core library (#711)

* move app creation to function

* create engine without load

* flake 8 fixes

* cleanup original scanpy test

* add default config

* handle missing data

* test data changes

* unify update

* load data isn't static anymore

* make app a class

server/app/app.py

@@ -5,27 +5,29 @@ from flask_caching import Cache
 from flask_compress import Compress
 from flask_cors import CORS
 
-from .rest_api.rest import get_api_resources
-from .util.utils import Float32JSONEncoder
-from .web import webapp
+from server.app.rest_api.rest import get_api_resources
+from server.app.util.utils import Float32JSONEncoder
+from server.app.web import webapp
 
-REACTIVE_LIMIT = 1_000_000
 
-app = Flask(__name__, static_folder="web/static")
-app.json_encoder = Float32JSONEncoder
-cache = Cache(app, config={"CACHE_TYPE": "simple", "CACHE_DEFAULT_TIMEOUT": 860_000})
-Compress(app)
-CORS(app)
+class Server:
+    def __init__(self):
+        self.data = None
+        self.cache = Cache(config={"CACHE_TYPE": "simple", "CACHE_DEFAULT_TIMEOUT": 860_000})
 
-# Config
-SECRET_KEY = os.environ.get("CXG_SECRET_KEY", default="SparkleAndShine")
+    def create_app(self):
+        app = Flask(__name__, static_folder="web/static")
+        app.json_encoder = Float32JSONEncoder
+        self.cache.init_app(app)
+        Compress(app)
+        CORS(app)
 
-app.config.update(SECRET_KEY=SECRET_KEY)
+        # Config
+        SECRET_KEY = os.environ.get("CXG_SECRET_KEY", default="SparkleAndShine")
+        app.config.update(SECRET_KEY=SECRET_KEY)
 
-# Application Data
-data = None
-
-resources = get_api_resources()
-app.register_blueprint(webapp.bp)
-app.register_blueprint(resources.blueprint)
-app.add_url_rule("/", endpoint="index")
+        resources = get_api_resources()
+        app.register_blueprint(webapp.bp)
+        app.register_blueprint(resources.blueprint)
+        app.add_url_rule("/", endpoint="index")
+        return app