diff -r abe0a561005e -r 831ecafd74c6 rust/chat_sanitizer/src/lib.rs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/chat_sanitizer/src/lib.rs	Thu Dec 27 23:43:54 2018 +0100
@@ -0,0 +1,25 @@
+pub mod bad_words;
+
+use unicode_skeleton::UnicodeSkeleton;
+
+#[derive(PartialEq, Debug)]
+enum Severity {
+    Pass,
+    Warn,
+    Silence,
+    Ban,
+}
+
+trait MessageChecker<T> {
+    fn check(&self, player_id: T, message: &str) -> Severity;
+    fn fix(&self, player_id: T, message: &str) -> Option<String> {
+        None
+    }
+}
+
+fn normalized_message(s: &str) -> String {
+    s.chars()
+        .flat_map(|c| c.to_lowercase())
+        .skeleton_chars()
+        .collect::<String>()
+}