add genre recommendation feature

app/src/main/java/musicbot/Listeners.java

@@ -1,21 +1,22 @@
 package musicbot;
 
-import net.dv8tion.jda.api.entities.Guild;
+import net.dv8tion.jda.api.JDA;
 import net.dv8tion.jda.api.events.ReadyEvent;
 import net.dv8tion.jda.api.hooks.ListenerAdapter;
 import net.dv8tion.jda.api.interactions.commands.OptionType;
 import net.dv8tion.jda.api.interactions.commands.build.OptionData;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Objects;
-
 public class Listeners extends ListenerAdapter {
 
+
+
+
     @Override
     public void onReady(@NotNull final ReadyEvent event) {
-        //final Guild guildId = event.getJDA().getGuildById(1197770092243599431L);
+        final JDA jda = event.getJDA();
 
-        event.getJDA().upsertCommand("music", "find music to play").addOptions(
+        jda.upsertCommand("music", "find music to play").addOptions(
                 new OptionData(
                         OptionType.STRING,
                         "title",
@@ -28,13 +29,19 @@ public class Listeners extends ListenerAdapter {
                         true)
         ).queue();
 
-        event.getJDA().upsertCommand("recommend", "find recommendations for music").addOptions(
+        jda.upsertCommand("recommend", "find recommendations for music").addOptions(
                 new OptionData(
                         OptionType.STRING,
                         "artist",
-                        "The name of artist you like",
-                        true
+                        "Find other songs and artists based on an artist you like"
+                ),
+                new OptionData(
+                        OptionType.STRING,
+                        "genre",
+                        "Find other songs and artists based on a genre you like"
                 )
         ).queue();
+
+        jda.upsertCommand("genres", "find recommendations for music").queue();
     }
 }

app/src/main/java/musicbot/Main.java

@@ -1,5 +1,6 @@
 package musicbot;
 
+import musicbot.commands.Genres;
 import musicbot.commands.MusicVideo;
 import musicbot.commands.Recommend;
 import net.dv8tion.jda.api.JDA;
@@ -13,5 +14,6 @@ public class Main {
         jda.addEventListener(new Listeners());
         jda.addEventListener(new MusicVideo());
         jda.addEventListener(new Recommend());
+        jda.addEventListener(new Genres());
     }
 }

app/src/main/java/musicbot/SpotifyClient.java

@@ -1,20 +1,18 @@
 package musicbot;
 
 import com.google.common.collect.ImmutableList;
-import com.neovisionaries.i18n.CountryCode;
 import org.apache.hc.core5.http.ParseException;
 import se.michaelthelin.spotify.SpotifyApi;
 import se.michaelthelin.spotify.exceptions.SpotifyWebApiException;
 import se.michaelthelin.spotify.model_objects.credentials.ClientCredentials;
-import se.michaelthelin.spotify.model_objects.special.SearchResult;
 import se.michaelthelin.spotify.model_objects.specification.Artist;
 import se.michaelthelin.spotify.model_objects.specification.Paging;
 import se.michaelthelin.spotify.model_objects.specification.Recommendations;
 import se.michaelthelin.spotify.model_objects.specification.Track;
 import se.michaelthelin.spotify.requests.authorization.client_credentials.ClientCredentialsRequest;
 import se.michaelthelin.spotify.requests.data.browse.GetRecommendationsRequest;
-import se.michaelthelin.spotify.requests.data.search.SearchItemRequest;
 import se.michaelthelin.spotify.requests.data.search.simplified.SearchArtistsRequest;
+import se.michaelthelin.spotify.requests.data.browse.miscellaneous.GetAvailableGenreSeedsRequest;
 
 import java.io.IOException;
 import java.util.Arrays;
@@ -37,29 +35,34 @@ public class SpotifyClient {
     }
 
     public Optional<Artist> findArtist(final String artist) {
-        final SearchArtistsRequest searchItemRequest = SPOTIFY_API.searchArtists(artist)
-                .market(CountryCode.US)
-                .limit(1)
-                .build();
-
         try {
             final SearchArtistsRequest searchArtistsRequest = SPOTIFY_API.searchArtists(artist)
                     .limit(1)
                     .build();
 
             final Paging<Artist> artists  = searchArtistsRequest.execute();
+
             return Arrays.stream(artists.getItems()).findFirst();
         } catch (SpotifyWebApiException | ParseException | IOException exception) {
             return Optional.empty();
         }
     }
 
-    public List<Track> findRecommendations(final String artistId) {
-        System.out.println("getting recommendations");
-        final GetRecommendationsRequest recommendationsRequest = SPOTIFY_API.getRecommendations()
-                .seed_artists(artistId)
-                .limit(5)
-                .build();
+    public List<Track> findRecommendations(final String artistId, final String genres) {
+        final GetRecommendationsRequest.Builder recommendationsRequestBuilder = SPOTIFY_API.getRecommendations()
+                .limit(5);
+
+        if (!artistId.isEmpty()) {
+            recommendationsRequestBuilder
+                    .seed_artists(artistId);
+        }
+
+        if (!genres.isEmpty()) {
+            recommendationsRequestBuilder
+                    .seed_genres(genres);
+        }
+
+        final GetRecommendationsRequest recommendationsRequest = recommendationsRequestBuilder.build();
 
         try {
             final Recommendations recommendations = recommendationsRequest.execute();
@@ -72,6 +75,18 @@ public class SpotifyClient {
         }
     }
 
