feat: Implement simple filters management in FilterManager with API integration for fetching, adding, and deleting filters, enhancing user experience and functionality

backend/server.js

@@ -785,6 +785,74 @@ app.post('/api/server-filters/:serverId', async (req, res) => {
     }
 });
 
+// --- Simple Filters Routes ---
+
+// Get simple filters
+app.get('/api/simple-filters', async (req, res) => {
+    const params = {
+        Bucket: BUCKET_NAME,
+        Key: 'simple-filters.json',
+    };
+
+    try {
+        const data = await s3.getObject(params).promise();
+        const fileContent = data.Body.toString('utf-8');
+        let filters = [];
+        
+        try {
+            filters = JSON.parse(fileContent);
+            if (!Array.isArray(filters)) {
+                filters = [];
+            }
+        } catch (parseError) {
+            console.error('Error parsing simple filters:', parseError);
+            filters = [];
+        }
+        
+        res.json(filters);
+    } catch (error) {
+        if (error.code === 'NoSuchKey') {
+            res.json([]); // Return empty array if file does not exist
+        } else {
+            console.error(error);
+            res.status(500).send('Error reading simple filters from S3');
+        }
+    }
+});
+
+// Update simple filters
+app.post('/api/simple-filters', async (req, res) => {
+    const { filters } = req.body;
+    
+    // Validate filters structure
+    if (!Array.isArray(filters)) {
+        return res.status(400).send('Filters must be an array');
+    }
+    
+    // Validate each filter has required fields
+    for (let i = 0; i < filters.length; i++) {
+        const filter = filters[i];
+        if (!filter.community || !filter.gateway) {
+            return res.status(400).send(`Filter at index ${i} is missing required fields`);
+        }
+    }
+
+    const params = {
+        Bucket: BUCKET_NAME,
+        Key: 'simple-filters.json',
+        Body: JSON.stringify(filters, null, 2), // Pretty print JSON
+        ContentType: 'application/json',
+    };
+
+    try {
+        await s3.putObject(params).promise();
+        res.send('Simple filters updated successfully');
+    } catch (error) {
+        console.error(error);
+        res.status(500).send('Error writing simple filters to S3');
+    }
+});
+
 // The "catchall" handler: for any request that doesn't
 // match one above, send back React's index.html file.
 app.get('*', (req, res) => {