docs(examples): update sync function examples for JSON return values

Author: andinux

examples/simple-todo-db/README.md

@@ -168,7 +168,7 @@ SELECT cloudsync_network_set_apikey('your-api-key-here');
 
 -- Pull data from Device A - repeat until data is received
 SELECT cloudsync_network_sync();
--- Keep calling until the function returns > 0 (indicating data was received)
+-- Check the "rowsReceived" field in the JSON result to see if data was received
 SELECT cloudsync_network_sync();
 
 -- Verify data was synced
@@ -199,7 +199,7 @@ SELECT cloudsync_network_sync();
 ```sql
 -- Get updates from Device B - repeat until data is received
 SELECT cloudsync_network_sync();
--- Keep calling until the function returns > 0 (indicating data was received)
+-- Check the "rowsReceived" field in the JSON result to see if data was received
 SELECT cloudsync_network_sync();
 
 -- View all tasks (should now include Device B's additions)
@@ -232,7 +232,7 @@ SELECT cloudsync_network_has_unsent_changes();
 -- When network returns, sync automatically resolves conflicts
 -- Repeat until all changes are synchronized
 SELECT cloudsync_network_sync();
--- Keep calling until the function returns > 0 (indicating data was received/sent)
+-- Check the "rowsReceived" field in the JSON result to see if data was received/sent
 SELECT cloudsync_network_sync();
 ```
 

examples/to-do-app/components/SyncContext.js

@@ -58,10 +58,14 @@ export const SyncProvider = ({ children }) => {
 
           const result = await Promise.race([queryPromise, timeoutPromise]);
 
-          if (result.rows && result.rows.length > 0 && result.rows[0]['cloudsync_network_check_changes()'] > 0) {
-            console.log(`${result.rows[0]['cloudsync_network_check_changes()']} changes detected, triggering refresh`);
-            // Defer refresh to next tick to avoid blocking current interaction
-            setTimeout(() => triggerRefresh(), 0);
+          const raw = result.rows?.[0]?.['cloudsync_network_check_changes()'];
+          if (raw) {
+            const { rowsReceived } = JSON.parse(raw);
+            if (rowsReceived > 0) {
+              console.log(`${rowsReceived} changes detected, triggering refresh`);
+              // Defer refresh to next tick to avoid blocking current interaction
+              setTimeout(() => triggerRefresh(), 0);
+            }
           }
         } catch (error) {
           console.error('Error checking for changes:', error);