+    public List<String> findGenres() {
+        final GetAvailableGenreSeedsRequest request = SPOTIFY_API.getAvailableGenreSeeds().build();
+
+        try {
+            final String[] genres = request.execute();
+            return Arrays.stream(genres).collect(Collectors.toList());
+        } catch (IOException | SpotifyWebApiException | ParseException e) {
+            System.out.println("Error: " + e.getMessage());
+            return ImmutableList.of();
+        }
+    }
+
     private static void clientCredentialsSync() {
         try {
             final ClientCredentials clientCredentials = CLIENT_CREDENTIALS_REQUEST.execute();

app/src/main/java/musicbot/commands/Genres.java

@@ -0,0 +1,32 @@
+package musicbot.commands;
+
+import com.google.common.collect.Lists;
+import musicbot.SpotifyClient;
+import net.dv8tion.jda.api.EmbedBuilder;
+import net.dv8tion.jda.api.entities.MessageEmbed;
+import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class Genres extends ListenerAdapter {
+    @Override
+    public void onSlashCommandInteraction(@NotNull SlashCommandInteractionEvent event) {
+        if (!event.getName().equals("genres")) return;
+
+        final SpotifyClient spotifyClient = new SpotifyClient();
+        final List<String> genres = spotifyClient.findGenres();
+
+        final List<List<String>> batches = Lists.partition(genres, 20);
+
+        final List<MessageEmbed> embeds = batches.stream().map(genresList -> {
+            final EmbedBuilder eb = new EmbedBuilder();
+            genresList.forEach(genre -> eb.addField(genre, "", false));
+            return eb.build();
+        }).collect(Collectors.toList());
+
+        event.getChannel().sendMessageEmbeds(embeds).queue();
+    }
+}

app/src/main/java/musicbot/commands/Recommend.java

@@ -1,18 +1,17 @@
 package musicbot.commands;
 
 import musicbot.SpotifyClient;
+import net.dv8tion.jda.api.EmbedBuilder;
+import net.dv8tion.jda.api.entities.MessageEmbed;
 import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
-import net.dv8tion.jda.api.utils.MiscUtil;
+import net.dv8tion.jda.api.interactions.commands.OptionMapping;
 import net.dv8tion.jda.api.hooks.ListenerAdapter;
-import net.dv8tion.jda.api.utils.messages.MessageCreateData;
 import org.jetbrains.annotations.NotNull;
 import se.michaelthelin.spotify.model_objects.specification.Artist;
-import se.michaelthelin.spotify.model_objects.specification.Recommendations;
+import se.michaelthelin.spotify.model_objects.specification.ArtistSimplified;
 import se.michaelthelin.spotify.model_objects.specification.Track;
 
-import java.util.List;
-import java.util.Objects;
-import java.util.Optional;
+import java.util.*;
 import java.util.stream.Collectors;
 
 public class Recommend extends ListenerAdapter {
@@ -21,18 +20,65 @@ public class Recommend extends ListenerAdapter {
     public void onSlashCommandInteraction(@NotNull final SlashCommandInteractionEvent event) {
         if (!event.getName().equals("recommend")) return;
 
-        final String artist = Objects.requireNonNull(event.getOption("artist")).getAsString();
+        event.deferReply().queue();
+
+        final OptionMapping artistInput = event.getOption("artist");
+        final OptionMapping genreInput = event.getOption("genre");
+
+        final Optional<String> maybeArtistId = findArtistId(artistInput);
+        final Optional<String> maybeGenre = findGenre(genreInput);
+
         final SpotifyClient spotifyClient = new SpotifyClient();
-        final Optional<Artist> maybeArtist = spotifyClient.findArtist(artist);
 
-        if (maybeArtist.isPresent()) {
-            final String artistId = maybeArtist.get().getId();
-            final List<String> tracks = spotifyClient.findRecommendations(artistId).stream().map(track -> track.getName()).collect(Collectors.toList());
-            final String message = String.join(", ", tracks);/**/
+        final String artistId = maybeArtistId.orElse("");
+        final String genre = maybeGenre.orElse("");
+        final List<Track> tracks = spotifyClient.findRecommendations(artistId, genre);
+
+        final EmbedBuilder eb = new EmbedBuilder();
+        if (!tracks.isEmpty()) {
+
+            eb
+                    .setTitle("Recommendations")
+                    .setDescription("Here are a list of recommendations based on your input. " +
+                            "It will help you find new music to listen to.");
 
-            event.reply(message).queue();
+            tracks.forEach(track -> {
+                List<String> trackArtists = Arrays.stream(track.getArtists())
+                        .map(ArtistSimplified::getName)
+                        .collect(Collectors.toList());
+                String artists = String.join(", ", trackArtists);
+
+                eb.addField(track.getName(), artists, false);
+            });
+
+            MessageEmbed embed = eb.build();
+
+            event.getHook().sendMessageEmbeds(embed).queue();
         } else {
-            event.reply("Sorry, I can't find any recommendations.").queue();
+            eb.setTitle("No recommendations found");
+            final MessageEmbed embed = eb.build();
+
+            event.getHook().sendMessageEmbeds(embed).queue();
+        }
+
+    }
+
+    private Optional<String> findArtistId(final OptionMapping artistInput) {
+        if (artistInput == null) {
+            return Optional.empty();
+        }
+
+        final SpotifyClient spotifyClient = new SpotifyClient();
+        final Optional<Artist> maybeArtist = spotifyClient.findArtist(artistInput.getAsString());
+
+        return maybeArtist.map(Artist::getId);
     }
+
+    private Optional<String> findGenre(final OptionMapping genreInput) {
+        if (genreInput == null) {
+            return Optional.empty();
+        }
+
+        return Optional.of(genreInput.getAsString());
     }
 }