Update database schema to use AUTOINCREMENT for user IDs and enforce UNIQUE constraint on destination.

Improve error handling for topic and emoticon loading.

Update time command to use server time directly.

Adjust effective limit calculation to use DISPLAY_LIMIT.

meshchat.mu

@@ -18,9 +18,9 @@ if not os.path.exists(DB_PATH):
     cursor = conn.cursor()
     cursor.execute("""
         CREATE TABLE users (
-            id INTEGER PRIMARY KEY,
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
             remote_identity TEXT,
-            dest TEXT,
+            dest TEXT UNIQUE NOT NULL,
             display_name TEXT
         );
     """)
@@ -274,14 +274,16 @@ safe_username = (
 
 # Функции темы чата
 topic_file = os.path.join(os.path.dirname(__file__), "topic.json")
+topic_data = {}
 try:
     with open(topic_file, "r") as tf:
         topic_data = json.load(tf)
         topic_text = topic_data.get("text", "Добро пожаловать в чат!")
         topic_author = topic_data.get("user", "System")
-except:
+except (IOError, json.JSONDecodeError, KeyError):
     topic_text = "Добро пожаловать в чат!"
     topic_author = "System"
+    topic_data = {}
 
 
 log_file = os.path.join(os.path.dirname(__file__), "chat_log.json")
@@ -549,7 +551,7 @@ elif cmd == "/time":
     try:
         import pytz, datetime
         user_time = datetime.datetime.now(pytz.timezone("Europe/Rome")).strftime("%Y-%m-%d %H:%M:%S")
-    except:
+    except (ImportError, AttributeError, OSError):
         user_time = "(Local time not available)"
     time_text = f"Server time: {server_time} // User time (Naples): {user_time}"
     log.append({"time": time.strftime("[%a,%H:%M]"), "user": "System", "text": time_text})
@@ -672,7 +674,6 @@ elif cmd == "/e":
             emojis = [line.strip() for line in f if line.strip()]
         
         if emojis and safe_username:
-            import random
             chosen = random.choice(emojis)
 
             # Treat emoji as a normal message
@@ -708,8 +709,6 @@ elif cmd.startswith("/c "):
     user_message = message[3:].strip().replace("`", "")  # Remove backticks to avoid formatting issues
 
     if user_message and safe_username:
-        import random, json
-
         def hex_brightness(hex_code):
             r = int(hex_code[0], 16)
             g = int(hex_code[1], 16)
@@ -1257,12 +1256,18 @@ def highlight_mentions_in_line(line, known_users):
     return re.sub(r"@(\w+)", replacer, line)
 
 ######## $E ДЛЯ ЭМОТИКОНОВ ######## 
-with open(EMO_DB, "r", encoding="utf-8") as f:
-    EMOTICONS = []
+EMOTICONS = []
+try:
+    with open(EMO_DB, "r", encoding="utf-8") as f:
         for line in f:
             EMOTICONS.extend(line.strip().split())
+except (IOError, OSError):
+    EMOTICONS = [":)", ":(", ":D", ":P"]
+
 # $e catching for emoticons in messages
 def substitute_emoticons_in_line(line):
+    if not EMOTICONS:
+        return line
     return re.sub(r"\$e", lambda _: random.choice(EMOTICONS), line)
 
 ######## УПОМИНАНИЯ ССЫЛОК ######

nomadnet.mu

@@ -18,9 +18,9 @@ if not os.path.exists(DB_PATH):
     cursor = conn.cursor()
     cursor.execute("""
         CREATE TABLE users (
-            id INTEGER PRIMARY KEY,
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
             remote_identity TEXT,
-            dest TEXT,
+            dest TEXT UNIQUE NOT NULL,
             display_name TEXT
         );
     """)
@@ -274,14 +274,16 @@ safe_username = (
 
 # Функции темы чата
 topic_file = os.path.join(os.path.dirname(__file__), "topic.json")
+topic_data = {}
 try:
     with open(topic_file, "r") as tf:
         topic_data = json.load(tf)
         topic_text = topic_data.get("text", "Добро пожаловать в чат!")
         topic_author = topic_data.get("user", "System")
-except:
+except (IOError, json.JSONDecodeError, KeyError):
     topic_text = "Добро пожаловать в чат!"
     topic_author = "System"
+    topic_data = {}
 
 
 log_file = os.path.join(os.path.dirname(__file__), "chat_log.json")
@@ -545,8 +547,7 @@ elif cmd == "/info":
 
 ############ КОМАНДА TIME ###############
 elif cmd == "/time":
-    from datetime import datetime
-    server_time = datetime.utcnow().strftime("%A, %B %d, %Y at %H:%M:%S UTC")
+    server_time = time.strftime("%A, %B %d, %Y at %H:%M:%S UTC")
     time_text = f"Текущее время сервера: {server_time}"
     log.append({"time": time.strftime("[%a,%H:%M]"), "user": "System", "text": time_text})
 
@@ -668,7 +669,6 @@ elif cmd == "/e":
             emojis = [line.strip() for line in f if line.strip()]
         
         if emojis and safe_username:
-            import random
             chosen = random.choice(emojis)
 
             # Treat emoji as a normal message
@@ -704,8 +704,6 @@ elif cmd.startswith("/c "):
     user_message = message[3:].strip().replace("`", "")  # Remove backticks to avoid formatting issues
 
     if user_message and safe_username:
-        import random, json
-
         def hex_brightness(hex_code):
             r = int(hex_code[0], 16)
             g = int(hex_code[1], 16)
@@ -1205,7 +1203,7 @@ def calculate_effective_limit(log, max_lines, max_chars):
 
     return max(effective_limit, 1), total_lines
 
-effective_limit, total_lines = calculate_effective_limit(log, MAX_LINES, MAX_CHARS)
+effective_limit, total_lines = calculate_effective_limit(log, DISPLAY_LIMIT, MAX_CHARS)
 
 
 ########## Динамическое преобразование времени сервера UTC в локальное время ########## 
@@ -1253,12 +1251,18 @@ def highlight_mentions_in_line(line, known_users):
     return re.sub(r"@(\w+)", replacer, line)
 
 ######## $E ДЛЯ ЭМОТИКОНОВ ######## 
-with open(EMO_DB, "r", encoding="utf-8") as f:
-    EMOTICONS = []
+EMOTICONS = []
+try:
+    with open(EMO_DB, "r", encoding="utf-8") as f:
         for line in f:
             EMOTICONS.extend(line.strip().split())
+except (IOError, OSError):
+    EMOTICONS = [":)", ":(", ":D", ":P"]
+
 # Перехват $e для эмотиконов в сообщениях
 def substitute_emoticons_in_line(line):
+    if not EMOTICONS:
+        return line
     return re.sub(r"\$e", lambda _: random.choice(EMOTICONS), line)
 
 ######## УПОМИНАНИЯ ССЫЛОК ######