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import { isNullOrEmpty } from "../../foundation/json-parsing/server-data";
import { currentPosition } from "../metrics/helpers/location";
/**
* Opaque token to use for paginating a list of search results.
* This is used for both standard and segmented search results.
*/
export class SearchToken {
}
/// The number of results to load per page.
const suggestedMaxResutsPerPage = 30;
/**
* Create a search token for loading more search results.
* @param results Remaining set of data that is yet to be paginated
* @param requestMetadata The nature of request that was fired.
* @param responseMetadata The meta blob returned as part of initial search. This is preserved, as subsequent pagination requests don't hit search endpoints.
* @param metricsOptions Metrics options to preserve during pagination
*/
export function createSearchToken(objectGraph, results, requestMetadata, responseMetadata, metricsOptions) {
if (isNullOrEmpty(results)) {
return null;
}
return {
results: results,
maxPerPage: suggestedMaxResutsPerPage,
requestMetadata: requestMetadata,
metricsOptions: metricsOptions,
responseMetadata: responseMetadata !== null && responseMetadata !== void 0 ? responseMetadata : {},
contentOffsetWithinResultsShelf: currentPosition(metricsOptions.locationTracker),
};
}
/**
* Returns the next set of items to load.
* @param searchToken Search token used for paginating.
*/
export function getNextItemsToFetch(objectGraph, searchToken) {
if (!searchToken || !searchToken.results) {
return [];
}
return searchToken.results.slice(0, searchToken.maxPerPage);
}
/**
* Advance the search token by the items that were loaded, consistent with `getNextItemsToFetch`
* @param searchToken Search token to create new token with.
*/
export function advanceSearchTokenResults(objectGraph, searchToken) {
let nextPageResults = [];
if (searchToken && searchToken.results) {
nextPageResults = searchToken.results.slice(searchToken.maxPerPage, searchToken.results.length);
}
if (isNullOrEmpty(nextPageResults)) {
return null;
}
const nextToken = { ...searchToken };
nextToken.results = nextPageResults;
return nextToken;
}
//# sourceMappingURL=search-token.js.map
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