perf: 重构工单处理流程 (#5408)

* perf: 重构工单处理流程

* perf: 重构工单处理流程 (1)

* perf: 重构工单处理流程 (2)

* perf: 重构工单处理流程 (3)

* perf: 重构工单处理流程 (4)

* perf: 重构工单处理流程 (5)

* perf: 重构工单处理流程 (6)

Co-authored-by: Bai <bugatti_it@163.com>

apps/tickets/handler/base.py

@@ -0,0 +1,122 @@
+from django.utils.translation import ugettext as __
+from common.utils import get_logger
+from tickets.utils import send_ticket_processed_mail_to_applicant
+
+
+logger = get_logger(__name__)
+
+
+class BaseHandler(object):
+
+    def __init__(self, ticket):
+        self.ticket = ticket
+
+    # on action
+    def _on_open(self):
+        self.ticket.applicant_display = str(self.ticket.applicant)
+        meta_display = getattr(self, '_construct_meta_display_of_open', lambda: {})()
+        self.ticket.meta.update(meta_display)
+        self.ticket.save()
+
+    def _on_approve(self):
+        meta_display = getattr(self, '_construct_meta_display_of_approve', lambda: {})()
+        self.ticket.meta.update(meta_display)
+        self.__on_process()
+
+    def _on_reject(self):
+        self.__on_process()
+
+    def _on_close(self):
+        self.__on_process()
+
+    def __on_process(self):
+        self.ticket.processor_display = str(self.ticket.processor)
+        self.ticket.set_status_closed()
+        self._send_processed_mail_to_applicant()
+        self.ticket.save()
+
+    def dispatch(self, action):
+        self._create_comment_on_action()
+        method = getattr(self, f'_on_{action}', lambda: None)
+        return method()
+
+    # email
+    def _send_processed_mail_to_applicant(self):
+        msg = 'Ticket ({}) has processed, send mail to applicant ({})'.format(
+            self.ticket.title, self.ticket.applicant_display
+        )
+        logger.debug(msg)
+        send_ticket_processed_mail_to_applicant(self.ticket)
+
+    # comments
+    def _create_comment_on_action(self):
+        user = self.ticket.applicant if self.ticket.action_open else self.ticket.processor
+        user_display = str(user)
+        action_display = self.ticket.get_action_display()
+        data = {
+            'body': __('User {} {} the ticket'.format(user_display, action_display)),
+            'user': user,
+            'user_display': user_display
+        }
+        return self.ticket.comments.create(**data)
+
+    # body
+    def get_body(self):
+        old_body = self.ticket.meta.get('body')
+        if old_body:
+            # 之前版本的body
+            return old_body
+        basic_body = self._construct_basic_body()
+        meta_body = self._construct_meta_body()
+        return basic_body + meta_body
+
+    def _construct_basic_body(self):
+        body = '''
+            {}:
+            {}: {},
+            {}: {},
+            {}: {},
+            {}: {},
+            {}: {},
+            {}: {},
+            {}: {}
+        '''.format(
+            __("Ticket basic info"),
+            __('Ticket title'), self.ticket.title,
+            __('Ticket type'), self.ticket.get_type_display(),
+            __('Ticket applicant'), self.ticket.applicant_display,
+            __('Ticket assignees'), self.ticket.assignees_display,
+            __('Ticket processor'), self.ticket.processor_display,
+            __('Ticket action'), self.ticket.get_action_display(),
+            __('Ticket status'), self.ticket.get_status_display()
+        )
+        return body
+
+    def _construct_meta_body(self):
+        body = ''
+        open_body = self._base_construct_meta_body_of_open()
+        body += open_body
+        if self.ticket.action_approve:
+            approve_body = self._base_construct_meta_body_of_approve()
+            body += approve_body
+        return body
+
+    def _base_construct_meta_body_of_open(self):
+        open_body = '''
+            {}:
+            {}
+        '''.format(
+            __('Ticket applied info'),
+            getattr(self, '_construct_meta_body_of_open', lambda: 'No')()
+        )
+        return open_body
+
+    def _base_construct_meta_body_of_approve(self):
+        approve_body = '''
+            {}:
+            {}
+        '''.format(
+            __('Ticket approved info'),
+            getattr(self, '_construct_meta_body_of_approve', lambda: 'No')()
+        )
+        return approve_body