From 6f822c52ebb8f29692d2d02a22912150ce4331ec Mon Sep 17 00:00:00 2001
From: Trygve <trygve@posteo.net>
Date: Tue, 5 Dec 2023 22:39:12 +0100
Subject: [PATCH] La til lesing av mtr statusmelding

---
 otime/cli.py | 44 +++++++++++++++++++++++++++++++++++++-------
 1 file changed, 37 insertions(+), 7 deletions(-)

diff --git a/otime/cli.py b/otime/cli.py
index d0b1c93..9a54e8e 100644
--- a/otime/cli.py
+++ b/otime/cli.py
@@ -1,5 +1,6 @@
 import argparse
 import file_io
+import datetime
 import iof_xml
 import serial
 import subprocess
@@ -12,6 +13,7 @@ from rich import print
 import search_tui
 
 from rich.traceback import install
+from rich import inspect
 install(show_locals=True)
 
 # Main entrypoint for now. Cli with two options; init will make the files needed and run will start the program from the specified directory
@@ -40,7 +42,9 @@ def main():
     parser_init.add_argument('--xml', required=False, dest='xml_path', action='store', default=None, help='Where the xml result file should be saved')
 
     parser_init = subparsers.add_parser('mtr', help='run mtr commands')
-    parser_init.add_argument('--port', required=False, dest='port', action='store', help='specify a serial port')
+    parser_init.add_argument('--port', required=True, dest='port', action='store', help='specify a serial port')
+    parser_init.add_argument('--spool', required=False, dest='mtr_spool', action='store_true', help='Spool all mtr data')
+    parser_init.add_argument('--status', required=False, dest='mtr_status', action='store_true', help='Spool all mtr data')
 
     args = parser.parse_args()
 
@@ -61,7 +65,12 @@ def main():
             gen(args.dir, args.xml_path)
         case 'mtr':
             mtr = serial.Serial(port=args.port, baudrate=9600, timeout=40)
-            mtr.write(b'/SA')
+            if args.mtr_spool:
+                mtr.write(b'/SA')
+            if args.mtr_status:
+                mtr.write(b'/ST')
+        case other:
+            parser.print_help()
 
 def init_dir(project_dir, entries_xml_file, courses_xml_file):
     # Lager mappe med en config fil, en csv fil med løpere og en fil med mtr data
@@ -96,20 +105,34 @@ def run(port='/dev/ttyUSB0', project_dir='./', xml_path='./output/'):
             if size == b'\xe6':
                 event = file_io.event_from_yaml_and_csv(config_path, mtr_path, csv_path)
                 meat = mtr.read(229)
-                full = b'\xFF\xFF\xFF\xFF' + size + meat
-                card_dump = otime.CardDump.from_mtr_bytes(full)
+                message = b'\xFF\xFF\xFF\xFF' + size + meat
+                card_dump = otime.CardDump.from_mtr_bytes(message)
                 event.card_dumps.append(card_dump)
                 file_io.write_card_dumps(event, mtr_path)
                 print(runner_info(event, card_dump))
                 subprocess.run(['git', 'add', './*'], cwd=project_dir, stdout=subprocess.DEVNULL)
                 subprocess.run(['git', 'commit', '-m', f'Added {card_dump.card}'], cwd=project_dir, stdout=subprocess.DEVNULL)
-                
+                if not is_checksum_valid(message):
+                    print('[red]Checksum is not valid![red]')
                 iof_xml.create_result_file(event, xml_path + '/results.xml')
                 pdf.create_result_list(event, project_dir + '/output/results.pdf')
                 
             elif size == b'\x37':
-                meat = mtr.read(55)
-                inspect(status)
+                meat = mtr.read(54)
+                message = b'\xFF\xFF\xFF\xFF' + size + meat
+                
+                mtr_id = int.from_bytes(message[6:8], 'little')
+                year = int.from_bytes(message[8:9], 'little')
+                month = int.from_bytes(message[9:10], 'little')
+                day = int.from_bytes(message[10:11], 'little')
+                hours =int.from_bytes(message[11:12], 'little')
+                minutes = int.from_bytes(message[12:13], 'little')
+                seconds = int.from_bytes(message[13:14], 'little')
+                milliseconds =int.from_bytes(message[14:16], 'little')
+                battery_status = int.from_bytes(message[16:17], 'little')
+                time = datetime.datetime(year, month, day, hours, minutes, seconds, milliseconds)
+                print(f'MTR status message: id: {mtr_id}, time: {time}, battery: {battery_status}')
+
 
 def gen(project_dir='./', xml_path='./output/'):
     config_path = project_dir + '/config.yaml'
@@ -137,5 +160,12 @@ def runner_info(event, card_dump):
         result_text = f'[blue]{result.status}, Time: [bold][yellow]{result.total_time}[/yellow][/bold][/blue]'
     return result_text + f' [blue]{result.fullname()}[/blue], {result.o_class}, {result.club}, [italic]Card: {result.card_id}[/italic]'
 
+def is_checksum_valid(message):
+    # Hentet fra https://github.com/knutsiem/mtr-log-extractor
+    checksum = int.from_bytes(message[232:233], 'little')
+    # calculate checksum for message bytes up until checksum
+    calculated_checksum = sum(message[:232]) % 256
+    return checksum == calculated_checksum
+
 if __name__ == '__main__':
     main()
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