Migrate to snowfall lib

modules/home/wayland/apps/eww/scripts/brightness

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+function get_time_ms {
+  date -u +%s%3N
+}
+
+icons=("󰛩" "󱩒" "󰛨")
+
+gen_output() {
+  icon="${icons[$(awk -v n="$(brillo)" 'BEGIN{print int(n/34)}')]}"
+  prcnt=$(brillo | xargs printf "%.*f\n" "0")
+  echo '{"percent": '$prcnt', "icon": "'$icon'"}'
+}
+
+if [[ $(brillo 2>/dev/stdout 1>/dev/null | head -n1 | awk '{print $1}') == "No" ]]; then
+  echo  '{"percent":  100, "icon": "󰛨"}'
+elif [ "$1" = "" ]; then
+  # initial
+  last_time=$(get_time_ms)
+  gen_output
+
+  udevadm monitor | rg --line-buffered "backlight" | while read -r _; do
+    current_time=$(get_time_ms)
+    delta=$((current_time - last_time))
+    if [[ $delta -gt 50 ]]; then
+      gen_output
+      last_time=$(get_time_ms)
+    fi
+  done
+fi