one/dist/esm/useLoader.js

One is a new React Framework that makes Vite serve both native and web.

import { useCallback, useSyncExternalStore } from "react";
import { registerDevtoolsFunction } from "./devtools/registry";
import { useParams, usePathname } from "./hooks";
import { findNearestNotFoundRoute, setNotFoundState } from "./notFoundState";
import { router } from "./router/imperative-api";
import { preloadedLoaderData, preloadingLoader, routeNode } from "./router/router";
import {
  subscribeToClientMatches,
  getClientMatchesSnapshot,
  updateMatchLoaderData
} from "./useMatches";
import { getLoaderPath } from "./utils/cleanUrl";
import { dynamicImport } from "./utils/dynamicImport";
import { weakKey } from "./utils/weakKey";
import { useServerContext } from "./vite/one-server-only";
const loaderTimingHistory = [], MAX_TIMING_HISTORY = 50, recordLoaderTiming = process.env.NODE_ENV === "development" ? (entry) => {
  loaderTimingHistory.unshift(entry), loaderTimingHistory.length > MAX_TIMING_HISTORY && loaderTimingHistory.pop(), typeof window < "u" && typeof CustomEvent < "u" && (window.dispatchEvent(new CustomEvent("one-loader-timing", { detail: entry })), entry.error && window.dispatchEvent(
    new CustomEvent("one-error", {
      detail: {
        error: {
          message: entry.error,
          name: "LoaderError"
        },
        route: {
          pathname: entry.path
        },
        timestamp: Date.now(),
        type: "loader"
      }
    })
  ));
} : void 0;
function getLoaderTimingHistory() {
  return loaderTimingHistory;
}
registerDevtoolsFunction("getLoaderTimingHistory", getLoaderTimingHistory);
registerDevtoolsFunction("recordLoaderTiming", recordLoaderTiming);
const loaderState = {}, subscribers = /* @__PURE__ */ new Set();
function updateState(path, updates) {
  loaderState[path] = { ...loaderState[path], ...updates }, subscribers.forEach((callback) => {
    callback();
  });
}
function subscribe(callback) {
  return subscribers.add(callback), () => subscribers.delete(callback);
}
function getLoaderState(path, preloadedData2) {
  return loaderState[path] || (loaderState[path] = {
    data: preloadedData2,
    error: void 0,
    promise: void 0,
    state: "idle",
    hasLoadedOnce: !!preloadedData2
  }), loaderState[path];
}
async function refetchLoader(pathname2) {
  const startTime2 = performance.now();
  updateState(pathname2, {
    state: "loading",
    error: null
  });
  try {
    const cacheBust = `${Date.now()}`, loaderJSUrl2 = getLoaderPath(pathname2, !0, cacheBust), moduleLoadStart2 = performance.now(), module2 = await dynamicImport(loaderJSUrl2)?.catch(() => null), moduleLoadTime2 = performance.now() - moduleLoadStart2;
    if (!module2?.loader) {
      updateState(pathname2, {
        data: void 0,
        state: "idle",
        hasLoadedOnce: !0
      });
      return;
    }
    const executionStart2 = performance.now(), result2 = await module2.loader(), executionTime2 = performance.now() - executionStart2, totalTime2 = performance.now() - startTime2;
    if (result2?.__oneRedirect) {
      recordLoaderTiming?.({
        path: pathname2,
        startTime: startTime2,
        moduleLoadTime: moduleLoadTime2,
        executionTime: executionTime2,
        totalTime: totalTime2,
        source: "refetch"
      }), updateState(pathname2, {
        data: void 0,
        state: "idle",
        hasLoadedOnce: !0
      }), router.replace(result2.__oneRedirect);
      return;
    }
    if (result2?.__oneError === 404) {
      recordLoaderTiming?.({
        path: pathname2,
        startTime: startTime2,
        moduleLoadTime: moduleLoadTime2,
        executionTime: executionTime2,
        totalTime: totalTime2,
        source: "refetch"
      });
      const notFoundRoute = findNearestNotFoundRoute(pathname2, routeNode);
      setNotFoundState({
        notFoundPath: result2.__oneNotFoundPath || "/+not-found",
        notFoundRouteNode: notFoundRoute || void 0,
        originalPath: pathname2
      });
      return;
    }
    updateState(pathname2, {
      data: result2,
      state: "idle",
      timestamp: Date.now(),
      hasLoadedOnce: !0
    });
