@fortedigital/nextjs-cache-handler/dist/functions/functions.cjs

Next.js cache handlers

"use strict";
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
  // file that has been converted to a CommonJS file using a Babel-
  // compatible transform (i.e. "__esModule" has not been set), then set
  // "default" to the CommonJS "module.exports" for node compatibility.
  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
  mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/functions/functions.ts
var functions_exports = {};
__export(functions_exports, {
  neshClassicCache: () => neshClassicCache
});
module.exports = __toCommonJS(functions_exports);

// src/functions/nesh-classic-cache.ts
var import_strict = __toESM(require("assert/strict"), 1);
var import_node_crypto = require("crypto");
var import_work_async_storage_external = require("next/dist/server/app-render/work-async-storage.external.js");
var import_constants = require("next/dist/lib/constants");
function hashCacheKey(url) {
  const MAIN_KEY_PREFIX = "nesh-pages-cache-v1";
  const cacheString = JSON.stringify([MAIN_KEY_PREFIX, url]);
  return (0, import_node_crypto.createHash)("sha256").update(cacheString).digest("hex");
}
function serializeArguments(object) {
  return JSON.stringify(object);
}
function serializeResult(object) {
  return Buffer.from(JSON.stringify(object), "utf-8").toString("base64");
}
function deserializeResult(string) {
  return JSON.parse(Buffer.from(string, "base64").toString("utf-8"));
}
function neshClassicCache(callback, commonOptions) {
  if (commonOptions?.resultSerializer && !commonOptions?.resultDeserializer) {
    throw new Error(
      "neshClassicCache: if you provide a resultSerializer, you must provide a resultDeserializer."
    );
  }
  if (commonOptions?.resultDeserializer && !commonOptions?.resultSerializer) {
    throw new Error(
      "neshClassicCache: if you provide a resultDeserializer, you must provide a resultSerializer."
    );
  }
  const commonRevalidate = commonOptions?.revalidate ?? false;
  const commonArgumentsSerializer = commonOptions?.argumentsSerializer ?? serializeArguments;
  const commonResultSerializer = commonOptions?.resultSerializer ?? serializeResult;
  const commonResultDeserializer = commonOptions?.resultDeserializer ?? deserializeResult;
  async function cachedCallback(options, ...args) {
    const store = import_work_async_storage_external.workAsyncStorage.getStore();
    (0, import_strict.default)(
      !store?.incrementalCache,
      "neshClassicCache must be used in a Next.js Pages directory."
    );
    const cacheHandler = globalThis?.__incrementalCache?.cacheHandler;
    (0, import_strict.default)(
      cacheHandler,
      "neshClassicCache must be used in a Next.js Pages directory."
    );
    const {
      responseContext,
      tags = [],
      revalidate = commonRevalidate,
      cacheKey,
      argumentsSerializer = commonArgumentsSerializer,
      resultDeserializer = commonResultDeserializer,
      resultSerializer = commonResultSerializer
    } = options ?? {};
    (0, import_strict.default)(
      revalidate === false || revalidate > 0 && Number.isInteger(revalidate),
      "neshClassicCache: revalidate must be a positive integer or false."
    );
    responseContext?.setHeader(
      "Cache-Control",
      `public, s-maxage=${revalidate}, stale-while-revalidate`
    );
    const uniqueTags = /* @__PURE__ */ new Set();
    for (const tag of tags) {
      if (typeof tag === "string") {
        uniqueTags.add(tag);
      } else {
        console.warn(
          `neshClassicCache: Invalid tag: ${tag}. Skipping it. Expected a string.`
        );
      }
    }
    const allTags = Array.from(uniqueTags);
    const key = hashCacheKey(
      `nesh-classic-cache-${cacheKey ?? argumentsSerializer(args)}`
    );
    const cacheData = await cacheHandler.get(key, {
      revalidate,
      tags: allTags,
      kind: "FETCH",
      fetchUrl: "neshClassicCache"
    });
    if (cacheData?.value?.kind === "FETCH" && cacheData.lifespan && cacheData.lifespan.staleAt > Date.now() / 1e3) {
      return resultDeserializer(cacheData.value.data.body);
    }
    const data = await callback(...args);
    cacheHandler.set(
      key,
      {
        kind: "FETCH",
        data: {
          body: resultSerializer(data),
          headers: {},
          url: "neshClassicCache"
        },
        revalidate: revalidate || import_constants.CACHE_ONE_YEAR
      },
      {
        revalidate,
        tags,
        fetchCache: true,
        fetchUrl: "neshClassicCache"
      }
    );
    if (cacheData?.value?.kind === "FETCH" && cacheData?.lifespan && cacheData.lifespan.expireAt > Date.now() / 1e3) {
      return resultDeserializer(cacheData.value.data.body);
    }
    return data;
  }
  return cachedCallback;
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  neshClassicCache
});