fix: logic to show BSR improvements (rank drops) in green

test-iso-weeks.ts

@@ -0,0 +1,94 @@
+// Verificar fechas ISO para el experimento BODYNESS
+
+function getISOWeek(date: Date): { year: number; week: number } {
+  const d = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()));
+  const dayNum = d.getUTCDay() || 7;
+  d.setUTCDate(d.getUTCDate() + 4 - dayNum);
+  const yearStart = new Date(Date.UTC(d.getUTCFullYear(), 0, 1));
+  const weekNum = Math.ceil((((d.getTime() - yearStart.getTime()) / 86400000) + 1) / 7);
+  return { year: d.getUTCFullYear(), week: weekNum };
+}
+
+function getISOWeekMonday(year: number, week: number): number {
+  const jan4 = new Date(Date.UTC(year, 0, 4));
+  const dayOfWeek = jan4.getUTCDay() || 7;
+  const week1Monday = new Date(Date.UTC(year, 0, 4 - (dayOfWeek - 1)));
+  return week1Monday.getTime() + (week - 1) * 7 * 86400000;
+}
+
+function getWeeksInYear(year: number): number {
+  const dec28 = new Date(Date.UTC(year, 11, 28));
+  const iso = getISOWeek(dec28);
+  return iso.week;
+}
+
+function calculateISOWeekRange(startDate: Date, endDate: Date): {
+  numWeeks: number;
+  expandedStartTs: number;
+  expandedEndTs: number;
+  weekKeys: string[];
+} {
+  const startISO = getISOWeek(startDate);
+  const endISO = getISOWeek(endDate);
+
+  const weekKeys: string[] = [];
+  let currentYear = startISO.year;
+  let currentWeek = startISO.week;
+
+  while (true) {
+    const weekKey = `${currentYear}-W${String(currentWeek).padStart(2, '0')}`;
+    weekKeys.push(weekKey);
+
+    if (currentYear === endISO.year && currentWeek === endISO.week) {
+      break;
+    }
+
+    currentWeek++;
+    const weeksInYear = getWeeksInYear(currentYear);
+    if (currentWeek > weeksInYear) {
+      currentWeek = 1;
+      currentYear++;
+    }
+  }
+
+  const expandedStartTs = getISOWeekMonday(startISO.year, startISO.week);
+  const expandedEndTs = getISOWeekMonday(endISO.year, endISO.week) + 7 * 86400000;
+
+  return {
+    numWeeks: weekKeys.length,
+    expandedStartTs,
+    expandedEndTs,
+    weekKeys,
+  };
+}
+
+// Experimento: 22 enero - 4 febrero 2026
+const startDate = new Date('2026-01-22');
+const endDate = new Date('2026-02-04');
+
+console.log('=== Experimento BODYNESS ES ===');
+console.log('Start:', startDate.toISOString().split('T')[0], '(day', startDate.getDay(), ')');
+console.log('End:', endDate.toISOString().split('T')[0], '(day', endDate.getDay(), ')');
+console.log('');
+
+const startISO = getISOWeek(startDate);
+const endISO = getISOWeek(endDate);
+console.log('Start ISO:', `W${startISO.week}-${startISO.year}`);
+console.log('End ISO:', `W${endISO.week}-${endISO.year}`);
+console.log('');
+
+const isoRange = calculateISOWeekRange(startDate, endDate);
+console.log('ISO Week Range:');
+console.log('  numWeeks:', isoRange.numWeeks);
+console.log('  weekKeys:', isoRange.weekKeys);
+console.log('  expandedStart:', new Date(isoRange.expandedStartTs).toISOString().split('T')[0]);
+console.log('  expandedEnd:', new Date(isoRange.expandedEndTs).toISOString().split('T')[0]);
+console.log('');
+
+// Verificar cada semana
+isoRange.weekKeys.forEach(week => {
+  const [year, weekNum] = week.split('-W');
+  const monday = getISOWeekMonday(Number(year), Number(weekNum));
+  const sunday = monday + 6 * 86400000 + 86399999;
+  console.log(`  ${week}: ${new Date(monday).toISOString().split('T')[0]} (Mon) → ${new Date(sunday).toISOString().split('T')[0]} (Sun)`);
+});