    const currentMatches = getClientMatchesSnapshot(), pageMatch = currentMatches[currentMatches.length - 1], normalizedPathname = pathname2.replace(/\/$/, "") || "/", normalizedMatchPathname = (pageMatch?.pathname || "").replace(/\/$/, "") || "/";
    pageMatch && normalizedMatchPathname === normalizedPathname && updateMatchLoaderData(pageMatch.routeId, result2), recordLoaderTiming?.({
      path: pathname2,
      startTime: startTime2,
      moduleLoadTime: moduleLoadTime2,
      executionTime: executionTime2,
      totalTime: totalTime2,
      source: "refetch"
    });
  } catch (err) {
    const totalTime2 = performance.now() - startTime2;
    throw updateState(pathname2, {
      error: err,
      state: "idle"
    }), recordLoaderTiming?.({
      path: pathname2,
      startTime: startTime2,
      totalTime: totalTime2,
      error: err instanceof Error ? err.message : String(err),
      source: "refetch"
    }), err;
  }
}
process.env.NODE_ENV === "development" && typeof window < "u" && (window.__oneRefetchLoader = refetchLoader);
async function refetchMatchLoader(routeId, currentPath2) {
  const cacheBust = `${Date.now()}`, loaderJSUrl2 = getLoaderPath(currentPath2, !0, cacheBust), module2 = await dynamicImport(loaderJSUrl2)?.catch(() => null);
  if (!module2?.loader) return;
  const result2 = await module2.loader();
  result2?.__oneRedirect || result2?.__oneError || updateMatchLoaderData(routeId, result2);
}
function useLoaderState(loader) {
  const {
    loaderProps: loaderPropsFromServerContext,
    loaderData: loaderDataFromServerContext
  } = useServerContext() || {}, params = useParams(), pathname = usePathname(), currentPath = pathname.replace(/\/index$/, "").replace(/\/$/, "") || "/";
  if (typeof window > "u" && loader)
    return { data: useAsyncFn(
      loader,
      loaderPropsFromServerContext || {
        path: pathname,
        params
      }
    ), refetch: async () => {
    }, state: "idle" };
  const matchRouteId = loader ? (() => {
    const result2 = loader();
    return typeof result2 == "string" && result2.startsWith("./") ? result2 : null;
  })() : null, clientMatches = useSyncExternalStore(
    subscribeToClientMatches,
    getClientMatchesSnapshot,
    getClientMatchesSnapshot
  ), serverContextPath = loaderPropsFromServerContext?.path, preloadedData = serverContextPath === currentPath ? loaderDataFromServerContext : void 0, loaderStateEntry = useSyncExternalStore(
    subscribe,
    () => getLoaderState(currentPath, preloadedData),
    () => getLoaderState(currentPath, preloadedData)
  ), refetch = useCallback(() => refetchLoader(currentPath), [currentPath]);
  if (matchRouteId) {
    const match = clientMatches.find((m) => m.routeId === matchRouteId), isPageMatch = clientMatches.length > 0 && clientMatches[clientMatches.length - 1]?.routeId === matchRouteId, matchPathNormalized = (match?.pathname || "").replace(/\/$/, "") || "/", matchPathFresh = !isPageMatch || matchPathNormalized === currentPath;
    if (match && match.loaderData != null && matchPathFresh)
      return {
        data: match.loaderData,
        // refetch updates both loaderState (for useLoaderState() consumers without a loader)
        // and the match entry (for this component and useMatches consumers)
        refetch: async () => {
          await refetchLoader(currentPath);
          const fresh = loaderState[currentPath];
          fresh?.data != null && updateMatchLoaderData(matchRouteId, fresh.data);
        },
        state: loaderStateEntry.state
      };
  }
  if (!loader)
    return {
      refetch,
      state: loaderStateEntry.state
    };
  if (!loaderStateEntry.data && !loaderStateEntry.promise && !loaderStateEntry.hasLoadedOnce && loader) {
    const resolvedPreloadData = preloadedLoaderData[currentPath];
    if (resolvedPreloadData != null)
      delete preloadedLoaderData[currentPath], delete preloadingLoader[currentPath], loaderStateEntry.data = resolvedPreloadData, loaderStateEntry.hasLoadedOnce = !0;
    else if (preloadingLoader[currentPath]) {
      const promise2 = preloadingLoader[currentPath].then((val) => {
        delete preloadingLoader[currentPath], delete preloadedLoaderData[currentPath], val != null ? updateState(currentPath, {
          data: val,
          hasLoadedOnce: !0,
          promise: void 0
        }) : updateState(currentPath, {
          promise: void 0
        });
