Properly handles users asking for non-existent UUIDs

predict/ajax.php

@@ -1,5 +1,6 @@
 <?php
 require_once("includes/functions.inc.php");
+require_once("includes/config.inc.php");
 
 $action = $_GET['action'];
 
@@ -8,7 +9,9 @@ $software_available = array("gfs", "gfs_hd");
 switch($action) {
 case "getCSV":
     $uuid = $_GET['uuid'];
-    $fh = fopen("preds/".$uuid."/flight_path.csv", "r") or die("No CSV for UUID");
+    $tryfile = $c_preds_path.$uuid."/".$c_flight_csv;
+    if(!file_exists($tryfile)) return false;
+    $fh = fopen($tryfile, "r");
     $data = array();
     while (!feof($fh)) {
         $line = trim(fgets($fh));
@@ -20,7 +23,7 @@ case "getCSV":
 
 case "JSONexists":
     $uuid = $_GET['uuid'];
-    if(file_exists("preds/$uuid/progress.json")) {
+    if(file_exists($c_preds_path.$uuid."/".$c_progress_json)) {
         echo true;
     } else {
         echo false;
@@ -32,11 +35,11 @@ case "getModelByUUID":
     if( !uuid ) die ("No uuid given to getModelByUUID");
     // make a new model
     $pred_model = array();
-    if ( !file_exists("preds/".$uuid."/scenario.ini") ) {
+    if ( !file_exists($c_preds_path.$uuid."/".$c_scenario_file) ) {
         $pred_model['valid'] = false;
     } else {
         // populate the array, JSON encode it and return
-        $pred_model = parse_ini_file("preds/".$uuid."/scenario.ini");
+        $pred_model = parse_ini_file($c_preds_path.$uuid."/".$c_scenario_file);
         if ( verifyModel($pred_model, $software_available) ){
             $pred_model['valid'] == true;
         } else {

predict/css/pred.css

@@ -34,7 +34,6 @@ a { text-decoration: underline; color: #333; cursor: pointer; }
     left: 50%;
     top: 50%;
     width: 400px;
-    height: 50px;
     margin-left: -200px;
     margin-top: -50px;
     padding: 1em;

predict/includes/config.inc.php

@@ -0,0 +1,9 @@
+<?php
+
+$c_preds_path = "preds/";
+
+$c_scenario_file = "scenario.ini";
+$c_flight_csv = "flight_path.csv";
+$c_progress_json = "progress.json";
+
+?>

predict/js/pred.js

@@ -73,13 +73,19 @@ function handlePred(pred_uuid) {
 
 function getCSV(pred_uuid) {
     $.get("ajax.php", { "action":"getCSV", "uuid":pred_uuid }, function(data) {
-        appendDebug("Got JSON response from server for flight path, parsing...");
-        if (parseCSV(data) ) {
-            appendDebug("Parsing function returned successfully.");
-            appendDebug("Done, AJAX functions quitting.");
-        } else {
-            appendDebug("The parsing function failed.");
-        }
+            if(data != null) {
+                appendDebug("Got JSON response from server for flight path, parsing...");
+                if (parseCSV(data) ) {
+                    appendDebug("Parsing function returned successfully.");
+                    appendDebug("Done, AJAX functions quitting.");
+                } else {
+                    appendDebug("The parsing function failed.");
+                }
+            } else {
+                appendDebug("Server couldn't find a CSV for that UUID");
+                throwError("Sorry, we couldn't find the data for that UUID. "+
+                    "Please run another prediction.");
+            }
     }, 'json');
 }