wantzel.py 17.9 KB
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#encoding: utf-8
"""
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Bot Wantzel from La Quadrature du Net.
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License : AGPLv3
Doc     : https://wiki.laquadrature.net/Wantzel

TODO:
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- Ajouter des commandes permettant de gérer le mediakit (moderators only)
    - Parser les urls et voir ce qu'on peut faire:
        - upload de vidéo
        - tag de vidéo
        - obtenir un lien vers une vidéo
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"""

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import feedparser
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import HTMLParser
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import importlib
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from irc import IrcClientFactory
import MySQLdb
import re
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import sqlite3
import time
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from twisted.internet import reactor
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from twitter import Twitter, OAuth
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import urllib

import config
from messages import messages

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LOG_FILE = "wantzel.log"
DEBUG = 3
WARNING = 2
INFO = 1
ERROR = 0
LOG_LEVEL = DEBUG

class Utils(object):
    @classmethod
    def log(cls, message):
        with open(LOG_FILE, 'a') as f:
            f.write("%s: %s\n" % (time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()), message))

    @classmethod
    def debug(cls, message):
        if LOG_LEVEL>=DEBUG:
            cls.log("%s: %s" % ("DEBUG", message))

    @classmethod
    def warning(cls, message):
        if LOG_LEVEL>=WARNING:
            cls.log("%s: %s" % ("WARNING", message))

    @classmethod
    def info(cls, message):
        if LOG_LEVEL>=INFO:
            cls.log("%s: %s" % ("INFO", message))

    @classmethod
    def error(cls, message):
        if LOG_LEVEL>=ERROR:
            cls.log("%s: %s" % ("ERROR", message))



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def get_cursor():
    """
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    This function connects to a MySQL database and returns a usable cursor.
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    """
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    connection = MySQLdb.connect(
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        host=config.dbserver,
        user=config.dbuser,
        passwd=config.dbpassword,
        db=config.dbname
    )
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    if connection:
        return connection.cursor()
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    return None

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def get_url(message):
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    """
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    Retrieve the url in the message.
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    """
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    # Let's get the url
    result = re.search("(https?[^ ]+)", message)
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    if not result:
        return "http"
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    url = result.group(1)
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    # Removing anchor if needed
    result = re.search("^([^#]*)", url)
    if result:
        url = result.group(1)
    # Removing trackers
    url = re.sub("[?&](utm_medium|utm_source|utm_campaign|xtor)=[^&]*", "", url)
    return url

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def get_title(message):
    title = ""
    website = ""
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    exceptions = [
        "twitter.com",
        "github.com",
    ]
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    try:
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        url = get_url(message)
        for exception in exceptions:
            if exception in url:
                return ("", "")
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        website = re.search("//([^/]*)", url).group(1)
        f = urllib.URLopener().open(url)
        content = f.read()
        title = re.search("<title>([^<]+)</title>", content).group(1)
    except:
        pass
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    # Unescaping HTML entities and removing multiple lines
    title = HTMLParser.HTMLParser().unescape(re.sub("\n|\r", "", title))
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    return (title, website)

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def is_moderator(name):
    """
    This function verify if a user is a moderator.
    """
    connection = sqlite3.connect(config.sqlite_db)
    cursor = connection.cursor()
    cursor.execute("SELECT count(*) FROM moderator WHERE name=?", (name, ))
    if int(cursor.fetchone()[0])==1:
        return True
    return False


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class Wantzel(object):
    """
    Wantzel bot.
    """
    def __init__(self):
        """
        Initialization of bot over IRC.
        """
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        self.number = 0
        # default last_entry_published
        self.last_entry_published = time.strptime("2000-01-01", "%Y-%m-%d")
        # See if there is something in the db
        connection = sqlite3.connect(config.sqlite_db)
        for row in connection.execute("SELECT last_entry_published FROM tweets"):
            self.last_entry_published = time.strptime(
                row[0].encode("utf-8"),
                "%Y-%m-%d %H:%M:%S %Z"
            )
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        self.irc = IrcClientFactory(config)
        self.irc.set_privmsg = self.set_privmsg
        reactor.connectTCP(config.server, config.port, self.irc)
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        # Prepare timer
        reactor.callLater(config.timer, self.timer)