      }).catch((err) => {
        console.error("Error running loader()", err), delete preloadingLoader[currentPath], updateState(currentPath, {
          error: err,
          promise: void 0
        });
      });
      loaderStateEntry.promise = promise2;
    } else {
      const loadData = async () => {
        const startTime = performance.now();
        try {
          const loaderJSUrl = getLoaderPath(currentPath, !0), moduleLoadStart = performance.now(), module = await dynamicImport(loaderJSUrl)?.catch(() => null), moduleLoadTime = performance.now() - moduleLoadStart;
          if (!module?.loader) {
            updateState(currentPath, {
              data: void 0,
              hasLoadedOnce: !0,
              promise: void 0
            });
            return;
          }
          const executionStart = performance.now(), result = await module.loader(), executionTime = performance.now() - executionStart, totalTime = performance.now() - startTime;
          if (result?.__oneRedirect) {
            recordLoaderTiming?.({
              path: currentPath,
              startTime,
              moduleLoadTime,
              executionTime,
              totalTime,
              source: "initial"
            }), updateState(currentPath, {
              data: void 0,
              hasLoadedOnce: !0,
              promise: void 0
            }), router.replace(result.__oneRedirect);
            return;
          }
          if (result?.__oneError === 404) {
            recordLoaderTiming?.({
              path: currentPath,
              startTime,
              moduleLoadTime,
              executionTime,
              totalTime,
              source: "initial"
            });
            const notFoundRoute = findNearestNotFoundRoute(currentPath, routeNode);
            setNotFoundState({
              notFoundPath: result.__oneNotFoundPath || "/+not-found",
              notFoundRouteNode: notFoundRoute || void 0,
              originalPath: currentPath
            });
            return;
          }
          updateState(currentPath, {
            data: result,
            hasLoadedOnce: !0,
            promise: void 0
          }), recordLoaderTiming?.({
            path: currentPath,
            startTime,
            moduleLoadTime,
            executionTime,
            totalTime,
            source: "initial"
          });
        } catch (err) {
          const totalTime2 = performance.now() - startTime;
          updateState(currentPath, {
            error: err,
            promise: void 0
          }), recordLoaderTiming?.({
            path: currentPath,
            startTime,
            totalTime: totalTime2,
            error: err instanceof Error ? err.message : String(err),
            source: "initial"
          });
        }
      }, promise = loadData();
      loaderStateEntry.promise = promise;
    }
  }
  if (loader) {
    if (loaderStateEntry.error && !loaderStateEntry.hasLoadedOnce)
      throw loaderStateEntry.error;
    if (loaderStateEntry.data === void 0 && loaderStateEntry.promise && !loaderStateEntry.hasLoadedOnce)
      throw loaderStateEntry.promise;
    return {
      data: loaderStateEntry.data,
      refetch,
      state: loaderStateEntry.state
    };
  } else
    return {
      refetch,
      state: loaderStateEntry.state
    };
}
function useLoader(loader2) {
  const { data: data2 } = useLoaderState(loader2);
  return data2;
}
const results = /* @__PURE__ */ new Map(), started = /* @__PURE__ */ new Map();
function resetLoaderState() {
  results.clear(), started.clear();
}
function useAsyncFn(val, props) {
  const key = (val ? weakKey(val) : "") + JSON.stringify(props);
  if (val && !started.get(key)) {
    started.set(key, !0);
    let next = val(props);
    next instanceof Promise && (next = next.then((final) => {
      results.set(key, final);
    }).catch((err) => {
      console.error("Error running loader()", err), results.set(key, void 0);
    })), results.set(key, next);
  }
  const current = results.get(key);
  if (current instanceof Promise)
    throw current;
  return current;
}
export {
  getLoaderTimingHistory,
  refetchLoader,
  refetchMatchLoader,
  resetLoaderState,
  useLoader,
  useLoaderState
};
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