WIP on user achievements

* Hook up events for testing
* Start to plug in experimental interrupt

core/database.js

@@ -189,6 +189,18 @@ const DB_INIT_TABLE = {
             );`
         );
 
+        dbs.user.run(
+            `CREATE TABLE IF NOT EXISTS user_achievement (
+                user_id             INTEGER NOT NULL,
+                achievement_tag     VARCHAR NOT NULL,
+                timestamp           DATETIME NOT NULL,
+                match_field         VARCHAR NOT NULL,
+                match_value         VARCHAR NOT NULL,
+                UNIQUE(user_id, achievement_tag, match_field, match_value),
+                FOREIGN KEY(user_id) REFERENCES user(id) ON DELETE CASCADE
+            );`
+        );
+
         return cb(null);
     },