Issue 9305: Relay deny tags are added

src/Module/Admin/Site.php

@@ -214,6 +214,7 @@ class Site extends BaseAdmin
 		$relay_subscribe   = !empty($_POST['relay_subscribe']);
 		$relay_scope       = (!empty($_POST['relay_scope'])       ? Strings::escapeTags(trim($_POST['relay_scope']))        : '');
 		$relay_server_tags = (!empty($_POST['relay_server_tags']) ? Strings::escapeTags(trim($_POST['relay_server_tags']))  : '');
+		$relay_deny_tags   = (!empty($_POST['relay_deny_tags'])   ? Strings::escapeTags(trim($_POST['relay_deny_tags']))    : '');
 		$relay_user_tags   = !empty($_POST['relay_user_tags']);
 		$active_panel      = (!empty($_POST['active_panel'])      ? "#" . Strings::escapeTags(trim($_POST['active_panel'])) : '');
 
@@ -425,6 +426,7 @@ class Site extends BaseAdmin
 		DI::config()->set('system', 'relay_subscribe'  , $relay_subscribe);
 		DI::config()->set('system', 'relay_scope'      , $relay_scope);
 		DI::config()->set('system', 'relay_server_tags', $relay_server_tags);
+		DI::config()->set('system', 'relay_deny_tags'  , $relay_deny_tags);
 		DI::config()->set('system', 'relay_user_tags'  , $relay_user_tags);
 
 		DI::config()->set('system', 'rino_encrypt'     , $rino);
@@ -696,6 +698,7 @@ class Site extends BaseAdmin
 			'$relay_directly'         => ['relay_directly', DI::l10n()->t('Direct relay transfer'), DI::config()->get('system', 'relay_directly'), DI::l10n()->t('Enables the direct transfer to other servers without using the relay servers')],
 			'$relay_scope'            => ['relay_scope', DI::l10n()->t('Relay scope'), DI::config()->get('system', 'relay_scope'), DI::l10n()->t('Can be "all" or "tags". "all" means that every public post should be received. "tags" means that only posts with selected tags should be received.'), ['' => DI::l10n()->t('Disabled'), 'all' => DI::l10n()->t('all'), 'tags' => DI::l10n()->t('tags')]],
 			'$relay_server_tags'      => ['relay_server_tags', DI::l10n()->t('Server tags'), DI::config()->get('system', 'relay_server_tags'), DI::l10n()->t('Comma separated list of tags for the "tags" subscription.')],
+			'$relay_deny_tags'        => ['relay_deny_tags', DI::l10n()->t('Deny Server tags'), DI::config()->get('system', 'relay_deny_tags'), DI::l10n()->t('Comma separated list of tags that are rejected.')],
 			'$relay_user_tags'        => ['relay_user_tags', DI::l10n()->t('Allow user tags'), DI::config()->get('system', 'relay_user_tags'), DI::l10n()->t('If enabled, the tags from the saved searches will used for the "tags" subscription in addition to the "relay_server_tags".')],
 
 			'$form_security_token'    => self::getFormSecurityToken('admin_site'),

src/Protocol/ActivityPub/Processor.php

@@ -810,11 +810,6 @@ class Processor
 			$scope = SR_SCOPE_NONE;
 		}
 
-		if ($scope == SR_SCOPE_ALL) {
-			Logger::info('Server accept all posts - accepted', ['id' => $id]);
-			return true;
-		}
-
 		$replyto = JsonLD::fetchElement($activity['as:object'], 'as:inReplyTo', '@id');
 		if (Item::exists(['uri' => $replyto])) {
 			Logger::info('Post is a reply to an existing post - accepted', ['id' => $id, 'replyto' => $replyto]);
@@ -839,11 +834,11 @@ class Processor
 
 		$systemTags = [];
 		$userTags = [];
+		$denyTags = [];
 
 		if ($scope == SR_SCOPE_TAGS) {
-			$server_tags = $config->get('system', 'relay_server_tags', []);
+			$server_tags = $config->get('system', 'relay_server_tags');
 			$tagitems = explode(',', mb_strtolower($server_tags));
-
 			foreach ($tagitems AS $tag) {
 				$systemTags[] = trim($tag, '# ');
 			}
@@ -853,14 +848,29 @@ class Processor
 			}
 		}
 
+		$tagList = array_unique(array_merge($systemTags, $userTags));
+
+		$deny_tags = $config->get('system', 'relay_deny_tags');
+		$tagitems = explode(',', mb_strtolower($deny_tags));
+		foreach ($tagitems AS $tag) {
+			$tag = trim($tag, '# ');
+			$denyTags[] = $tag;
+		}
+
+		if (!empty($tagList) || !empty($denyTags)) {
 			$content = mb_strtolower(BBCode::toPlaintext(HTML::toBBCode(JsonLD::fetchElement($activity['as:object'], 'as:content', '@value')), false));
 
-		$tagList = array_unique(array_merge($systemTags, $userTags));
 			foreach ($messageTags as $tag) {
+				if (in_array($tag, $denyTags)) {
+					Logger::info('Unwanted hashtag found - rejected', ['id' => $id, 'hashtag' => $tag]);
+					return false;
+				}
+
 				if (in_array($tag, $tagList)) {
 					Logger::info('Subscribed hashtag found - accepted', ['id' => $id, 'hashtag' => $tag]);
 					return true;
 				}
+
 				// We check with "strpos" for performance issues. Only when this is true, the regular expression check is used
 				// RegExp is taken from here: https://medium.com/@shiba1014/regex-word-boundaries-with-unicode-207794f6e7ed
 				if ((strpos($content, $tag) !== false) && preg_match('/(?<=[\s,.:;"\']|^)' . preg_quote($tag, '/') . '(?=[\s,.:;"\']|$)/', $content)) {
@@ -868,6 +878,12 @@ class Processor
 					return true;
 				}
 			}
+		}
+
+		if ($scope == SR_SCOPE_ALL) {
+			Logger::info('Server accept all posts - accepted', ['id' => $id]);
+			return true;
+		}
 
 		Logger::info('No matching hashtags found - rejected', ['id' => $id]);
 		return false;

view/templates/admin/site.tpl

@@ -133,6 +133,7 @@
 		{{include file="field_checkbox.tpl" field=$relay_directly}}
 		{{include file="field_select.tpl" field=$relay_scope}}
 		{{include file="field_input.tpl" field=$relay_server_tags}}
+		{{include file="field_input.tpl" field=$relay_deny_tags}}
 		{{include file="field_checkbox.tpl" field=$relay_user_tags}}
 
 		<div class="submit"><input type="submit" name="page_site" value="{{$submit}}"/></div>

view/theme/frio/templates/admin/site.tpl

@@ -307,6 +307,7 @@
 						{{include file="field_checkbox.tpl" field=$relay_directly}}
 						{{include file="field_select.tpl" field=$relay_scope}}
 						{{include file="field_input.tpl" field=$relay_server_tags}}
+						{{include file="field_input.tpl" field=$relay_deny_tags}}
 						{{include file="field_checkbox.tpl" field=$relay_user_tags}}
 					</div>
 					<div class="panel-footer">