Merge pull request #44 from strNophix/lastfm-scrobbler

Plugins + lastfm scrobbler

bot.py

@@ -22,51 +22,74 @@ from discord.ext.commands.errors import ExtensionNotFound
 from discord.ext.commands.errors import NoEntryPointError
 
 from context import CustomContext
+from tunebot.plugins import FileSystemPluginLoader
+from tunebot.plugins import SimplePluginManager
 from tunebot.redis import GlobalRedisAutoJoin
 from tunebot.redis import GlobalRedisPlaylist
 from tunebot.redis import GlobalRedisPlaylistSource
+from tunebot.redis import GlobalRedisUtils
 
 if TYPE_CHECKING:
+    from tunebot import PluginManagerBase
     from tunebot import GlobalPlaylist
     from tunebot import GlobalPlaylistSource
     from tunebot import GlobalAutoJoin
+    from tunebot import PluginLoaderBase
+    from tunebot import PluginManagerBase
+    from tunebot import GlobalUtils
+
+ColorDict = dict[str, "Color"]
 
 
 class TuneBot(commands.Bot):
     lavalink: lavalink.Client
-    invite_link: str
+    invite_link: str = ""
+    initial_cog_names: list[str]
+    colors: ColorDict
+
+    global_autojoin: "GlobalAutoJoin"
+    global_playlist: "GlobalPlaylist"
+    global_playlist_source: "GlobalPlaylistSource"
+    global_utils: "GlobalUtils"
+
+    plugin_loader: "PluginLoaderBase"
+    plugin_manager: "PluginManagerBase"
 
     def __init__(self, config: Dict[Any, Any]):
         intents = discord.Intents(
-            voice_states=True, guild_messages=True, guilds=True, messages=True
+            voice_states=True,
+            guild_messages=True,
+            guilds=True,
+            messages=True,
+            members=True,
         )
 
         self.rpc_is_help_message = True
         self.update_status.start()
 
         self.config = config
-        self.initial_cog_names: List[str] = self.config.get("cogs", [])
-        self.colors: Dict[str, Color] = self.process_colours(config.get("colors", []))
+
+        self.initial_cog_names = self.config.get("cogs", [])
+        self.colors = self.process_colours(config.get("colors", []))
 
         self.redis_prefix = self.config["redis_prefix"]
         self._redis_client: Redis = aioredis.from_url(
             self.config["redis_url"], encoding="utf-8", decode_responses=True
         )
 
-        self.global_autojoin: GlobalAutoJoin = GlobalRedisAutoJoin(
-            self._redis_client,
-            self.redis_prefix,
+        self.global_autojoin = GlobalRedisAutoJoin(
+            self._redis_client, self.redis_prefix
         )
-        self.global_playlist: GlobalPlaylist = GlobalRedisPlaylist(
-            self._redis_client,
-            self.redis_prefix,
+        self.global_playlist = GlobalRedisPlaylist(
+            self._redis_client, self.redis_prefix
         )
-        self.global_playlist_source: GlobalPlaylistSource = GlobalRedisPlaylistSource(
-            self._redis_client,
-            self.redis_prefix,
+        self.global_playlist_source = GlobalRedisPlaylistSource(
+            self._redis_client, self.redis_prefix
         )
+        self.global_utils = GlobalRedisUtils(self._redis_client, self.redis_prefix)
 
-        self.invite_link: str = ""
+        self.plugin_loader = FileSystemPluginLoader(self)
+        self.plugin_manager = SimplePluginManager(self)
 
         slash_guilds = None
         if len(self.config["slash_command_guilds"]) > 0:
@@ -86,23 +109,24 @@ class TuneBot(commands.Bot):
         self.loop.create_task(self.async_init())
 
     async def async_init(self):
-        await self.load_cogs(self.initial_cog_names)
+        self.init_plugins()
+        self.load_cogs(self.initial_cog_names)
 
     async def prefix_callable(self, _, msg: Message) -> List[str]:
         return commands.when_mentioned_or(*self.config["prefixes"])(self, msg)
 
