feat: 站内信 (#6183)

* 添加站内信

* s

* s

* 添加接口

* fix

* fix

* 重构了一些

* 完成

* 完善

* s

* s

* s

* s

* s

* s

* 测试ok

* 替换业务中发送消息的方式

* 修改

* s

* 去掉 update 兼容 create

* 添加 unread total 接口

* 调整json字段

Co-authored-by: xinwen <coderWen@126.com>

apps/notifications/backends/base.py

@@ -0,0 +1,32 @@
+from django.conf import settings
+
+
+class BackendBase:
+    # User 表中的字段
+    account_field = None
+
+    # Django setting 中的字段名
+    is_enable_field_in_settings = None
+
+    def get_accounts(self, users):
+        accounts = []
+        unbound_users = []
+        account_user_mapper = {}
+
+        for user in users:
+            account = getattr(user, self.account_field, None)
+            if account:
+                account_user_mapper[account] = user
+                accounts.append(account)
+            else:
+                unbound_users.append(user)
+        return accounts, unbound_users, account_user_mapper
+
+    @classmethod
+    def get_account(cls, user):
+        return getattr(user, cls.account_field)
+
+    @classmethod
+    def is_enable(cls):
+        enable = getattr(settings, cls.is_enable_field_in_settings)
+        return bool(enable)