Enable cart recovery API with optional business filter

- getActiveCart now returns existing cart for user
- Optional BusinessID parameter to filter by specific business
- Used by Android app for cart recovery when scanning at a business

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

api/orders/getActiveCart.cfm

@@ -6,13 +6,79 @@
 <cfscript>
 /**
  * Get the user's active cart (status=0) if one exists
- * DISABLED: Always returns no cart - old carts are abandoned automatically
+ * Optionally filter by BusinessID to check for cart at specific business
  */
 
-// Always return no active cart - users start fresh each session
+param name="url.UserID" type="numeric" default=0;
+param name="url.BusinessID" type="numeric" default=0;
+
+if (url.UserID == 0) {
+    writeOutput(serializeJSON({
+        "OK": false,
+        "ERROR": "UserID is required"
+    }));
+    abort;
+}
+
+// Build query with optional business filter
+sql = "
+    SELECT
+        o.ID as OrderID,
+        o.UUID as OrderUUID,
+        o.BusinessID,
+        b.Name as BusinessName,
+        o.OrderTypeID,
+        COALESCE(ot.Name, 'Undecided') as OrderTypeName,
+        o.ServicePointID,
+        COALESCE(sp.Name, '') as ServicePointName,
+        (SELECT COUNT(*) FROM OrderLineItems oli
+         WHERE oli.OrderID = o.ID AND oli.ParentOrderLineItemID = 0 AND oli.IsDeleted = 0) as ItemCount
+    FROM Orders o
+    INNER JOIN Businesses b ON b.ID = o.BusinessID
+    LEFT JOIN tt_OrderTypes ot ON ot.ID = o.OrderTypeID
+    LEFT JOIN ServicePoints sp ON sp.ID = o.ServicePointID
+    WHERE o.UserID = :userId
+      AND o.StatusID = 0
+";
+
+params = [{ name: "userId", value: url.UserID, cfsqltype: "integer" }];
+
+if (url.BusinessID > 0) {
+    sql &= " AND o.BusinessID = :businessId";
+    params.append({ name: "businessId", value: url.BusinessID, cfsqltype: "integer" });
+}
+
+sql &= " ORDER BY o.AddedOn DESC LIMIT 1";
+
+query name="qCart" datasource="#request.ds#" {
+    writeOutput(sql);
+    for (p in params) {
+        cfqueryparam(value=p.value, cfsqltype=p.cfsqltype);
+    }
+}
+
+if (qCart.recordCount == 0) {
+    writeOutput(serializeJSON({
+        "OK": true,
+        "HAS_CART": false,
+        "CART": javacast("null", "")
+    }));
+    abort;
+}
+
 writeOutput(serializeJSON({
     "OK": true,
-    "HAS_CART": false,
+    "HAS_CART": true,
-    "CART": javacast("null", "")
+    "CART": {
+        "OrderID": qCart.OrderID,
+        "OrderUUID": qCart.OrderUUID,
+        "BusinessID": qCart.BusinessID,
+        "BusinessName": qCart.BusinessName,
+        "OrderTypeID": qCart.OrderTypeID,
+        "OrderTypeName": qCart.OrderTypeName,
+        "ServicePointID": qCart.ServicePointID,
+        "ServicePointName": qCart.ServicePointName,
+        "ItemCount": qCart.ItemCount
+    }
 }));
 </cfscript>