✨ feature. New grammar support

findmyorder/main.py

@@ -81,68 +81,6 @@ async def get_info(self):
         """
         return f"{__class__.__name__} {__version__}\n"
 
-    async def identify_order(
-        self,
-        my_string: str,
-    ) -> dict:
-        """
-        Identify an order and return a dictionary
-        with the order parameters
-
-        Args:
-            my_string (str): Message
-
-        Returns:
-            dict
-
-        """
-        try:
-            action = (
-                one_of(settings.action_identifier, caseless=True)
-                .set_results_name("action")
-                .set_parse_action(pyparsing_common.upcase_tokens)
-            )
-            instrument = Word(alphas).set_results_name("instrument")
-            stop_loss = Combine(
-                Suppress(settings.stop_loss_identifier) + Word(nums)
-            ).set_results_name("stop_loss")
-            take_profit = Combine(
-                Suppress(settings.take_profit_identifier) + Word(nums)
-            ).set_results_name("take_profit")
-            quantity = Combine(
-                Suppress(settings.quantity_identifier)
-                + Word(nums)
-                + Optional(Suppress("%"))
-            ).set_results_name("quantity")
-            order_type = one_of(
-                settings.order_type_identifier, caseless=True
-            ).set_results_name("order_type")
-            leverage_type = one_of(
-                settings.leverage_type_identifier, caseless=True
-            ).set_results_name("leverage_type")
-            comment = Combine(
-                Suppress(settings.comment_identifier) + Word(alphas)
-            ).set_results_name("comment")
-
-            order_grammar = (
-                action("action")
-                + Optional(instrument, default=None)
-                + Optional(stop_loss, default=settings.stop_loss)
-                + Optional(take_profit, default=settings.take_profit)
-                + Optional(quantity, default=settings.quantity)
-                + Optional(order_type, default=None)
-                + Optional(leverage_type, default=None)
-                + Optional(comment, default=None)
-            )
-
-            order = order_grammar.parse_string(instring=my_string, parse_all=False)
-            logger.debug("Order parsed {}", order)
-            return order.asDict()
-
-        except Exception as error:
-            logger.error(error)
-            return error
-
     async def get_order(
         self,
         msg: str,
@@ -191,3 +129,102 @@ async def replace_instrument(self, order):
                 break
         logger.debug("Instrument symbol changed", order)
         return order
+
+    async def identify_order(
+        self,
+        my_string: str,
+    ) -> dict:
+        """
+        Identify an order and return a dictionary
+        with the order parameters
+
+        Args:
+            my_string (str): Message
+
+        Returns:
+            dict
+
+        """
+        try:
+            matched_grammar_class = identify_grammar(my_string)
+
+            if matched_grammar_class:
+                order = matched_grammar_class.define_grammar(my_string)
+                return order
+
+        except Exception as error:
+            logger.error(error)
+            return error
+
+
+class Grammar1:
+    @staticmethod
+    def define_grammar(my_string: str):
+        action = (
+            one_of(settings.action_identifier, caseless=True)
+            .set_results_name("action")
+            .set_parse_action(pyparsing_common.upcase_tokens)
+        )
+        instrument = Word(alphas).set_results_name("instrument")
+        stop_loss = Combine(
+            Suppress(settings.stop_loss_identifier) + Word(nums)
+        ).set_results_name("stop_loss")
+        take_profit = Combine(
+            Suppress(settings.take_profit_identifier) + Word(nums)
+        ).set_results_name("take_profit")
+        quantity = Combine(
+            Suppress(settings.quantity_identifier)
+            + Word(nums)
+            + Optional(Suppress("%"))
+        ).set_results_name("quantity")
+        order_type = one_of(
+            settings.order_type_identifier, caseless=True
+        ).set_results_name("order_type")
+        leverage_type = one_of(
+            settings.leverage_type_identifier, caseless=True
+        ).set_results_name("leverage_type")
+        comment = Combine(
+            Suppress(settings.comment_identifier) + Word(alphas)
+        ).set_results_name("comment")
+
+        order_grammar = (
+            action("action")
+            + Optional(instrument, default=None)
+            + Optional(stop_loss, default=settings.stop_loss)
+            + Optional(take_profit, default=settings.take_profit)
+            + Optional(quantity, default=settings.quantity)
+            + Optional(order_type, default=None)
+            + Optional(leverage_type, default=None)
+            + Optional(comment, default=None)
+        )
+
+        order = order_grammar.parse_string(instring=my_string, parse_all=False)
+        logger.debug("Order parsed {}", order)
+        return order.asDict()
+
+
+class Grammar2:
+    @staticmethod
+    def define_grammar():
+        pass
+
+
+class Grammar3:
+    @staticmethod
+    def define_grammar():
+        pass
+
+
+def identify_grammar(my_string: str):
+    grammars = [Grammar1, Grammar2, Grammar3]
+
+    for grammar_class in grammars:
+        grammar = grammar_class.define_grammar()
+        try:
+            grammar.parse_string(instring=my_string, parse_all=False)
+            return grammar_class
+        except Exception:
+            logger.debug("Grammar {} not matched", grammar_class)
+            continue
+
+    return None