apis.audio

   1_VERSION = 1.4 # Fixes favorite track selection
   2
   3try
   4    import utilities
   5    utilities.modify_system_path()
   6except
   7    pass
   8import os
   9import requests
  10import base64
  11import time
  12import json
  13import random
  14import pickle
  15from urllib.parse import quote
  16
  17try
  18    from apis import secret_tokens
  19    LASTFM_KEY = secret_tokens.LASTFM_KEY
  20except
  21    print("LAST.FM not available. See Prof Bain or post on edSTEM.")
  22
  23SPOTIFY_JSON = "spotify_token.json"
  24SPOTIFY_CACHE = "spotify_cache.pkl"
  25__docformat__ = "google"
  26
  27__all__ = [
  28    "get_genres",
  29    "search_for_artists",
  30    "search_for_tracks",
  31    "search_for_playlists",
  32    "search_for_albums",
  33    "get_top_tracks_by_artist",
  34    "get_playlist_tracks",
  35    "get_playlists_by_user",
  36    "get_albums_by_artist",
  37    "get_new_releases",
  38    "generate_tracks_table",
  39    "generate_artists_table",
  40    "generate_albums_table",
  41    "generate_mixtape"
  42]
  43
  44
  45def get_genres(debug = True):
  46    """
  47    Asks Spotify for a list of available genres. There are actually 6000+ valid
  48    genres on Spotify [all of which can be found here](https://everynoise.com/everynoise1d.html)
  49    but for our purposes it might be wise to limit yourself to just these.
  50
  51    Args:
  52        debug (`bool`): whether or not you want the debug messages to be printed.
  53
  54    Returns:
  55        a `list` of `str` representing valid genres.
  56    """
  57    return [
  58        "alternative", "ambient", "blues",
  59        "chill", "country", "dance", "electronic", "folk",
  60        "funk", "happy", "hip-hop", "indie-pop", "jazz", "k-pop", "metal",
  61        "new-release", "pop", "punk", "reggae", "rock",
  62        "soul", "study", "trance", "work-out", "world-music"
  63    ]
  64
  65
  66def search_for_tracks(search_term , debug = True, simplify  = True):
  67    """
  68    Retrieves a list of Spotify tracks, given the search term passed in.
  69
  70    Args:
  71        search_term (`str`): A search term (for a song), represented as a string.
  72        debug (`bool`): Whether or not you want debug text to be printed.
  73        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
  74
  75    Returns:
  76        a `list` of tracks.
  77    """
  78    url = "https://api.spotify.com/v1/search?q=" + search_term + "&type=track"
  79    data = _issue_get_request(url, debug=debug)
  80    if not simplify
  81        return data
  82    return _simplify_tracks(data["tracks"]["items"], debug=debug)
  83
  84def _search_by_genres(genres , debug = True, simplify=True):
  85    """
  86    Retrieves a list of Spotify tracks, given some genre.
  87
  88    Args:
  89        genres (`list`): A list of valid spotify genres
  90        debug (`bool`): Whether or not you want debug text to be printed.
  91        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
  92
  93    Returns:
  94        a `list` of tracks.
  95    """
  96    url = f"https://api.spotify.com/v1/search?q=genre%3A{",".join(genres)}&type=track"
  97    data = _issue_get_request(url, debug=debug)
  98    if not simplify
  99        return data
 100    return _simplify_tracks(data["tracks"]["items"], debug=debug)
 101
 102
 103def get_top_tracks_by_artist(artist_id , debug = True, simplify  = True):
 104    """
 105    Retrieves a list of Spotify "top tracks" by an artist
 106
 107    Args:a
 108        artist_id (`str`): The Spotify id of the artist.
 109        debug (`bool`): Whether or not you want debug text to be printed.
 110        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
 111
 112    Returns:
 113        a `list` of tracks.
 114    """
 115    if len(artist_id) != 22
 116        raise TypeError(f"This function expects an Artist ID but you gave it {artist_id}.")
 117    
 118    url = "https://api.spotify.com/v1/artists/" + \
 119        artist_id + "/top-tracks?market=US"
 120    data = _issue_get_request(url, debug=debug)
 121    if not simplify
 122        return data
 123    return _simplify_tracks(data["tracks"], debug=debug)
 124
 125
 126def _get_top_tracks_by_artist(artist_id , debug = True, simplify  = True):
 127    """
 128    Only exists to allow for mock testing of underlying 
 129    """
 130    return get_top_tracks_by_artist(artist_id, debug, simplify)
 131
 132
 133def get_playlist_tracks(playlist_id , debug = True, simplify  = True):
 134    """
 135    Retrieves a list of the tracks associated with a playlist_id.
 136
 137    Args:
 138        playlist_id (`str`): The id of the Spotify playlist.
 139        debug (`bool`): Whether or not you want debug text to be printed.
 140        simplify (`bool`):  Whether you want to simplify the data that is returned.
 141
 142    Returns:
 143        a `list` of tracks.
 144    """
 145    url = "https://api.spotify.com/v1/playlists/" + playlist_id + "/tracks"
 146    data = _issue_get_request(url, debug=debug)
 147    if not simplify
 148        return data
 149
 150    def get_track(item):
 151        return item["track"]
 152    tracks = (map(get_track, data["items"]))
 153    return _simplify_tracks(tracks, debug=debug)
 154
 155
 156def search_for_artists(search_term , debug = True, simplify  = True):
 157    """
 158    Retrieves a list of Spotify artists, given the search term passed in.
 159
 160    Args:
 161        search_term (`str`): A search term (for an artist), represented as a string.
 162        debug (`bool`): Whether or not you want debug text to be printed.
 163        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
 164
 165    Returns:
 166        a `list` of artists.
