index.php

<?php

require 'access.inc.php';

$topArtistsCount = 40;
$playlistsCount = 24;

$tracksCountInShortPlaylist = 50;
$tracksCountInLongPlaylist = 100;

$templateData = [
  'user' => $user,
  'playlists' => [],
  'topArtists' => [],
  'playlist' => null,

  'page' => 'playlist-generator',
  'infos' => [],
  'errors' => [],
];

$generatePlaylistFromPlaylist = isset($_GET['generate-playlist-from-playlist']);
$generatePlaylistFromSelectedTopArtists = isset($_GET['generate-playlist-top-artists']);
$generatePlaylistFromRandomTopArtists = isset($_GET['generate-playlist-random-top-artists']);
$generateQuickPlaylistFromDailyMixes = isset($_GET['generate-quick-playlist-from-daily-mixes']);
$generateQuickPlaylistTambouilleMix = isset($_GET['generate-quick-playlist-tambouille-mix']);
$showPlaylistContent = isset($_GET['show-playlist']);

$action = '';
if ($generatePlaylistFromPlaylist) {
    $action = 'generate-playlist-from-playlist';
} elseif ($generatePlaylistFromSelectedTopArtists) {
    $action = 'generate-playlist-from-selected-top-artists';
} elseif ($generatePlaylistFromRandomTopArtists) {
    $action = 'generate-playlist-from-random-top-artists';
} elseif ($generateQuickPlaylistFromDailyMixes) {
    $action = 'generate-playlist-from-daily-mixes';
} elseif ($generateQuickPlaylistTambouilleMix) {
    $action = 'generate-playlist-tambouille-mix';
} elseif ($showPlaylistContent) {
    $action = 'show-playlist-content';
} else {
}

switch ($action) {
    case 'generate-playlist-from-playlist':
        $selectedPlaylists = $_GET['selected-playlist'];
        printLog('Will create new playlist with recommendations from playlists: '.join(', ', $selectedPlaylists).'".');
        $recommendedTrackIds = [];

        $shouldFilterByArtists = isset($_GET['check-playlist-filter-artists']);
        printLog('Filter by artists in source playlists: '.($shouldFilterByArtists ? 'yes' : 'no'));

        $generateLongPlaylist = isset($_GET['check-playlist-long-playlist']);
        printLog('Generate long playlist: '.($generateLongPlaylist ? 'yes' : 'no'));

        $artistsInSourcePlaylists = [];

        foreach ($selectedPlaylists as $selectedPlaylistId) {
            $playlist = $api->getPlaylist($selectedPlaylistId);
            printLog('Will get recommendations from tracks in playlist "'.$playlist->name.'".');
            $playlistTracks = $playlist->tracks->items;
            printLog('Found '.count($playlistTracks).' tracks.');
            foreach ($playlistTracks as $track) {
                $artists = [];
                foreach ($track->track->artists as $artist) {
                    $artists[] = $artist->name;
                    $artistsInSourcePlaylists[$artist->id] = 1;
                }
                printLog('Track "'.$track->track->name.'" ('.join(', ', $artists).')');

                $recommendations = $api->getRecommendations([
                  'seed_tracks' => [$track->track->id],
                  'limit' => ($generateLongPlaylist ? 50 : 30)
              ]);
                printLog(' -> Got '.count($recommendations->tracks).' recommendatations.');
                foreach ($recommendations->tracks as $recommendedTrack) {
                    $recommendedTrackIds[$recommendedTrack->id] = $recommendedTrack;
                }
            }
        }

        if ($shouldFilterByArtists) {
            $artistsInSourcePlaylists = array_keys($artistsInSourcePlaylists);
            printLog('Filter by artists found in source playlists ('.count($artistsInSourcePlaylists).')');

            $filteredTrackIds = [];
            foreach ($recommendedTrackIds as $trackId => $track) {
                $trackArtistInWantedArtists = false;
                foreach ($track->artists as $trackArtist) {
                    if (\in_array($trackArtist->id, $artistsInSourcePlaylists)) {
                        $filteredTrackIds[$track->id] = 1;
                    }
                }
            }
            $recommendedTrackIds = $filteredTrackIds;
        }

        $newPlaylist = createPlaylistWithRandomTracks(
            $api,
            $recommendedTrackIds,
            $generateLongPlaylist ? $tracksCountInLongPlaylist : $tracksCountInShortPlaylist
        );
        $templateData['infos'][] = getCreatedPlaylistInformationMessage($api, $newPlaylist);
        break;

    case 'generate-playlist-from-selected-top-artists':
        $selectedArtists = $_GET['selected-artist'];
        printLog('Will create new playlist with filterted recommendations from artists: '.join(', ', $selectedArtists).'".');
        $recommendedTrackIds = [];

        $shouldFilterByArtists = isset($_GET['check-top-artist-filter-artists']);
        printLog('Filter by artists in selection: '.($shouldFilterByArtists ? 'yes' : 'no'));

