1 files changed, 11 insertions, 0 deletions
diff --git a/lib/slack_markdown_sanitizer.rb b/lib/slack_markdown_sanitizer.rb
new file mode 100644
index 00000000000..df3bec1a3c8
--- /dev/null
+++ b/lib/slack_markdown_sanitizer.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module SlackMarkdownSanitizer
+  # Markup characters which are used for links in HTML, Markdown,
+  # and Slack "mrkdwn" syntax (`<http://example.com|Label>`).
+  UNSAFE_MARKUP_CHARACTERS = '<>[]|'
+
+  def self.sanitize(string)
+    string&.delete(UNSAFE_MARKUP_CHARACTERS)
+  end
+end