Edm0nd/edmond/plugins/youtube_parser.py

import re

try:
    from googleapiclient.errors import Error as GoogleApiError

    DEPENDENCIES_FOUND = True
except ImportError:
    DEPENDENCIES_FOUND = False

from edmond.plugin import Plugin


class YoutubeParserPlugin(Plugin):

    VIDEO_URL_RE = re.compile(
        r"https?:\/\/(?:[^/]+/watch\?(?:.*&)?v=(?P<code1>[^&\s]+)"
        r"|youtu\.be/(?P<code2>[^&\s]+))"
    )

    def __init__(self, bot):
        super().__init__(bot)
        self.priority = -3
        self._youtube_plugin = None

    @property
    def youtube_plugin(self):
        if self._youtube_plugin is None:
            self._youtube_plugin = self.bot.get_plugin("youtube")
        return self._youtube_plugin

    def on_welcome(self, _):
        if not (self.youtube_plugin and self.youtube_plugin.is_ready):
            self.bot.log_w("Youtube plugin is not available.")
            self.is_ready = False

    def on_pubmsg(self, event):
        if not self.respects_handling_conditions():
            return False
        words = event.arguments[0].split()
        for word in words:
            matched = self.VIDEO_URL_RE.match(word)
            if matched:
                return self.handle_match(matched, event.target)
        return False

    def handle_match(self, matched, target):
        groupdict = matched.groupdict()
        code = groupdict.get("code1") or groupdict.get("code2")
        if not code:
            return False
        try:
            search_response = (
                self.youtube_plugin.youtube.videos()
                .list(id=code, part="snippet")
                .execute()
            )
        except GoogleApiError:
            self.signal_failure(target)
            return False
        title = ""
        for result in search_response.get("items", []):
            if result["kind"] == "youtube#video":
                title = result["snippet"]["title"]
                break
        else:
            self.signal_failure(target)
            return False
        self.bot.say(target, title)
        return True