/**
 * Per-(language, version) content-decoding helpers shared by the two
 * content-bearing reverse-projection families: pages (`project-pages.ts`)
 * and content items (`project-content.ts`). Both fan a per-language read
 * (`getItemPerLanguageBatch`) plus a historic per-version read
 * (`getItemAtVersionsBatch`) into one round trip each, then decode the
 * resulting snapshots into the recipe's `{ fieldName → ContentFieldValue }`
 * shape bucketed by storage axis.
 *
 * See `../read-current.ts` for the module-level contract.
 */
import type { AuthoringApiClient, RemoteItem } from "../../api/client.js";
import type { ContentFieldValue } from "../../schema/recipe.js";
import { type GuidHandleIndex, type TemplateFieldShapes } from "./helpers.js";
/**
 * Decode the per-(lang, version) authorable field values for one snapshot
 * into the recipe's `{ fieldName → ContentFieldValue }` shape. Fields whose
 * name doesn't resolve to a known shape (template hasn't been walked, or
 * a non-template field) are skipped — we'd be guessing the shape.
 */
export declare const decodeVersionedFieldsOf: (snapshot: RemoteItem, shapes: TemplateFieldShapes, guidIndex: GuidHandleIndex) => Record<string, ContentFieldValue>;
/**
 * Decode the item-level `storage: shared` fields. Aggregated across pass 1's
 * results — shared values are language-agnostic, so the first occurrence
 * wins. (`storage: unversioned` is treated as `versioned` from the recipe's
 * perspective: it lives per-language and round-trips as a translation/version
 * field, not a shared one.)
 */
export declare const collectSharedFields: (populated: ReadonlyArray<{
    item: RemoteItem | null;
}>, shapes: TemplateFieldShapes, guidIndex: GuidHandleIndex) => Record<string, ContentFieldValue>;
/** Read the per-version `__Created` date and decode to ISO datetime. */
export declare const dateOfSnapshot: (snapshot: RemoteItem) => string | undefined;
/**
 * Per-(language, version) historic snapshot fan-out. Requests every version
 * below each language's latest (the latest came back in pass 1) in a single
 * batched round trip, then indexes the results by `language|version`.
 */
export declare const fetchHistoricSnapshots: (item: RemoteItem, populated: ReadonlyArray<{
    language: string;
    versions: number[];
}>, client: AuthoringApiClient) => Promise<Map<string, RemoteItem>>;