--- /dev/null
+/*
+ * Sone - PostReplyProvider.java - Copyright © 2013–2016 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.database
+
+import com.google.common.base.Optional
+import net.pterodactylus.sone.data.PostReply
+
+/**
+ * Interface for objects that can provide [PostReply]s.
+ */
+interface PostReplyProvider {
+
+ fun getPostReply(id: String): Optional<PostReply>
+
+ /**
+ * Returns all replies for the given post, order ascending by time.
+ *
+ * @param postId The ID of the post to get all replies for
+ * @return All replies for the given post
+ */
+ fun getReplies(postId: String): List<PostReply>
+
+}