Add the missing env package

.gitignore

@@ -11,7 +11,7 @@ __pycache__/
 
 # Distribution / packaging
 .Python
-env/
+./env/
 build/
 develop-eggs/
 dist/

safeeyes/env/desktop.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python
+# Safe Eyes is a utility to remind you to take break frequently
+# to protect your eyes from eye strain.
+
+# Copyright (C) 2021  Gobinath
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+import logging
+import os
+import re
+import subprocess
+
+
+class DesktopEnvironment:
+    def __init__(self, name: str, display_server: str):
+        self.name: str = name
+        self.display_server: str = display_server
+
+    def is_wayland(self) -> bool:
+        return self.display_server == 'wayland'
+
+    def is_xorg(self) -> bool:
+        return self.display_server == 'xorg'
+
+    @staticmethod
+    def get_env():
+        return DesktopEnvironment(DesktopEnvironment.__get_desktop_env(),
+                                  'wayland' if DesktopEnvironment.__is_wayland() else 'xorg')
+
+    @staticmethod
+    def __get_desktop_env() -> str:
+        """
+        Detect the desktop environment.
+        """
+        desktop_session = os.environ.get('DESKTOP_SESSION')
+        current_desktop = os.environ.get('XDG_CURRENT_DESKTOP')
+        env = 'unknown'
+        if desktop_session is not None:
+            desktop_session = desktop_session.lower()
+            if desktop_session in ['gnome', 'unity', 'budgie-desktop', 'cinnamon', 'mate', 'xfce4', 'lxde', 'pantheon',
+                                   'fluxbox', 'blackbox', 'openbox', 'icewm', 'jwm', 'afterstep', 'trinity', 'kde']:
+                env = desktop_session
+            elif desktop_session.startswith('xubuntu') or (current_desktop is not None and 'xfce' in current_desktop):
+                env = 'xfce'
+            elif desktop_session.startswith('lubuntu'):
+                env = 'lxde'
+            elif 'plasma' in desktop_session or desktop_session.startswith('kubuntu') or os.environ.get(
+                    'KDE_FULL_SESSION') == 'true':
+                env = 'kde'
+            elif (os.environ.get('GNOME_DESKTOP_SESSION_ID') is not None) and (
+                    'deprecated' not in os.environ.get('GNOME_DESKTOP_SESSION_ID')):
+                env = 'gnome'
+            elif desktop_session.startswith('ubuntu'):
+                env = 'unity'
+        return env
+
+    @staticmethod
+    def __is_wayland() -> bool:
+        """
+        Determine if Wayland is running
+        https://unix.stackexchange.com/a/325972/222290
+        """
+        try:
+            session_id = subprocess.check_output(['loginctl']).split(b'\n')[1].split()[0]
+            output = subprocess.check_output(['loginctl', 'show-session', session_id, '-p', 'Type'])
+        except BaseException:
+            logging.warning('Unable to determine if wayland is running. Assuming no.')
+            return False
+        else:
+            return bool(re.search(b'wayland', output, re.IGNORECASE))

safeeyes/env/system.py

@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+# Safe Eyes is a utility to remind you to take break frequently
+# to protect your eyes from eye strain.
+
+# Copyright (C) 2021  Gobinath
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+import importlib.util
+import os
+import shutil
+import subprocess
+from typing import List, Optional
+
+from safeeyes import SAFE_EYES_CONFIG_DIR, SAFE_EYES_HOME_DIR
+
+
+def execute(command: List[str]) -> None:
+    """
+    Execute the shell command without waiting for its response.
+    """
+    if command:
+        subprocess.Popen(command)
+
+
+def module_exists(module: str) -> bool:
+    """
+    Check whether the given Python module exists.
+    """
+    result = importlib.util.find_spec(module)
+    return bool(result)
+
+
+def command_exists(command: str) -> bool:
+    """
+    Check whether the given command exist in the system or not.
+    """
+    if shutil.which(command):
+        return True
+    return False
+
+
+def get_resource_path(resource_name: str) -> Optional[str]:
+    """
+    Return the user-defined resource if a system resource is overridden by the user.
+    Otherwise, return the system resource. Return None if the specified resource does not exist.
+    """
+    if resource_name is None:
+        return None
+    resource_location = os.path.join(SAFE_EYES_CONFIG_DIR, 'resource', resource_name)
+    if not os.path.isfile(resource_location):
+        resource_location = os.path.join(SAFE_EYES_HOME_DIR, 'resource', resource_name)
+        if not os.path.isfile(resource_location):
+            # Resource not found
+            return None
+
+    return resource_location