undoc_api: allow for null topic as well

We really can't do much with an entry that is null'd out like this,
but we should at least allow parsing that data without error.

refs: #352

Author: wez

src/__k9_snapshots__/undoc_api/undoc_api_test_get_one_click.snap

@@ -59,7 +59,9 @@ OneClickResponse {
                                     sku: Some(
                                         "H6072",
                                     ),
-                                    topic: REDACTED,
+                                    topic: Some(
+                                        REDACTED,
+                                    ),
                                     ble_address: Some(
                                         "",
                                     ),

src/__k9_snapshots__/undoc_api/undoc_api_test_issue36.snap

@@ -59,7 +59,9 @@ OneClickResponse {
                                     sku: Some(
                                         "H6199",
                                     ),
-                                    topic: REDACTED,
+                                    topic: Some(
+                                        REDACTED,
+                                    ),
                                     ble_address: Some(
                                         "XX:XX:XX",
                                     ),
@@ -165,7 +167,9 @@ OneClickResponse {
                                     sku: Some(
                                         "H6199",
                                     ),
-                                    topic: REDACTED,
+                                    topic: Some(
+                                        REDACTED,
+                                    ),
                                     ble_address: Some(
                                         "XX:XX:XX",
                                     ),

src/undoc_api.rs

@@ -464,11 +464,10 @@ impl GoveeUndocumentedApi {
 
                 let mut entries = vec![];
                 for rule in oc.iot_rules {
-                    let msgs = rule.rule.into_iter().map(|r| r.iot_msg).collect();
-                    entries.push(ParsedOneClickEntry {
-                        topic: rule.device_obj.topic,
-                        msgs,
-                    });
+                    if let Some(topic) = rule.device_obj.topic {
+                        let msgs = rule.rule.into_iter().map(|r| r.iot_msg).collect();
+                        entries.push(ParsedOneClickEntry { topic, msgs });
+                    }
                 }
 
                 result.push(ParsedOneClick { name, entries });
@@ -673,7 +672,7 @@ pub struct OneClickIotRuleDevice {
     pub device: Option<String>,
     pub sku: Option<String>,
 
-    pub topic: Redacted<String>,
+    pub topic: Option<Redacted<String>>,
 
     pub ble_address: Option<String>,
     pub ble_name: Option<String>,