test

lib/utils.ts

@@ -15,11 +15,12 @@ export function toArray<T>(input?: T | T[] | null): T[] {
 }
 
 export function toTitleCase(str?: string) {
-  if (!str) return '';
-  return str.replace(
-    /\w\S*/g,
-    (text: string) =>
-      text.charAt(0).toUpperCase() + text.substring(1).toLowerCase(),
+  return (
+    str
+      ?.toLowerCase()
+      .replace(/[^-'’\s]+/g, (match) =>
+        match.replace(/^./, (first) => first.toUpperCase()),
+      ) ?? ""
   );
 }
 
@@ -40,8 +41,12 @@ export function sortByDate<T>(
 
 export const bmiFromMetric = (kg: number, cm: number) => {
   const m = cm / 100;
-  const bmi = kg / (m * m);
-  return bmi ? Math.round(bmi) : NaN;
+  const m2 = m * m;
+  if (m2 === 0) {
+    return null;
+  }
+  const bmi = kg / m2;
+  return !Number.isNaN(bmi) ? Math.round(bmi) : null;
 };
 
 export function getBmiStatus(
@@ -58,7 +63,9 @@ export function getBmiStatus(
     ) || null;
   const bmi = bmiFromMetric(params.weight, params.height);
 
-  if (!thresholdByAge || Number.isNaN(bmi)) return null;
+  if (!thresholdByAge || bmi === null) {
+    return null;
+  }
 
   if (bmi > thresholdByAge.obesity_min) return BmiCategory.OBESE;
   if (bmi > thresholdByAge.strong_min) return BmiCategory.VERY_OVERWEIGHT;