-    async def load_cogs(self, cog_names: Sequence[str]):
+    def load_cogs(self, cog_names: Sequence[str]):
         for cog in cog_names:
             try:
                 self.load_extension(cog)
-                print(f"Succesfully loaded extension {cog}.")
+                print(f"[✓] loaded extension: {cog}.")
             except (
                 ExtensionNotFound,
                 ExtensionAlreadyLoaded,
                 NoEntryPointError,
                 ExtensionFailed,
             ) as e:
-                print(f"Failed to load extension {cog}.\n\t{e}", file=sys.stderr)
+                print(f"[x] failed loading extension: {cog}.\n\t{e}", file=sys.stderr)
 
     async def on_ready(self):
         self.invite_link = f"https://discord.com/oauth2/authorize?client_id={self.user.id}&permissions=3230720&scope=bot%20applications.commands"
@@ -117,7 +141,7 @@ class TuneBot(commands.Bot):
             ll["host"], ll["port"], ll["password"], ll["region"], ll["name"]
         )
 
-    def process_colours(self, colors: Dict[str, str]) -> Dict[str, Color]:
+    def process_colours(self, colors: Dict[str, str]) -> ColorDict:
         colour_dict: Dict[str, Color] = {}
         for name, color in colors.items():
             colour_dict[name] = Color(int(color, 16))
@@ -126,6 +150,19 @@ class TuneBot(commands.Bot):
     async def get_context(self, message: Message, *, cls=CustomContext):
         return await super().get_context(message, cls=cls)
 
+    def init_plugins(self):
+        for plug_id, plug_conf in self.config["plugins"].items():
+            if not plug_conf.get("enabled"):
+                continue
+
+            try:
+                plugin = self.plugin_loader.load_plugin(plug_conf)
+                self.plugin_manager.enable_plugin(plug_id, plugin)
+                print(f"[✓] loaded plugin: {plug_id}")
+            except Exception as e:
+                self.plugin_manager.remove_plugin(plug_id)
+                print(f"[x] failed loading plugin: {plug_id}\n{e}")
+
     @tasks.loop(seconds=30)
     async def update_status(self):
         await self.wait_until_ready()
@@ -141,13 +178,6 @@ class TuneBot(commands.Bot):
         await self.change_presence(activity=activity)
 
 
-config_path = "config.json"
-if len(sys.argv) > 1:
-    config_path = sys.argv[1]
-
-config = json.load(open(config_path, "r", encoding="utf-8"))
-redis_prefix = config["redis_prefix"]
-
 if __name__ == "__main__":
     try:
         import uvloop
@@ -157,5 +187,10 @@ if __name__ == "__main__":
     except ModuleNotFoundError:
         pass
 
+    config_path = "config.json"
+    if len(sys.argv) > 1:
+        config_path = sys.argv[1]
+
+    config = json.load(open(config_path, "r", encoding="utf-8"))
     token = config.pop("token")
     TuneBot(config).run(token, reconnect=True)

cogs/music.py

@@ -1,24 +1,29 @@
 import asyncio
 import datetime
 import re
+from typing import Any
 from typing import Optional
+from typing import TYPE_CHECKING
 
 import discord
 import lavalink
 from discord import Embed
 from discord.channel import TextChannel
 from discord.ext import commands
-from discord.ext.commands.context import Context
 from discord.ext.commands.errors import CommandError
 from lavalink.models import AudioTrack
 from lavalink.models import DefaultPlayer
 
 from bot import TuneBot
 from context import CustomContext
+from tunebot.plugins import ServiceEvent
 from utils.classes import BaseCog
 from utils.EmbedGenerator import EmbedGenerator
 from utils.exceptions import EmbeddedCommandException
 
+if TYPE_CHECKING:
+    from discord import VoiceChannel
+
 url_rx = re.compile(r"https?://(?:www\.)?.+")
 
 
@@ -217,13 +222,36 @@ class Music(BaseCog):
             guild = self.bot.get_guild(guild_id)
             await guild.voice_client.disconnect(force=True)
         elif isinstance(event, lavalink.events.TrackStartEvent):
-            channel_id = int(event.player.fetch("channel"))
+            if channel := event.player.fetch("channel"):
+                channel_id = int(channel)
                 channel: TextChannel = self.bot.get_channel(channel_id)
                 embed = await self.create_track_embed(event.player.current)
                 await channel.send(embed=embed)
         elif isinstance(event, lavalink.events.TrackEndEvent):
             await self.fill_player_queue(event.player, 1)
 
