聊天上传图片压缩，新增返回原图接口

app/common/controller/Upload.php

@@ -6,8 +6,7 @@
 namespace app\common\controller;
 
 use app\BaseController;
-use app\enterprise\model\{File as FileModel,Message,User,Emoji}; 
-use app\manage\model\{Config}; 
+use app\enterprise\model\{File as FileModel,Message,User,Emoji};
 use think\facade\Filesystem;
 use think\facade\Request;
 use think\File;
@@ -98,6 +97,11 @@ class Upload extends BaseController
         }
         // 把左边的/去掉再加上，避免有些有/有些没有
         $object='/'.ltrim($object,'/');
+        // 压缩图片
+        $compress_img = $file['compress_img'] ?? '';
+        if ($filecate == 'image' && empty($compress_img)) {
+            $compress_img = $this->getCompressImg($object, $info['ext'], $prefix);
+        }
         $ret = [
             "src"      => $object,
             "name"     => $name,
@@ -108,6 +112,7 @@ class Upload extends BaseController
             "ext"     => $info['ext'],
             "type"     =>2,
             'user_id'=>$uid,
+            'compress_img'=>$compress_img,
             'videoInfo'=>$imageInfo
         ];
         
@@ -140,7 +145,7 @@ class Upload extends BaseController
             if($message['type']!='voice'){
                 $newFile->save($ret);
             }
-            $message['content']=$ret['src'];
+            $message['content']=$ret['compress_img'] ?: $ret['src'];
             $message['file_id']=$newFile->file_id ?? 0;
             $message['file_cate']=$fileType;
             $message['file_size']=$info['size'];
@@ -403,4 +408,82 @@ class Upload extends BaseController
         return $info;
     }
 
+    // 压缩图片地址
+    protected function getCompressImg($src, $ext, $prefix)
+    {
+        $newName2   = uniqid() . '.' . $ext;
+        $compress_path = $prefix . $newName2;
+        if($this->disk=='local'){
+            $compress_path='/storage/'.$compress_path;
+        }
+        // 原图地址
+        $filePath = root_path().'public' . $src;
+        // 压缩图地址
+        $target = root_path().'public/' .ltrim($compress_path,'/');
+        // 压缩并处理图片大小
+        $compress_res = $this->compressTo5x5($filePath, $target);
+        if (!$compress_res) {
+            return '';
+        }
+        return $compress_path;
+    }
+
+    /**
+     * 使用Imagick压缩到5x5像素
+     * @param $source
+     * @param $target
+     * @return bool
+     */
+    protected function compressTo5x5($source, $target)
+    {
+        // 获取图片信息
+        list($width, $height, $type) = getimagesize($source);
+
+        // 根据类型创建图像资源
+        switch ($type) {
+            case IMAGETYPE_JPEG:
+                $image = imagecreatefromjpeg($source);
+            break;
+            case IMAGETYPE_PNG:
+                $image = imagecreatefrompng($source);
+            break;
+            case IMAGETYPE_GIF:
+                $image = imagecreatefromgif($source);
+            break;
+            default:
+                return false;
+        }
+
+        // 创建5x5目标图像
+        $thumb = imagecreatetruecolor($width, $height);
+
+        // 处理透明背景
+        if ($type == IMAGETYPE_PNG || $type == IMAGETYPE_GIF) {
+            imagecolortransparent($thumb, imagecolorallocatealpha($thumb, 0, 0, 0, 127));
+            imagealphablending($thumb, false);
+            imagesavealpha($thumb, true);
+        }
+
+        // 缩放并复制图像
+        imagecopyresampled($thumb, $image, 0, 0, 0, 0, $width, $height, $width, $height);
+
+        // 保存压缩后的图片
+        switch ($type) {
+            case IMAGETYPE_JPEG:
+                imagejpeg($thumb, $target, 40);
+            break;
+            case IMAGETYPE_PNG:
+                imagepng($thumb, $target, 40);
+            break;
+            case IMAGETYPE_GIF:
+                imagegif($thumb, $target);
+            break;
+        }
+
+        // 释放内存
+        imagedestroy($image);
+        imagedestroy($thumb);
+
+        return true;
+    }
 }

app/enterprise/controller/Files.php

@@ -89,4 +89,32 @@ class Files extends BaseController
         }
         return success('', $data, $list->total(), $list->currentPage());
     }
+
+    // 获取原图
+    public function viewOriginalImage()
+    {
+        $file_id = $this->request->param('file_id');
+        $msg_id = $this->request->param('msg_id');
+        if (empty($file_id) || empty($msg_id)) {
+            return error(lang('system.error'));
+        }
+        if (!is_numeric($file_id) || !is_numeric($msg_id)) {
+            return error(lang('system.error'));
+        }
+        $where = [
+            'file_id' => $file_id,
+            'msg_id' => $msg_id
+        ];
+        $res = Message::where($where)->field('file_id')->find();
+        if (!$res) {
+            return error(lang('system.error'));
+        }
+
+        $res = File::where('file_id', $file_id)->field('src')->find();
+        if (!$res) {
+            return error(lang('system.error'));
+        }
+
+        return success('', ['src' => $res['src']]);
+    }
 }