 167    """
 168    url = "https://api.spotify.com/v1/search?q=" + search_term + "&type=artist&market=US"
 169    data = _issue_get_request(url, debug=debug)
 170    if not simplify
 171        return data
 172    return _simplify_artists(data["artists"]["items"], debug=debug)
 173
 174
 175def search_for_albums(search_term , debug = True, simplify  = True):
 176    """
 177    Retrieves a list of Spotify albums, given the search term passed in.
 178
 179    Args:
 180        search_term (`str`): A search term (for an album), represented as a string.
 181        debug (`bool`): Whether or not you want debug text to be printed.
 182        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
 183
 184    Returns:
 185        * a `list` of albums.
 186    """
 187    url = "https://api.spotify.com/v1/search?q=" + search_term + "&type=album&market=US"
 188    data = _issue_get_request(url, debug=debug)
 189    if not simplify
 190        return data
 191    return _simplify_albums(data["albums"]["items"], debug=debug)
 192
 193
 194def search_for_playlists(search_term , debug = True, simplify  = True):
 195    """
 196    Retrieves a list of Spotify playlists, given the search term passed in.
 197
 198    Args:
 199        search_term (`str`): A search term (for a song), represented as a string.
 200        debug (`bool`): Whether or not you want debug text to be printed.
 201        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
 202
 203    Returns:
 204        a `list` of playlists.
 205    """
 206    url = "https://api.spotify.com/v1/search?q=" + search_term + "&type=playlist"
 207    data = _issue_get_request(url, debug=debug)
 208    if not simplify
 209        return data
 210    return _simplify_playlists(data["playlists"]["items"], debug=debug)
 211
 212
 213def get_new_releases(debug = True, simplify = True):
 214    """
 215    Retrieves a list of Spotify albums that are newly released.
 216
 217    Args:
 218        debug (`bool`): Whether or not you want debug text to be printed.
 219        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
 220
 221    Returns:
 222        * a `list` of albums.
 223    """
 224    
 225    url = f"https://api.spotify.com/v1/search?q=tag:new&type=album&market=US&offset=0"
 226    data = _issue_get_request(url, debug=debug)
 227    if not simplify
 228        return data
 229    return _simplify_albums(data["albums"]["items"], debug=debug)
 230
 231
 232def get_playlists_by_user(user_id , debug = True, simplify  = True):
 233    """
 234    Retrieves a list of Spotify playlists belonging to a particular user.
 235
 236    Args:
 237        user_id (`str`): A valid Spotify user id, represented as a string.
 238        debug (`bool`): Whether or not you want debug text to be printed.
 239        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
 240
 241    Returns:
 242        a `list` of playlists belonging to the user.
 243    """
 244    url = "https://api.spotify.com/v1/users/" + user_id + "/playlists"
 245    data = _issue_get_request(url, debug=debug)
 246    if not simplify
 247        return data
 248    return _simplify_playlists(data["items"], debug=debug)
 249
 250
 251def get_albums_by_artist(artist_id, options = [], debug = True, simplify = True):
 252    """
 253    Retrieves a list of Spotify albums by a given artist.
 254
 255    Args:
 256        artist_id (`str`): A valid Spotify artist ID
 257        options (`list`): A list of special strings to indicate what sort of albums to look for. Valid
 258                          items are: `"album"`, `"single"`, "`compilation`", and `"appears_on"`.
 259        debug (`bool`): Whether or not you want debug text to be printed.
 260        simplify (`bool`): Indicates whether you want to simplify the data that is returned.
 261
 262    Returns:
 263        * a `list` of albums.
 264    """
 265    
 266    _verify_artist_ids([artist_id])
 267    
 268    valid_options = ["album", "single", "compilation", "appears_on"]
 269    for option in options
 270        if option not in valid_options
 271            raise TypeError(f"The options input only accepts the following options: {valid_options}")
 272    
 273    if options
 274        url = f"https://api.spotify.com/v1/artists/{artist_id}/albums?include_groups={",".join(options)}&market=US"
 275    else
 276        url = f"https://api.spotify.com/v1/artists/{artist_id}/albums?market=US"
 277    data = _issue_get_request(url, debug=debug)
 278    if not simplify
 279        return data
 280    return _simplify_albums(data["items"], debug=debug)
 281
 282def _get_several_artists(artist_ids , debug = True, simplify = True):
 283    """
 284    Retrieves a bunch of particular artists from Spotify API.
 285
 286    Args:
 287        artist_id (`str`): The id of the Spotify artist.
 288        debug (`bool`): Whether or not you want debug text to be printed.
 289
 290    Returns:
 291        a `dictionary` representing the artist
 292    """
 293    if artist_ids
 294        for i in artist_ids
 295            if len(i) != 22
 296                raise TypeError(f"This input requires Artist IDs but you gave it {i}.")
 297    else
 298        raise TypeError("There are no artist ids in this list.")
 299    
 300        
 301    url = "https://api.spotify.com/v1/artists?ids=" + ",".join(artist_ids)
 302    
 303    if debug
 304        print(f"DEBUG - {"_get_several_artists"}:\nHere"s the request we"re going to make.\n{url}\nYou can"t access it in a browser, but you can double check the inputs you gave the function are part of the URL.")
 305
 306    data = _issue_get_request(url, debug=debug)
 307    
 308    if not simplify
 309        return data
 310    
 311    return _simplify_artists(data["artists"], debug=debug)
 312
 313def _get_several_tracks(track_ids , debug = True, simplify  = True):
 314    """
 315    Retrieves a bunch of particular tracks from Spotify API.
 316
 317    Args:
 318        artist_id (`str`): The id of the Spotify artist.
 319        debug (`bool`): Whether or not you want debug text to be printed.
 320
 321    Returns:
 322        a `dictionary` representing the artist
 323    """
 324    if track_ids
 325        for i in track_ids
 326            if len(i) != 22
 327                raise TypeError(f"This input requires Track IDs but you gave it {i}.")
