graphql-mocks
Version:
Tools for setting up graphql test resolvers
48 lines (47 loc) • 1.49 kB
JavaScript
import { applyCursorsToEdges } from './apply-cursor-to-edges.mjs';
import { createEdge } from './create-edge.mjs';
function paginateNodes(nodes, args, cursorForNode) {
var _edges$, _edges;
var {
first,
last,
before,
after
} = args;
var allEdges = nodes.map(node => createEdge(node, cursorForNode(node)));
// eslint-disable-next-line prefer-const
var {
edges,
frontCut,
backCut
} = applyCursorsToEdges(allEdges, cursorForNode, before, after);
var hasNextPage = backCut;
var hasPreviousPage = frontCut;
if (first) {
if (first < 0) throw new Error('`first` argument must be greater than or equal to 0');
if (edges.length > first) {
edges = edges.slice(0, first);
hasNextPage = true;
}
}
if (last) {
if (last < 0) throw new Error('`last` argument must be greater than or equal to 0');
if (edges.length > last) {
edges = edges.slice(edges.length - last, edges.length);
hasPreviousPage = true;
}
}
var startNode = (_edges$ = edges[0]) === null || _edges$ === void 0 ? void 0 : _edges$.node;
var endNode = (_edges = edges[edges.length - 1]) === null || _edges === void 0 ? void 0 : _edges.node;
return {
edges: edges,
pageInfo: {
hasNextPage,
hasPreviousPage,
startCursor: startNode ? cursorForNode(startNode) : null,
endCursor: endNode ? cursorForNode(endNode) : null
}
};
}
export { paginateNodes };
//# sourceMappingURL=paginate-nodes.mjs.map