/**
 * Minimal, dependency-free parsing helpers for CalDAV wire formats.
 *
 * Two things are parsed here:
 *   1. WebDAV multistatus XML (the envelope every PROPFIND/REPORT response
 *      comes back in) into a flat list of `{ href, status, props }` records.
 *   2. The iCalendar (`text/calendar`) payload carried inside a
 *      `calendar-data` prop, into simple VEVENT records.
 *
 * No XML library is used. CalDAV servers only ever send a small, predictable
 * subset of XML (no CDATA sections, no processing instructions inside the
 * body, no mixed content beyond text + a handful of known child elements), so
 * a focused regex/state parser over that subset is enough, this mirrors how
 * the rest of the agent parses constrained wire formats (see
 * `src/agent/email/imap-client.ts`).
 *
 * Everything here is defensive: malformed or unexpected input yields empty
 * results, never a thrown exception. Real servers disagree on namespace
 * prefixes (`d:`, `D:`, `cal:`, `caldav:`, or none at all), so every lookup
 * matches on the element's local name and ignores whatever prefix is in
 * front of it.
 */
/** One `<response>` entry from a multistatus document, flattened. */
export interface DavMultistatusEntry {
    readonly href: string;
    /** The raw `<status>` text of the propstat used for `props` (e.g. "HTTP/1.1 200 OK"). */
    readonly status: string;
    readonly props: Readonly<Record<string, string>>;
}
/**
 * Parses a WebDAV multistatus XML body into one flattened entry per
 * `<response>`. Each entry carries whichever of `current-user-principal`,
 * `calendar-home-set`, `displayname`, `resourcetype`, `getetag`, and
 * `calendar-data` were present, keyed under exactly those names.
 *
 * When a response has more than one `<propstat>` (a mix of successful and
 * failed property lookups, e.g. a 200 batch plus a 404 batch), only the
 * `200`-status propstat(s) contribute properties; `status` reflects that
 * outcome. If none reports 200, every propstat is scanned anyway so a
 * caller still gets whatever was returned instead of nothing.
 *
 * Never throws: malformed input yields an empty array.
 */
export declare function parseMultistatus(xml: string): DavMultistatusEntry[];
/** True when a parsed `resourcetype` prop value (comma-joined local names) denotes a calendar collection. */
export declare function isCalendarResourceType(resourceTypeValue: string | undefined): boolean;
/** One parsed VEVENT. `rrule` is the raw RRULE value, never expanded here. */
export interface CalDavEventRecord {
    readonly uid: string;
    readonly summary: string;
    /** Raw DTSTART value, e.g. "20260101T100000Z" or "20260101" for all-day. */
    readonly dtstart: string;
    /** Raw DTEND value; empty string when the event has no DTEND. */
    readonly dtend: string;
    readonly allDay: boolean;
    readonly location?: string;
    /** DTSTART's TZID parameter, when present (not applicable to UTC/all-day values). */
    readonly tzid?: string;
    readonly rrule?: string;
}
/**
 * Unfolds RFC 5545 folded lines: a CRLF (or bare LF/CR, servers are not all
 * strict) followed immediately by a single space or tab is a continuation
 * marker, not a line break. Removing exactly that newline-plus-one-character
 * sequence rejoins the folded line; anything after the fold point on the
 * continuation line is real content and must be preserved untouched.
 */
export declare function unfoldIcsLines(raw: string): string;
/**
 * Parses every VEVENT block out of a raw iCalendar (`calendar-data`) payload.
 * Handles line unfolding first, then walks BEGIN:VEVENT/END:VEVENT blocks.
 * Events without a UID are dropped (UID is the only property this module
 * treats as mandatory). Never throws: malformed input yields an empty array.
 */
export declare function parseCalendarDataEvents(calendarData: string): CalDavEventRecord[];
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