    def timer(self):
        """
        This method launches function regularly (see config.timer).
        """
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        Utils.debug("Timer called")
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        self.rp_to_twitter("http://www.laquadrature.net/fr/revue-de-presse/feed")
        self.rp_to_twitter("http://www.laquadrature.net/en/press-review/feed")
        self.count_articles()
        # Recalling the timer
        reactor.callLater(config.timer, self.timer)
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    def set_privmsg(self):
        """
        This method set the methods to call for each callback received from IRC.
        """
        self.irc.client.privmsg = self.on_privmsg

    def send_message(self, channel, messages):
        """
        Sends a message on specified channel, cutting each line in a new message
        """
        for message in messages.splitlines():
            self.irc.client.msg(channel, message)

    def on_privmsg(self, user, channel, msg):
        """
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        Wantzel can understand a lot of commands. Commands followed by a (*)
        are accessible only to moderators:
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        - help
            Returns a message about how to use the bot.
            If a command is passed after help, the message explains how to use
            the command. 
        - rp(acp)
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            Add an article in the database
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        - stats
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            Show some statistics about the RP
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        - kill (*)
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            Kill an article by giving it a score of -100
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        - moderate list (*)
            List rights in private
        - moderate add (*)
            Add a new moderator to list
        - moderate remove (*)
            Remove a moderator from list
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        """
        # Cleaning user name
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        user = re.search("([^!]*)!", user).group(1)
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        Utils.debug("Message received: %s %s %s" % (user, channel, msg))
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        # Whatever is done, get the title of an existing url in a message
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        #title = ""
        #if "http" in msg:
        #    title, website = get_title(msg)
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        # Never answer to botself
        if user!=config.nickname:
            # If it's a query, bot should answer to the user as the channel
            if "#" not in channel:
                channel = user
            # Help command, specific
            if "wantzel" in msg and ("help" in msg or "aide" in msg):
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                self.help(user, channel, msg)
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            # Find known command
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            command = re.search("!(rp[acp]*|kill|help|stats|admin)", msg)
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            if command:
                command = command.group(1)
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                Utils.debug("Command: %s" % command)
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                if command.startswith("rp"):
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                    self.rp(command, user, channel, msg, title)
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                elif command=="help":
                    self.help(user, channel, msg)
                elif command=="kill":
                    self.kill(user, channel, msg)
                elif command=="stats":
                    self.stats(user, channel, msg)
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                elif command=="admin":
                    self.admin(user, channel, msg)
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        # No more giving the title of an url
        #if title and website:
        #    self.send_message(channel, messages["title"] % (title, website))
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    def help(self, user, channel, msg):
        """
        Show global help.
        If a known command is behind the !help command, an adequate message is
        returned.
        """
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        Utils.debug("help command")
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        # Searching for a command after help keyword
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        command = re.search("!help (stats|rp|help|kill|admin)", msg)
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        if command:
            command = command.group(1)
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            self.send_message(channel, messages["help_"+command])            
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        else:
            self.send_message(channel, messages["help"])
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    def rp(self, command, user, channel, msg, title=""):
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        """
        Adding the article in rp database.
        """
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        Utils.debug("rp command %s" % command)
