From 4ae776dd921e08a7efd0091c7b5296c399b1e080 Mon Sep 17 00:00:00 2001
From: Dona Maria Absi <49731027+DonaAbsi@users.noreply.github.com>
Date: Thu, 27 Mar 2025 10:21:55 +0300
Subject: [PATCH] logs for when presence was detected

---
 .../fact_presence_state_timestamp.sql         | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 fact_presence_state_timestamp/fact_presence_state_timestamp.sql

diff --git a/fact_presence_state_timestamp/fact_presence_state_timestamp.sql b/fact_presence_state_timestamp/fact_presence_state_timestamp.sql
new file mode 100644
index 0000000..5cf3710
--- /dev/null
+++ b/fact_presence_state_timestamp/fact_presence_state_timestamp.sql
@@ -0,0 +1,44 @@
+/*
+ * This model tracks the timestamp when a presence state went from no-presence --> presence detected, per device.
+ * This model should be used to display the presence logs Talal requested on the platform
+ */
+
+WITH device_logs AS (
+    SELECT 
+        device.uuid AS device_id,
+        device.created_at,
+        device.device_tuya_uuid,
+        device.space_device_uuid AS space_id,
+        "device-status-log".event_id,
+        "device-status-log".event_time::timestamp,
+        "device-status-log".code,
+        "device-status-log".value,
+        "device-status-log".log,
+        LAG("device-status-log".event_time::timestamp) 
+            OVER (PARTITION BY device.uuid 
+                  ORDER BY "device-status-log".event_time) AS prev_timestamp,
+        LAG("device-status-log".value) 
+            OVER (PARTITION BY device.uuid 
+                  ORDER BY "device-status-log".event_time) AS prev_value
+    FROM device
+    LEFT JOIN "device-status-log"
+        ON device.uuid = "device-status-log".device_id
+    LEFT JOIN product
+        ON product.uuid = device.product_device_uuid
+    WHERE product.cat_name = 'hps' -- presence sensors
+      AND "device-status-log".code = 'presence_state'
+    ORDER BY device.uuid, "device-status-log".event_time
+)
+
+, presence_detection AS (
+    SELECT *, 
+        CASE 
+            WHEN value IN ('presence', 'motion') AND prev_value = 'none' THEN 1  -- detects a change in status from no presence to presence or motion
+            ELSE 0 
+        END AS presence_detected
+    FROM device_logs
+)
+
+SELECT event_time as "time_presence_detected", device_id, space_id
+FROM presence_detection
+WHERE presence_detected=1
\ No newline at end of file