+            if event.reason == "FINISHED":
+                if event.player.channel_id:
+                    channel_id = int(event.player.channel_id)
+                    voice_channel: "VoiceChannel" = self.bot.get_channel(channel_id)
+                    in_voice: list[int] = []
+
+                    for member in voice_channel.members:
+                        if member.bot:
+                            continue
+
+                        in_voice.append(member.id)
+
+                    payload: dict[str, Any] = {
+                        "last_track": event.track,
+                        "in_voice": in_voice,
+                    }
+                    s = ServiceEvent.TRACK_ENDED
+                    await self.bot.plugin_manager.dispatch(s, payload)
+                else:
+                    fmt = f"Failed dispatching for TrackEnd event, missing channel_id on player"
+                    print(fmt)
+
     @commands.command(name="connect", aliases=["p", "play", "join"])
     async def play(self, ctx: CustomContext):
         """Start the radio"""

config.json.sample

@@ -22,5 +22,18 @@
     "cogs": ["cogs.owner", "cogs.settings", "cogs.information", "cogs.music"],
     "slash_command_guilds": [],
     "queue_buffer_size": 5,
-    "slash_descriptions": {}
+    "slash_descriptions": {},
+    "plugins": {
+        "lastfm-scrobbler": {
+            "services": ["plugins.lastfm_scrobbler.service"],
+            "cogs": ["plugins.lastfm_scrobbler.cog"],
+            "config": {
+                "lastfm_api_key": "",
+                "lastfm_api_secret": "",
+                "session_key_table": "",
+                "auth_url": ""
+            },
+            "enabled": false
+        }
+    }
 }

context.py

@@ -1,3 +1,4 @@
+from typing import Any
 from typing import TYPE_CHECKING
 
 from aioredis.client import Redis
@@ -14,12 +15,18 @@ if TYPE_CHECKING:
     from tunebot import PlaylistSource
     from tunebot import AutoJoin
     from utils.classes import BaseCog
+    from tunebot.plugins import ServiceEvent
+
+AnyDict = dict[Any, Any]
 
 
 class CustomContext(commands.Context):
     bot: "TuneBot"
     cog: "BaseCog"
 
+    async def dispatch(self, event: "ServiceEvent", payload: AnyDict):
+        await self.bot.plugin_manager.dispatch(event, payload)
+
     @property
     def redis(self) -> Redis:
         return self.bot._redis_client

plugins/lastfm_scrobbler/cog.py

@@ -0,0 +1,46 @@
+from typing import TYPE_CHECKING
+
+from discord.ext import commands
+
+from context import CustomContext
+from utils.classes import PluginCog
+
+if TYPE_CHECKING:
+    from bot import TuneBot
+
+
+class LastFMScrobblerCog(PluginCog, name="LastFMScrobbler"):
+    def __init__(self, bot: "TuneBot") -> None:
+        super().__init__(bot)
+        self.plugin = self.get_plugin_instance("lastfm-scrobbler")
+
+    @commands.group(name="lfm", invoke_without_command=True)
+    @commands.cooldown(rate=1, per=5, type=commands.BucketType.user)
+    async def lfm(self, ctx: CustomContext):
+        """Enable/Disable LastFM Scrobbling"""
+        embed = ctx.create_embed()
+        embed.title = f"LastFM scrobbler usage:"
+        embed.description = f"```{ctx.prefix}lfm enable\n{ctx.prefix}lfm del```"
+        await ctx.send(embed=embed)
+
+    @lfm.command(name="enable", aliases=["set"])
+    async def lfm_aut(self, ctx: CustomContext):
+        """Enable LastFM Scrobbling"""
+        embed = ctx.create_embed()
+        embed.title = f"Start scrobbling"
+        auth_url = self.plugin.config["auth_url"] + "?user_id=" + str(ctx.author.id)
+        embed.description = f"[Login]({auth_url})"
+        await ctx.send(embed=embed)
+
+    @lfm.command(name="delete", aliases=["del"])
+    async def lfm_del(self, ctx: CustomContext):
+        """Disable LastFM Scrobbling"""
+        db_key = self.plugin.config["session_key_table"]
+        await self.bot.global_utils.raw_table_del_entry(db_key, [ctx.author.id])
+        embed = ctx.create_embed()
+        embed.title = f"Stopped scrobbling"
+        await ctx.send(embed=embed)
+
+
+def setup(bot: "TuneBot"):
+    bot.add_cog(LastFMScrobblerCog(bot))