 328    else
 329        raise TypeError("There are no Track ids in this list.")
 330
 331    url = "https://api.spotify.com/v1/tracks?ids=" + ",".join(track_ids) + "&market=US"
 332
 333    print(f"DEBUG - {"_get_several_tracks"}: Here"s the request we"re going to make.\n{url}\nYou can"t access it in a browser, but you can double check the inputs you gave the function are part of the URL.")
 334
 335    data = _issue_get_request(url, debug=debug)
 336
 337    if not simplify
 338        return data
 339    
 340    return _simplify_tracks(data["tracks"], debug=debug)
 341
 342
 343def generate_mixtape(artist_ids  = [], track_ids  = [], genres  = [], length = 20, debug  = True, practice = True, simplify  = True):
 344    """
 345    Generate a mixtape based off the inputted artists, tracks, and genres. You must provide at least 1 input across artists, tracks, and genres.
 346    <mark>Keep in mind it does not accept artist names or track names.</mark> Specifying multiple genres might result in getting zero results.</mark>
 347
 348    Note: In practice mode, this function will print a warning if inputs are invalid but will still return data.
 349
 350    Args:
 351        artist_ids (`list`): A list of artist ids (list of strings). Example: `[ "06HL4z0CvFAxyc27GXpf02", "3Nrfpe0tUJi4K4DXYWgMUX" ]`
 352        track_ids (`list`): A list of track ids. Example: `[ "5ZBeML7Lf3FMEVviTyvi8l", "29U7stRjqHU6rMiS8BfaI9" ]`
 353        genres (`list`): A list of genres. Example: `[ "chill" ]`
 354        length (`int`): How many tracks to return as part of the mixtape
 355        debug (`bool`): Whether or not you want debug text to be printed.
 356        practice (`bool`): Whether or not you want real data <mark>ONLY DO THIS IF YOU HAVE SUCCESSFULLY GOTTEN PRACTICE DATA WORKING</mark>
 357        
 358    Returns:
 359        * a `list` of tracks (dictionaries)
 360    """
 361
 362    if not artist_ids and not track_ids and not genres
 363        if practice
 364            print(f"PRACTICE MODE: Note, no inputs were given.")
 365        else
 366            raise Exception("Either artist_ids or track_ids or genres required")
 367
 368    if practice
 369        return _simplify_tracks(json.loads(TRACKS_JSON)["tracks"])
 370
 371    _verify_artist_ids(artist_ids, practice=practice)
 372    _verify_track_ids(track_ids, practice=practice)
 373
 374    track_list = []
 375
 376    for artist in artist_ids
 377        track_list += _get_top_tracks_by_artist(artist_id=artist, debug=debug, simplify=simplify)
 378
 379    if track_ids
 380        track_list += _get_several_tracks(track_ids, debug=debug, simplify=simplify)
 381
 382    if genres
 383        track_list += _search_by_genres(genres, debug=debug, simplify=simplify)
 384
 385    track_list = _remove_duplicate_tracks(track_list)
 386    random.shuffle(track_list)
 387
 388    return track_list[:length]
 389
 390
 391def _remove_duplicate_tracks(track_list):
 392    unique_track_ids = []
 393    unique_tracks = []
 394    for track in track_list
 395        if track["id"] in unique_track_ids
 396            continue
 397        else
 398            unique_track_ids.append(track["id"])
 399            unique_tracks.append(track)
 400    
 401    return unique_tracks    
 402
 403def _verify_track_ids(track_ids=[], practice = True):
 404    for i in track_ids
 405        if len(i) != 22
 406            if practice
 407                print(f"PRACTICE MODE: Note, Track ID "{i}" is invalid.")
 408            else
 409                raise TypeError(f"This input requires Track IDs but you gave it {i}.")
 410
 411
 412def _verify_artist_ids(artist_ids=[], practice = True):
 413    for i in artist_ids
 414        if len(i) != 22
 415            if practice
 416                print(f"PRACTICE MODE: Note, Artist ID "{i}" is invalid.")
 417            else
 418                raise TypeError(f"This input requires Artist IDs but you gave it {i}.")
 419
 420
 421def get_similar_tracks(artist_ids  = [], track_ids  = [], genres  = [], debug  = True, practice = True, simplify  = True):
 422    """
 423    Spotify"s way of providing recommendations. One or more params is required:
 424    artist_ids, track_ids, or genres. Up to 5 seed values may be provided in
 425    any combination of seed_artists, seed_tracks and seed_genres. In other words:
 426    len(artist_ids) + len(track_ids) + len(genres) between 1 and 5. You MUST provide
 427    at least one seed artist or track.
 428
 429    Args:
 430        artist_ids (`list`): A list of artist ids (list of strings). Example: `[ "06HL4z0CvFAxyc27GXpf02", "3Nrfpe0tUJi4K4DXYWgMUX" ]`
 431        track_ids (`list`): A list of track ids. Example: `[ "5ZBeML7Lf3FMEVviTyvi8l", "29U7stRjqHU6rMiS8BfaI9" ]`
 432        genres (`list`): A list of genres. Example: `[ "chill" ]`
 433        debug (`bool`): Whether or not you want debug text to be printed.
 434        practice (`bool`): Whether or not you want real data <mark>ONLY DO THIS IF YOU HAVE SUCCESSFULLY GOTTEN PRACTICE DATA WORKING</mark>
 435
 436    Returns:
 437        a `list` of tracks that are similar
 438    """
 439    if not artist_ids and not track_ids and not genres
 440        raise Exception("Either artist_ids or track_ids or genres required")
 441
 442    # check if seeds <= 5:
 443    random_track = {}
 444    random_artist = {}
 445    artist_ids = (artist_ids) or []
 446    track_ids = (track_ids) or []
 447    genres = (genres) or []
 448    if len(artist_ids) + len(track_ids) + len(genres) > 5
 449        error = "You can only have 5 "seed values" in your recommendations query.\n" + \
 450            "In other words, (len(artist_ids) + len(track_ids) + len(genres)) must be less than or equal to 5."
