From aa502f8d730c03841a289d009d7c51e48ebddbb8 Mon Sep 17 00:00:00 2001
From: Ivan Malison <IvanMalison@gmail.com>
Date: Thu, 19 Oct 2017 21:02:36 -0700
Subject: [PATCH] Add macbook brightness

---
 dotfiles/config/xmonad/xmonad.hs       |  4 +-
 dotfiles/lib/bin/brightness.sh         |  3 ++
 dotfiles/lib/bin/macbook_brightness.py | 75 ++++++++++++++++++++++++++
 dotfiles/lib/bin/show_brightness.sh    |  9 ----
 4 files changed, 80 insertions(+), 11 deletions(-)
 create mode 100755 dotfiles/lib/bin/brightness.sh
 create mode 100755 dotfiles/lib/bin/macbook_brightness.py
 delete mode 100755 dotfiles/lib/bin/show_brightness.sh

diff --git a/dotfiles/config/xmonad/xmonad.hs b/dotfiles/config/xmonad/xmonad.hs
index a33f4c95..0f04d18d 100644
--- a/dotfiles/config/xmonad/xmonad.hs
+++ b/dotfiles/config/xmonad/xmonad.hs
@@ -1013,8 +1013,8 @@ addKeys conf@XConfig { modMask = modm } =
     , ((hyper .|. shiftMask, xK_q), spawn "toggle_mute_current_window.sh")
     , ((hctrl, xK_q), spawn "toggle_mute_current_window.sh only")
 
-    , ((0, xF86XK_MonBrightnessUp), spawn "show_brightness.sh")
-    , ((0, xF86XK_MonBrightnessDown), spawn "show_brightness.sh")
+    , ((0, xF86XK_MonBrightnessUp), spawn "brightness.sh 5")
+    , ((0, xF86XK_MonBrightnessDown), spawn "brightness.sh -5")
 
     ] ++
 
diff --git a/dotfiles/lib/bin/brightness.sh b/dotfiles/lib/bin/brightness.sh
new file mode 100755
index 00000000..fad0861b
--- /dev/null
+++ b/dotfiles/lib/bin/brightness.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env zsh
+
+volnoti-show $(sudo macbook_brightness.py -c "$@" -p)
diff --git a/dotfiles/lib/bin/macbook_brightness.py b/dotfiles/lib/bin/macbook_brightness.py
new file mode 100755
index 00000000..0efd77ba
--- /dev/null
+++ b/dotfiles/lib/bin/macbook_brightness.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python
+import argparse
+import os
+import sys
+
+
+class BrightnessManager(object):
+
+    @classmethod
+    def from_path(cls, path):
+        return cls(
+            set_brightness_filepath=os.path.join(path, "brightness"),
+            actual_brightness_filepath=os.path.join(path, "actual_brightness"),
+            max_brightness_filepath=os.path.join(path, "max_brightness"),
+        )
+
+    def __init__(
+            self, set_brightness_filepath, max_brightness_filepath, actual_brightness_filepath
+    ):
+        self.set_brightness_filepath = set_brightness_filepath
+        self.max_brightness_filepath = max_brightness_filepath
+        self.actual_brightness_filepath = actual_brightness_filepath
+
+    @property
+    def current_brightness(self):
+        with open(self.actual_brightness_filepath) as fd:
+            return int(fd.read())
+
+    @property
+    def max_brightness(self):
+        with open(self.max_brightness_filepath) as fd:
+            return int(fd.read())
+
+    @current_brightness.setter
+    def current_brightness(self, brightness):
+        with open(self.set_brightness_filepath, 'w') as fd:
+            fd.write(str(brightness))
+
+    def increment_by_proportion(self, proportion):
+        new_brightness = self.current_brightness + int(self.max_brightness * proportion)
+        new_brightness = min(new_brightness, self.max_brightness)
+        self.current_brightness = new_brightness
+
+    @property
+    def current_proportion(self):
+        return float(self.current_brightness) / self.max_brightness
+
+
+IntelBrightnessManager = BrightnessManager.from_path(
+    "/sys/class/backlight/intel_backlight",
+)
+
+
+def build_parser():
+    parser = argparse.ArgumentParser(
+        description='Interact with macbook brightness',
+    )
+    parser.add_argument(
+        "--change", "-c",
+        help="Change volume by the given percentage",
+        default=0
+    )
+    parser.add_argument(
+        "--print", "-p", dest="do_print",
+        action='store_true',
+        default=False
+    )
+    return parser
+
+
+if __name__ == '__main__':
+    args = build_parser().parse_args()
+    IntelBrightnessManager.increment_by_proportion(float(args.change) / 100)
+    if args.do_print:
+        print(int(IntelBrightnessManager.current_proportion * 100))
diff --git a/dotfiles/lib/bin/show_brightness.sh b/dotfiles/lib/bin/show_brightness.sh
deleted file mode 100755
index a10fdd91..00000000
--- a/dotfiles/lib/bin/show_brightness.sh
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/usr/bin/env sh
-
-actual="$(cat /sys/class/backlight/intel_backlight/actual_brightness)"
-max="$(cat /sys/class/backlight/intel_backlight/max_brightness)"
-
-temp="$(( $actual * 100 ))"
-percentage="$(( $temp/$max ))"
-
-volnoti-show "$percentage"