perf: 重构 ticket (#8281)

* perf: 重构 ticket

* perf: 优化 tickets

* perf: 暂存

* perf: 建立 ticket model

* perf: 暂存一下

* perf: 修改 tickets

* perf: 修改 import

* perf: 修改model

* perf: 暂存一波

* perf: 修改...

* del process_map field

* 工单重构

* 资产 应用对接前端

* perf: 修改 ticket

* fix: bug

* 修改迁移文件

* 添加其他api

* 去掉process_map

* perf: 优化去掉 signal

* perf: 修改这里

* 修改一点

* perf: 修改工单

* perf: 修改状态

* perf: 修改工单流转

* step 状态切换

* perf: 修改 ticket open

* perf: 修改流程

* perf: stash it

* 改又改

* stash it

* perf: stash

* stash

* migrate

* perf migrate

* 调整一下

* 修复bug

* 修改一点

* 修改一点

* 优化一波

* perf: ticket migrations

Co-authored-by: ibuler <ibuler@qq.com>
Co-authored-by: feng626 <1304903146@qq.com>

apps/tickets/handlers/base.py

@@ -0,0 +1,81 @@
+from django.utils.translation import ugettext as _
+
+from common.utils import get_logger
+from tickets.utils import (
+    send_ticket_processed_mail_to_applicant,
+    send_ticket_applied_mail_to_assignees
+)
+from tickets.const import TicketState, TicketStatus
+
+logger = get_logger(__name__)
+
+
+class BaseHandler:
+
+    def __init__(self, ticket):
+        self.ticket = ticket
+
+    def on_change_state(self, state):
+        self._create_state_change_comment(state)
+        handler = getattr(self, f'_on_{state}', lambda: None)
+        return handler()
+
+    def _on_pending(self):
+        self._send_applied_mail_to_assignees()
+
+    def on_step_state_change(self, step, state):
+        self._create_state_change_comment(state)
+        handler = getattr(self, f'_on_step_{state}', lambda: None)
+        return handler(step)
+
+    def _on_step_approved(self, step):
+        next_step = step.next()
+        is_finished = not next_step
+        if is_finished:
+            self._send_processed_mail_to_applicant(step)
+        else:
+            self._send_processed_mail_to_applicant(step)
+            self._send_applied_mail_to_assignees(next_step)
+        return is_finished
+
+    def _on_step_rejected(self, step):
+        self._send_processed_mail_to_applicant(step)
+
+    def _on_step_closed(self, step):
+        self._send_processed_mail_to_applicant()
+
+    def _send_applied_mail_to_assignees(self, step=None):
+        if step:
+            assignees = [step.assignee for step in step.ticket_assignees.all()]
+        else:
+            assignees = self.ticket.current_assignees
+        assignees_display = ', '.join([str(assignee) for assignee in assignees])
+        logger.debug('Send applied email to assignees: {}'.format(assignees_display))
+        send_ticket_applied_mail_to_assignees(self.ticket, assignees)
+
+    def _send_processed_mail_to_applicant(self, step=None):
+        applicant = self.ticket.applicant
+        if self.ticket.status == TicketStatus.closed:
+            processor = applicant
+        else:
+            processor = step.processor if step else self.ticket.processor
+        logger.debug('Send processed mail to applicant: {}'.format(applicant))
+        send_ticket_processed_mail_to_applicant(self.ticket, processor)
+
+    def _create_state_change_comment(self, state):
+        # 打开或关闭工单，备注显示是自己，其他是受理人
+        if state in [TicketState.reopen, TicketState.pending, TicketState.closed]:
+            user = self.ticket.applicant
+        else:
+            user = self.ticket.processor
+
+        user_display = str(user)
+        state_display = getattr(TicketState, state).label
+        data = {
+            'body': _('{} {} the ticket').format(user_display, state_display),
+            'user': user,
+            'user_display': str(user),
+            'type': 'state',
+            'state': state
+        }
+        return self.ticket.comments.create(**data)