[V3 Config] Add MongoDB driver (#972)

* Basic Mongo Driver

* Update docstrings

* WIP motor support

* Use motor

* Update docs, add selective importer

* Make use of selective importer

* Fix docs

* Fix config storage location for JSON

* Add delimiters in the drivers doc section

* Make async things async

* Add basic config information for mongo driver

* get info from basic setup into config

* IT WORKS

* Add dependency for RJM's PR.

redbot/core/config.py

@@ -5,7 +5,7 @@ from typing import Callable, Union, Tuple
 import discord
 
 from .data_manager import cog_data_path, core_data_path
-from .drivers.red_json import JSON as JSONDriver
+from .drivers import get_driver
 
 log = logging.getLogger("red.config")
 
@@ -440,7 +440,18 @@ class Config:
         cog_name = cog_path_override.stem
         uuid = str(hash(identifier))
 
-        spawner = JSONDriver(cog_name, data_path_override=cog_path_override)
+        # We have to import this here otherwise we have a circular dependency
+        from .data_manager import basic_config
+
+        log.debug("Basic config: \n\n{}".format(basic_config))
+
+        driver_name = basic_config.get('STORAGE_TYPE', 'JSON')
+        driver_details = basic_config.get('STORAGE_DETAILS', {})
+
+        log.debug("Using driver: '{}'".format(driver_name))
+
+        spawner = get_driver(driver_name, cog_name, data_path_override=cog_path_override,
+                             **driver_details)
         return cls(cog_name=cog_name, unique_identifier=uuid,
                    force_registration=force_registration,
                    driver_spawn=spawner)
@@ -458,7 +469,16 @@ class Config:
             See `force_registration`.
 
         """
-        driver_spawn = JSONDriver("Core", data_path_override=core_data_path())
+        core_path = core_data_path()
+
+        # We have to import this here otherwise we have a circular dependency
+        from .data_manager import basic_config
+
+        driver_name = basic_config.get('STORAGE_TYPE', 'JSON')
+        driver_details = basic_config.get('STORAGE_DETAILS', {})
+
+        driver_spawn = get_driver(driver_name, "Core", data_path_override=core_path,
+                                  **driver_details)
         return cls(cog_name="Core", driver_spawn=driver_spawn,
                    unique_identifier='0',
                    force_registration=force_registration)
@@ -848,7 +868,7 @@ class Config:
 
         """
         if not scopes:
-            group = Group(identifiers=(self.unique_identifier),
+            group = Group(identifiers=(self.unique_identifier, ),
                           defaults={},
                           spawner=self.spawner)
         else: