finish api basic setup

api/__init__.py

@@ -0,0 +1,60 @@
+from flask import Flask, Blueprint
+from . import commands, login
+from .settings import ProdConfig, Config
+from .extensions import db, migrate, jwt
+from .exceptions import ApiException
+
+
+def create_app(config: Config = ProdConfig) -> Flask:
+    """An application factory, as explained here:
+    http://flask.pocoo.org/docs/patterns/appfactories/.
+
+    :param config_object: The configuration object to use.
+    """
+    app = Flask(__name__.split('.')[0])
+    app.url_map.strict_slashes = False
+    app.config.from_object(config)
+    register_extensions(app)
+    register_blueprints(app)
+    register_errorhandlers(app)
+    register_shellcontext(app)
+    register_commands(app)
+
+    return app
+
+
+def register_extensions(app: Flask):
+    """Register Flask extensions."""
+    db.init_app(app)
+    migrate.init_app(app, db)
+    jwt.init_app(app)
+
+
+def register_blueprints(app: Flask):
+    """Register Flask blueprints."""
+    pass
+
+
+def register_errorhandlers(app: Flask):
+    def errorHandler(error: ApiException):
+        return error.to_response()
+
+    app.errorhandler(ApiException)(errorHandler)
+    pass
+
+
+def register_shellcontext(app: Flask):
+    """Register shell context objects."""
+    def shell_context():
+        """Shell context objects."""
+        return {
+            'db': db,
+        }
+
+    app.shell_context_processor(shell_context)
+
+
+def register_commands(app: Flask):
+    """Register Click commands."""
+    app.cli.add_command(commands.clean)
+    app.cli.add_command(commands.urls)