base config and json-config

an initial attempt at stablishing base classes
for config. we go with a jsonconfig by now, and
will switch to a different storage backend in near
future.

things will surely be broken at this state;
i'm splitting work on different commits.

1 files changed, 81 insertions, 0 deletions

diff --git a/src/leap/base/config.py b/src/leap/base/config.py
new file mode 100644
index 00000000..ccbf3c89
--- /dev/null
+++ b/src/leap/base/config.py
@@ -0,0 +1,81 @@
+"""
+Configuration Base Class
+"""
+import configuration  # python configuration module, not local!
+import os
+
+from leap.eip import config as eip_config
+
+
+class BaseLeapConfig(object):
+    slug = None
+
+    # XXX we have to enforce that we have a slug (via interface)
+    # get property getter that raises NI..
+
+    def save(self):
+        raise NotImplementedError("abstract base class")
+
+    def load(self):
+        raise NotImplementedError("abstract base class")
+
+    def get_config(self, *kwargs):
+        raise NotImplementedError("abstract base class")
+
+    #XXX todo: enable this property after
+    #fixing name clash with "config" in use at
+    #vpnconnection
+
+    #@property
+    #def config(self):
+        #return self.get_config()
+
+    def get_value(self, *kwargs):
+        raise NotImplementedError("abstract base class")
+
+
+class JSONLeapConfig(BaseLeapConfig):
+
+    def __init__(self, *args, **kwargs):
+        # sanity check
+        assert self.slug is not None
+        assert self.spec is not None
+        assert issubclass(self.spec, configuration.Configuration)
+
+        self._config = self.spec()
+        self._config.parse_args(list(args))
+
+    # mandatory baseconfig interface
+
+    def save(self, to=None):
+        if to is None:
+            to = self.filename
+        self._config.serialize(to)
+
+    def load(self, fromfile=None):
+        # load should get a much more generic
+        # argument. it could be, f.i., from_uri,
+        # and call to Fetcher
+
+        if fromfile is None:
+            fromfile = self.filename
+        self._config.deserialize(fromfile)
+
+    def get_config(self):
+        return self._config.config
+
+    # public methods
+
+    def get_filename(self):
+        return self._slug_to_filename()
+
+    @property
+    def filename(self):
+        return self.get_filename()
+
+    def _slug_to_filename(self):
+        # is this going to work in winland if slug is "foo/bar" ?
+        folder, filename = os.path.split(self.slug)
+        # XXX fix import
+        config_file = eip_config.get_config_file(filename, folder)
+        return config_file