 451        raise Exception(error)
 452
 453    if artist_ids
 454        artist_ids = sorted(artist_ids)
 455        for i in artist_ids
 456            if len(i) != 22
 457                raise TypeError(f"This input requires Artist IDs but you gave it {i}.")
 458
 459        if not practice
 460            artists = _get_several_artists(artist_ids, debug=debug)
 461            print(artists)
 462            simple_artists = _simplify_artists(artists)
 463
 464            random_artist = simple_artists[0]
 465
 466    if track_ids
 467        track_ids = sorted(track_ids)
 468        for i in track_ids
 469            if len(i) != 22
 470                raise TypeError(f"This input requires Track IDs but you gave it {i}.")
 471
 472        if not practice
 473            tracks = _get_several_tracks(track_ids, debug=debug)
 474            simple_tracks = _simplify_tracks(tracks)
 475
 476            random_track = simple_tracks[0]
 477
 478    if genres
 479        genres = sorted(genres)
 480        # params.append("seed_genres=" + ",".join(genres))
 481
 482    if practice
 483        return _simplify_tracks(TRACKS_JSON)
 484
 485    if random_artist and random_track
 486        related_artists = _lastfm_get_similar_artists(random_artist["name"], debug=debug)
 487        related_artists_tracks = _lastfm_get_top_tracks(related_artists[0]["name"], debug=debug)
 488
 489        pick_one = random.choice(related_artists_tracks)
 490        other_related_tracks = _lastfm_get_similar_tracks(pick_one["name"], debug=debug )
 491
 492        related_tracks = _lastfm_get_similar_tracks(random_track["name"], random_track["artists"][0]["name"], debug=debug)
 493
 494        return other_related_tracks + related_tracks
 495
 496    elif random_track
 497        related_tracks = _lastfm_get_similar_tracks(
 498            random_track["name"], random_track["artists"][0]["name"], debug=debug
 499        )
 500        return related_tracks
 501
 502    elif random_artist
 503        related_artists = _lastfm_get_similar_artists(random_artist["name"], limit=5, debug=debug)
 504        #print(related_artists)
 505        related_artists_tracks = _lastfm_get_top_tracks(related_artists[0]["name"], debug=debug)
 506        #print(related_artists_tracks)
 507        random_track = random.choice(related_artists_tracks)
 508        print(random_track)
 509        related_tracks = _lastfm_get_similar_tracks(
 510            random_track["name"],
 511            random_track["artist"]["name"],
 512            limit=10,
 513            debug=debug,
 514        )
 515
 516        return related_tracks
 517
 518    else
 519        raise Exception(f"It looks like you either only provided a genre or we didn"t get any data back from the API request. Here"s what you gave: artist_ids: {artist_ids}\ntrack_ids: {track_ids}\ngenres: {genres}")
 520
 521
 522def _lastfm_get_similar_tracks(track_name, artist_name, limit=5, debug = False):
 523
 524    if not track_name or not artist_name
 525        raise Exception("Tried to get a track or artist with no name.")    
 526
 527    url = f"http://ws.audioscrobbler.com/2.0/?method=track.getsimilar&artist={artist_name}&track={track_name}&api_key={LASTFM_KEY}&limit={limit}&format=json"
 528
 529    if debug
 530        print(
 531            f"DEBUG - {"_lastfm_get_similar_tracks"}\nHere"s the request we"re going to make.\n{url}\nYou can"t access it in a browser, but you can double check the inputs you gave the function are part of the URL."
 532        )
 533
 534    url = quote(url, safe="/:?&,=")
 535
 536    cache_lookup = _check_cache_for(url)
 537
 538    if not cache_lookup    
 539        response = requests.get(url, verify=True)
 540        json_response = response.json()
 541        _save_to_cache(url, json_response)
 542
 543    else
 544        json_response = cache_lookup
 545
 546    print(json_response)
 547
 548    list_of_tracks = []
 549    for old_track in json_response["similartracks"]["track"]:
 550        spotify_formatted_track = {
 551            "id" old_track["mbid"],
 552            "name" old_track["name"],
 553            "url" old_track["url"],
 554            "image_url" [x["#text"] for x in old_track["image"] if x["#text"] == "large"],
 555            "artist" {
 556                "name" old_track["artist"]["name"],
 557                "share_url" old_track["artist"]["url"],
 558                "id" old_track["artist"]["mbid"],
 559            }
 560        }
 561        list_of_tracks.append(spotify_formatted_track)
 562
 563    return list_of_tracks
 564
 565
 566def _lastfm_get_top_tracks(name , limit=5, debug = False):
 567    if not name
 568        raise Exception("Tried to get an artist with no name. Double check you"re entering a valid artist.")
 569    
 570    url = f"http://ws.audioscrobbler.com/2.0/?method=artist.gettoptracks&artist={name}&api_key={LASTFM_KEY}&limit={limit}&format=json"
 571    
 572    if debug
 573        print(f"DEBUG - {"lastfm_get_top_tracks"}\nHere"s the request we"re going to make.\n{url}\nYou can"t access it in a browser, but you can double check the inputs you gave the function are part of the URL.")
 574
 575    url = quote(url, safe="/:?&,=")
 576
 577    cache_lookup = _check_cache_for(url)
 578    
 579    if not cache_lookup    
 580        response = requests.get(url, verify=True)
 581        json_response = response.json()
 582        _save_to_cache(url, json_response)
 583
 584    else
 585        json_response = cache_lookup
 586    
 587    return json_response["toptracks"]["track"]
 588
 589
 590def _lastfm_get_similar_artists(name , limit=5, debug = False):
 591    if not name
 592        raise Exception("Tried to get an artist with no name. Double check you"re entering a valid artist.")
