Merge pull request #7 from jarulsamy/dev

v0.0.6

PlexBot/__init__.py

@@ -1,3 +1,9 @@
+"""Plex music bot for discord.
+
+    Do not import this module, it is intended to be
+    used exclusively within a docker environment.
+
+"""
 import logging
 import sys
 from pathlib import Path
@@ -14,13 +20,25 @@ bot_log = logging.getLogger("Bot")
 
 
 def load_config(filename: str) -> Dict[str, str]:
+    """Loads config from yaml file
 
+    Grabs key/value config pairs from a file.
+
+    Args:
+        filename: str path to yaml file.
+
+    Returns:
+        Dict[str, str] Values from config file.
+
+    Raises:
+        FileNotFound Configuration file not found.
+    """
     # All config files should be in /config
     # for docker deployment.
     filename = Path("/config", filename)
     try:
-        with open(filename, "r") as f:
+        with open(filename, "r") as config_file:
-            config = yaml.safe_load(f)
+            config = yaml.safe_load(config_file)
     except FileNotFoundError:
         root_log.fatal("Configuration file not found.")
         sys.exit(-1)

PlexBot/__main__.py

@@ -1,11 +1,15 @@
+"""Main entrypoint for bot
+
+    Sets up loggers and initiates bot.
+
+"""
 import logging
 
 from discord.ext.commands import Bot
 
-from . import FORMAT
+from . import load_config
 from .bot import General
 from .bot import Plex
-from PlexBot import load_config
 
 # Load config from file
 config = load_config("config.yaml")

PlexBot/__version__.py

@@ -1 +1,2 @@
-VERSION = "0.0.5"
+"""Track version number of package"""
+VERSION = "0.0.6"

PlexBot/bot.py

@@ -1,3 +1,4 @@
+""" All discord bot and Plex api interactions"""
 import asyncio
 import io
 import logging
@@ -18,19 +19,59 @@ bot_log = logging.getLogger("Bot")
 
 
 class General(commands.Cog):
+    """General commands
+
+    Manage general bot behavior
+    """
+
     def __init__(self, bot):
+        """Initialize commands
+
+        Args:
+            bot: discord.ext.command.Bot, bind for cogs
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         self.bot = bot
 
     @command()
     async def kill(self, ctx, *args):
+        """Kill the bot
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+            *args: optional flags
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         if "silent" not in args:
             await ctx.send(f"Stopping upon the request of {ctx.author.mention}")
 
         await self.bot.close()
-        bot_log.info(f"Stopping upon the request of {ctx.author.mention}")
+        bot_log.info("Stopping upon the request of %s", ctx.author.mention)
 
     @command()
     async def cleanup(self, ctx, limit=250):
+        """Delete old messages from bot
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+            limit: int number of messages to go back by to delete. Default 250
+
+        Raises:
+            None
+
+        Returns:
+            None
+        """
         channel = ctx.message.channel
 
         try:
@@ -43,17 +84,51 @@ class General(commands.Cog):
                         pass
 
         except discord.Forbidden:
+            bot_log.info("Unable to delete messages, insufficient permissions.")
             await ctx.send("I don't have the necessary permissions to delete messages.")
 
 
 class Plex(commands.Cog):
-    def __init__(self, bot, base_url, plex_token, lib_name, bot_prefix) -> None:
+    """Discord commands pertinent to interacting with Plex
+
+        Contains user commands such as play, pause, resume, stop, etc.
+        Grabs, and parses all data from plex database.
+
+    """
+
+    # pylint: disable=too-many-instance-attributes
+    # All are necessary to detect global interactions
+    # within the bot.
+
+    def __init__(
+        self, bot, base_url: str, plex_token: str, lib_name: str, bot_prefix: str
+    ):
+        """Initializes Plex resources
+
+        Connects to Plex library and sets up
+        all asyncronous communications.
+
+        Args:
+            bot: discord.ext.command.Bot, bind for cogs
+            base_url: str url to Plex server
+            plex_token: str X-Token of Plex server
+            lib_name: str name of Plex library to search through
+            bot_prefix: str prefix used to interact with bots
+
+        Raises:
+            plexapi.exceptions.Unauthorized: Invalid Plex token
+
+        Returns:
+            None
+        """
+
         self.bot = bot
         self.base_url = base_url
         self.plex_token = plex_token
         self.library_name = lib_name
         self.bot_prefix = bot_prefix
 
+        # Log fatal invalid plex token
         try:
             self.pms = PlexServer(self.base_url, self.plex_token)
         except Unauthorized:
@@ -61,57 +136,103 @@ class Plex(commands.Cog):
             raise Unauthorized("Invalid Plex token")
 
         self.music = self.pms.library.section(self.library_name)
-        plex_log.debug(f"Connected to plex library: {self.library_name}")
+        plex_log.debug("Connected to plex library: %s", self.library_name)
 
