Add the /reddit command

Author: TechnoVisionDev

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

@@ -50,6 +50,7 @@ public CommandRegistry(TechnoBot bot) {
                 new NsfwCommand(bot),
                 new EightBallCommand(bot),
                 new GoogleCommand(bot),
+                new RedditCommand(bot),
 
                 //Leveling commands
                 new RankCommand(bot),

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

@@ -0,0 +1,68 @@
+package technobot.commands.fun;
+
+import net.dv8tion.jda.api.EmbedBuilder;
+import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
+import net.dv8tion.jda.api.interactions.commands.OptionType;
+import net.dv8tion.jda.api.interactions.commands.build.OptionData;
+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.data.json.Post;
+import technobot.util.embeds.EmbedColor;
+import technobot.util.embeds.EmbedUtils;
+
+import java.io.IOException;
+
+/**
+ * Command that generates a post from various subreddits.
+ *
+ * @author TechnoVision
+ */
+public class RedditCommand extends Command {
+
+    public RedditCommand(TechnoBot bot) {
+        super(bot);
+        this.name = "reddit";
+        this.description = "Get a reddit post from various subreddits.";
+        this.category = Category.FUN;
+        this.args.add(new OptionData(OptionType.STRING, "category", "The subreddit to browse", true)
+                .addChoice("facepalm", "facepalm")
+                .addChoice("comic", "comics")
+                .addChoice("blacktwitter", "BlackPeopleTwitter")
+                .addChoice("foodporn", "foodporn"));
+    }
+
+    @Override
+    public void execute(SlashCommandInteractionEvent event) {
+        event.deferReply().queue();
+        String category = event.getOption("category").getAsString();
+        String url = "https://meme-api.herokuapp.com/gimme/" + category;
+
+        // Asynchronous API call
+        Request request = new Request.Builder().url(url).build();
+        bot.httpClient.newCall(request).enqueue(new Callback() {
+            @Override
+            public void onFailure(Call call, IOException e) {
+                String text = "I was unable to fetch any posts from that subreddit!";
+                event.getHook().sendMessageEmbeds(EmbedUtils.createError(text)).queue();
+            }
+
+            @Override
+            public void onResponse(Call call, final Response response) throws IOException {
+                if (!response.isSuccessful()) throw new IOException();
+                Post entity = bot.gson.fromJson(response.body().string(), Post.class);
+
+                EmbedBuilder embed = new EmbedBuilder()
+                        .setColor(EmbedColor.DEFAULT.color)
+                        .setTitle(entity.getTitle(), entity.getPostLink())
+                        .setImage(entity.getImageUrl())
+                        .setFooter(""+entity.getUpvotes(), Post.UPVOTE_EMOJI);
+                event.getHook().sendMessageEmbeds(embed.build()).queue();
+            }
+        });
+    }
+}