plugins/lastfm_scrobbler/service.py

@@ -0,0 +1,84 @@
+import hashlib
+import time
+from dataclasses import dataclass
+from typing import Any
+from typing import TYPE_CHECKING
+
+import aiohttp
+from lavalink.models import AudioTrack
+
+from tunebot.plugins import ServiceEvent
+
+if TYPE_CHECKING:
+    from bot import TuneBot
+
+AnyDict = dict[Any, Any]
+
+
+@dataclass
+class Track:
+    name: str
+    artist: str
+
+
+class LastFMScrobbler:
+    api_url = "http://ws.audioscrobbler.com/2.0/"
+
+    def __init__(self, bot: "TuneBot", config: AnyDict) -> None:
+        self.bot = bot
+        self.plug_conf = config
+
+    async def on_dispatch(self, event: "ServiceEvent", payload: AnyDict):
+        if event == ServiceEvent.TRACK_ENDED:
+            _track: AudioTrack = payload.get("last_track", None)
+            if not _track:
+                print("LastFMScrobbler: Could not find required field `last_track`")
+                return
+
+            # TODO: expand parsing options
+            artist, track_name = _track.title.split(" - ", 1)
+            track = Track(track_name, artist)
+
+            in_voice = payload.get("in_voice", [])
+            for session_key in await self.fetch_lastfm_sessions(in_voice):
+                if not session_key:
+                    continue
+
+                await self.scrobble(session_key, track)
+
+    async def fetch_lastfm_sessions(self, user_ids: list[int]) -> list[str]:
+        table_name = self.plug_conf["config"]["session_key_table"]
+        result: list[str] = await self.bot.global_utils.raw_table_lookup(
+            table_name, user_ids
+        )
+        return result
+
+    async def scrobble(self, session_key: str, track: Track):
+        params: AnyDict = {
+            "method": "track.scrobble",
+            "timestamp": str(int(time.time() - 30)),
+            "track": track.name,
+            "artist": track.artist,
+            "sk": session_key,
+        }
+        resp = await self.lastfm_request(params)
+        if resp.status != 200:
+            fmt = f"Failed to scrobble for user {session_key} on track: {track.artist} - {track.name}"
+            print(fmt)
+
+    async def lastfm_request(self, params: AnyDict) -> aiohttp.ClientResponse:
+        params["api_key"] = self.plug_conf["config"]["lastfm_api_key"]
+        params = {key: params[key] for key in sorted(params)}
+
+        secret = self.plug_conf["config"]["lastfm_api_secret"]
+        sig_str = "".join(key + params[key] for key in params.keys()) + secret
+        params["api_sig"] = hashlib.md5(sig_str.encode("utf8")).hexdigest()
+
+        params["format"] = "json"
+        async with aiohttp.ClientSession() as sess:
+            async with sess.post(self.api_url, params=params) as resp:
+                return resp
+
+
+def setup(bot: "TuneBot", config: AnyDict):
+    return LastFMScrobbler(bot, config)

tunebot/abc.py

@@ -1,6 +1,16 @@
 from abc import ABC
 from abc import abstractmethod
+from typing import Any
 from typing import Optional
+from typing import Protocol
+from typing import TYPE_CHECKING
+from typing import Union
+
+if TYPE_CHECKING:
+    from tunebot.plugins import ServiceEvent
+    from discord.ext.commands import Cog
+
+AnyDict = dict[Any, Any]
 
 
 class GlobalPlaylistSource(ABC):
@@ -53,10 +63,53 @@ class AutoJoin(ABC):
         pass
 
