
     * Whether the request was successful.
     */
    ok: boolean;
    /**
     * The channel ID where the message was posted.
     */
    channel: string;
    /**
     * The timestamp of the message.
     */
    ts: string;
    /**
     * The message data.
     */
    message: SlackMessage;
};
export type SlackMessage = {
    /**
     * The text of the message.
     */
    text: string;
    /**
     * The user ID who posted the message.
     */
    user: string;
    /**
     * The timestamp of the message.
     */
    ts: string;
};
export type SlackErrorResponse = {
    /**
     * Whether the request was successful (false for errors).
     */
    ok: boolean;
    /**
     * The error code.
     */
    error: string;
};
export type SlackUploadURLResponse = {
    /**
     * Whether the request was successful.
     */
    ok: boolean;
    /**
     * The URL to upload the file to.
     */
    upload_url: string;
    /**
     * The file ID for completing the upload.
     */
    file_id: string;
};
export type SlackUploadCompleteResponse = {
    /**
     * Whether the request was successful.
     */
    ok: boolean;
    /**
     * The uploaded file information.
     */
    files: SlackFileInfo[];
};
export type SlackFileInfo = {
    /**
     * The file ID.
     */
    id: string;
    /**
     * The file title.
     */
    title: string;
    /**
     * The permanent link to the file.
     */
    permalink: string;
};
export type SlackUploadResponse = {
    /**
     * Whether the request was successful.
     */
    ok: boolean;
    /**
     * The uploaded file data.
     */
    file: SlackFile;
};
export type SlackFile = {
    /**
     * The file ID.
     */
    id: string;
    /**
     * The file name.
     */
    name: string;
    /**
     * The permanent link to the file.
     */
    permalink: string;
};