Move list of all available addons to own api call (#24)

* Move list of all available addons to own api call

* fix lint

* fix lint

* fix style

API.md

@@ -26,6 +26,8 @@ On success
 
 - GET `/supervisor/info`
 
+The addons from `addons` are only installed one.
+
 ```json
 {
     "version": "INSTALL_VERSION",
@@ -36,7 +38,7 @@ On success
             "name": "xy bla",
             "slug": "xy",
             "version": "LAST_VERSION",
-            "installed": "none|INSTALL_VERSION",
+            "installed": "INSTALL_VERSION",
             "dedicated": "bool",
             "description": "description"
         }
@@ -47,6 +49,23 @@ On success
 }
 ```
 
+- GET `/supervisor/addons`
+
+Get all available addons
+
+```json
+[
+    {
+        "name": "xy bla",
+        "slug": "xy",
+        "version": "LAST_VERSION",
+        "installed": "none|INSTALL_VERSION",
+        "dedicated": "bool",
+        "description": "description"
+    }
+]
+```
+
 - POST `/supervisor/update`
 Optional:
 ```json

hassio/api/__init__.py

@@ -48,6 +48,8 @@ class RestAPI(object):
 
         self.webapp.router.add_get('/supervisor/ping', api_supervisor.ping)
         self.webapp.router.add_get('/supervisor/info', api_supervisor.info)
+        self.webapp.router.add_get(
+            '/supervisor/addons', api_supervisor.available_addons)
         self.webapp.router.add_post(
             '/supervisor/update', api_supervisor.update)
         self.webapp.router.add_post(

hassio/api/supervisor.py

@@ -46,9 +46,14 @@ class APISupervisor(object):
             ATTR_LAST_VERSION: self.config.last_hassio,
             ATTR_BETA_CHANNEL: self.config.upstream_beta,
             ATTR_ADDONS: self.addons.list_api,
-            ATTR_ADDONS_REPOSITORIES: list(self.config.addons_repositories),
+            ATTR_ADDONS_REPOSITORIES: self.config.addons_repositories,
         }
 
+    @api_process
+    async def available_addons(self, request):
+        """Return information for all available addons."""
+        return self.addons.list_api
+
     @api_process
     async def options(self, request):
         """Set supervisor options."""

hassio/api/util.py

@@ -30,7 +30,7 @@ def api_process(method):
         except RuntimeError as err:
             return api_return_error(message=str(err))
 
-        if isinstance(answer, dict):
+        if isinstance(answer, (dict, list)):
             return api_return_ok(data=answer)
         elif answer:
             return api_return_ok()