Prepare for new anki format

src/data_provider/import.rs

@@ -5,6 +5,7 @@ use log::info;
 use rusqlite::Connection;
 use serde_json::Value;
 use std::collections::BTreeMap;
+use crate::pages::import::AnkiSchema;
 
 #[derive(Clone)]
 pub struct ImportData(pub(crate) Vec<ImportGroup>);
@@ -25,7 +26,18 @@ pub struct ImportNote {
     pub fields: Vec<String>,
 }
 
-pub fn load_groups(connection: &Connection) -> Result<ImportData, NotificationData> {
+pub fn load_groups(connection: &Connection, schema: AnkiSchema) -> Result<ImportData, NotificationData> {
+    match schema {
+        AnkiSchema::Old => {
+            load_old_schema(connection)
+        }
+        AnkiSchema::Beta => {
+            load_new_schema(connection)
+        }
+    }
+}
+
+fn load_old_schema(connection: &Connection) -> Result<ImportData, NotificationData> {
     let json_models: String = connection
         .query_one("select models from col", (), |row| row.get(0))
         .map_err(|_| IncorrectAnkiFile)?;
@@ -82,7 +94,9 @@ pub fn load_groups(connection: &Connection) -> Result<ImportData, NotificationDa
     }
     Err(IncorrectAnkiFile)
 }
-
+fn load_new_schema(connection: &Connection) -> Result<ImportData, NotificationData> {
+    return Err(IncorrectAnkiFile);
+}
 pub fn get_words_of_group(
     connection: &Connection,
     group_id: u64,