-        self.vc = None
+        # Initialize necessary vars
+        self.voice_channel = None
         self.current_track = None
         self.np_message_id = None
+        self.ctx = None
 
+        # Initialize events
         self.play_queue = asyncio.Queue()
         self.play_next_event = asyncio.Event()
 
+        bot_log.info("Started bot successfully")
         self.bot.loop.create_task(self._audio_player_task())
 
-        bot_log.info("Started bot successfully")
+    def _search_tracks(self, title: str):
+        """Search the Plex music db
 
-    def _search_tracks(self, title):
+        Uses a fuzzy search algorithm to find the closest matching song
+        title in the Plex music database.
+
+        Args:
+            title: str title of song to search for
+
+        Returns:
+            plexapi.audio.Track pointing to closest matching title
+            None if song can't be found.
+
+        Raises:
+            None
+        """
         tracks = self.music.searchTracks()
         score = [None, -1]
         for i in tracks:
-            s = fuzz.ratio(title.lower(), i.title.lower())
+            ratio = fuzz.ratio(title.lower(), i.title.lower())
-            if s > score[1]:
+            if ratio > score[1]:
                 score[0] = i
-                score[1] = s
+                score[1] = ratio
-            elif s == score[1]:
+            elif ratio == score[1]:
                 score[0] = i
 
         return score[0]
 
     async def _play(self):
+        """Heavy lifting of playing songs
+
+        Grabs the appropiate streaming URL, sends the `now playing`
+        message, and initiates playback in the vc.
+
+        Args:
+            None
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         track_url = self.current_track.getStreamURL()
         audio_stream = FFmpegPCMAudio(track_url)
 
-        while self.vc.is_playing():
+        while self.voice_channel.is_playing():
             asyncio.sleep(2)
 
-        self.vc.play(audio_stream, after=self._toggle_next)
+        self.voice_channel.play(audio_stream, after=self._toggle_next)
 
-        plex_log.debug(f"{self.current_track.title} - URL: {track_url}")
+        plex_log.debug("%s - URL: %s", self.current_track, track_url)
 
-        embed, f = self._build_embed(self.current_track)
+        embed, img = self._build_embed(self.current_track)
-        self.np_message_id = await self.ctx.send(embed=embed, file=f)
+        self.np_message_id = await self.ctx.send(embed=embed, file=img)
 
     async def _audio_player_task(self):
+        """Coroutine to handle playback and queuing
+
+        Always-running function awaiting new songs to be added.
+        Auto disconnects from VC if idle for > 15 seconds.
+        Handles auto deletion of now playing song notifications.
+
+        Args:
+            None
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         while True:
             self.play_next_event.clear()
-            if self.vc:
+            if self.voice_channel:
                 try:
                     # Disconnect after 15 seconds idle
                     async with timeout(15):
                         self.current_track = await self.play_queue.get()
                 except asyncio.TimeoutError:
-                    await self.vc.disconnect()
+                    await self.voice_channel.disconnect()
-                    self.vc = None
+                    self.voice_channel = None
 
             if not self.current_track:
                 self.current_track = await self.play_queue.get()
@@ -121,25 +242,54 @@ class Plex(commands.Cog):
             await self.np_message_id.delete()
 
     def _toggle_next(self, error=None):
+        """Callback for vc playback
+
+        Clears current track, then activates _audio_player_task
+        to play next in queue or disconnect.
+
+        Args:
+            error: Optional parameter required for discord.py callback
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         self.current_track = None
         self.bot.loop.call_soon_threadsafe(self.play_next_event.set)
 
-    def _build_embed(self, track, t="play"):
+    def _build_embed(self, track, type_="play"):
         """Creates a pretty embed card.
+
+        Builds a helpful status embed with the following info:
+        Status, song title, album, artistm and album art. All
+        pertitent information is grabbed dynamically from the Plex db.
+
+        Args:
+            track: plexapi.audio.Track object of song
+            type_: Type of card to make (play, queue).
+
+        Returns:
+            embed: discord.embed fully constructed img payload.
+            thumb_art: io.BytesIO of album thumbnail img.
+
+        Raises:
+            ValueError: Unsupported type of embed {type_}
         """
         # Grab the relevant thumbnail
         img_stream = urlopen(track.thumbUrl)
         img = io.BytesIO(img_stream.read())
 
         # Attach to discord embed
-        f = discord.File(img, filename="image0.png")
+        art_file = discord.File(img, filename="image0.png")
         # Get appropiate status message
-        if t == "play":
+        if type_ == "play":
             title = f"Now Playing - {track.title}"
-        elif t == "queue":
+        elif type_ == "queue":
             title = f"Added to queue - {track.title}"
         else:
-            raise ValueError(f"Unsupported type of embed {t}")
+            raise ValueError(f"Unsupported type of embed {type_}")
 