        $generateLongPlaylist = isset($_GET['check-top-artist-long-playlist']);
        printLog('Generate long playlist: '.($generateLongPlaylist ? 'yes' : 'no'));

        foreach ($selectedArtists as $selectedArtist) {
            printLog('Get recommendations for artist '.$selectedArtist.'');
            $recommendations = $api->getRecommendations([
                'seed_artists' => $selectedArtist,
                'limit' => 100
            ]);
            printLog(' -> Got '.count($recommendations->tracks).' recommendatations.');

            // Filter by artist if requested, remove duplicates
            foreach ($recommendations->tracks as $recommendedTrack) {
                if ($shouldFilterByArtists) {
                    $trackArtistInWantedArtists = false;
                    foreach ($recommendedTrack->artists as $trackArtist) {
                        if (\in_array($trackArtist->id, $selectedArtists)) {
                            $recommendedTrackIds[$recommendedTrack->id] = 1;
                        }
                    }
                } else {
                    $recommendedTrackIds[$recommendedTrack->id] = 1;
                }
            }
        }

        $newPlaylist = createPlaylistWithRandomTracks(
            $api,
            $recommendedTrackIds,
            $generateLongPlaylist ? $tracksCountInLongPlaylist : $tracksCountInShortPlaylist
        );
        $templateData['infos'][] = getCreatedPlaylistInformationMessage($api, $newPlaylist);
        break;

    case 'generate-playlist-from-random-top-artists':
        $countInTopArtists = random_int(4, 6);
        $countInLessTopArtists = random_int(4, 6);
        $limitBetweenTopAndLessTop = $topArtistsCount;
        $selectedArtists = getRandomArtistsFromTopArtists(
            $api,
            $countInTopArtists,
            $countInLessTopArtists,
            $limitBetweenTopAndLessTop
        );
        printLog('Will create new playlist with filterted recommendations from random artists: '.join(', ', $selectedArtists).'".');
        $recommendedTrackIds = [];

        $shouldFilterByArtists = isset($_GET['check-top-artist-filter-artists']);
        printLog('Filter by artists in selection: '.($shouldFilterByArtists ? 'yes' : 'no'));

        $generateLongPlaylist = isset($_GET['check-top-artist-long-playlist']);
        printLog('Generate long playlist: '.($generateLongPlaylist ? 'yes' : 'no'));

        foreach ($selectedArtists as $selectedArtist) {
            printLog('Get recommendations for artist '.$selectedArtist.'');
            $recommendations = $api->getRecommendations([
                'seed_artists' => $selectedArtist,
                'limit' => 100
            ]);
            printLog(' -> Got '.count($recommendations->tracks).' recommendations.');

            // Filter by artist if requested, remove duplicates
            foreach ($recommendations->tracks as $recommendedTrack) {
                if ($shouldFilterByArtists) {
                    $trackArtistInWantedArtists = false;
                    foreach ($recommendedTrack->artists as $trackArtist) {
                        if (\in_array($trackArtist->id, $selectedArtists)) {
                            $recommendedTrackIds[$recommendedTrack->id] = 1;
                        }
                    }
                } else {
                    $recommendedTrackIds[$recommendedTrack->id] = 1;
                }
            }
        }

        $newPlaylist = createPlaylistWithRandomTracks(
            $api,
            $recommendedTrackIds,
            $generateLongPlaylist ? $tracksCountInLongPlaylist : $tracksCountInShortPlaylist
        );
        $templateData['infos'][] = getCreatedPlaylistInformationMessage($api, $newPlaylist);
        break;

    case 'generate-playlist-from-daily-mixes':
        $generateLongPlaylist = isset($_GET['check-quick-create-long-playlist']);

        printLog('Generate playlist from Daily Mixes (long playlist :'.($generateLongPlaylist ? 'yes' : 'no').')');

        $newPlaylist = createPlaylistFromDailyMixesTracks(
            $api,
            $generateLongPlaylist ? $tracksCountInLongPlaylist : $tracksCountInShortPlaylist
        );
        $templateData['infos'][] = getCreatedPlaylistInformationMessage($api, $newPlaylist);
        break;

    case 'generate-playlist-tambouille-mix':
        $generateLongPlaylist = isset($_GET['check-quick-create-long-playlist']);

        printLog('Generate tambouille mix playlist (long playlist :'.($generateLongPlaylist ? 'yes' : 'no').')');

        $newPlaylist = createPlaylistTambouilleMix(
            $api,
            $generateLongPlaylist ? $tracksCountInLongPlaylist : $tracksCountInShortPlaylist
        );
        $templateData['infos'][] = getCreatedPlaylistInformationMessage($api, $newPlaylist);
        break;

    case 'show-playlist-content':
        printLog('Get content of playlist');
        $playlistId = $_GET['id'];
        $playlist = $api->getPlaylist($playlistId);
        $templateData['infos'][] = getPlaylistInformationMessage($api, $playlist);
        $templateData['playlist'] = createDisplayablePlaylist($playlist);
        break;

    default:
        $templateData['topArtists'] = $api->getMyTop('artists', ['limit' => $topArtistsCount, 'time_range' => 'short_term'])->items;
        $templateData['playlists'] = $api->getUserPlaylists($user['id'], ['limit' => $playlistsCount])->items;
        break;
}

require '../template.php';