import type { Property } from "@rebasepro/types";
/**
 * Whether a property can stand in for a record in *one line*.
 *
 * Preview surfaces — the reference card, a list row, a board card — have a
 * single line per property and no way to grow. That is a constraint on the
 * *value*, not on the property's importance: a Markdown biography is the most
 * interesting column on an author, and it is still the wrong thing to paste
 * into a 44px card. Ranking it here means the picker can skip it without
 * anyone having to configure their way out of a broken card.
 *
 * Kept beside {@link getTitlePropertyCandidates} because the two answer
 * neighbouring questions — "what is this record called" and "what else can be
 * said about it in a line" — from the same property schema.
 *
 * @group Collections
 */
export declare const SUMMARY_RANK: {
    /**
     * No single-line form exists. A map renders as a key/value table and an
     * array of maps as a stack of them; there is no first line to take.
     */
    readonly UNUSABLE: 0;
    /**
     * Readable in one line, but only as an excerpt — the property holds a
     * document, and the line is its opening. Worth showing when nothing better
     * is available, never in preference to a value that fits whole.
     */
    readonly EXCERPT: 1;
    /** Short and self-contained: the line *is* the value. */
    readonly DIRECT: 2;
};
/** One of the three summary ranks. */
export type SummaryRank = typeof SUMMARY_RANK[keyof typeof SUMMARY_RANK];
/**
 * File-storage backed content (single image, array of images, generic upload…).
 * Preview surfaces give these their own image slot, so they are never also a
 * text line.
 *
 * @group Collections
 */
export declare function isStorageProperty(property: Property | undefined): boolean;
/**
 * True when the property holds free text long enough to be a document rather
 * than a value — Markdown, or an explicitly multi-line string.
 *
 * @group Collections
 */
export declare function isLongTextProperty(property: Property | undefined): boolean;
/**
 * How well a property reads as one line of a preview. See {@link SUMMARY_RANK}.
 *
 * Decided from the property *schema* only: no values are consulted, so the
 * answer is stable for a collection and can be memoised per collection rather
 * than per row.
 *
 * @group Collections
 */
export declare function rankSummaryProperty(property: Property | undefined): SummaryRank;
/**
 * True when the property has any single-line form at all.
 *
 * @group Collections
 */
export declare function canSummariseProperty(property: Property | undefined): boolean;