From 2dca793fa4314f6f9b899d7df943846f9c559e34 Mon Sep 17 00:00:00 2001
From: LCJ-MinYa <1049468118@qq.com>
Date: Thu, 7 Nov 2024 17:57:22 +0800
Subject: [PATCH 1/2] =?UTF-8?q?feat:=20=E5=8E=8B=E7=BC=A9=E5=9B=BE?=
 =?UTF-8?q?=E7=89=87?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/product_cover_img.js |  5 +++++
 src/reduce_img_size.js   | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 src/reduce_img_size.js

diff --git a/src/product_cover_img.js b/src/product_cover_img.js
index 5a76590..8d4188d 100644
--- a/src/product_cover_img.js
+++ b/src/product_cover_img.js
@@ -15,6 +15,11 @@ if (!inputDir || !previewDir) {
 //创建输出文件夹
 cover.scaleArr.forEach((item) => {
     item.dir = `${inputDir}/${item.scale.join('x')}`;
+    // 如果之前存在生成的主图文件夹，先删除
+    if (fs.existsSync(item.dir)) {
+        fs.rmSync(item.dir, { recursive: true, force: true });
+    }
+    // 删除后再重新生成新的空文件夹
     if (!fs.existsSync(item.dir)) {
         fs.mkdirSync(item.dir);
     }
diff --git a/src/reduce_img_size.js b/src/reduce_img_size.js
new file mode 100644
index 0000000..8658201
--- /dev/null
+++ b/src/reduce_img_size.js
@@ -0,0 +1,36 @@
+const sharp = require('sharp');
+const fs = require('fs');
+const path = require('path');
+const { getInputDir } = require('../utils/index');
+const { cover } = require('../config/index');
+
+//工作目录文件夹路径
+let inputDir = getInputDir();
+const previewDir = `${inputDir}/预览图`;
+if (!inputDir || !previewDir) {
+    console.log('未执行裁剪主图功能，工作目录不存在');
+    return;
+}
+
+async function reduceImgSize(imgPath, tempImgPath) {
+    let { width } = await sharp(imgPath).metadata();
+    const size = fs.statSync(imgPath).size;
+    const fileSizeInMB = size / (1024 * 1024); // 将字节转换为 MB
+    console.log(width, fileSizeInMB);
+    // .resize(800) // 调整图片宽度为 800 像素
+    // .jpeg({ quality: 80 }) // 设置 JPEG 格式的质量为 80%
+    // .toFile('output.jpg', (err, info) => {
+    //     if (err) throw err;
+    //     console.log('图片已成功压缩:', info);
+    // });
+}
+
+fs.readdirSync(previewDir).forEach(async (file) => {
+    const ext = file.split('.').pop().toLowerCase();
+    if (cover.imgFormat.has(ext)) {
+        const imgPath = path.join(previewDir, file);
+        const tempImgPath = path.join(previewDir, `${file}_temp`);
+
+        reduceImgSize(imgPath, tempImgPath);
+    }
+});

From e20727378c229020be6f1630c8f90b00009b8a0a Mon Sep 17 00:00:00 2001
From: LCJ-MinYa <1049468118@qq.com>
Date: Fri, 8 Nov 2024 11:55:51 +0800
Subject: [PATCH 2/2] =?UTF-8?q?feat:=20=E5=8E=8B=E7=BC=A9=E5=9B=BE?=
 =?UTF-8?q?=E7=89=87?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/reduce_img_size.js | 52 ++++++++++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 12 deletions(-)

diff --git a/src/reduce_img_size.js b/src/reduce_img_size.js
index 8658201..ca17f77 100644
--- a/src/reduce_img_size.js
+++ b/src/reduce_img_size.js
@@ -12,25 +12,53 @@ if (!inputDir || !previewDir) {
     return;
 }
 
-async function reduceImgSize(imgPath, tempImgPath) {
+async function reduceImgSize(imgPath, tempImgPath, size) {
     let { width } = await sharp(imgPath).metadata();
-    const size = fs.statSync(imgPath).size;
-    const fileSizeInMB = size / (1024 * 1024); // 将字节转换为 MB
-    console.log(width, fileSizeInMB);
-    // .resize(800) // 调整图片宽度为 800 像素
-    // .jpeg({ quality: 80 }) // 设置 JPEG 格式的质量为 80%
-    // .toFile('output.jpg', (err, info) => {
-    //     if (err) throw err;
-    //     console.log('图片已成功压缩:', info);
-    // });
+    if (size > 3 && size < 5) {
+        console.log('压缩方式1');
+        return sharp(imgPath).jpeg({ quality: 90 }).toFile(tempImgPath);
+    }
+
+    if (size >= 5 && size < 10) {
+        console.log('压缩方式2');
+        return sharp(imgPath)
+            .resize(width / 1.2)
+            .jpeg({ quality: 90 })
+            .toFile(tempImgPath);
+    }
+    if (size >= 10) {
+        console.log('压缩方式3');
+        return sharp(imgPath)
+            .resize(width / 2)
+            .jpeg({ quality: 90 })
+            .toFile(tempImgPath);
+    }
 }
 
 fs.readdirSync(previewDir).forEach(async (file) => {
     const ext = file.split('.').pop().toLowerCase();
     if (cover.imgFormat.has(ext)) {
         const imgPath = path.join(previewDir, file);
-        const tempImgPath = path.join(previewDir, `${file}_temp`);
 
-        reduceImgSize(imgPath, tempImgPath);
+        const size = fs.statSync(imgPath).size;
+        // 将字节转换为 MB
+        const fileSizeInMB = size / (1024 * 1024);
+        if (fileSizeInMB > 3) {
+            const tempImgPath = path.join(previewDir, `${file}_temp`);
+            reduceImgSize(imgPath, tempImgPath, fileSizeInMB)
+                .then(() => {
+                    // 处理完后，将临时文件重命名为原始文件
+                    fs.rename(tempImgPath, imgPath, (err) => {
+                        if (err) {
+                            console.error('重命名失败:', err);
+                        } else {
+                            console.log('压缩图片成功，文件已被覆盖:', imgPath);
+                        }
+                    });
+                })
+                .catch((err) => {
+                    console.error('发生错误:', err);
+                });
+        }
     }
 });