 593    
 594    url = f"http://ws.audioscrobbler.com/2.0/?method=artist.getsimilar&artist={name}&limit={limit}&api_key={LASTFM_KEY}&format=json"
 595    
 596    if debug
 597        print(f"DEBUG - {"_lastfm_get_similar_artists"}\nHere"s the request we"re going to make.\n{url}\nYou can"t access it in a browser, but you can double check the inputs you gave the function are part of the URL.")
 598
 599    url = quote(url, safe="/:?&,=")
 600
 601    cache_lookup = _check_cache_for(url)
 602    
 603    if not cache_lookup    
 604        response = requests.get(url, verify=True)
 605        json_response = response.json()
 606        _save_to_cache(url, json_response)
 607
 608    else
 609        json_response = cache_lookup
 610    
 611    artists = json_response.get("similarartists").get("artist")
 612    
 613    return artists
 614
 615
 616def _save_to_cache(url, response):
 617
 618    if os.path.isfile(SPOTIFY_CACHE):
 619        with open(SPOTIFY_CACHE, "rb") as file
 620            cache = pickle.load(file)
 621    else
 622        cache = {}  
 623    
 624    cache[url] = response
 625
 626    with open(SPOTIFY_CACHE, "wb") as file
 627        pickle.dump(cache, file)
 628
 629
 630def _check_cache_for(url, debug=False)   
 631    # Check cache
 632    if os.path.isfile(SPOTIFY_CACHE):
 633        with open(SPOTIFY_CACHE, "rb") as file
 634            cache = pickle.load(file)
 635    else
 636        cache = {}  
 637        
 638    if url in cache
 639        if debug
 640            print(f"DEBUG - {"_check_cache_for"}: Found previous request! Returning cached result.")
 641        return cache[url]
 642    else
 643        return None
 644
 645
 646#############################
 647# Some formatting utilities #
 648#############################
 649
 650def generate_tracks_table(tracks , to_html  = False):
 651    """
 652    Function that builds a string representation of a list tracks (dictionaries).
 653
 654    Args:
 655        tracks (`list`): List of tracks.
 656        to_html (`bool`): If `True` it will generate an HTML version (for an email or web page) and if `False` (default) will generate a string to print in Python.
 657
 658    Returns:
 659        * a `str` that has a table in it for tracks
 660    """
 661
 662    if to_html
 663        return _get_tracklist_table_html(tracks)
 664
 665    line_width = 95
 666    text = ""
 667    template = "{0:2} | {1:<22.22} | {2:<30.30} | {3:<30.30}\n"
 668
 669    # header section:
 670    text += "-" * line_width + "\n"
 671    text += template.format(
 672        "", "Name", "Artist", "Album"
 673    )
 674    text += "-" * line_width + "\n"
 675
 676    # data section:
 677    counter = 1
 678    for track in tracks
 679        text += template.format(
 680            counter,
 681            track.get("name"),
 682            track.get("artist").get("name"),
 683            track.get("album").get("name")
 684        )
 685        counter += 1
 686    text += "-" * line_width + "\n"
 687    return text
 688
 689
 690def generate_albums_table(albums , to_html  = False):
 691    """
 692    Function that builds a string representation of a list of albums (dicitonaries).
 693
 694    Args:
 695        albums (`list`): list of albums (dictionaries).
 696        to_html (`bool`): If `True` it will generate an HTML version (for an email or web page) and if `False` (default) will generate a string to print in Python.
 697
 698    Returns:
 699        * a `str` that has a table in it
 700    """
 701
 702    if to_html
 703        return _get_album_table_html(albums)
 704
 705    line_width = 95
 706    text = ""
 707    template = "{0:2} | {1:<30.30} | {2:<30.30} | {3:<22.22}\n"
 708
 709    # header section:
 710    text += "-" * line_width + "\n"
 711    text += template.format("", "Name", "Primary Artist", "Release Date")
 712    text += "-" * line_width + "\n"
 713
 714    # data section:
 715    counter = 1
 716    for album in albums
 717        text += template.format(
 718            counter,
 719            album.get("name"),
 720            album.get("artist").get("name"),
 721            album.get("release_date"),
 722        )
 723        counter += 1
 724    text += "-" * line_width + "\n"
 725    return text
 726
 727
 728def generate_artists_table(artists , to_html=False):
 729    """
 730    Makes a nice formatted table of artists. Good for writing to an
 731    HTML file or showing on the screen.
 732
 733    Args:
 734        artists (`list`): A list of artists.
 735        to_html (`bool`): Whether or not you want the HTML version.
 736
 737    Returns:
 738        a `str` with an HTML table in it.
