add

app/common/model/Attachment.php

@@ -0,0 +1,115 @@
+<?php
+
+namespace app\common\model;
+
+use Throwable;
+use think\Model;
+use think\facade\Event;
+use app\admin\model\Admin;
+use app\common\library\Upload;
+use think\model\relation\BelongsTo;
+
+/**
+ * Attachment模型
+ * @property string url              文件物理路径
+ * @property int    quote            上传(引用)次数
+ * @property int    last_upload_time 最后上传时间
+ */
+class Attachment extends Model
+{
+    protected $autoWriteTimestamp = true;
+    protected $updateTime         = false;
+
+    protected $append = [
+        'suffix',
+        'full_url'
+    ];
+
+    /**
+     * 上传类实例，可以通过它调用上传文件驱动，且驱动类具有静态缓存
+     */
+    protected static Upload $upload;
+
+    protected static function init(): void
+    {
+        self::$upload = new Upload();
+    }
+
+    public function getSuffixAttr($value, $row): string
+    {
+        if ($row['name']) {
+            $suffix = strtolower(pathinfo($row['name'], PATHINFO_EXTENSION));
+            return $suffix && preg_match("/^[a-zA-Z0-9]+$/", $suffix) ? $suffix : 'file';
+        }
+        return 'file';
+    }
+
+    public function getFullUrlAttr($value, $row): string
+    {
+        $driver = self::$upload->getDriver($row['storage'], false);
+        return $driver ? $driver->url($row['url']) : full_url($row['url']);
+    }
+
+    /**
+     * 新增前
+     * @throws Throwable
+     */
+    protected static function onBeforeInsert($model): bool
+    {
+        $repeat = $model->where([
+            ['sha1', '=', $model->sha1],
+            ['topic', '=', $model->topic],
+            ['storage', '=', $model->storage],
+        ])->find();
+        if ($repeat) {
+            $driver = self::$upload->getDriver($repeat->storage, false);
+            if ($driver && !$driver->exists($repeat->url)) {
+                $repeat->delete();
+                return true;
+            } else {
+                $repeat->quote++;
+                $repeat->last_upload_time = time();
+                $repeat->save();
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * 新增后
+     */
+    protected static function onAfterInsert($model): void
+    {
+        Event::trigger('AttachmentInsert', $model);
+
+        if (!$model->last_upload_time) {
+            $model->quote            = 1;
+            $model->last_upload_time = time();
+            $model->save();
+        }
+    }
+
+    /**
+     * 删除后
+     */
+    protected static function onAfterDelete($model): void
+    {
+        Event::trigger('AttachmentDel', $model);
+
+        $driver = self::$upload->getDriver($model->storage, false);
+        if ($driver && $driver->exists($model->url)) {
+            $driver->delete($model->url);
+        }
+    }
+
+    public function admin(): BelongsTo
+    {
+        return $this->belongsTo(Admin::class);
+    }
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}