initial implementation of request delay balancer

js/request_balancer.js

@@ -0,0 +1,18 @@
+function request_delay_balancer(refresh_period) {
+    this.balance_to = refresh_period;
+    this.request_t = 0;
+    this.finished_t = 0;
+}
+
+request_delay_balancer.prototype.requested = function() {
+    this.request_t = millitime();
+};
+
+request_delay_balancer.prototype.finished = function() {
+    this.finished_t = millitime();
+};
+
+request_delay_balancer.prototype.estimate = function() {
+    var estimate = this.balance_to - (this.finished_t - this.request_t);
+    return (estimate > 0) ? estimate : 0;
+};

main.html

@@ -26,6 +26,7 @@
         <script type="text/javascript" src="./js/port_usage.js"></script>
         <script type="text/javascript" src="./js/serial.js"></script>
         <script type="text/javascript" src="./js/gui.js"></script>
+        <script type="text/javascript" src="./js/request_balancer.js"></script>
         <script type="text/javascript" src="./js/serial_backend.js"></script>
         <script type="text/javascript" src="./js/data_storage.js"></script>
         <script type="text/javascript" src="./js/msp.js"></script>

main.js

@@ -181,6 +181,12 @@ function microtime() {
     return now;
 }
 
+function millitime() {
+    var now = new Date().getTime();
+
+    return now;
+}
+
 /*
 function add_custom_spinners() {
     var spinner_element = '<div class="spinner"><div class="up"></div><div class="down"></div></div>';