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        cite = 0
        note = 0
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        url = get_url(msg)
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        Utils.debug("url: %s" % url)
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        if url=="":
            return
        elif url=="http":
            self.send_message(channel, messages["rp_http"] % user)
            return
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        # Looking for such an article in database
        cursor = get_cursor()
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        cursor.execute("SELECT id, note, provenance FROM presse WHERE url = %s", (url, ))
        rows = cursor.fetchall()
        if not rows:
            # LQdN is quoted
            if "c" in command:
                cite += 2
            # the article speak about LQdN
            if command.count("p")>1:
                cite += 2
            # Archive this article
            if "a" in command:
                note -= 2
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            Utils.debug("Adding an article by %s: %s" % (user, url))
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            result = cursor.execute(
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                """INSERT INTO presse SET 
                url=%s, provenance=%s, cite=%s, note=%s, datec=NOW(), title=%s,
                lang='', published=0, nid=0, screenshot=0, fetched=0, seemscite=0
                """,
                (url, user, cite, note, title)
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            )
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            self.send_message(channel, messages["rp_new_article"] % user)
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        else:
            if rows[0][2]!=user:
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                Utils.debug("Adding a point by %s on %s" % (user, rows[0][0]))
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                result = cursor.execute(
                    "UPDATE presse SET note=note+1 WHERE id=%s",
                    (rows[0][0], )
                )
            if (rows[0][1]+1)<3:
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                self.send_message(channel, messages["rp_known_article"] % user)
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            else:
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                self.send_message(channel, messages["rp_taken_article"] % user)
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                # Update number of articles to do
                self.count_articles()
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    def kill(self, user, channel, msg):
        """
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        Kill an article by setting its score to -100.
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        """
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        Utils.debug("kill command")
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        if is_moderator(user):
            url = get_url(msg)
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            Utils.debug("url: %s" % url)
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            if url=="":
                return
            elif url=="http":
                self.send_message(channel, messages["rp_http"] % user)
                return
            # Looking for such an article in database
            cursor = get_cursor()
            cursor.execute("SELECT id, note FROM presse WHERE url=%s", (url, ))
            rows = cursor.fetchall()
            if not rows:
                self.send_message(channel, messages["kill_none"] % url)
            else:
                cursor.execute("UPDATE presse SET note=-100 WHERE id=%s", (rows[0][0], ))
                self.send_message(channel, messages["kill_done"] % url)
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        else:
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            self.send_message(channel, messages["not_moderator"])
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    def stats(self, user, channel, msg):
        """
        Returns stats on articles in press review.
        """
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        Utils.debug("stats command")
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        cursor = get_cursor()
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        periods = [1, 3, 7, 15]
        notes = [0, 3 ,4]
        notnull = 0
        somethingatall = 0
        result = ""
        for note in notes:
            notnull = 0
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            result = result + "note>=%s: " % note
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            for period in periods:
                cursor.execute(
                    """SELECT COUNT(id) AS cid FROM presse 
                    WHERE nid=0
                    AND datec>(NOW()-INTERVAL %s DAY)
                    AND note>=%s""",
                    (period, note)
                )
                rows = cursor.fetchall()
                if rows[0][0]>0:
                    result = result + "%sj:%s, " % (period, rows[0][0])
                    notnull = 1
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                    somethingatall = 1
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            if notnull:
                result = result[:-2] + "\n"
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        if somethingatall==0:
            result = messages["stats_bravo"] % periods[-1]
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        self.send_message(channel, result)

