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neural_network/chatbot/chat_db.py

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+import os
+import mysql.connector
+import datetime
+from dotenv import load_dotenv
+from together import Together
+from groq import Groq
+
+load_dotenv()
+
+# Database configuration
+db_config = {
+    "user": os.environ.get("DB_USER"),
+    "password": os.environ.get("DB_PASSWORD"),
+    "host": os.environ.get("DB_HOST"),
+    "database": os.environ.get("DB_NAME"),
+}
+
+api_service = os.environ.get("API_SERVICE")
+
+
+def create_tables() -> None:
+    """
+    Create the ChatDB.Chat_history and ChatDB.Chat_data tables if they do not exist.
+    Also, create a trigger to update is_stream in Chat_data when Chat_history.is_stream is updated.
+    """
+    try:
+        conn = mysql.connector.connect(**db_config)
+        cursor = conn.cursor()
+
+        cursor.execute(
+            """
+        CREATE TABLE IF NOT EXISTS ChatDB.Chat_history (
+            chat_id INT AUTO_INCREMENT PRIMARY KEY,
+            start_time DATETIME,
+            is_stream INT
+        )
+        """
+        )
+
+        cursor.execute(
+            """
+        CREATE TABLE IF NOT EXISTS ChatDB.Chat_data (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            chat_id INT,
+            user TEXT,
+            assistant TEXT,
+            FOREIGN KEY (chat_id) REFERENCES ChatDB.Chat_history(chat_id)
+        )
+        """
+        )
+
+        cursor.execute("DROP TRIGGER IF EXISTS update_is_stream;")
+
+        cursor.execute(
+            """
+        CREATE TRIGGER update_is_stream
+        AFTER UPDATE ON ChatDB.Chat_history
+        FOR EACH ROW
+        BEGIN
+            UPDATE ChatDB.Chat_data
+            SET is_stream = NEW.is_stream
+            WHERE chat_id = NEW.chat_id;
+        END;
+        """
+        )
+
+        conn.commit()
+    except mysql.connector.Error as err:
+        print(f"Error: {err}")
+    finally:
+        cursor.close()
+        conn.close()
+    print("Tables and trigger created successfully")
+
+
+def insert_chat_history(start_time: datetime.datetime, is_stream: int) -> None:
+    """
+    Insert a new row into the ChatDB.Chat_history table.
+    :param start_time: Timestamp of when the chat started
+    :param is_stream: Indicator of whether the conversation is ongoing, starting, or ending
+    """
+    try:
+        conn = mysql.connector.connect(**db_config)
+        cursor = conn.cursor()
+        cursor.execute(
+            """
+            INSERT INTO ChatDB.Chat_history (start_time, is_stream)
+            VALUES (%s, %s)
+        """,
+            (start_time, is_stream),
+        )
+        conn.commit()
+    except mysql.connector.Error as err:
+        print(f"Error: {err}")
+    finally:
+        cursor.close()
+        conn.close()
+
+
+def get_latest_chat_id() -> int:
+    """
+    Retrieve the latest chat_id from the ChatDB.Chat_history table.
+    :return: The latest chat_id or None if no chat_id exists.
+    """
+    try:
+        conn = mysql.connector.connect(**db_config)
+        cursor = conn.cursor()
+        cursor.execute(
+            """
+            SELECT chat_id FROM ChatDB.Chat_history 
+            ORDER BY chat_id DESC LIMIT 1
+        """
+        )
+        chat_id = cursor.fetchone()[0]
+        return chat_id if chat_id else None
+    except mysql.connector.Error as err:
+        print(f"Error: {err}")
+        return None
+    finally:
+        cursor.close()
+        conn.close()
+
+
+def insert_chat_data(chat_id: int, user_message: str, assistant_message: str) -> None:
+    """
+    Insert a new row into the ChatDB.Chat_data table.
+    :param chat_id: The ID of the chat session
+    :param user_message: The user's message
+    :param assistant_message: The assistant's message
+    """
+    try:
+        conn = mysql.connector.connect(**db_config)
+        cursor = conn.cursor()
+        cursor.execute(
+            """
+            INSERT INTO ChatDB.Chat_data (chat_id, user, assistant)
+            VALUES (%s, %s, %s)
+        """,
+            (chat_id, user_message, assistant_message),
+        )
+        conn.commit()
+    except mysql.connector.Error as err:
+        print(f"Error: {err}")
+    finally:
+        cursor.close()
+        conn.close()
+
+
+def generate_llm_response(
+    conversation_history: list[dict], api_service: str = "Groq"
+) -> str:
+    """
+    Generate a response from the LLM based on the conversation history.
+    :param conversation_history: List of dictionaries representing the conversation so far
+    :param api_service: Choose between "Together" or "Groq" as the API service
+    :return: Assistant's response as a string
+    """
+    bot_response = ""
+    if api_service == "Together":
+        client = Together(api_key=os.environ.get("TOGETHER_API_KEY"))
+        response = client.chat.completions.create(
+            model="meta-llama/Llama-3.2-3B-Instruct-Turbo",
+            messages=conversation_history,
+            max_tokens=512,
+            temperature=0.3,
+            top_p=0.7,
+            top_k=50,
+            repetition_penalty=1,
+            stop=["<|eot_id|>", "<|eom_id|>"],
+            stream=False,
+        )
+        bot_response = response.choices[0].message.content
+    else:
+        client = Groq(api_key=os.environ.get("GROQ_API_KEY"))
+        response = client.chat.completions.create(
+            model="llama3-8b-8192",
+            messages=conversation_history,
+            max_tokens=1024,
+            temperature=0.3,
+            top_p=0.7,
+            stop=["<|eot_id|>", "<|eom_id|>"],
+            stream=False,
+        )
+        bot_response = response.choices[0].message.content
+
+    return bot_response
+
+
+def chat_session() -> None:
+    """
+    Start a chatbot session, allowing the user to interact with the LLM.
+    Saves conversation history in the database and ends the session on "/stop" command.
+    """
+    print("Welcome to the chatbot! Type '/stop' to end the conversation.")
+
+    conversation_history = []
+    start_time = datetime.datetime.now()
+    chat_id_pk = None
+    api_service = "Groq"  # or "Together"
+
+    while True:
+        user_input = input("\nYou: ").strip()
+        conversation_history.append({"role": "user", "content": user_input})
+
+        if chat_id_pk is None:
+            if user_input.lower() == "/stop":
+                break
+            bot_response = generate_llm_response(conversation_history, api_service)
+            conversation_history.append({"role": "assistant", "content": bot_response})
+
+            is_stream = 1  # New conversation
+            insert_chat_history(start_time, is_stream)
+            chat_id_pk = get_latest_chat_id()
+            insert_chat_data(chat_id_pk, user_input, bot_response)
+        else:
+            if user_input.lower() == "/stop":
+                is_stream = 2  # End of conversation
+                current_time = datetime.datetime.now()
+                insert_chat_history(current_time, is_stream)
+                break
+
+            bot_response = generate_llm_response(conversation_history, api_service)
+            conversation_history.append({"role": "assistant", "content": bot_response})
+
+            is_stream = 0  # Continuation of conversation
+            current_time = datetime.datetime.now()
+            insert_chat_history(current_time, is_stream)
+            insert_chat_data(chat_id_pk, user_input, bot_response)
+
+        if len(conversation_history) > 1000:
+            conversation_history = conversation_history[-3:]
+
+
+# Example of starting a chat session
+create_tables()
+chat_session()