/**
 * Update to-do command payload definition.
 */
type Update = {
    /**
     * The Things URL scheme authorization token.
     */
    authToken: string;
    /**
     * The ID of the to-do to update.
     */
    id: string;
    /**
     * The title of the to-do. This will replace the existing title.
     */
    title?: string;
    /**
     * The notes of the to-do. This will replace the existing notes.
     */
    notes?: string;
    /**
     * Text to add before the existing notes of a to-do.
     */
    prependNotes?: string;
    /**
     * Text to add after the existing notes of a to-do.
     */
    appendNotes?: string;
    /**
     * Set the when field of a to-do. Possible values: today, tomorrow, evening, someday, a date string, or a date time string.
     */
    when?: string;
    /**
     * The deadline to apply to the to-do. Empty string to clear.
     */
    deadline?: string;
    /**
     * Comma separated strings corresponding to the titles of tags. Replaces all current tags.
     */
    tags?: string;
    /**
     * Comma separated strings corresponding to the titles of tags. Adds the specified tags to a to-do.
     */
    addTags?: string;
    /**
     * Set the checklist items of the to-do (maximum of 100), separated by new lines. Will replace all existing checklist items.
     */
    checklistItems?: string;
    /**
     * Add checklist items to the front of the list (maximum of 100), separated by new lines.
     */
    prependChecklistItems?: string;
    /**
     * Add checklist items to the end of the list (maximum of 100), separated by new lines.
     */
    appendChecklistItems?: string;
    /**
     * The ID of a project or area to move the to-do into. Takes precedence over list.
     */
    listId?: string;
    /**
     * The title of a project or area to move the to-do into. Ignored if list-id is present.
     */
    list?: string;
    /**
     * The ID of a heading within a project to move the to-do to. Takes precedence over heading.
     */
    headingId?: string;
    /**
     * The title of a heading within a project to move the to-do to. Ignored if heading-id is present.
     */
    heading?: string;
    /**
     * Complete a to-do or set a to-do to incomplete. Default: false.
     */
    completed?: boolean;
    /**
     * Cancel a to-do or set a to-do to incomplete. Default: false. Takes priority over completed.
     */
    canceled?: boolean;
    /**
     * Whether or not to navigate to and show the updated to-do. Default: false.
     */
    reveal?: boolean;
    /**
     * Set to true to duplicate the to-do before updating it. Default: false.
     */
    duplicate?: boolean;
    /**
     * Set the creation date for the to-do in the database.
     */
    creationDate?: string;
    /**
     * Set the completion date for the to-do in the database.
     */
    completionDate?: string;
};
/**
 * Update an existing to-do in Things.
 *
 * @param payload Update to-do command payload.
 * @returns Things update URL.
 * @example
 * update({ id: 'SyJEz273ceSkabUbciM73A', authToken: 'xxx', when: 'today' })
 * // => 'things:///update?id=SyJEz273ceSkabUbciM73A&auth-token=xxx&when=today'
 * @example
 * update({ id: 'SyJEz273ceSkabUbciM73A', authToken: 'xxx', title: 'Buy bread' })
 * // => 'things:///update?id=SyJEz273ceSkabUbciM73A&auth-token=xxx&title=Buy%20bread'
 * @example
 * update({ id: 'SyJEz273ceSkabUbciM73A', authToken: 'xxx', appendNotes: 'Wholemeal bread' })
 * // => 'things:///update?id=SyJEz273ceSkabUbciM73A&auth-token=xxx&append-notes=Wholemeal%20bread'
 * @example
 * update({ id: 'SyJEz273ceSkabUbciM73A', authToken: 'xxx', deadline: '' })
 * // => 'things:///update?id=SyJEz273ceSkabUbciM73A&auth-token=xxx'
 * @link https://culturedcode.com/things/support/articles/2803573/#update
 */
export declare function update(payload: Update): string;
export {};