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    def admin(self, user, channel, msg):
        """
        Manage moderation.
        A sub-command should be behind the !admin command.
        """
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        Utils.debug("admin command")
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        # Searching for a command after admin keyword
        command = re.search("!admin (list|add|del)", msg)
        if command:
            command = command.group(1)
            if command=="list":
                self.admin_list(user, channel, msg)
            elif command=="add":
                self.admin_add(user, channel, msg)
            elif command=="del":
                self.admin_del(user, channel, msg)

    def admin_list(self, user, channel, msg):
        """
        List actual moderators.
        """
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        Utils.debug("admin_list command")
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        if is_moderator(user):
            connection = sqlite3.connect(config.sqlite_db)
            names = []
            for row in connection.execute("SELECT name FROM moderator"):
                names.append(row[0].encode("utf-8"))
            self.send_message(channel, messages["admin_list"] % ", ".join(names))
        else:
            self.send_message(channel, messages["not_moderator"])

    def admin_add(self, user, channel, msg):
        """
        Add some new moderators if not existing yet.
        """
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        Utils.debug("admin_add command")
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        if is_moderator(user):
            try:
                names = []
                connection = sqlite3.connect(config.sqlite_db)
                result = re.search("!admin add (([^,]+, ?)+)?(.*)", msg)
                if result.group(1):
                    names = [name for name in result.group(1).split(", ") if name!=""]
                names.append(result.group(3))
                # Do not add actual moderators
                moderators = []
                for row in connection.execute("SELECT name FROM moderator"):
                    moderators.append(row[0].encode("utf-8"))
                names = set([name for name in names if name not in moderators])
                if names:
                    # Converting set in list of tuples
                    values = [(name,) for name in names]
                    connection.executemany("INSERT INTO moderator (name) VALUES (?)", values)
                    connection.commit()
                    self.send_message(channel, messages["admin_add"] % ", ".join(names))
                else:
                    self.send_message(channel, messages["admin_add_empty"])
            except:
                pass
        else:
            self.send_message(channel, messages["not_moderator"])

    def admin_del(self, user, channel, msg):
        """
        Delete a moderator from list.
        """
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        Utils.debug("admin_del command")
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        if is_moderator(user):
            try:
                names = []
                result = re.search("!admin del (([^,]+, ?)+)?(.*)", msg)
                if result.group(1):
                    names = [name for name in result.group(1).split(", ") if name!=""]
                names.append(result.group(3))
                names = set(names)
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                Utils.debug(names)
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                connection = sqlite3.connect(config.sqlite_db)
                for name in names:
                    connection.execute("DELETE FROM moderator WHERE name=?", (name, ))
                connection.commit()
                self.send_message(channel, messages["admin_del"] % ", ".join(names))
            except:
                pass
        else:
            self.send_message(channel, messages["not_moderator"])

    def count_articles(self):
        """
        Count number of articles not done in RP and updates the topic of the
        press review channel if needed.
        """
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        Utils.debug("count_articles method")
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        cursor = get_cursor()
        cursor.execute("""SELECT COUNT(*) FROM presse
            WHERE DATE_SUB(NOW(), INTERVAL 2 MONTH)<datec
            AND note > 2
            AND nid = 0""")
        rows = cursor.fetchall()
        number = int(rows[0][0])
        if self.number!=number:
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            self.irc.client.topic("#lqdn-rp", messages["topic"] % number)
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            pass
        self.number = number

    def rp_to_twitter(self, rss):
        """
        By parsing the RSS feed of the press-review, we know what to tweet.
        """
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        Utils.debug("rp_to_twitter method")
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        now = time.localtime()
        today = time.strptime("%s-%s-%s %s" % (
                now.tm_year,
                now.tm_mon,
                now.tm_mday,
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                time.tzname[0]
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            ),
            "%Y-%m-%d %Z"
        )
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        language = "fr"
        if "/en/" in rss:
            language = "en"
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        entries = feedparser.parse(rss)['entries']
        entries.reverse()
        for entry in entries:
            # if date of publication is greater than today, midnight, and
            # lesser than future
            if today < entry.published_parsed < now:
                if self.last_entry_published < entry.published_parsed:
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                    self.tweet(messages["tweet_rp_%s" % language] % (
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                        entry.title.encode("utf-8"),
                        entry.link.encode("utf-8")
                    ))
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                    Utils.debug(entry.published_parsed)
                    Utils.debug(entry.title)
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                    # Save last_entry_published
                    self.last_entry_published = entry.published_parsed
                    last_entry_published = time.strftime(
                        "%Y-%m-%d %H:%M:%S %Z",
                        self.last_entry_published
                    )
                    connection = sqlite3.connect(config.sqlite_db)
                    connection.execute(
                        "UPDATE tweets SET last_entry_published=?",
                        (last_entry_published,)
                    )
                    connection.commit()
                    # Tweet only one message in order not to spam
                    return

    def tweet(self, message):
        """
        Tweet message on specified account
        """
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        Utils.debug("tweet method")
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        auth = OAuth(
            config.TOKEN,
            config.TOKENSEC,
            config.CONSKEY,
            config.CONSSEC
        )
        twitter = Twitter(auth=auth)
        try:
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            Utils.debug("Tweeting: %s" % message)
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            twitter.statuses.update(status=message)
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        except:
            pass

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if __name__ == '__main__':
    wantzel = Wantzel()
    reactor.run()