config refactor (#1854)

* split out config

* add tests for base and app config, refactor client config out of app config

* refactor default config retrieval

* create config test class and helper functions

* move default_config into server to fix import issue

server/data_common/data_adaptor.py

@@ -5,7 +5,7 @@ import numpy as np
 import pandas as pd
 from server_timing import Timing as ServerTiming
 
-from server.common.app_config import AppFeature, AppConfig
+from server.common.config.app_config import AppConfig
 from server.common.constants import Axis
 from server.common.errors import FilterError, JSONEncodingValueError, ExceedsLimitError
 from server.common.utils.utils import jsonify_numpy
@@ -173,7 +173,7 @@ class DataAdaptor(metaclass=ABCMeta):
         mask = np.zeros((count,), dtype=np.bool)
         for i in filter:
             if type(i) == list:
-                mask[i[0]: i[1]] = True
+                mask[i[0] : i[1]] = True
             else:
                 mask[i] = True
         return mask
@@ -314,7 +314,7 @@ class DataAdaptor(metaclass=ABCMeta):
             top_n = self.dataset_config.diffexp__top_n
 
         if self.server_config.exceeds_limit(
-                "diffexp_cellcount_max", np.count_nonzero(obs_mask_A) + np.count_nonzero(obs_mask_B)
+            "diffexp_cellcount_max", np.count_nonzero(obs_mask_A) + np.count_nonzero(obs_mask_B)
         ):
             raise ExceedsLimitError("Diffexp request exceeds max cell count limit")
 
@@ -388,3 +388,17 @@ class DataAdaptor(metaclass=ABCMeta):
         except RuntimeError:
             lastmod = None
         return lastmod
+
+
+class AppFeature(object):
+    def __init__(self, path, available=False, method="POST", extra={}):
+        self.path = path
+        self.available = available
+        self.method = method
+        self.extra = extra
+        [setattr(self, key, value) for key, value in extra.items()]
+
+    def todict(self):
+        d = dict(available=self.available, method=self.method, path=self.path)
+        d.update(self.extra)
+        return d