Added conditional sleep with minimum timeout

src/main/java/org/parabot/environment/api/utils/Time.java

@@ -53,6 +53,30 @@ public final class Time {
         return true;
     }
 
+    /**
+     * Sleeps until SleepCondition is valid, but with a minimum timeout.
+     *
+     * @param conn              the condition.
+     * @param timeout           the time in milliseconds before it stops sleeping.
+     * @param minimumTimeout    the minimum time to sleep.
+     *
+     * @return whether it ran successfully without timing out.
+     */
+    public static boolean sleep(SleepCondition conn, int timeout, int minimumTimeout) {
+        long start = System.currentTimeMillis();
+        while (!conn.isValid()) {
+            if (start + timeout < System.currentTimeMillis()) {
+                return false;
+            }
+            Time.sleep(50);
+        }
+        long t;
+        if((t = System.currentTimeMillis() - start) < minimumTimeout) {
+            Time.sleep((int)(minimumTimeout - t));
+        }
+        return true;
+    }
+
     /**
      * Gets current time in milliseconds
      *