Major Update: created v5 (switching from x11 to wayland). Changed polybar to waybar in this commit.

home/.config/waybar/screen_time.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+LOG_FILE="$HOME/.system_stats.json"
+today=$(date +%Y-%m-%d)
+
+if [ ! -f "$LOG_FILE" ]; then
+    echo "0s"
+    exit 0
+fi
+
+total_seconds=$(jq -r ".\"$today\".screen.turned_on_s // 0" "$LOG_FILE")
+
+if [ "$total_seconds" -eq 0 ]; then
+    echo "0s"
+    exit 0
+fi
+
+h=$(( total_seconds / 3600 ))
+m=$(( (total_seconds % 3600) / 60 ))
+s=$(( total_seconds % 60 ))
+
+output=""
+[ "$h" -gt 0 ] && output="${h}h "
+[ "$m" -ge 0 ] && output="${output}${m}m "
+# [ "$s" -gt 0 ] || [ -z "$output" ] && output="${output}${s}s"
+
+echo "$output" | sed 's/ $//'