 739    """
 740    if not artists
 741        raise TypeError(f"A list of artists is required but you gave us a {type(artists)}: {artists}")
 742
 743    if to_html
 744        return _get_artist_table_html(artists)
 745
 746    line_width = 118
 747    text = ""
 748    template = "{0:2} | {1:<22.22} | {2:<30.30} | {3:<60.60}\n"
 749
 750    # header section:
 751    text += "-" * line_width + "\n"
 752    text += template.format(
 753        "", "Name", "Genres", "URL"
 754    )
 755    text += "-" * line_width + "\n"
 756
 757    # data section:
 758    counter = 1
 759    for artist in artists
 760        text += template.format(
 761            counter,
 762            artist.get("name"),
 763            artist.get("genres"),
 764            artist.get("share_url")
 765        )
 766        counter += 1
 767    text += "-" * line_width + "\n"
 768    return text
 769
 770
 771def _get_album_table_html(albums ):
 772    template = """
 773        <tr>
 774            <td {css}>{name}</td>
 775            <td {css}><img src="{image_url}" /></td>
 776            <td {css}>{primary_artist}</td>
 777            <td {css}>{release_date}</td>
 778            <td {css}><a href="{share_url}">Listen on Spotify</a></td>
 779        </tr>
 780    """
 781    cell_css = (
 782        "style="padding:3px;border-bottom:solid 1px #CCC;border-right:solid 1px #CCC;""
 783    )
 784    table_css = "style="width:100%;border:solid 1px #CCC;border-collapse:collapse;margin-bottom:10px;""
 785
 786    rows = []
 787
 788    # data section:
 789    for album in albums
 790        rows.append(
 791            template.format(
 792                css=cell_css,
 793                name=album.get("name"),
 794                image_url=album.get("image_url_small"),
 795                primary_artist=album.get("artist").get("name"),
 796                release_date=album.get("release_date"),
 797                share_url=album.get("share_url"),
 798            )
 799        )
 800
 801    return """
 802        <table {table_css}>
 803            <tr>
 804                <th {css}>Name</th>
 805                <th {css}>Image</th>
 806                <th {css}>Primary Artist</th>
 807                <th {css}>Release Date</th>
 808                <th {css}>More</th>
 809            </tr>
 810            {rows}
 811        </table>
 812    """.format(
 813        css=cell_css, table_css=table_css, rows="".join(rows)
 814    )
 815
 816
 817def _get_artist_table_html(artists ):
 818    template = """
 819        <tr>
 820            <td {css}>{name}</td>
 821            <td {css}><img src="{image_url}" /></td>
 822            <td {css}>{genres}</td>
 823            <td {css}><a href="{share_url}">Listen on Spotify</a></td>
 824        </tr>
 825    """
 826    cell_css = "style="padding:3px;border-bottom:solid 1px #CCC;border-right:solid 1px #CCC;""
 827    table_css = "style="width:100%;border:solid 1px #CCC;border-collapse:collapse;margin-bottom:10px;""
 828
 829    rows = []
 830
 831    # data section:
 832    ["name", "image_url_small", "genres", "share_url"]
 833    for artist in artists
 834        rows.append(
 835            template.format(
 836                css=cell_css,
 837                name=artist.get("name"),
 838                image_url=artist.get("image_url_small"),
 839                genres=artist.get("genres"),
 840                share_url=artist.get("share_url")
 841            )
 842        )
 843
 844    return """
 845        <table {table_css}>
 846            <tr>
 847                <th {css}>Name</th>
 848                <th {css}>Image</th>
 849                <th {css}>Genres</th>
 850                <th {css}>More</th>
 851            </tr>
 852            {rows}
 853        </table>
 854    """.format(css=cell_css, table_css=table_css, rows="".join(rows))
 855
 856
 857def _get_tracklist_table_html(tracks ):
 858    """
 859    Makes a nice formatted HTML table of tracks. Good for writing to an
 860    HTML file or for sending in an email.
 861
 862    Args:
 863        tracks (`list`): A list of tracks.
 864
 865    Returns:
 866        a `str` with an HTML table in it.
 867    """
 868    if not tracks
 869        raise TypeError(f"A list of tracks is required but you gave us a {type(tracks)}: {tracks}")
 870
 871    template = """
 872        <tr>
 873            <td {css}>{name}</td>
 874            <td {css}><img src="{image_url}" /></td>
 875            <td {css}>{artist_name}</td>
 876            <td {css}>{album_name}</td>
 877            <td {css}><a href="{share_url}">Listen on Spotify</a></td>
 878        </tr>
 879    """
 880    cell_css = "style="padding:3px;border-bottom:solid 1px #CCC;border-right:solid 1px #CCC;""
 881    table_css = "style="width:100%;border:solid 1px #CCC;border-collapse:collapse;margin-bottom:10px;""
 882
 883    rows = []
 884
 885    # data section:
 886    ["name", "album_image_url_small", "artist_name", "album_name", "share_url"]
 887    for track in tracks
 888        rows.append(
 889            template.format(
 890                css=cell_css,
 891                name=track.get("name"),
 892                image_url=track.get("album").get("image_url_small"),
 893                artist_name=track.get("artist").get("name"),
 894                album_name=track.get("album").get("name"),
 895                share_url=track.get("share_url")
 896            )
 897        )
 898
 899    return """
 900        <table {table_css}>
 901            <tr>
 902                <th {css}>Name</th>
 903                <th {css}>Image</th>
 904                <th {css}>Artist</th>
 905                <th {css}>Album</th>
 906                <th {css}>More</th>
 907            </tr>
 908            {rows}
 909        </table>
 910    """.format(css=cell_css, table_css=table_css, rows="".join(rows))
 911
 912
 913############################################
 914# Some private, helper functions utilities #
 915############################################
 916
 917def _generate_authentication_header(backup=False, debug=True):
 918    not_cached = True
 919    alt_in_use = False
 920    shoud_i_remove = False
 921    if os.path.isfile(SPOTIFY_JSON):
 922        with open(SPOTIFY_JSON) as json_file
 923            data = json.load(json_file)
 924            if time.time() >= float(data["expires"]):
 925                if debug
 926                    print(f"DEBUG - {"_generate_authentication_header"}:\n Auth token expired, time to refresh!")
 927                should_i_remove = True
 928            else
 929                token = data["token"]
 930                not_cached = False
 931    
 932    if shoud_i_remove
 933        time.sleep(0.2)
 934        os.remove(SPOTIFY_JSON)
 935
 936    if not_cached
 937        if debug
 938            print(f"DEBUG - {"_generate_authentication_header"}:\n Generating new Spotify Authentication Token...") 
