fix candle/book exiting if coin wasnt selected

gamestonk_terminal/cryptocurrency/binance_model.py

@@ -73,15 +73,17 @@ def select_binance_coin(other_args: List[str]):
         return None, None
 
 
-def order_book(coin: str, other_args: List[str]):
+def order_book(other_args: List[str], coin: str, currency: str):
     """Get order book for currency
 
     Parameters
     ----------
-    coin: str
-        Coin to get order book for
     other_args: List[str]
         Argparse arguments
+    coin: str
+        Coin to get symbol of
+    currency : str
+        Currency against which to check symbol
     """
     limit_list = [5, 10, 20, 50, 100, 500, 1000, 5000]
     parser = argparse.ArgumentParser(
@@ -98,6 +100,12 @@ def order_book(coin: str, other_args: List[str]):
     )
 
     try:
+        if not coin or not currency:
+            print("Coin needs to be selected prior to this command\n")
+            return
+        else:
+            coin += currency
+
         ns_parser = parse_known_args_and_warn(parser, other_args)
         if not ns_parser:
             return
@@ -113,16 +121,17 @@ def order_book(coin: str, other_args: List[str]):
         print(e, "\n")
 
 
-def show_candles(coin: str, other_args: List[str]):
+def show_candles(other_args: List[str], coin: str, currency: str):
     """Get klines/candles for coin
 
     Parameters
     ----------
-    coin: str
-        Coin to get symbol of
     other_args: List[str]
         Argparse arguments
-
+    coin: str
+        Coin to get symbol of
+    currency : str
+        Currency against which to check symbol
     """
     client = Client(cfg.API_BINANCE_KEY, cfg.API_BINANCE_SECRET)
 
@@ -165,9 +174,16 @@ def show_candles(coin: str, other_args: List[str]):
     )
 
     try:
+        if not coin or not currency:
+            print("Coin needs to be selected prior to this command\n")
+            return
+        else:
+            coin += currency
+
         ns_parser = parse_known_args_and_warn(parser, other_args)
         if not ns_parser:
             return
+
         candles = client.get_klines(
             symbol=coin,
             interval=interval_map[ns_parser.interval],

gamestonk_terminal/cryptocurrency/crypto_controller.py

@@ -115,13 +115,11 @@ class CryptoController:
 
     def call_book(self, other_args):
         """Process book command"""
-        binance_model.order_book(self.current_coin + self.current_currency, other_args)
+        binance_model.order_book(other_args, self.current_coin, self.current_currency)
 
     def call_candle(self, other_args):
         """Process candle command"""
-        binance_model.show_candles(
-            self.current_coin + self.current_currency, other_args
-        )
+        binance_model.show_candles(other_args, self.current_coin, self.current_currency)
 
     def call_balance(self, _):
         """Process balance command"""