Add option to limit the maximum thread depth of comments

modules/comment/comment.controller.php

@@ -735,6 +735,17 @@ class CommentController extends Comment
 			$list_args->head = $parent->head;
 			$list_args->depth = $parent->depth + 1;
 
+			// Check max thread depth.
+			$comment_config = ModuleModel::getModulePartConfig('comment', $obj->module_srl);
+			if (isset($comment_config->max_thread_depth) && $comment_config->max_thread_depth > 0)
+			{
+				if ($list_args->depth + 1 > $comment_config->max_thread_depth)
+				{
+					$oDB->rollback();
+					return new BaseObject(-1, 'msg_exceeds_max_thread_depth');
+				}
+			}
+
 			// if the depth of comments is less than 2, execute insert.
 			if($list_args->depth < 2)
 			{
@@ -2041,6 +2052,7 @@ class CommentController extends Comment
 		{
 			$comment_config->comment_page_count = 10;
 		}
+		$comment_config->max_thread_depth = (int)Context::get('max_thread_depth') ?: 0;
 
 		$comment_config->default_page = Context::get('default_page');
 		if($comment_config->default_page !== 'first')

modules/comment/comment.model.php

@@ -246,6 +246,18 @@ class CommentModel extends Comment
 		return $result;
 	}
 
+	/**
+	 * Get comment depth.
+	 *
+	 * @param int $comment_srl
+	 * @return ?int
+	 */
+	public static function getCommentDepth(int $comment_srl): ?int
+	{
+		$output = executeQuery('comment.getCommentDepth', ['comment_srl' => $comment_srl]);
+		return isset($output->data->depth) ? (int)$output->data->depth : null;
+	}
+
 	/**
 	 * Get the total number of comments in corresponding with document_srl.
 	 * @param int $document_srl

modules/comment/lang/en.php

@@ -12,8 +12,11 @@ $lang->comment_default_page_first = 'First page';
 $lang->comment_default_page_last = 'Last page';
 $lang->about_comment_count = 'Set the number of comments to show on each page.';
 $lang->about_comment_page_count = 'Set the number of pagination links to show at the bottom.';
+$lang->max_thread_depth = 'Maximum Thread Depth';
+$lang->about_max_thread_depth = '0: Unlimited, 1: No replies, 2 or more: Allow replies';
 $lang->msg_cart_is_null = 'Please select an article to delete.';
 $lang->msg_checked_comment_is_deleted = '%d comment(s) is(are) successfully deleted.';
+$lang->msg_exceeds_max_thread_depth = 'You have exceeded the maximum thread depth. Please leave a reply elsewhere in the thread.';
 $lang->search_target_list['content'] = 'Content';
 $lang->search_target_list['user_id'] = 'ID';
 $lang->search_target_list['user_name'] = 'Name';

modules/comment/lang/ko.php

@@ -12,8 +12,11 @@ $lang->comment_default_page_first = '첫 페이지';
 $lang->comment_default_page_last = '마지막 페이지';
 $lang->about_comment_count = '댓글을 정해진 수 만큼만 표시하고, 그 이상일 경우 페이지 번호를 표시해서 이동할 수 있게 합니다.';
 $lang->about_comment_page_count = '하단에 표시할 페이지 링크 수를 설정할 수 있습니다.';
+$lang->max_thread_depth = '대댓글 최대 깊이';
+$lang->about_max_thread_depth = '0: 무제한, 1: 대댓글 금지, 2 이상: 대댓글 허용';
 $lang->msg_cart_is_null = '삭제할 글을 선택해주세요.';
 $lang->msg_checked_comment_is_deleted = '%d개의 댓글을 삭제했습니다.';
+$lang->msg_exceeds_max_thread_depth = '대댓글 최대 깊이를 초과했습니다. 다른 자리에 댓글을 남겨 주세요.';
 $lang->search_target_list['content'] = '내용';
 $lang->search_target_list['user_id'] = '아이디';
 $lang->search_target_list['user_name'] = '이름';

modules/comment/queries/getCommentDepth.xml

@@ -0,0 +1,11 @@
+<query id="getCommentDepth" action="select">
+    <tables>
+        <table name="comments_list" />
+    </tables>
+    <columns>
+        <column name="depth" />
+    </columns>
+    <conditions>
+        <condition operation="equal" column="comment_srl" var="comment_srl" notnull="notnull" />
+    </conditions>
+</query>

modules/comment/tpl/comment_module_config.html

@@ -19,6 +19,13 @@
 				<p class="x_help-inline">{$lang->about_comment_page_count}</p>
 			</div>
 		</div>
+		<div class="x_control-group">
+			<label for="max_thread_depth" class="x_control-label">{$lang->max_thread_depth}</label>
+			<div class="x_controls">
+				<input type="number" min="0" name="max_thread_depth" id="max_thread_depth" value="{$comment_config->max_thread_depth ?? ''}" />
+				<p class="x_help-inline">{$lang->about_max_thread_depth}</p>
+			</div>
+		</div>
 		<div class="x_control-group">
 			<label for="comment_count" class="x_control-label">{$lang->comment_default_page}</label>
 			<div class="x_controls">