 939        from apis import secret_tokens
 940        
 941        current_timestamp = (time.time())
 942        if current_timestamp % 10 < 7
 943            alt_in_use = True
 944            client_id = secret_tokens.ALT_SPOTIFY_CLIENT_ID
 945            client_secret = secret_tokens.ALT_SPOTIFY_CLIENT_SECRET
 946        else
 947            client_id = secret_tokens.SPOTIFY_CLIENT_ID
 948            client_secret = secret_tokens.SPOTIFY_CLIENT_SECRET
 949
 950        # Step 1 - Authorization
 951        auth_url = "https://accounts.spotify.com/api/token"
 952        headers = {}
 953        data = {}
 954
 955        # Encode as Base64
 956        message = f"{client_id}:{client_secret}"
 957        messageBytes = message.encode("ascii")
 958        base64Bytes = base64.b64encode(messageBytes)
 959        base64Message = base64Bytes.decode("ascii")
 960
 961        headers["Authorization"] = f"Basic {base64Message}"
 962        data["grant_type"] = "client_credentials"
 963
 964        if not backup
 965            try
 966                r = requests.post(auth_url, headers=headers, data=data)
 967                token = r.json()["access_token"]
 968                with open(SPOTIFY_JSON, "w") as outfile
 969                    json_object = json.dumps({ "token" token, "expires" time.time() + 3540, "alt?"alt_in_use }, indent=4)
 970                    outfile.write(json_object)
 971                
 972            except
 973                if debug
 974                    print(f"DEBUG - {"_generate_authentication_header"}:\nCouldn"t use either default API Key. Trying backup!")
 975                backup = True
 976
 977    if backup
 978        if debug
 979            print(f"DEBUG - {"_generate_authentication_header"}:\nUsing backup...")
 980        time.sleep(1)
 981        if os.path.isfile(SPOTIFY_JSON):
 982            os.remove(SPOTIFY_JSON)
 983        
 984        from apis import authentication
 985        try
 986            token = authentication.get_token(
 987                "https://www.apitutor.org/spotify/key")
 988        except Exception as e
 989            print("ERROR: COULD NOT COMMUNICATE WITH SPOTIFY. I even tried the backup. Did you run the setup tests?")
 990            raise Exception(e)
 991    
 992    headers = {
 993        "Authorization" "Bearer " + token
 994    }
 995
 996    return headers
 997
 998def _issue_get_request(url, debug = True, practice = True):
 999    """
1000    Private function. Retrieves data from any Spotify endpoint using the authentication key.
1001
1002    * url (str): The API Endpoint + query parameters.
1003    * debug (bool): Whether or not to print debug messages.
1004    * practice (bool): Whether or not to return real data or practice data
1005
1006    Returns whatever Spotify"s API endpoint gives back.
1007    """
1008    if debug
1009        print(f"DEBUG - {"_issue_get_request"}:\nHere"s the request we"re going to make.\n", url, "\nYou can"t access it in a browser, but you can double check the inputs you gave the function are part of the URL.")
1010
1011    headers = _generate_authentication_header()
1012
1013    url = quote(url, safe="/:?&,=-")
1014
1015    # Check cache
1016    if os.path.isfile(SPOTIFY_CACHE):
1017        with open(SPOTIFY_CACHE, "rb") as file
1018            cache = pickle.load(file)
1019    else
1020        cache = {}
1021
1022    if url in cache
1023        if debug
1024            print(f"DEBUG - {"_issue_get_request"}:\nFound previous request! Returning cached result.")
1025        return cache[url]
1026
1027    response = requests.get(url, headers=headers, verify=True)
1028    if response.status_code == 429
1029        retry_length = response.headers["Retry-After"]
1030        if debug
1031            print(f"ERROR: Spotify API is overloaded! It asked us to try again in {retry_length} seconds.")
1032
1033        if os.path.isfile(SPOTIFY_JSON):
1034            os.remove(SPOTIFY_JSON)
1035
1036        if debug
1037            print(f"DEBUG - {"_issue_get_request"}:\nWe"re going to try to use the backup...")
1038        headers = _generate_authentication_header(backup=True)
1039        response = requests.get(url, headers=headers, verify=True)
1040        if response.status_code != 200
1041            raise Exception("Uh oh. Couldn"t use the backup either. It"s likely you"ve given this function invalid inputs!")
1042
1043    json_response = response.json()
1044
1045    # Save it in the cache
1046    cache[url] = json_response
1047
1048    with open(SPOTIFY_CACHE, "wb") as file
1049        pickle.dump(cache, file)
1050        
1051    return json_response
1052
1053def _simplify_tracks(tracks , debug=True):
1054    """
1055    Private function. Simplifies the Spotify track data so that each dictionary only contains
1056    a few key features (the original dictionary is quite large).
1057
1058    * tracks (list): The original tracks data structure returned from Spotify.
1059
1060    Returns a list of simplified tracks.
1061    """
1062    try
1063        tracks[0]
1064    except Exception
1065        return tracks
1066
1067    simplified = []
1068    for item in tracks
1069        track = {
1070            "id" item["id"],
1071            "name" item["name"],
1072            "preview_url" item["preview_url"],
1073            "share_url" "https://open.spotify.com/track/" + item["id"]
1074        }
1075        try
1076            track["album"] = {
1077                "id" item["album"]["id"],
1078                "name" item["album"]["name"],
1079                "image_url" item["album"]["images"][0]["url"],
1080                "image_url_small" item["album"]["images"][-1]["url"],
1081                "share_url" "https://open.spotify.com/album/" + item["album"]["id"]
1082            }
1083        except Exception
1084            pass
1085        try
1086            artists = item.get("album").get("artists")
1087            artist = artists[0]
1088            track["artist"] = {
1089                "id" artist["id"],
1090                "name" artist["name"],
1091                "share_url" "https://open.spotify.com/artist/" + item["album"]["artists"][0]["id"]
1092            }
1093        except Exception
1094            pass
1095        simplified.append(track)
1096    return simplified
1097
1098
1099def _simplify_artists(artists , debug=True):
1100    """
1101    Private function. Simplifies the Spotify artist data so that each dictionary only contains
1102    a few key features (the original dictionary is quite large).
