/**
 * @fileoverview Normalizes a raw `NtfyMessage` poll envelope into the shape the
 * MCP surfaces hand back: Unix-second timestamps converted to ISO 8601 strings
 * and long bodies truncated to a bounded length unless the caller opts out.
 * Lives in the service layer so `ntfy_fetch_messages` and the `ntfy://{topic}`
 * resource — peers, not dependents — normalize identically instead of one
 * importing the other's internals.
 * @module services/ntfy/message-shape
 */
import type { MessageEvent, NtfyAction, NtfyAttachment, NtfyMessage, Priority } from './types.js';
/** Character budget for a returned message body; the rest is reported as a count. */
export declare const MESSAGE_TRUNCATE_AT = 500;
/** A `NtfyMessage` with ISO 8601 timestamps and a length-bounded body. */
export interface ShapedNtfyMessage {
    actions?: NtfyAction[] | undefined;
    attachment?: NtfyAttachment | undefined;
    click?: string | undefined;
    event: MessageEvent;
    expires?: string | undefined;
    id: string;
    message?: string | undefined;
    /** Count of characters dropped from `message`; absent when nothing was cut. */
    messageTruncated?: number | undefined;
    priority?: Priority | undefined;
    sequence_id?: string | undefined;
    tags?: string[] | undefined;
    time: string;
    title?: string | undefined;
    topic: string;
}
/**
 * Normalize one polled message. Callers filter the connection-level `open` /
 * `keepalive` frames out before shaping, so the narrower `MessageEvent` holds.
 *
 * @param raw - The upstream poll envelope.
 * @param opts.truncateBody - Cap the body at `MESSAGE_TRUNCATE_AT` (default
 *   `true`). Pass `false` to return the whole body with no `messageTruncated`
 *   count — only safe where the result set is pinned to a single message.
 */
export declare function shapeMessage(raw: NtfyMessage, opts?: {
    truncateBody?: boolean;
}): ShapedNtfyMessage;
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