regroup backend and frontend in app folder

app/backend/sql/retrieve_node_list.sql

@@ -0,0 +1,137 @@
+WITH base_data AS (
+    SELECT 
+        service_id,
+        status,
+        timestamp,
+        date_trunc('hour', timestamp) as hr_ts,
+        date_trunc('day', timestamp) as day_ts
+    FROM status_records
+    WHERE timestamp >= NOW() - INTERVAL '60 days'
+),
+time_slots_minutes AS (
+    SELECT generate_series(
+        date_trunc('minute', now()) - interval '59 minutes',
+        date_trunc('minute', now()),
+        interval '1 minute'
+    ) as slot
+),
+filled_minute_data AS (
+    SELECT 
+        s.id as service_id,
+        ts.slot as timestamp,
+        COALESCE(MAX(bd.status), 3) as status 
+    FROM time_slots_minutes ts
+    CROSS JOIN services s
+    LEFT JOIN base_data bd ON 
+        date_trunc('minute', bd.timestamp) = ts.slot 
+        AND bd.service_id = s.id
+    GROUP BY s.id, ts.slot
+),
+minute_agg AS (
+    SELECT 
+        service_id, 
+        json_agg(
+            json_build_object('timestamp', timestamp, 'status', status) 
+            ORDER BY timestamp DESC
+        ) as data
+    FROM filled_minute_data
+    GROUP BY service_id
+),
+time_slots_hours AS (
+    SELECT generate_series(
+        date_trunc('hour', now()) - interval '23 hours',
+        date_trunc('hour', now()),
+        interval '1 hour'
+    ) as slot
+),
+filled_hours_data AS (
+    SELECT 
+        s.id as service_id,
+        ts.slot as timestamp,
+        COALESCE(AVG(CASE WHEN bd.status = 1 THEN 1.0 WHEN bd.status = 3 THEN NULL ELSE 0.0 END), 3) as ratio
+    FROM time_slots_hours ts
+    CROSS JOIN services s
+    LEFT JOIN base_data bd ON 
+        date_trunc('hour', bd.timestamp) = ts.slot 
+        AND bd.service_id = s.id
+    GROUP BY s.id, ts.slot
+),
+hour_agg AS (
+    SELECT 
+        service_id, 
+        json_agg(
+            json_build_object(
+                'timestamp', timestamp, 
+                'status', CASE 
+                    WHEN ratio = 3 THEN 3
+                    WHEN ratio >= 0.95 THEN 1       
+                    WHEN ratio >= 0.5 THEN 2       
+                    ELSE 0                         
+                END
+            ) ORDER BY timestamp DESC
+        ) as data
+    FROM filled_hours_data
+    GROUP BY service_id
+),
+time_slots_days AS (
+    SELECT generate_series(
+        date_trunc('day', now()) - interval '59 days',
+        date_trunc('day', now()),
+        interval '1 day'
+    ) as slot
+),
+filled_days_data AS (
+    SELECT 
+        s.id as service_id,
+        ts.slot as timestamp,
+        COALESCE(
+            AVG(CASE WHEN bd.status = 1 THEN 1.0 WHEN bd.status = 3 THEN NULL ELSE 0.0 END), 
+            3
+        ) as ratio
+    FROM time_slots_days ts
+    CROSS JOIN services s
+    LEFT JOIN base_data bd ON 
+        date_trunc('day', bd.timestamp) = ts.slot 
+        AND bd.service_id = s.id
+    GROUP BY s.id, ts.slot
+),
+day_agg AS (
+    SELECT 
+        service_id, 
+        json_agg(
+            json_build_object(
+                'timestamp', timestamp, 
+                'status', CASE 
+                    WHEN ratio = 3 THEN 3  
+                    WHEN ratio >= 0.98 THEN 1 
+                    WHEN ratio >= 0.5 THEN 2
+                    ELSE 0 
+                END
+            ) ORDER BY timestamp DESC
+        ) as data
+    FROM filled_days_data
+    GROUP BY service_id
+)
+SELECT 
+    n.id as id, n.name, n.address, n.status, n.last_seen,
+    COALESCE(
+        jsonb_agg(
+            json_build_object(
+                'id', s.id, 
+                'name', s.name, 
+                'command', s.command,
+                'history', json_build_object(
+                    'minute', COALESCE(ma.data, '[]'::json),
+                    'hour', COALESCE(ha.data, '[]'::json),
+                    'day', COALESCE(da.data, '[]'::json)
+                )
+            )
+        ) FILTER (WHERE s.id IS NOT NULL), 
+        '[]'::jsonb
+    ) as services
+FROM nodes n
+LEFT JOIN services s ON n.id = s.node_id
+LEFT JOIN minute_agg ma ON s.id = ma.service_id
+LEFT JOIN hour_agg ha ON s.id = ha.service_id
+LEFT JOIN day_agg da ON s.id = da.service_id
+GROUP BY n.id;