Start working on the code for the bot

core.py

@@ -75,7 +75,7 @@ def main():
                     # Skip the update
                     continue
                 # If the message is a start command...
-                if update.message.text == "/start":
+                if update.message.text is not None and update.message.text == "/start":
                     # Check if a worker already exists for that chat
                     old_worker = chat_workers.get(update.message.chat.id)
                     # If it exists, gracefully stop the worker

database.py

@@ -33,14 +33,14 @@ class User(TableDeclarativeBase):
     # Extra table parameters
     __tablename__ = "users"
 
-    def __init__(self, telegram_user: telegram.User, **kwargs):
+    def __init__(self, telegram_chat: telegram.Chat, **kwargs):
         # Initialize the super
         super().__init__(**kwargs)
         # Get the data from telegram
-        self.id = telegram_user.id
-        self.first_name = telegram_user.first_name
-        self.last_name = telegram_user.last_name
-        self.username = telegram_user.username
+        self.user_id = telegram_chat.id
+        self.first_name = telegram_chat.first_name
+        self.last_name = telegram_chat.last_name
+        self.username = telegram_chat.username
         # The starting wallet value is 0
         self.credit = decimal.Decimal("0")
 

strings.py

@@ -15,10 +15,26 @@ in_stock_format_string = "{quantity} disponibili"
 conversation_after_start = "Ciao!\n" \
                            "Benvenuto su greed!"
 
+# Answer: to send an inline keyboard you need to send a message with it
+conversation_open_user_menu = "Allora, {username}, cosa vorresti fare?"
+
 # Notification: the conversation has expired
 conversation_expired = "🕐 Il bot non ha ricevuto messaggi per un po' di tempo, quindi ha chiuso la conversazione.\n" \
                        "Per riavviarne una nuova, invia il comando /start."
 
+# User menu: order
+menu_order = "🛍 Ordina"
+
+
+# User menu: order status
+menu_order_status = "❓ Stato ordini"
+
+# User menu: add credit
+menu_add_credit = "💵 Ricarica"
+
+# User menu: bot info
+menu_info = "ℹ️ Informazioni sul bot"
+
 # Error: message received not in a private chat
 error_nonprivate_chat = "⚠️ Questo bot funziona solo in chat private."
 

worker.py

@@ -1,9 +1,11 @@
 import threading
+import typing
 import telegram
 import strings
 import configloader
 import sys
 import queue as queuem
+import database as db
 
 class StopSignal:
     """A data class that should be sent to the worker when the conversation has to be stopped abnormally."""
@@ -21,6 +23,11 @@ class ChatWorker(threading.Thread):
         # Store the bot and chat info inside the class
         self.bot = bot
         self.chat = chat
+        # Open a new database session
+        self.session = db.Session()
+        # Get the user db data from the users and admin tables
+        self.user = self.session.query(db.User).filter(db.User.user_id == self.chat.id).one_or_none()
+        self.admin = self.session.query(db.Admin).filter(db.Admin.user_id == self.chat.id).one_or_none()
         # The sending pipe is stored in the ChatWorker class, allowing the forwarding of messages to the chat process
         self.queue = queuem.Queue()
 
@@ -29,11 +36,20 @@ class ChatWorker(threading.Thread):
         # TODO: catch all the possible exceptions
         # Welcome the user to the bot
         self.bot.send_message(self.chat.id, strings.conversation_after_start)
-        # TODO: Send a command list or something
-        while True:
-            # For now, echo the sent message
-            update = self._receive_next_update()
-            self.bot.send_message(self.chat.id, f"{threading.current_thread().name} {update.message.text}")
+        # If the user isn't registered, create a new record and add it to the db
+        if self.user is None:
+            # Create the new record
+            self.user = db.User(self.chat)
+            # Add the new record to the db
+            self.session.add(self.user)
+            # Commit the transaction
+            self.session.commit()
+        # If the user is not an admin, send him to the user menu
+        if self.admin is None:
+            self.__user_menu()
+        # If the user is an admin, send him to the admin menu
+        else:
+            self.__admin_menu()
 
     def stop(self, reason: str=""):
         """Gracefully stop the worker process"""
@@ -42,7 +58,7 @@ class ChatWorker(threading.Thread):
         # Wait for the thread to stop
         self.join()
 
-    def _receive_next_update(self) -> telegram.Update:
+    def __receive_next_update(self) -> telegram.Update:
         """Get the next update from the queue.
         If no update is found, block the process until one is received.
         If a stop signal is sent, try to gracefully stop the thread."""
@@ -51,17 +67,69 @@ class ChatWorker(threading.Thread):
             data = self.queue.get(timeout=int(configloader.config["Telegram"]["conversation_timeout"]))
         except queuem.Empty:
             # If the conversation times out, gracefully stop the thread
-            self._graceful_stop()
+            self.__graceful_stop()
         # Check if the data is a stop signal instance
         if isinstance(data, StopSignal):
             # Gracefully stop the process
-            self._graceful_stop()
+            self.__graceful_stop()
         # Return the received update
         return data
 
-    def _graceful_stop(self):
+    def __wait_for_specific_message(self, items:typing.List[str]) -> str:
+        """Continue getting updates until until one of the strings contained in the list is received as a message."""
+        while True:
+            # Get the next update
+            update = self.__receive_next_update()
+            # Ensure the update contains a message
+            if update.message is None:
+                continue
+            # Ensure the message contains text
+            if update.message.text is None:
+                continue
+            # Check if the message is contained in the list
+            if update.message.text not in items:
+                continue
+            # Return the message text
+            return update.message.text
+
+    def __user_menu(self):
+        """Function called from the run method when the user is not an administrator.
+        Normal bot actions should be placed here."""
+        # Create a keyboard with the user main menu
+        keyboard = [[telegram.KeyboardButton(strings.menu_order)],
+                    [telegram.KeyboardButton(strings.menu_order_status)],
+                    [telegram.KeyboardButton(strings.menu_add_credit)],
+                    [telegram.KeyboardButton(strings.menu_info)]]
+        # Send the previously created keyboard to the user (ensuring it can be clicked only 1 time)
+        self.bot.send_message(self.chat.id, strings.conversation_open_user_menu.format(username=str(self.user)),
+                              reply_markup=telegram.ReplyKeyboardMarkup(keyboard, one_time_keyboard=True))
+        # Wait for a reply from the user
+        # TODO: change this
+        selection = self.__wait_for_specific_message([strings.menu_order, strings.menu_order_status,
+                                                      strings.menu_add_credit, strings.menu_info])
+        # If the user has selected the Order option...
+        if selection == strings.menu_order:
+            ...
+        # If the user has selected the Order Status option...
+        elif selection == strings.menu_order_status:
+            ...
+        # If the user has selected the Add Credit option...
+        elif selection == strings.menu_add_credit:
+            ...
+        # If the user has selected the Bot Info option...
+        elif selection == strings.menu_info:
+            ...
+
+
+    def __admin_menu(self):
+        """Function called from the run method when the user is an administrator.
+        Administrative bot actions should be placed here."""
+        self.bot.send_message(self.chat.id, "Sei un Amministralol")
+
+    def __graceful_stop(self):
         """Handle the graceful stop of the thread."""
         # Notify the user that the session has expired
         self.bot.send_message(self.chat.id, strings.conversation_expired)
+        # Close the database session
         # End the process
         sys.exit(0)