Introduced ForumPoster

Allows easier access & management of forum posting. See #1307

Author: discorddioxin

application/src/main/java/org/togetherjava/tjbot/features/utils/ForumPoster.java

@@ -0,0 +1,52 @@
+package org.togetherjava.tjbot.features.utils;
+
+import net.dv8tion.jda.api.JDA;
+import net.dv8tion.jda.api.entities.channel.concrete.ForumChannel;
+import net.dv8tion.jda.api.entities.channel.concrete.ThreadChannel;
+import net.dv8tion.jda.api.requests.restaction.ForumPostAction;
+import net.dv8tion.jda.api.requests.restaction.MessageCreateAction;
+import net.dv8tion.jda.api.utils.messages.MessageCreateData;
+
+import java.util.*;
+
+public final class ForumPoster {
+    private final JDA jda;
+
+    private ForumPoster(JDA jda) {
+        this.jda = jda;
+    }
+
+    public static ForumPoster using(JDA jda) {
+        return new ForumPoster(jda);
+    }
+
+    private ForumChannel findForumChannel(String channelId) {
+        return Optional.ofNullable(jda.getForumChannelById(channelId))
+            .orElseThrow(() -> new IllegalStateException(
+                    "Did not find a forum channel with ID %s while trying to create a forum post. Make sure the config is setup properly."));
+    }
+
+    private ThreadChannel findForumPost(String postId) {
+        return Optional.ofNullable(jda.getThreadChannelById(postId))
+            .orElseThrow(() -> new IllegalStateException(
+                    "Did not find the forum post with ID %s while trying to reply to a post. Make sure the config is setup properly."));
+
+    }
+
+    public MessageCreateAction sendPost(String postId, MessageCreateData messageData) {
+        return sendPost(findForumPost(postId), messageData);
+    }
+
+    public MessageCreateAction sendPost(ThreadChannel post, MessageCreateData messageData) {
+        return post.sendMessage(messageData);
+    }
+
+    public ForumPostAction createPost(String channelId, String title, MessageCreateData message) {
+        return createPost(findForumChannel(channelId), title, message);
+    }
+
+    public ForumPostAction createPost(ForumChannel channel, String title,
+            MessageCreateData message) {
+        return channel.createForumPost(title, message);
+    }
+}