From f3360cf6d635d2d2e041263726af19c5b35e66ed Mon Sep 17 00:00:00 2001
From: Vyacheslav Demidyuk <vdemydiuk@gmail.com>
Date: Fri, 21 Feb 2025 12:23:42 +0200
Subject: [PATCH] PyMtApi5: implemented function ChartFirst

---
 PyMtApi5/client.py       | 17 +++++++++++++----
 PyMtApi5/mt5apiclient.py |  7 +++++--
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/PyMtApi5/client.py b/PyMtApi5/client.py
index cef4479a..ea2ba154 100644
--- a/PyMtApi5/client.py
+++ b/PyMtApi5/client.py
@@ -65,6 +65,7 @@ class Mt5ApiApp:
             "ChartTimePriceToXY": self.process_chart_time_price_to_xy,
             "ChartXYToTimePrice": self.process_chart_xy_to_time_price,
             "ChartOpen": self.process_chart_open,
+            "ChartFirst": self.process_chart_first,
         }
 
     def on_disconnect(self, error_msg=None):
@@ -96,15 +97,19 @@ class Mt5ApiApp:
 
     def process_command(self, mtapi, command):
         pieces = command.split(" ", 1)
-        if len(pieces) != 2 or not pieces[0] or not pieces[1]:
+        print(f"pieces count: {len(pieces)}")
+        if len(pieces) == 0 or len(pieces) > 2:
             print(f"! Invalid command format: {command.rstrip()}")
             return
-        if pieces[0] not in self.cmd_functions:
-            print(f"! Unknown command: {pieces[0]}")
+        command_name = pieces[0].rstrip()
+        if command_name not in self.cmd_functions:
+            print(f"! Unknown command: '{command_name}'")
             return
+        if len(pieces) == 1:
+            pieces.append("")
         params = pieces[1].rstrip()
         try:
-            self.cmd_functions[pieces[0]](mtapi, params)
+            self.cmd_functions[command_name](mtapi, params)
         except Exception as e:
             print(f"Failed to process command {command.rstrip()}: {e}")
 
@@ -487,6 +492,10 @@ class Mt5ApiApp:
         result = mtapi.chart_open(pieces[0], period)
         print(f"> ChartOpen: response = {result}")
 
+    def process_chart_first(self, mtapi, _):
+        result = mtapi.chart_first()
+        print(f"> ChartFirst: response = {result}")
+
     def mtapi_command_thread(self, mtapi):
         while mtapi.is_connected():
             filename = "client.cmd"
diff --git a/PyMtApi5/mt5apiclient.py b/PyMtApi5/mt5apiclient.py
index 4a75b19d..144bdbba 100644
--- a/PyMtApi5/mt5apiclient.py
+++ b/PyMtApi5/mt5apiclient.py
@@ -498,8 +498,11 @@ class Mt5ApiClient:
     # ChartOpen
     def chart_open(self, symbol: str, period: ENUM_TIMEFRAMES):
         cmd_params = {"Symbol": symbol, "Timeframe": period};
-        res = self.__send_command(self.__get_default_expert(), Mt5CommandType.ChartOpen, cmd_params)
-        return res
+        return self.__send_command(self.__get_default_expert(), Mt5CommandType.ChartOpen, cmd_params)
+
+    # ChartFirst
+    def chart_first(self):
+        return self.__send_command(self.__get_default_expert(), Mt5CommandType.ChartFirst)
 
     # Private methods