Added support of previous / next in replay

sql/backup.pgsql

@@ -3,9 +3,15 @@ DROP TABLE IF EXISTS arrowclicked CASCADE;
 DROP TABLE IF EXISTS coinclicked CASCADE;
 DROP TABLE IF EXISTS keyboardevent CASCADE;
 DROP TABLE IF EXISTS resetclicked CASCADE;
+DROP TABLE IF EXISTS previousnextclicked CASCADE;
 
 DROP TYPE IF EXISTS VECTOR3 CASCADE;
 DROP TYPE IF EXISTS CAMERA CASCADE;
+DROP TYPE IF EXISTS PREVIOUSNEXT CASCADE;
+
+CREATE TYPE PREVIOUSNEXT AS ENUM(
+    'p', 'n'
+);
 
 CREATE TYPE VECTOR3 AS(
     x FLOAT,
@@ -49,3 +55,11 @@ CREATE TABLE resetclicked(
     user_id SERIAL REFERENCES users (id),
     time TIMESTAMP DEFAULT NOW()
 );
+
+CREATE TABLE previousnextclicked(
+    id SERIAL PRIMARY KEY,
+    user_id SERIAL REFERENCES users (id),
+    previousnext PREVIOUSNEXT NOT NULL,
+    time TIMESTAMP DEFAULT NOW(),
+    camera CAMERA
+);