Parse tags from description

php/servers/servers-rooms.php

@@ -104,6 +104,33 @@
 				isset($languages[$room_identifier])
 				? $languages[$room_identifier]
 				: "";
+
+			$this->extract_tags_from_description();
+		}
+
+		private const DESCRIPTION_TAGS_SPECIFICATION = '/(#[^#()@., ]+(?:,?\s*|\s+|$))+\s*$/';
+
+		/**
+		 * Pre-processes SOGS data by treating description-trailing hashtags as room tags.
+		 */
+		function extract_tags_from_description() {
+			$matches = [];
+			if (!preg_match(CommunityRoom::DESCRIPTION_TAGS_SPECIFICATION, $this->description, $matches)) {
+				return;
+			}
+
+			$tag_specification = $matches[0];
+			$tags = preg_split("/,\s*|\s+/", $tag_specification);
+			if (!$tags) {
+				return;
+			}
+
+			// Remove pound sign prefixes
+			$tags = array_map(function (string $tag) {
+				return substr($tag, 1);
+			}, $tags);
+
+			$this->add_tags($tags);
 		}
 
 		/**