ビルド出来るように修正

jest.config.mjs

@@ -0,0 +1,6 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+export default {
+  preset: "ts-jest",
+  extensionsToTreatAsEsm: [".ts"],
+  testEnvironment: "node",
+};

package.json

@@ -2,6 +2,7 @@
   "name": "narou",
   "version": "0.8.1",
   "description": "Narou API Wrapper",
+  "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "module": "dist/index.mjs",
@@ -48,7 +49,7 @@
     "eslint-config-prettier": "^9.0.0",
     "eslint-plugin-prettier": "^5.0.1",
     "jest": "^29.7.0",
-    "node-fetch": "^3.3.2",
+    "node-fetch": "^2.7.0",
     "npm-run-all": "^4.1.5",
     "prettier": "^3.0.3",
     "ts-jest": "^29.1.1",

src/narou-fetch.ts

@@ -1,13 +1,13 @@
-import nodeFetch from "node-fetch";
-
 import { unzipp } from "./util/unzipp";
 import NarouNovel, { NarouParams } from "./narou";
 
+type Fetch = typeof fetch;
+
 /**
  * なろう小説APIへのリクエストを実行する
  */
 export default class NarouNovelFetch extends NarouNovel {
-  constructor(private fetch = nodeFetch) {
+  constructor(private fetch: Fetch = require('node-fetch')) {
     super();
   }
 
@@ -34,15 +34,7 @@ export default class NarouNovelFetch extends NarouNovel {
       return (await res.json()) as T;
     }
 
-    const buffer = await res.buffer();
-    try {
-      return await unzipp(buffer);
-    } catch {
-      try {
-        throw JSON.stringify(buffer.toString());
-      } catch {
-        throw buffer.toString();
-      }
-    }
+    const buffer = await res.arrayBuffer();
+    return await unzipp(buffer);
   }
 }

src/ranking-history.ts

@@ -1,4 +1,4 @@
-import parse from "date-fns/parse";
+import { parse } from "date-fns";
 import { RankingType } from "./params";
 
 const dateFormat = "yyyyMMdd";

src/ranking.ts

@@ -1,7 +1,6 @@
 import { NarouRankingResult, RankingResult } from "./narou-ranking-results";
 import SearchBuilder, { DefaultSearchResultFields } from "./search-builder";
-import addDays from "date-fns/addDays";
-import format from "date-fns/format";
+import { addDays, format } from "date-fns";
 import {
   Fields,
   GzipLevel,

src/util/unzipp.ts

@@ -3,7 +3,17 @@ import { promisify } from "util";
 
 const gunzipAsync = promisify<InputType, Buffer>(gunzip);
 
-export async function unzipp(data: InputType) {
-  const buffer = await gunzipAsync(data);
-  return JSON.parse(buffer.toString());
+const decoder = new TextDecoder()
+export async function unzipp(data: ArrayBuffer) {
+  try {
+    const buffer = await gunzipAsync(data);
+    try {
+      return JSON.parse(decoder.decode(buffer));
+    } catch {
+      throw decoder.decode(buffer);
+    }
+  } catch (e) {
+    if (typeof e === "string") throw e;
+    throw decoder.decode(data);
+  }
 }