feat(dashboard, api): integrate BMI thresholds and enhance dashboard with health metrics

lib/types/bmi.ts

@@ -0,0 +1,7 @@
+export enum BmiCategory {
+  UNDER_WEIGHT = 'under_weight',
+  NORMAL = 'normal',
+  OVER_WEIGHT = 'over_weight',
+  VERY_OVERWEIGHT = 'very_overweight',
+  OBESE = 'obese',
+}

lib/utils.ts

@@ -1,6 +1,9 @@
+import { Database } from '@/packages/supabase/src/database.types';
 import { type ClassValue, clsx } from 'clsx';
 import { twMerge } from 'tailwind-merge';
 
+import { BmiCategory } from './types/bmi';
+
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
 }
@@ -19,11 +22,63 @@ export function toTitleCase(str?: string) {
   );
 }
 
-export function sortByDate<T>(a: T[] | undefined, key: keyof T): T[] | undefined {
+export function sortByDate<T>(
+  a: T[] | undefined,
+  key: keyof T,
+): T[] | undefined {
   return a?.sort((a, b) => {
     if (!a[key] || !b[key]) {
       return 0;
     }
-    return new Date(b[key] as string).getTime() - new Date(a[key] as string).getTime();
+    return (
+      new Date(b[key] as string).getTime() -
+      new Date(a[key] as string).getTime()
+    );
   });
 }
+
+export const bmiFromMetric = (kg: number, cm: number) => {
+  const m = cm / 100;
+  return kg / (m * m);
+};
+
+export function getBmiStatus(
+  thresholds: Omit<
+    Database['medreport']['Tables']['bmi_thresholds']['Row'],
+    'id'
+  >[],
+  params: { age: number; height: number; weight: number },
+): BmiCategory | null {
+  const age = params.age;
+  const thresholdByAge =
+    thresholds.find(
+      (b) => age >= b.age_min && (b.age_max == null || age <= b.age_max),
+    ) || null;
+  const bmi = bmiFromMetric(params.weight, params.height);
+
+  if (!thresholdByAge || Number.isNaN(bmi)) return null;
+
+  if (bmi > thresholdByAge.obesity_min) return BmiCategory.OBESE;
+  if (bmi > thresholdByAge.strong_min) return BmiCategory.VERY_OVERWEIGHT;
+  if (bmi > thresholdByAge.overweight_min) return BmiCategory.OVER_WEIGHT;
+  if (bmi >= thresholdByAge.normal_min && bmi <= thresholdByAge.normal_max)
+    return BmiCategory.NORMAL;
+  return BmiCategory.UNDER_WEIGHT;
+}
+
+export function getBmiBackgroundColor(bmiStatus: BmiCategory | null): string {
+  switch (bmiStatus) {
+    case BmiCategory.UNDER_WEIGHT:
+      return 'bg-warning';
+    case BmiCategory.NORMAL:
+      return 'bg-success';
+    case BmiCategory.OVER_WEIGHT:
+      return 'bg-warning';
+    case BmiCategory.VERY_OVERWEIGHT:
+      return 'bg-destructive';
+    case BmiCategory.OBESE:
+      return 'bg-error';
+    default:
+      return 'bg-success';
+  }
+}