From 0f4d3f1e05d7c760835c73ee7725f5c5c5cd1cb4 Mon Sep 17 00:00:00 2001
From: ItsDrike <itsdrike@protonmail.com>
Date: Mon, 10 Jun 2024 14:32:51 +0200
Subject: [PATCH] Add brightness script

---
 .../wms/hyprland/config/keybinds.nix          |   5 +-
 .../graphical/wms/hyprland/default.nix        |   1 +
 .../packages/brightness/brightness.sh         | 166 ++++++++++++++++++
 .../hyprland/packages/brightness/default.nix  |   6 +
 .../wms/hyprland/packages/default.nix         |   1 +
 5 files changed, 178 insertions(+), 1 deletion(-)
 create mode 100644 home/programs/graphical/wms/hyprland/packages/brightness/brightness.sh
 create mode 100644 home/programs/graphical/wms/hyprland/packages/brightness/default.nix

diff --git a/home/programs/graphical/wms/hyprland/config/keybinds.nix b/home/programs/graphical/wms/hyprland/config/keybinds.nix
index 171791a..b79ff0c 100644
--- a/home/programs/graphical/wms/hyprland/config/keybinds.nix
+++ b/home/programs/graphical/wms/hyprland/config/keybinds.nix
@@ -38,7 +38,10 @@
       #
       # Brightness control
       #
-      # TODO: requires script
+      "SUPER, Right, exec, brightness -i 5% -n"
+      "SUPER, Left, exec, brightness -d 5% -n"
+      ", XF86MonBrightnessUp, exec, brightness -i 5% -n"
+      ", XF86MonBrightnessDown, exec, brightness -d 5% -n"
 
 
       #
diff --git a/home/programs/graphical/wms/hyprland/default.nix b/home/programs/graphical/wms/hyprland/default.nix
index 1cc249b..cd89d71 100644
--- a/home/programs/graphical/wms/hyprland/default.nix
+++ b/home/programs/graphical/wms/hyprland/default.nix
@@ -18,6 +18,7 @@ in {
     home.packages = with pkgs; [
       hyprland-swap-workspace
       hyprland-move-window
+      brightness
     ];
 