 
+class ServiceBase(Protocol):
+    async def on_dispatch(self, event: "ServiceEvent", payload: AnyDict):
+        ...
+
+
+class PluginManagerBase(Protocol):
+    def get_plugin(self, name: str) -> Union["BasePluginInstance", None]:
+        ...
+
+    def remove_plugin(self, name: str):
+        ...
+
+    def enable_plugin(self, name: str, plugin: "BasePluginInstance"):
+        ...
+
+    async def dispatch(self, event: "ServiceEvent", payload: AnyDict = {}):
+        ...
+
+
+class PluginLoaderBase(Protocol):
+    def load_plugin(self, plug_conf: AnyDict) -> "BasePluginInstance":
+        ...
+
+
+class GlobalUtils(Protocol):
+    async def raw_table_lookup(self, table_name: str, keys: list[Any]) -> list[Any]:
+        ...
+
+    async def raw_table_del_entry(self, table_name: str, keys: list[Any]):
+        ...
+
+
+class BasePluginInstance(Protocol):
+    config: AnyDict
+    services: list["ServiceBase"]
+    cogs: list[str]
+
+
 __all__ = (
     "GlobalPlaylistSource",
     "PlaylistSource",
     "GlobalPlaylist",
     "GlobalAutoJoin",
     "AutoJoin",
+    "ServiceBase",
+    "PluginManagerBase",
+    "PluginLoaderBase",
+    "GlobalUtils",
+    "BasePluginInstance",
 )

tunebot/plugins/__init__.py

@@ -0,0 +1,6 @@
+# noreorder
+from tunebot.plugins.exceptions import *
+from tunebot.plugins.events import *
+from tunebot.plugins.plugin import *
+from tunebot.plugins.loader import *
+from tunebot.plugins.manager import *

tunebot/plugins/events.py

@@ -0,0 +1,16 @@
+from enum import auto
+from enum import Enum
+
+
+class ServiceEvent(Enum):
+    """
+    This Enum contains all possible events that can be dispatched to services
+
+    Args:
+        Enum ([type]): [description]
+    """
+
+    TRACK_ENDED = auto()
+
+
+__all__ = ("ServiceEvent",)

tunebot/plugins/exceptions.py

@@ -0,0 +1,5 @@
+class PluginInitFailed(Exception):
+    pass
+
+
+__all__ = ("PluginInitFailed",)

tunebot/plugins/loader.py

@@ -0,0 +1,42 @@
+import importlib
+from typing import Any
+from typing import TYPE_CHECKING
+
+from tunebot.plugins import PluginInstance
+from tunebot.plugins.exceptions import PluginInitFailed
+
+if TYPE_CHECKING:
+    from tunebot import BasePluginInstance
+    from tunebot import ServiceBase
+    from bot import TuneBot
+
+AnyDict = dict[Any, Any]
+
+
+class FileSystemPluginLoader:
+    def __init__(self, bot: "TuneBot") -> None:
+        self.bot = bot
+
+    def load_plugin(self, plug_conf: AnyDict) -> "BasePluginInstance":
+        """
+        Loads a plugin from configuration and returns a sequence of Services
+
+        Raises:
+            PluginInitFailed: [description]
+
+        Returns:
+            tuple[list["ServiceBase"], list[str]]: [description]
+        """
+        services: list["ServiceBase"] = []
+        for service_location in plug_conf["services"]:
+            module = importlib.import_module(service_location)
+
+            if not hasattr(module, "setup"):
+                raise PluginInitFailed('Failed to find setup() for "{location}"')
+
+            services.append(module.setup(self.bot, plug_conf))
+
+        return PluginInstance(plug_conf["config"], services, plug_conf["cogs"])
+
+
+__all__ = ("FileSystemPluginLoader",)

