feat: notification sending for printing order created

printing/apps.py

@@ -12,8 +12,9 @@ class PrintingConfig(AppConfig):
     def ready(self):
         """注册信号处理函数"""
         from stateflow.signals import process_completed, state_advanced
-        from .models import PrintingJob
+        from .models import PrintingJob, PrintingOrder
         from . import handlers
+        from .signals import printing_order_created
         
         # 监听 PrintingJob 流程完成信号
         process_completed.connect(
@@ -26,6 +27,13 @@ class PrintingConfig(AppConfig):
             handlers.on_printing_job_state_advanced,
             sender=PrintingJob
         )
+
+        # 监听 PrintingOrder 创建事件（领域 signal）
+        printing_order_created.connect(
+            handlers.on_printing_order_created,
+            sender=PrintingOrder,
+            dispatch_uid="printing.on_printing_order_created",
+        )
         
         logger.info(
             f'[printing.apps] 已注册 process_completed 信号处理器, '
@@ -34,4 +42,8 @@ class PrintingConfig(AppConfig):
         logger.info(
             f'[printing.apps] 已注册 state_advanced 信号处理器, '
             f'sender={PrintingJob}, handler={handlers.on_printing_job_state_advanced}'
+        )
+        logger.info(
+            f'[printing.apps] 已注册 printing_order_created 信号处理器, '
+            f'sender={PrintingOrder}, handler={handlers.on_printing_order_created}'
         )

printing/handlers.py

@@ -242,3 +242,88 @@ def on_printing_job_state_advanced(sender, **kwargs):
 
     # 在事务提交后再发送，避免事务回滚但通知已发出
     transaction.on_commit(_send_wecom)
+
+
+def on_printing_order_created(sender, **kwargs):
+    """
+    PrintingOrder 创建时的处理（领域 signal：printing.signals.printing_order_created）。
+
+    需求：
+    - 在事务提交后发送企业微信机器人通知（markdown）
+    - 消息字段（中文）：
+      - 印染订单ID / human_id
+      - 创建时间
+      - 发送者（优先 created_by.employee.name / created_by.username）
+      - 客户、面料、出货日期（可选字段，缺省展示为 '-'）
+    """
+    # 测试环境默认关闭，避免单测出网/刷屏
+    if not getattr(settings, "PRINTING_ORDER_CREATED_WECOM_NOTIFY_ENABLED", True):
+        return
+    if getattr(settings, "TESTING", False):
+        return
+
+    order = kwargs.get("instance")
+    created_by = kwargs.get("created_by")
+    if order is None:
+        logger.warning("[printing.handlers] printing_order_created 信号缺少 instance，跳过通知")
+        return
+
+    try:
+        from printing.services import render_printing_order_created_markdown
+
+        created_at_dt = getattr(order, "created_at", None)
+        created_at = (
+            timezone.localtime(created_at_dt).strftime("%Y-%m-%d %H:%M:%S")
+            if created_at_dt is not None
+            else timezone.localtime(timezone.now()).strftime("%Y-%m-%d %H:%M:%S")
+        )
+
+        emp = getattr(created_by, "employee", None) if created_by else None
+        sender_label = getattr(emp, "name", None) if emp is not None else None
+        sender_label = sender_label or getattr(created_by, "username", None) if created_by else None
+        sender_label = sender_label or "系统自动发送"
+
+        customer_name = None
+        try:
+            customer = getattr(order, "customer", None)
+            customer_name = getattr(customer, "name", None) if customer else None
+        except Exception:
+            customer_name = None
+
+        outgoing_dt = getattr(order, "outgoing_date", None)
+        outgoing_date = (
+            timezone.localtime(outgoing_dt).strftime("%Y-%m-%d %H:%M:%S")
+            if outgoing_dt is not None
+            else "-"
+        )
+
+        message = render_printing_order_created_markdown(
+            printing_order_id=str(getattr(order, "id", "-") or "-"),
+            printing_order_human_id=str(getattr(order, "human_id", "-") or "-"),
+            created_at=str(created_at),
+            sender_label=str(sender_label),
+            customer_name=str(customer_name or "-"),
+            fabric=str(getattr(order, "fabric", "-") or "-"),
+            outgoing_date=str(outgoing_date),
+        )
+    except Exception:
+        logger.exception("[printing.handlers] 渲染企业微信消息失败，跳过通知")
+        return
+
+    def _send_wecom():
+        try:
+            from api_v1.utils.wecom_webhook import send_wecom_webhook_message
+
+            resp = send_wecom_webhook_message(content=message, msgtype="markdown")
+            if not resp.ok:
+                logger.warning(
+                    "[printing.handlers] WeCom webhook 返回失败：errcode=%s, errmsg=%s, raw=%s",
+                    resp.errcode,
+                    resp.errmsg,
+                    resp.raw,
+                )
+        except Exception:
+            logger.exception("[printing.handlers] 发送 WeCom webhook 失败（已忽略，不影响主流程）")
+
+    # 在事务提交后再发送，避免事务回滚但通知已发出
+    transaction.on_commit(_send_wecom)

printing/services.py

@@ -254,3 +254,39 @@ def send_printing_job_latest_state_wecom(
         "errcode": resp.errcode,
         "errmsg": resp.errmsg,
     }
+
+
+def render_printing_order_created_markdown(
+    *,
+    printing_order_id: str,
+    printing_order_human_id: str,
+    created_at: str,
+    sender_label: str,
+    customer_name: str,
+    fabric: str,
+    outgoing_date: str,
+) -> str:
+    template = getattr(
+        settings,
+        "PRINTING_ORDER_CREATED_WECOM_MARKDOWN_TEMPLATE",
+        (
+            "### 印染订单创建\n"
+            "\n"
+            "- **印染订单ID**：`{printing_order_id}`\n"
+            "- **订单编号**：`{printing_order_human_id}`\n"
+            "- **创建时间**：`{created_at}`\n"
+            "- **发送者**：{sender}\n"
+            "- **客户**：{customer_name}\n"
+            "- **面料**：{fabric}\n"
+            "- **出货日期**：`{outgoing_date}`\n"
+        ),
+    )
+    return template.format(
+        printing_order_id=str(printing_order_id),
+        printing_order_human_id=str(printing_order_human_id),
+        created_at=str(created_at),
+        sender=str(sender_label or "系统自动发送"),
+        customer_name=str(customer_name or "-"),
+        fabric=str(fabric or "-"),
+        outgoing_date=str(outgoing_date or "-"),
+    )

printing/signals.py

@@ -0,0 +1,17 @@
+"""
+Printing domain signals.
+
+We use domain-level signals (instead of model post_save) to:
+- keep semantics clean (only fire on business "create" flow)
+- allow passing explicit actor (created_by / sender_label)
+- keep integration (e.g. WeCom notify) in handlers
+"""
+
+from django.dispatch import Signal
+
+# Fired when a PrintingOrder is created via business service.
+# Payload:
+# - instance: PrintingOrder
+# - created_by: Django User (may be None)
+printing_order_created = Signal()
+