adding master api project

Master/master/resources/instance.py

@@ -0,0 +1,37 @@
+from flask_restful import Resource
+from flask import request
+from flask_jwt_extended import jwt_required
+from marshmallow import ValidationError
+from master.schema.instanceschema import InstanceSchema
+from master import ctx
+
+class Instance(Resource):
+    def get(self, id=None):
+        if id is None:
+            schema = InstanceSchema(many=True)
+            instances = schema.dump(ctx.instance_list.values())
+            return instances
+        else:
+            try:
+                instance = ctx.get_instance(id)
+                return InstanceSchema().dump(instance)
+            except KeyError:
+                return {'message' : 'instance not found'}, 404
+
+    @jwt_required
+    def put(self, id):
+        try:
+            instance = InstanceSchema().load(request.json)
+        except ValidationError as err:
+            return {'message' : err.messages }, 400
+        ctx.update_instance(instance)
+        return InstanceSchema().dump(instance)
+
+    @jwt_required
+    def post(self):
+        try:
+            instance = InstanceSchema().load(request.json)
+        except ValidationError as err:
+            return err.messages
+        ctx.add_instance(instance)
+        return InstanceSchema().dump(instance)