refactor: 重构lib代码（无实质性功能更新，可不更新）

lib/download/const.js

@@ -0,0 +1,18 @@
+import path from 'path';
+import { imageResourcesPath } from '../path.js';
+
+export const ZZZ_SQUARE_AVATAR_PATH = path.join(
+    imageResourcesPath,
+    'square_avatar'
+  ),
+  ZZZ_SMALL_SQUARE_AVATAR_PATH = path.join(imageResourcesPath, 'role_general'),
+  ZZZ_SQUARE_BANGBOO_PATH = path.join(
+    imageResourcesPath,
+    'bangboo_square_avatar'
+  ),
+  ZZZ_WEAPON_PATH = path.join(imageResourcesPath, 'weapon'),
+  ZZZ_ROLE_PATH = path.join(imageResourcesPath, 'role'),
+  ZZZ_ROLE_CIRCLE_PATH = path.join(imageResourcesPath, 'role_circle'),
+  ZZZ_SUIT_3D_PATH = path.join(imageResourcesPath, 'suit_3d'),
+  ZZZ_SUIT_PATH = path.join(imageResourcesPath, 'suit');
+// const ZZZ_GUIDES_PATH = path.join(imageResourcesPath, 'guides');

lib/download/core.js

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+import path from 'path';
+import fs from 'fs';
+import request from '../../utils/request.js';
+
+/**
+ * 下载文件
+ * @param {string} url 下载地址
+ * @param {string} savePath 保存路径
+ * @returns {Promise<string | null>} 保存路径
+ */
+export const downloadFile = async (url, savePath) => {
+  // 下载文件
+  try {
+    const download = await request(url, {}, 5);
+    const arrayBuffer = await download.arrayBuffer();
+    const buffer = Buffer.from(arrayBuffer);
+    // 保存文件
+    if (!fs.existsSync(path.dirname(savePath))) {
+      fs.mkdirSync(path.dirname(savePath), { recursive: true });
+    }
+    fs.writeFileSync(savePath, buffer);
+    // 返回保存路径
+    return savePath;
+  } catch (error) {
+    return null;
+  }
+};
+
+/**
+ * 查看文件是否存在，如果存在则返回路径，否则下载文件
+ * @param {string} url 下载地址
+ * @param {string} savePath 保存路径
+ * @returns {Promise<string | null>} 保存路径
+ */
+export const checkFile = async (url, savePath) => {
+  if (fs.existsSync(savePath)) {
+    const stats = fs.statSync(savePath);
+    if (stats.size > 0) {
+      return savePath;
+    }
+  }
+  const download = await downloadFile(url, savePath);
+  return download;
+};

lib/download/download.js

@@ -0,0 +1,57 @@
+import path from 'path';
+import { checkFile } from './core.js';
+import { getResourceRemotePath } from '../assets.js';
+import * as MysURL from '../mysapi/api.js';
+import * as LocalURI from './const.js';
+/**
+ * 下载米游社图片
+ * @param {keyof MysURL} base 远程地址
+ * @param {keyof LocalURI} localBase 本地地址
+ * @param {string} filename 文件名
+ * @param {keyof MysURL} newBase 新远程地址
+ */
+export const downloadMysImage = async (
+  base,
+  localBase,
+  filename,
+  newBase = ''
+) => {
+  base = MysURL[base];
+  localBase = LocalURI[localBase];
+  if (!!newBase) {
+    newBase = MysURL[newBase];
+  }
+  const finalPath = path.join(localBase, filename);
+  let url = `${base}/${filename}`;
+  let result = await checkFile(url, finalPath);
+  if (!result && !!newBase) {
+    url = `${newBase}/${filename}`;
+    result = await checkFile(url, finalPath);
+  }
+  return result;
+};
+
+/**
+ * 下载资源库图片
+ *  @param {Parameters<getResourceRemotePath>[0]} remoteLabel 远程地址
+ *  @param {keyof LocalURI} localBase 本地地址
+ *  @param {string} filename 文件名
+ *  @param {string} replaceFilename 替换文件名(如果资源不存在)
+ */
+export const downloadResourceImage = async (
+  remoteLabel,
+  localBase,
+  filename,
+  replaceFilename = ''
+) => {
+  localBase = LocalURI[localBase];
+  const finalPath = path.join(localBase, filename);
+  const url = await getResourceRemotePath(remoteLabel, filename);
+  let result = await checkFile(url, finalPath);
+  if (!result && !!replaceFilename) {
+    const finalPath = path.join(localBase, replaceFilename);
+    const url = await getResourceRemotePath(remoteLabel, replaceFilename);
+    result = await checkFile(url, finalPath);
+  }
+  return result;
+};