1 line
14 KiB
JSON
1 line
14 KiB
JSON
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{"ast":null,"code":"// src/infiniteQueryBehavior.ts\nimport { addToEnd, addToStart, ensureQueryFn } from \"./utils.js\";\nfunction infiniteQueryBehavior(pages) {\n return {\n onFetch: (context, query) => {\n const options = context.options;\n const direction = context.fetchOptions?.meta?.fetchMore?.direction;\n const oldPages = context.state.data?.pages || [];\n const oldPageParams = context.state.data?.pageParams || [];\n let result = {\n pages: [],\n pageParams: []\n };\n let currentPage = 0;\n const fetchFn = async () => {\n let cancelled = false;\n const addSignalProperty = object => {\n Object.defineProperty(object, \"signal\", {\n enumerable: true,\n get: () => {\n if (context.signal.aborted) {\n cancelled = true;\n } else {\n context.signal.addEventListener(\"abort\", () => {\n cancelled = true;\n });\n }\n return context.signal;\n }\n });\n };\n const queryFn = ensureQueryFn(context.options, context.fetchOptions);\n const fetchPage = async (data, param, previous) => {\n if (cancelled) {\n return Promise.reject();\n }\n if (param == null && data.pages.length) {\n return Promise.resolve(data);\n }\n const queryFnContext = {\n queryKey: context.queryKey,\n pageParam: param,\n direction: previous ? \"backward\" : \"forward\",\n meta: context.options.meta\n };\n addSignalProperty(queryFnContext);\n const page = await queryFn(queryFnContext);\n const {\n maxPages\n } = context.options;\n const addTo = previous ? addToStart : addToEnd;\n return {\n pages: addTo(data.pages, page, maxPages),\n pageParams: addTo(data.pageParams, param, maxPages)\n };\n };\n if (direction && oldPages.length) {\n const previous = direction === \"backward\";\n const pageParamFn = previous ? getPreviousPageParam : getNextPageParam;\n const oldData = {\n pages: oldPages,\n pageParams: oldPageParams\n };\n const param = pageParamFn(options, oldData);\n result = await fetchPage(oldData, param, previous);\n } else {\n const remainingPages = pages ?? oldPages.length;\n do {\n const param = currentPage === 0 ? oldPageParams[0] ?? options.initialPageParam : getNextPageParam(options, result);\n if (currentPage > 0 && param == null) {\n break;\n }\n result = await fetchPage(result, param);\n currentPage++;\n } while (currentPage < remainingPages);\n }\n return result;\n };\n if (context.options.persister) {\n context.fetchFn = () => {\n return context.options.persister?.(fetchFn, {\n queryKey: context.queryKey,\n meta: context.options.meta,\n signal: context.signal\n }, query);\n };\n } else {\n context.fetchFn = fetchFn;\n }\n }\n };\n}\nfunction getNextPageParam(options, {\n pages,\n pageParams\n}) {\n const lastIndex = pages.length - 1;\n return pages.length > 0 ? options.getNextPageParam(pages[lastIndex], pages, pageParams[lastIndex], pageParams) : void 0;\n}\nfunction getPreviousPageParam(options, {\n pages,\n pageParams\n}) {\n return pages.length > 0 ? options.getPreviousPageParam?.(pages[0], pages, pageParams[0], pageParams) : void 0;\n}\nfunction hasNextPage(options, data) {\n if (!data) return false;\n return getNextPageParam(options, data) != null;\n}\nfunction hasPreviousPage(options, data) {\n if (!data || !options.getPreviousPageParam) return false;\n return getPreviousPageParam(options, data) != null;\n}\nexport { hasNextPage, hasPreviousPage, infiniteQueryBehavior
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