@@ -0,0 +1,60 @@
+<?php
+
+namespace app\ticket\logic;
+
+use app\ticket\model\Conversation;
+use support\Log;
+use support\exception\BusinessException;
+
+class ConversationLogic
+{
+    public function list($params)
+    {
+        $where = [];
+        if (!empty($params['ticket_id'])) {
+            $where['ticket_id'] = $params['ticket_id'];
+        }
+        $size = $params['size'] ?? 10;
+        $current = $params['current'] ?? 1;
+        return Conversation::where($where)->paginate($size, ['*'], 'page', $current);
+    }
+
+    public function add(array $data)
+    {
+        try {
+            return Conversation::create($data);
+        } catch (\Throwable $e) {
+            Log::error('会话创建失败', [
+                'data' => $data,
+                'error' => $e->getMessage()
+            ]);
+            throw new BusinessException('会话创建失败，请稍后重试', 500);
+        }
+    }
+    public function edit(array $data)
+    {
+        try {
+            $conversation = Conversation::updateOrCreate(['id' => $data['id']], $data);
+            return $conversation;
+        } catch (\Throwable $e) {
+            Log::error('会话编辑失败', [
+                'data' => $data,
+                'error' => $e->getMessage()
+            ]);
+            throw new BusinessException('会话编辑失败，请稍后重试', 500);
+        }
+    }
+
+    /**
+     * 获取工单最新一条记录
+     * @param array $data
+     * @return Conversation|\Illuminate\Database\Eloquent\Model|object|null
+     */
+    public function firstByTicket(int $ticketId)
+    {
+        $conversation = Conversation::where('ticket_id',$ticketId)
+            ->orderBy('id','desc')
+            ->first();
+        return $conversation;
+    }
+}