tunebot/plugins/manager.py

@@ -0,0 +1,79 @@
+from typing import Any
+from typing import TYPE_CHECKING
+from typing import Union
+
+from discord.ext.commands.errors import ExtensionAlreadyLoaded
+from discord.ext.commands.errors import ExtensionFailed
+from discord.ext.commands.errors import ExtensionNotFound
+from discord.ext.commands.errors import NoEntryPointError
+
+if TYPE_CHECKING:
+    from tunebot.abc import BasePluginInstance
+    from tunebot.plugins import ServiceEvent
+    from bot import TuneBot
+
+AnyDict = dict[Any, Any]
+
+
+class SimplePluginManager:
+    _plugins: dict[str, "BasePluginInstance"] = {}
+
+    def __init__(self, bot: "TuneBot") -> None:
+        self.bot = bot
+
+    def get_plugin(self, name: str) -> Union["BasePluginInstance", None]:
+        """
+        Retrieves the corresponding `BasePluginInstance` if it exists
+
+        Returns:
+            Union["BasePluginInstance", None]: [description]
+        """
+        return self._plugins.get(name)
+
+    def remove_plugin(self, name: str):
+        """
+        Unloads/Removes all components related to the `BasePluginInstance`
+
+        Args:
+            name (str): [description]
+        """
+        plugin = self.get_plugin(name)
+
+        if not plugin:
+            return
+
+        for cog in plugin.cogs:
+            try:
+                self.bot.unload_extension(cog)
+            except Exception:
+                pass
+
+        del self._plugins[name]
+
+    def enable_plugin(self, name: str, plugin: "BasePluginInstance"):
+        """
+        Loads/Activates all cogs/services included within the plugin
+
+        Args:
+            plugin_name (str): [description]
+            services (list[): [description]
+            cog_names (list[str]): [description]
+        """
+        self._plugins[name] = plugin
+        for cog_name in plugin.cogs:
+            self.bot.load_extension(cog_name)
+
+    async def dispatch(self, event: "ServiceEvent", payload: AnyDict = {}):
+        """
+        Dispatches an event to all registered services
+
+        Args:
+            event (ServiceEvent): [description]
+            payload (AnyDict, optional): [description]. Defaults to {}.
+        """
+        for plugin in self._plugins.values():
+            for service in plugin.services:
+                await service.on_dispatch(event, payload)
+
+
+__all__ = ("SimplePluginManager",)

tunebot/plugins/plugin.py

@@ -0,0 +1,18 @@
+from dataclasses import dataclass
+from typing import Any
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from tunebot import ServiceBase
+
+AnyDict = dict[Any, Any]
+
+
+@dataclass
+class PluginInstance:
+    config: AnyDict
+    services: list["ServiceBase"]
+    cogs: list[str]
+
+
+__all__ = ("PluginInstance",)

tunebot/redis/__init__.py

@@ -1,4 +1,6 @@
-from tunebot.redis.entity import *  # noreorder
+# noreorder
+from tunebot.redis.entity import *
+from tunebot.redis.utils import *
 from tunebot.redis.autojoin import *
 from tunebot.redis.playlist import *
 from tunebot.redis.playlist_source import *

tunebot/redis/utils.py

@@ -0,0 +1,18 @@
+from typing import Any
+
+from tunebot.redis import RedisBotEntity
+
+
+class GlobalRedisUtils(RedisBotEntity):
+    async def raw_table_lookup(self, table_name: str, keys: list[Any]) -> list[Any]:
+        if len(keys) == 0:
+            return []
+
+        result: list[Any] = await self.redis.hmget(table_name, keys)
+        return result
+
+    async def raw_table_del_entry(self, table_name: str, keys: list[Any]):
+        if len(keys) == 0:
+            return
+
+        await self.redis.hdel(table_name, *keys)

utils/classes.py

@@ -1,13 +1,15 @@
-import asyncio
 from typing import Dict
+from typing import TYPE_CHECKING
 
 from discord.ext.commands import Cog
 
-from bot import TuneBot
+if TYPE_CHECKING:
+    from tunebot import BasePluginInstance
+    from bot import TuneBot
 
 
 class BaseCog(Cog):
-    def __init__(self, bot: TuneBot) -> None:
+    def __init__(self, bot: "TuneBot") -> None:
         self.bot = bot
 
         slash_descriptions: Dict[str, str] = self.bot.config["slash_descriptions"]
@@ -20,3 +22,11 @@ class BaseCog(Cog):
             hasattr(self.bot, "lavalink")
             and len(self.bot.lavalink.node_manager.available_nodes) > 0
         )
+
+
+class PluginCog(BaseCog):
+    def get_plugin_instance(self, name: str) -> "BasePluginInstance":
+        if plugin := self.bot.plugin_manager.get_plugin(name):
+            return plugin
+
+        raise KeyError(f"Failed to retrieve plugin instance with name: {name}")