1 files changed, 207 insertions, 0 deletions
diff --git a/control.py b/control.py
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index 0000000..075656b
--- /dev/null
+++ b/control.py
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+#!/bin/python
+
+import datetime
+import sys
+import time
+import threading
+import traceback
+import signal
+import logging
+
+# Custom scripts
+import hackchatcustom as hackchat
+import telegrambot
+
+# Config
+import config
+
+# Constants
+CONFIG_FILE     = "config.py"
+
+# Global variables holding both bots
+hcBot           = None
+tgBot           = None
+
+### General
+def log(s, suppress_console=True):
+    """Writes a message to the channel's logfile.
+    Will also output to the console if suppress_console is False."""
+    # Write to logfile
+    with open(config.LOG_FILENAME, "a") as f:
+        f.write("%s %s\n" % (datetime.datetime.now().isoformat(), s))
+    # Send via TG-Bot
+    if not suppress_console:
+        print(s)
+
+def mdescape(s):
+    """Hacky escapes for Telegrams Markdown parser.
+    Should really replace this with HTML."""
+    special = '*[`_'
+    for x in special:
+        s = s.replace(x, "\\" + x)
+    return s
+
+### HV-Bot
+def getUser(update):
+    """Convenience function that extracts a nick and tripcode (if any) from
+    an update object and returns the nickname in the following format:
+        If there is not tripcode: nick
+        If there is a tripcode: nick#tripcode"""
+    nick = update["nick"]
+    trip = 'null'
+    if "trip" in update:
+        trip = update["trip"]
+
+    if trip == 'null':
+        return nick
+    else:
+        return "%s#%s" % (nick, trip)
+
+def onMessage(chat, update):
+    """Callback function handling users submitting messages to the channel."""
+    message = update["text"]
+    nick = update["nick"]
+    trip = 'null'
+    if "trip" in update:
+        trip = update["trip"]
+    sender = getUser(update)
+
+    log("[%s] %s" % (sender, message))
+    if nick != config.USER:
+        if trip == 'null':
+            toTG("\\[*%s*] %s" % (mdescape(nick), mdescape(message)))
+        else:
+            toTG("\\[*%s*#%s] %s" % (mdescape(nick), trip, mdescape(message)))
+
+def onJoin(chat, update):
+    """Callback function handling users joining the channel."""
+    user = getUser(update)
+    log("# %s joined" % user)
+    toTG("# %s joined" % mdescape(user))
+
+def onLeave(chat, update):
+    """Callback function handling users leaving the channel."""
+    user = getUser(update)
+    log("# %s left" % user)
+    toTG("# %s left" % mdescape(user))
+
+def startHCBot():
+    """Starts the HC bot."""
+    global hcBot
+    bot = hackchat.HackChat(config.USER_AND_PASS, config.CHANNEL)
+    bot.on_message  += [onMessage]
+    bot.on_join     += [onJoin]
+    bot.on_leave    += [onLeave]
+    hcBot = bot
+    bot.run()
+
+def botCrashed(signum, frame):
+    """Recovery routine that restarts the HC bot upon crash.
+    This is run automatically when a SIGALRT is received
+    (tested on Linux only) and thus relies on the HC bot
+    catching any relevant exception and sending a SIGALRT."""
+    hcBot.stop()
+
+    log("=!= Bot crashed / lost connection. Retrying in %i seconds..."\
+            % config.RECONNECT_DELAY, suppress_console=False)
+    toTG("=!= Bot crashed / lost connection. Retrying in %i seconds..."\
+            % config.RECONNECT_DELAY)
+    time.sleep(config.RECONNECT_DELAY)
+    log("Reconnecting...", suppress_console=False)
+    toTG("Reconnecting...")
+    startHCBot()
+    log("Reconnected!", suppress_console=False)
+    toTG("Reconnected!")
+
+def kill():
+    """Debug command to test reconnect functionality"""
+    hcBot.ws.close()
+
+### TG-Bot Config
+def onTGMessage(text):
+    """Handles receiving messages from the Telegram bot.
+    Currently, they are simple forwarded to the HC bot
+    which will then send them"""
+    hcBot.send_message(text)
+
+def toTG(s):
+    """Handles sending messages to the Telegram bot.
+    Currently, the TG bot will simply send
+    the message with Markdown parsing enabled."""
+    tgBot.send(s)
+
+def startTGBot():
+    """Starts the Telegram bot and sets the global
+    tgBot variable."""
+    global tgBot
+    tgBot = telegrambot.TGBot()
+    tgBot.texthandlers += [onTGMessage]
+    tgBot.addCommand("active", cmdActive)
+    tgBot.addCommand("online", cmdOnline)
+    tgBot.run()
+
+def cmdActive(bot, update):
+    """TG command: /active
+    Checks wether the HC bot has been stopped.
+    This might not work correctly if the HC bot crashed."""
+    if not hcBot.stopped:
+        tgBot.send("+++ ACTIVE")
+    else:
+        tgBot.send("--- _not_ active")
+
+def cmdOnline(bot, update):
+    """TG command: /online
+    Returns the list of users that are in the HC channel.
+    Users are listed without their tripcode."""
+    users = list(hcBot.online_users)
+    users.sort()
+    tgBot.send("Users online:\n%s" %
+                mdescape(", ".join(users)))
+
+
+### Common
+def quit():
+    """Gracefully shuts down both bots"""
+    global should_quit
+    hcBot.stop()
+    tgBot.stop()
+    should_quit = True
+
+### Main
+if __name__ == "__main__":
+    logging.basicConfig(level=logging.DEBUG,
+                        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+
+    COMMANDS_CLI    = {
+        "kill": kill,
+        "quit": quit
+        #"online" : cmdOnline
+    }
+
+    should_quit = False
+
+    # Interpret SIGALRM as bot crash
+    signal.signal(signal.SIGALRM, botCrashed)
+
+    try:
+        startTGBot()
+        startHCBot()
+        while not should_quit:
+            cmd = input("> ")
+            if not cmd in COMMANDS_CLI:
+                print("Unknown command!")
+            else:
+                COMMANDS_CLI[cmd]()
+
+    except (KeyboardInterrupt, EOFError) as e:
+        print("Interrupt received. Shutting down...")
+        quit()
+
+    except:
+        print("====================")
+        print("Main thread crashed!")
+        print("====================")
+        print()
+        traceback.print_exc()
+
+