1 files changed, 104 insertions, 0 deletions
diff --git a/src/leap/bitmask/vpn/utils.py b/src/leap/bitmask/vpn/utils.py
new file mode 100644
index 0000000..51f24d9
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+++ b/src/leap/bitmask/vpn/utils.py
@@ -0,0 +1,104 @@
+# -*- coding: utf-8 -*-
+# util.py
+# Copyright (C) 2013-2017 LEAP
+#
+# 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/>.
+
+"""
+Common utils
+"""
+
+import os
+
+
+def get_path_prefix(standalone=False):
+    """
+    Returns the platform dependent path prefix.
+
+    :param standalone: if True it will return the prefix for a standalone
+                       application.
+                       Otherwise, it will return the system default for
+                       configuration storage.
+    :type standalone: bool
+    """
+    return os.path.expanduser("~/.config")  # hardcoded Linux XDG config path
+
+    # TODO: this is to use XDG specifications
+    # commented temporarily to avoid that extra dependency
+
+    # config_home = get_xdg_config_home()
+    # if standalone:
+    #     config_home = os.path.join(os.getcwd(), "config")
+    #
+    # return config_home
+
+
+def force_eval(items):
+    """
+    Return a sequence that evaluates any callable in the sequence,
+    instantiating it beforehand if the item is a class, and
+    leaves the non-callable items without change.
+    """
+    def do_eval(thing):
+        if isinstance(thing, type):
+            return thing()()
+        if callable(thing):
+            return thing()
+        return thing
+
+    if isinstance(items, (list, tuple)):
+        return map(do_eval, items)
+    else:
+        return do_eval(items)
+
+
+def first(things):
+    """
+    Return the head of a collection.
+
+    :param things: a sequence to extract the head from.
+    :type things: sequence
+    :return: object, or None
+    """
+    try:
+        return things[0]
+    except (IndexError, TypeError):
+        return None
+
+
+def get_vpn_launcher():
+    """
+    Return the VPN launcher for the current platform.
+    """
+    from leap.bitmask.vpn.constants import IS_LINUX, IS_MAC, IS_WIN
+
+    if not (IS_LINUX or IS_MAC or IS_WIN):
+        error_msg = "VPN Launcher not implemented for this platform."
+        raise NotImplementedError(error_msg)
+
+    launcher = None
+    if IS_LINUX:
+        from leap.bitmask.vpn.launchers.linux import LinuxVPNLauncher
+        launcher = LinuxVPNLauncher
+    elif IS_MAC:
+        from leap.bitmask.vpn.launchers.darwin import DarwinVPNLauncher
+        launcher = DarwinVPNLauncher
+    elif IS_WIN:
+        from leap.bitmask.vpn.launchers.windows import WindowsVPNLauncher
+        launcher = WindowsVPNLauncher
+
+    if launcher is None:
+        raise Exception("Launcher is None")
+
+    return launcher()