set order_number if order state changes to completed

src/api/order/content-types/order/lifecycles.ts

@@ -94,16 +94,35 @@ export default {
     const { id: entityId } = where;
     const { time_start, time_end, state } = data;
 
-    if (state && !time_start && !time_end) {
-      return;
-    }
-
     const existingOrder = await strapi.db.query('api::order.order').findOne({
       where: { id: entityId },
       select: ['documentId', 'time_start', 'time_end'],
-      populate: ['slot'],
+      populate: ['slot', 'client'],
     });
 
+    if (state && !time_start && !time_end) {
+      if (state === 'completed') {
+        const clientId = extractId(existingOrder.client);
+
+        const lastOrder = await strapi.db.query('api::order.order').findMany({
+          where: {
+            client: {
+              id: clientId,
+            },
+            state: 'completed',
+          },
+          orderBy: { order_number: 'desc' },
+          limit: 1,
+        });
+
+        const lastOrderNumber =
+          lastOrder.length > 0 ? lastOrder[0].order_number : 0;
+        data.order_number = lastOrderNumber + 1;
+      }
+
+      return;
+    }
+
     if (
       existingOrder.time_start === time_start &&
       existingOrder.time_end === time_end