     wayland.windowManager.hyprland = {
diff --git a/home/programs/graphical/wms/hyprland/packages/brightness/brightness.sh b/home/programs/graphical/wms/hyprland/packages/brightness/brightness.sh
new file mode 100644
index 0000000..e5a9fa2
--- /dev/null
+++ b/home/programs/graphical/wms/hyprland/packages/brightness/brightness.sh
@@ -0,0 +1,166 @@
+#!/bin/sh
+
+# Parse arguments
+# ------------------------------------------------------------------------------------
+BRIGHTNESS_DIR="/sys/class/backlight/*"
+SEND_NOTIFICATION=0
+URGENCY="normal"
+INCREASE=0
+DECREASE=0
+SET=0
+BRIGHTNESS=0
+
+PARSED=$(getopt \
+	--options=hnu:i:d:s:p:N \
+	--longoptions=help,notification,urgency:,increase:,decrease:,set:,path:,no-notification \
+	--name "$0" \
+	-- \
+	"$@")
+
+if [ $? != 0 ]; then
+	exit 2
+fi
+
+eval set -- "$PARSED"
+
+while [ "$1" ]; do
+	case "$1" in
+	-h | --help)
+		cat <<EOF
+brightness is a cli tool that for displaying or modifying screen brightness.
+
+Options:
+-h | --help: Display this message
+-n | --notification: Produce a desktop notification with brightness info
+-N | --no-notification: Don't produce a desktop notification with brightness info
+-u | --urgency [URGENCY]: Pass over notify-send urgency attribute (default: normal)
+-i | --increase [BRIGHTNESS]: Increase the brightness by given amount
+-d | --decrease [BRIGHTNESS]: Decrease the brightness by given amount
+-s | --set [BRIGHTNESS]: Set new brightness level
+-p | --path [DIR_PATH]: Path to brightness directory (default: /sys/class/backlight/*)
+
+Valid values:
+    URGENCY: low, normal, critical
+    DIR_PATH: Valid path to a directory
+    BRIGHTNESS:
+        specific value - Example: 10
+        percentage value - Example: 10%
+EOF
+		exit 0
+		;;
+	-n | --notification)
+		SEND_NOTIFICATION=1
+		;;
+	-N | --no-notification)
+		SEND_NOTIFICATION=0
+		;;
+	-u | --urgency)
+		URGENCY="$2"
+		shift
+		;;
+	-i | --increase)
+		INCREASE=1
+		BRIGHTNESS="$2"
+		shift
+		;;
+	-d | --decrease)
+		DECREASE=1
+		BRIGHTNESS="$2"
+		shift
+		;;
+	-s | --set)
+		SET=1
+		BRIGHTNESS="$2"
+		shift
+		;;
+	-p | --path)
+		BRIGHTNESS_DIR="$2"
+		shift
+		;;
+	--)
+		shift
+		break
+		;;
+	*)
+		echo "Unknown argument '$1', use -h or --help for help"
+		exit 1
+		;;
+	esac
+	shift
+done
+
+# Define constants based on parsed arguments
+# ------------------------------------------------------------------------------------
+BRIGHTNESS_FILE="$BRIGHTNESS_DIR/brightness"
+BRIGHTNESS_MAX="$(cat $BRIGHTNESS_DIR/max_brightness)"
+
+# Helper functins
+# ------------------------------------------------------------------------------------
+
+# Send brightness level desktop notification, showing the given brightness level
+# as progress bar, along with given message.
+# $1 - brightness level (number 0-100)
+# $2 - message (notification body)
+send_brightness_notify() {
+	percent_brightness="$1"
+	msg="$2"
+
+	notify-send \
+		--app-name=brightness \
+		--urgency="$URGENCY" \
+		-h int:value:$percent_brightness \
+		-h string:synchronous:brightness \
+		"brightness" "$msg"
+}
+
+# Set brightness to given absolute value
+# $1 - brightness absolute value
+set_brightness() {
+	# there should be sudo config allowing this command without password
+	echo "$1" | sudo tee $BRIGHTNESS_FILE >/dev/null
+}
+
+# Main Logic
+# ------------------------------------------------------------------------------------
+
+# Determine the absolute new brightness level
+if [ $INCREASE -eq 1 ] || [ $DECREASE -eq 1 ] || [ $SET -eq 1 ]; then
+	# If we're dealing with percentages, change to absolutes
+	if echo "$BRIGHTNESS" | grep -qE '%$'; then
+		numeric=$(echo "$BRIGHTNESS" | sed 's/.$//')
+		absolute=$(echo "($BRIGHTNESS_MAX / 100) * $numeric" | bc -l)
+		BRIGHTNESS=$(printf "%.0f" $absolute)
+	fi
+
+	# Get the new requested absolute brightness
+	if [ $SET -eq 1 ]; then
+		new_brightness=$BRIGHTNESS
+	elif [ $DECREASE -eq 1 ]; then
+		cur_brightness=$(cat $BRIGHTNESS_FILE)
+		new_brightness=$(($cur_brightness - $BRIGHTNESS))
+	else
+		cur_brightness=$(cat $BRIGHTNESS_FILE)
+		new_brightness=$(($cur_brightness + $BRIGHTNESS))
+	fi
+
+	# Ensure we respect max/min boundaries
+	if [ $new_brightness -lt 0 ]; then
+		new_brightness=0
+	elif [ $new_brightness -gt $BRIGHTNESS_MAX ]; then
+		new_brightness=$BRIGHTNESS_MAX
+	fi
+
+	# Update the brightness
+	set_brightness $new_brightness
+fi
+
+cur_brightness=$(cat $BRIGHTNESS_FILE)
+percent_brightness=$(echo "($cur_brightness / $BRIGHTNESS_MAX) * 100" | bc -l)
+percent_brightness_2f=$(printf "%.2f" $percent_brightness)
+percent_brightness_rounded=$(printf "%.0f" $percent_brightness)
+
+if [ $SEND_NOTIFICATION -eq 1 ]; then
+	send_brightness_notify "$percent_brightness_rounded" "Level: $percent_brightness_rounded"
+fi
+
+echo "Brightness: ${percent_brightness_2f}% (absolute: $cur_brightness)"
diff --git a/home/programs/graphical/wms/hyprland/packages/brightness/default.nix b/home/programs/graphical/wms/hyprland/packages/brightness/default.nix
new file mode 100644
index 0000000..7a8d515
--- /dev/null
+++ b/home/programs/graphical/wms/hyprland/packages/brightness/default.nix
@@ -0,0 +1,6 @@
+{pkgs, ...}:
+  pkgs.writeShellScriptBin "brightness" ''
+    ${builtins.readFile ./brightness.sh}
+  ''
+
+
diff --git a/home/programs/graphical/wms/hyprland/packages/default.nix b/home/programs/graphical/wms/hyprland/packages/default.nix
index 47fca74..bbead15 100644
--- a/home/programs/graphical/wms/hyprland/packages/default.nix
+++ b/home/programs/graphical/wms/hyprland/packages/default.nix
@@ -5,6 +5,7 @@
   packages = {
     hyprland-swap-workspace = pkgs.callPackage ./hyprland-swap-workspace {};
     hyprland-move-window = pkgs.callPackage ./hyprland-move-window {};
+    brightness = pkgs.callPackage ./brightness {};
   };
 in
   packages