优化小票打印新增餐位费和打包费

electron/main.js

@@ -6,8 +6,33 @@ import os from "os";
 import fs from "fs";
 import { exec } from "child_process";
 
+// ===== 核心配置：单文件缓存 =====
+// 固定的缓存文件路径（永远只存这1个文件）
+const CACHE_LOGO_PATH = path.join(app.getPath("temp"), "yinshouke_print", "cache_logo.png");
+// 记录上次的Logo URL（用于对比）
+let lastLogoUrl = "";
+
+// 1. 初始化缓存目录（应用启动时执行）
+const initLogoCacheDir = () => {
+  const cacheDir = path.dirname(CACHE_LOGO_PATH);
+  if (!fs.existsSync(cacheDir)) {
+    fs.mkdirSync(cacheDir, { recursive: true });
+  }
+  // 清理目录下除了cache_logo.png之外的所有文件（应用启动时）
+  if (fs.existsSync(cacheDir)) {
+    fs.readdirSync(cacheDir).forEach(file => {
+      const filePath = path.join(cacheDir, file);
+      if (filePath !== CACHE_LOGO_PATH) {
+        fs.unlinkSync(filePath);
+        console.log("启动清理：删除历史残留Logo文件", filePath);
+      }
+    });
+  }
+};
+
 let win;
 app.whenReady().then(() => {
+  initLogoCacheDir();
   win = new BrowserWindow({
     title: "银收客",
     width: 1024,
@@ -220,6 +245,51 @@ app.whenReady().then(() => {
   //   });
   // });
 
+  // 2. 下载/复用Logo（核心函数）
+  const getCachedLogoPath = async (logoUrl) => {
+    // 情况1：Logo URL为空 → 用默认Logo
+    if (!logoUrl || !logoUrl.startsWith('http')) {
+      return "./logo.png";
+    }
+
+    // 情况2：Logo URL和上次一致 → 直接用缓存文件
+    if (logoUrl === lastLogoUrl && fs.existsSync(CACHE_LOGO_PATH)) {
+      console.log("Logo未变化，复用本地缓存");
+      return CACHE_LOGO_PATH;
+    }
+
+    // 情况3：Logo URL变化 → 删除旧缓存，下载新的
+    try {
+      // 删除旧缓存（如果存在）
+      if (fs.existsSync(CACHE_LOGO_PATH)) {
+        fs.unlinkSync(CACHE_LOGO_PATH);
+        console.log("Logo已更新，删除旧缓存文件");
+      }
+
+      // 下载新Logo到固定缓存路径
+      const response = await axios({
+        url: logoUrl,
+        method: "GET",
+        responseType: "stream",
+      });
+
+      await new Promise((resolve, reject) => {
+        const writer = fs.createWriteStream(CACHE_LOGO_PATH);
+        response.data.pipe(writer);
+        writer.on("finish", resolve);
+        writer.on("error", reject);
+      });
+
+      // 更新上次的Logo URL记录
+      lastLogoUrl = logoUrl;
+      console.log("新Logo下载完成，缓存路径：", CACHE_LOGO_PATH);
+      return CACHE_LOGO_PATH;
+    } catch (error) {
+      console.error("下载新Logo失败，使用默认Logo：", error);
+      return "./logo.png";
+    }
+  };
+
   // 标签小票的窗口
   const tagPrintWin = new BrowserWindow({
     show: false,
@@ -228,7 +298,11 @@ app.whenReady().then(() => {
     webPreferences: {
       nodeIntegration: true,
       contextIsolation: false,
+      // 允许访问本地文件（关键）
+      webSecurity: false,
     },
+    // 新增2：禁止后台节流，隐藏窗口也能加载资源
+    backgroundThrottling: false,
   });
 
   if (process.env.VITE_DEV_SERVER_URL) {
@@ -239,37 +313,32 @@ app.whenReady().then(() => {
   }
 
   // 接收渲染进程发送的数据
-  ipcMain.on("printerTagSync", (event, arg) => {
-    console.log(arg);
-    tagPrintWin.webContents.send("getParams", arg);
+  ipcMain.on("printerTagSync", async (event, arg) => {
+    console.log("接收打印参数：", arg);
+    const data = JSON.parse(arg);
+
+    // ===== 核心：获取缓存的Logo路径 =====
+    const logoPath = await getCachedLogoPath(data.ticketLogo);
+    data.ticketLogo = logoPath; // 替换为本地缓存路径
+
+    // 传给打印窗口
+    tagPrintWin.webContents.send("getParams", JSON.stringify(data));
   });
 
   // 执行标签小票的打印操作
   ipcMain.on("printTagStart", (event, arg) => {
-    // console.log(arg);
     const _parmas = JSON.parse(arg);
-    // console.log(_parmas)
     let name = _parmas.deviceName;
     tagPrintWin.webContents.print({
       silent: true,
       deviceName: name,
-      pageSize: {
-        width: 45000,
-        height: 30000,
-      },
+      pageSize: { width: 45000, height: 30000 },
       scaleFactor: 80,
       landscape: false,
-      margins: {
-        marginType: "none",
-        top: 0,
-        bottom: 0,
-        left: 0,
-        right: 0,
-      },
-      dpi: {
-        horizontal: 203,
-        vertical: 203,
-      },
+      margins: { marginType: "none", top: 0, bottom: 0, left: 0, right: 0 },
+      dpi: { horizontal: 203, vertical: 203 },
+      // 新增：必须开启，否则图片打印不出来
+      printBackground: true
     });
   });