refactored model, fixed utf-8 export json

src/model.py

@@ -0,0 +1,24 @@
+from connector import JSONConnector, Connector
+
+
+class Model:
+    def __init__(self, connector: Connector):
+        self.connector = connector
+
+    def get_all(self):
+        return self.connector.get_all()
+
+    def get_all_sorted_by(self, field: str, reverse: bool = False):
+        return self.connector.get_all_sorted_by(field=field, reverse=reverse)
+
+    def get_by_id(self, record_id: int):
+        return self.connector.get_by_id(record_id)
+
+    def delete_by_id(self, record_id: int):
+        self.connector.delete_by_id(record_id)
+
+    def update_record(self, new_record: dict):
+        self.connector.update_record(new_record)
+
+    def create_new(self, record: dict):
+        self.connector.create_new(record)