Saddlegallmidge form idec 372

ipmd/static/ipmd/js/ipmdlib.js

@@ -154,7 +154,17 @@ async function getStationWeatherData(endpoint, weatherStationId, parameters, int
         + "&weatherStationId=" + weatherStationId
         + "&parameters=" + parameters.join(",")
         );
-    return await response.json();
+
+        if(response.status == 200)
+        {
+            return await response.json();
+        }
+        else 
+        {
+            let errorMessage = "No weather data was returned. Message from the data source was: \n\n" + await response.text();
+            alert(errorMessage);
+            return null;
+        }
 }
 
 /**
@@ -177,7 +187,18 @@ async function getLocationWeatherData(endpoint, longitude, latitude, parameters,
         + "&latitude="         + latitude
         + "&parameters=" + parameters.join(",")
         );
-    return (response.status == 200) ? await response.json() : null;
+
+    if(response.status == 200)
+    {
+        return await response.json();
+    }
+    else 
+    {
+        let errorMessage = "No weather data was returned. Message from the data source was: \n\n" + await response.text();
+        alert(errorMessage);
+        return null;
+    }
+    
 }
 
 /**
@@ -500,13 +521,13 @@ function getUnix(aDate)
 }
 
 /**
- * Saves a bit of typing. Currently checks if the val is either undefined or null
+ * Saves a bit of typing. Currently checks if the val is either undefined or null, and if a string == ""
  * @param {Object} val 
  * @returns {Boolean} true if the value is considered empty
  */
 function isEmpty(val)
 {
-    return val === undefined || val === null;
+    return val === undefined || val === null || (typeof val === "string" && val.trim() == "");
 }
 
 // Keeping track of maps