ayanova/src/api/gzutil.js

@@ -179,6 +179,25 @@ export default {
     return true;
   },
   ///////////////////////////////
+  // ROUNDING
+  // //https://medium.com/swlh/how-to-round-to-a-certain-number-of-decimal-places-in-javascript-ed74c471c1b8
+  roundAccurately: function(number, decimalPlaces) {
+    if (!number || number == 0 || number == NaN) {
+      return number;
+    }
+    let wasNegative = number < 0;
+    if (wasNegative) {
+      number = Match.abs(number); //make sure it's positive because rounding negative numbers is weird in JS
+    }
+    number = Number(
+      Math.round(number + "e" + decimalPlaces) + "e-" + decimalPlaces
+    );
+    if (wasNegative) {
+      number = 0 - number;
+    }
+    return number;
+  },
+  ///////////////////////////////
   // CLEAN TAG NAME
   // Clean up a tag with same rules as server
   //

ayanova/src/api/locale.js

@@ -243,11 +243,47 @@ export default {
     }
     //instantiate a luxon date object from val which is assumed to be an iso string
     let dt = window.$gz.DateTime.fromISO(val);
+    if (!dt.isValid) {
+      console.error("locale::addMinutes, input not valid:", {
+        val: val,
+        dt: dt
+      });
+      return val;
+    }
     //add minutes
     dt = dt.plus({ minutes: minutes });
     return dt.toUTC().toString();
   },
   ///////////////////////////////////////////////
+  // parse UTC ISO 8601 strings, diff, return hours
+  //
+  diffHoursFromUTC8601String(start, stop) {
+    if (!start || start == "" || !stop == null || stop == "") {
+      return 0;
+    }
+    //instantiate a luxon date object from val which is assumed to be an iso string
+    const startDate = window.$gz.DateTime.fromISO(start);
+    if (!startDate.isValid) {
+      console.error("locale::diffHours, start not valid:", {
+        start: start,
+        startDate: startDate
+      });
+      return 0;
+    }
+    const stopDate = window.$gz.DateTime.fromISO(stop);
+    if (!stopDate.isValid) {
+      console.error("locale::diffHours, start not valid:", {
+        stop: stop,
+        stopDate: stopDate
+      });
+      return 0;
+    }
+    return window.$gz.util.roundAccurately(
+      stopDate.diff(startDate, "hours").toObject().hours,
+      2
+    );
+  },
+  ///////////////////////////////////////////////
   // Local now timestamp converted to timeZoneName
   // and output as ISO 8601
   //  (used to inform server of local client time)