         # Include song details
         descrip = f"{track.album().title} - {track.artist().title}"
@@ -152,16 +302,31 @@ class Plex(commands.Cog):
         # Point to file attached with ctx object.
         embed.set_thumbnail(url="attachment://image0.png")
 
-        bot_log.debug(f"Built embed for {track.title}")
+        bot_log.debug("Built embed for %s", track.title)
 
-        return embed, f
+        return embed, art_file
 
     @command()
     async def play(self, ctx, *args):
+        """User command to start playback
+
+        Searchs plex db and either, initiates playback, or
+        adds to queue. Handles invalid usage from the user.
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+            *args: Title of song to play
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         # Save the context to use with async callbacks
         self.ctx = ctx
 
-        if not len(args):
+        if not args:
             await ctx.send(f"Usage: {self.bot_prefix}play TITLE_OF_SONG")
             bot_log.debug("Failed to play, invalid usage")
             return
@@ -172,75 +337,152 @@ class Plex(commands.Cog):
         # Fail if song title can't be found
         if not track:
             await ctx.send(f"Can't find song: {title}")
-            bot_log.debug(f"Failed to play, can't find song - {title}")
+            bot_log.debug("Failed to play, can't find song - %s", title)
             return
 
         # Fail if user not in vc
-        elif not ctx.author.voice:
+        if not ctx.author.voice:
             await ctx.send("Join a voice channel first!")
             bot_log.debug("Failed to play, requester not in voice channel")
             return
 
         # Connect to voice if not already
-        if not self.vc:
+        if not self.voice_channel:
-            self.vc = await ctx.author.voice.channel.connect()
+            self.voice_channel = await ctx.author.voice.channel.connect()
             bot_log.debug("Connected to vc.")
 
         # Specific add to queue message
-        if self.vc.is_playing():
+        if self.voice_channel.is_playing():
-            bot_log.debug(f"Added to queue - {title}")
+            bot_log.debug("Added to queue - %s", title)
-            embed, f = self._build_embed(track, t="queue")
+            embed, img = self._build_embed(track, type_="queue")
-            await ctx.send(embed=embed, file=f)
+            await ctx.send(embed=embed, file=img)
 
         # Add the song to the async queue
         await self.play_queue.put(track)
 
     @command()
     async def stop(self, ctx):
-        if self.vc:
+        """User command to stop playback
-            self.vc.stop()
+
-            await self.vc.disconnect()
+        Stops playback and disconnects from vc.
-            self.vc = None
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
+        if self.voice_channel:
+            self.voice_channel.stop()
+            await self.voice_channel.disconnect()
+            self.voice_channel = None
             self.ctx = None
             bot_log.debug("Stopped")
             await ctx.send(":stop_button: Stopped")
 
     @command()
     async def pause(self, ctx):
-        if self.vc:
+        """User command to pause playback
-            self.vc.pause()
+
+        Pauses playback, but doesn't reset anything
+        to allow playback resuming.
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
+        if self.voice_channel:
+            self.voice_channel.pause()
             bot_log.debug("Paused")
             await ctx.send(":play_pause: Paused")
 
     @command()
     async def resume(self, ctx):
-        if self.vc:
+        """User command to resume playback
-            self.vc.resume()
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
+        if self.voice_channel:
+            self.voice_channel.resume()
             bot_log.debug("Resumed")
             await ctx.send(":play_pause: Resumed")
 
     @command()
     async def skip(self, ctx):
+        """User command to skip song in queue
+
+        Skips currently playing song. If no other songs in
+        queue, stops playback, otherwise moves to next song.
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         bot_log.debug("Skip")
-        if self.vc:
+        if self.voice_channel:
-            self.vc.stop()
+            self.voice_channel.stop()
             bot_log.debug("Skipped")
             self._toggle_next()
 
-    @command()
+    @command(name="np")
-    async def np(self, ctx):
+    async def now_playing(self, ctx):
+        """User command to get currently playing song.
+
+        Deletes old `now playing` status message,
+        Creates a new one with up to date information.
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         if self.current_track:
-            embed, f = self._build_embed(self.current_track)
+            embed, img = self._build_embed(self.current_track)
             bot_log.debug("Now playing")
             if self.np_message_id:
                 await self.np_message_id.delete()
-                bot_log("Deleted old np status")
+                bot_log.debug("Deleted old np status")
 
-            bot_log("Created np status")
+            bot_log.debug("Created np status")
-            self.np_message_id = await ctx.send(embed=embed, file=f)
+            self.np_message_id = await ctx.send(embed=embed, file=img)
 
     @command()
     async def clear(self, ctx):
+        """User command to clear play queue.
+
+        Args:
+            ctx: discord.ext.commands.Context message context from command
+
+        Returns:
+            None
+
+        Raises:
+            None
+        """
         self.play_queue = asyncio.Queue()
         bot_log.debug("Cleared queue")
         await ctx.send(":boom: Queue cleared.")