Move opening kanji lists into get_lists_data function

src/commands/kanji.rs

@@ -36,16 +36,21 @@ async fn display_kanji(ctx: &Context, msg: &Message, kanji: char, comment: &str)
     Ok(())
 }
 
+fn get_lists_data() -> Value {
+    let mut lists_file = File::open("kanji_lists.json").unwrap();
+    let mut lists_json = String::new();
+    lists_file.read_to_string(&mut lists_json).unwrap();
+    let lists_data: Value = serde_json::from_str(&lists_json).unwrap();
+    lists_data
+}
+
 async fn random_kanji(
     category: &str,
     ctx: &Context,
     msg: &Message,
     mut args: Args,
 ) -> CommandResult {
-    let mut lists_file = File::open("kanji_lists.json").unwrap();
+    let lists_data = get_lists_data();
-    let mut lists_json = String::new();
-    lists_file.read_to_string(&mut lists_json).unwrap();
-    let lists_data: Value = serde_json::from_str(&lists_json).unwrap();
     let category = &lists_data[category];
     let default_version = category["default"].as_str().unwrap();
     let list = &category["versions"][default_version]["characters"];