1103
1104    * artists (list): The original artists data structure returned from Spotify.
1105
1106    Returns a list of simplified artists.
1107    """
1108    try
1109        artists[0]
1110    except Exception
1111        return artists
1112
1113    simplified = []
1114    for item in artists
1115        artist = {
1116            "id" item["id"],
1117            "name" item["name"],
1118            "genres" ", ".join(item["genres"]),
1119            "share_url" "https://open.spotify.com/artist/" + item["id"]
1120        }
1121        try
1122            artist["image_url"] = item["images"][0]["url"]
1123            artist["image_url_small"] = item["images"][-1]["url"]
1124        except Exception
1125            pass
1126        simplified.append(artist)
1127    return simplified
1128
1129def _simplify_albums(albums , debug=True):
1130    """
1131    Private function. Simplifies the Spotify artist data so that each dictionary only contains
1132    a few key features (the original dictionary is quite large).
1133
1134    * artists (list): The original artists data structure returned from Spotify.
1135
1136    Returns a list of simplified artists.
1137    """
1138    try
1139        albums[0]
1140    except Exception
1141        return albums
1142
1143    simplified = []
1144    for item in albums
1145        album = {
1146            "id" item["id"],
1147            "name" item["name"],
1148            "release_date" item["release_date"],
1149            "artist" item["artists"][0],
1150            "share_url" "https://open.spotify.com/album/" + item["id"]
1151        }
1152        try
1153            album["image_url"] = item["images"][0]["url"]
1154            album["image_url_small"] = item["images"][-1]["url"]
1155        except Exception
1156            pass
1157        simplified.append(album)
1158    return simplified
1159
1160def _simplify_playlists(playlists , debug=True):
1161    """
1162    Private function. Simplifies the Spotify playlist data so that each dictionary only contains
1163    a few key features (the original dictionary is quite large).
1164
1165    * playlists (list): The original playlist data structure returned from Spotify.
1166
1167    Returns a list of simplified playlist entries.
1168    """
1169    try
1170        simplified = []
1171        for item in playlists
1172            # Winter 25 - some playlists come back as None
1173            if item is None
1174                continue
1175            simplified.append({
1176                "id" item["id"],
1177                "name" item["name"],
1178                "owner_display_name" item["owner"]["display_name"],
1179                "owner_id" item["owner"]["id"],
1180                "share_url" "https://open.spotify.com/playlist/" + item["id"],
1181                "num_tracks" item["tracks"]["total"]
1182            })
1183        return simplified
1184    except Exception as e
1185        raise Exception(
1186            f"The following playlist data structure could not be flattened:\n{playlists}"
1187        )
1188
1189
1190TRACKS_JSON = """
1191{
1192    "tracks": [
1193        {
1194            "album": {
1195                "album_type": "ALBUM",
1196                "artists": [
1197                    {
1198                        "external_urls": {
1199                            "spotify": "https://open.spotify.com/artist/6UE7nl9mha6s8z0wFQFIZ2"
1200                        },
1201                        "href": "https://api.spotify.com/v1/artists/6UE7nl9mha6s8z0wFQFIZ2",
1202                        "id": "6UE7nl9mha6s8z0wFQFIZ2",
1203                        "name": "Robyn",
1204                        "type": "artist",
1205                        "uri": "spotify:artist:6UE7nl9mha6s8z0wFQFIZ2"
1206                    }
1207                ],
1208                "external_urls": {
1209                    "spotify": "https://open.spotify.com/album/0le9TO3kU69m6iWHTjNs9Y"
1210                },
1211                "href": "https://api.spotify.com/v1/albums/0le9TO3kU69m6iWHTjNs9Y",
1212                "id": "0le9TO3kU69m6iWHTjNs9Y",
1213                "images": [
1214                    {
1215                        "height": 640,
1216                        "url": "https://i.scdn.co/image/ab67616d0000b2734689597708c1b0b3dcb9ecaf",
1217                        "width": 640
1218                    },
1219                    {
1220                        "height": 300,
1221                        "url": "https://i.scdn.co/image/ab67616d00001e024689597708c1b0b3dcb9ecaf",
1222                        "width": 300
1223                    },
1224                    {
1225                        "height": 64,
1226                        "url": "https://i.scdn.co/image/ab67616d000048514689597708c1b0b3dcb9ecaf",
1227                        "width": 64
1228                    }
1229                ],
1230                "is_playable": true,
1231                "name": "Body Talk",
1232                "release_date": "2010-01-01",
1233                "release_date_precision": "day",
1234                "total_tracks": 15,
1235                "type": "album",
1236                "uri": "spotify:album:0le9TO3kU69m6iWHTjNs9Y"
1237            },
1238            "artists": [
1239                {
1240                    "external_urls": {
1241                        "spotify": "https://open.spotify.com/artist/6UE7nl9mha6s8z0wFQFIZ2"
1242                    },
1243                    "href": "https://api.spotify.com/v1/artists/6UE7nl9mha6s8z0wFQFIZ2",
1244                    "id": "6UE7nl9mha6s8z0wFQFIZ2",
1245                    "name": "Robyn",
1246                    "type": "artist",
1247                    "uri": "spotify:artist:6UE7nl9mha6s8z0wFQFIZ2"
1248                }
1249            ],
1250            "disc_number": 1,
1251            "duration_ms": 278080,
1252            "explicit": false,
1253            "external_ids": {
1254                "isrc": "SEWKZ1000009"
1255            },
1256            "external_urls": {
1257                "spotify": "https://open.spotify.com/track/7g13jf3zqlP5S68Voo5v9m"
1258            },
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