Add the /surprise command

Author: TechnoVisionDev

src/main/java/technobot/commands/CommandRegistry.java

@@ -51,6 +51,7 @@ public CommandRegistry(TechnoBot bot) {
                 new EightBallCommand(bot),
                 new GoogleCommand(bot),
                 new RedditCommand(bot),
+                new SurpriseCommand(bot),
 
                 //Leveling commands
                 new RankCommand(bot),

src/main/java/technobot/commands/fun/EightBallCommand.java

@@ -53,7 +53,7 @@ public void execute(SlashCommandInteractionEvent event) {
             return;
         }
 
-        int index = ThreadLocalRandom.current().nextInt(14);
+        int index = ThreadLocalRandom.current().nextInt(responses.size());
         EmbedBuilder embed = new EmbedBuilder()
                 .setColor(EmbedColor.DEFAULT.color)
                 .setTitle(question)

src/main/java/technobot/commands/fun/SurpriseCommand.java

@@ -0,0 +1,68 @@
+package technobot.commands.fun;
+
+import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
+import okhttp3.Call;
+import okhttp3.Callback;
+import okhttp3.Request;
+import okhttp3.Response;
+import technobot.TechnoBot;
+import technobot.commands.Category;
+import technobot.commands.Command;
+import technobot.util.embeds.EmbedUtils;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.ThreadLocalRandom;
+
+/**
+ * Command that generates a link from uselessweb.
+ *
+ * @author TechnoVision
+ */
+public class SurpriseCommand extends Command {
+
+    public SurpriseCommand(TechnoBot bot) {
+        super(bot);
+        this.name = "surprise";
+        this.description = "Get a fun and unique surprise.";
+        this.category = Category.FUN;
+    }
+
+    @Override
+    public void execute(SlashCommandInteractionEvent event) {
+        event.deferReply().queue();
+        Request request = new Request.Builder()
+                .url("https://gist.githubusercontent.com/quest/07bbc6908f84b50a9fc8/raw/d8983a0723d07203816b78953ff52f07423c808d/uselessweb.json")
+                .build();
+
+        // Asynchronous API call
+        bot.httpClient.newCall(request).enqueue(new Callback() {
+            @Override
+            public void onFailure(Call call, IOException e) {
+                String text = "I was unable to fetch any surprises!";
+                event.getHook().sendMessageEmbeds(EmbedUtils.createError(text)).queue();
+            }
+
+            @Override
+            public void onResponse(Call call, final Response response) throws IOException {
+                if (!response.isSuccessful()) throw new IOException();
+                SiteList entity = bot.gson.fromJson(response.body().string(), SiteList.class);
+                int index = ThreadLocalRandom.current().nextInt(entity.uselessweb.size());
+                event.getHook().sendMessage(entity.uselessweb.get(index)).queue();
+            }
+        });
+    }
+
+    /**
+     * Represents a joke retrieved from the joke api.
+     * Used by OkHttp and Gson to convert JSON to java code.
+     */
+    private class SiteList {
+
+        public List<String> uselessweb;
+
+        public SiteList(List<String> uselessweb) {
+             this.uselessweb = uselessweb;
+        }
+    }
+}