fix: weekbased calculation pdf report

with this change the time calculations for pdf reports should be better
line with the reports send as "week_report"

Backend/helper/system.go

@@ -20,6 +20,10 @@ func GetEnv(key, fallback string) string {
 	return fallback
 }
 
+func IsDebug() bool {
+	return GetEnv("GO_ENV", "production") == "debug"
+}
+
 type CacheItem struct {
 	value      any
 	expiration time.Time

Backend/helper/time.go

@@ -4,6 +4,7 @@ package helper
 
 import (
 	"fmt"
+	"slices"
 	"time"
 )
 
@@ -18,6 +19,64 @@ func GetMonday(ts time.Time) time.Time {
 	return ts
 }
 
+func GetMondays(allDays []time.Time, onlyInRange bool) []time.Time {
+	var mondays []time.Time
+	var start, end time.Time
+
+	for _, day := range allDays {
+		mondays = append(mondays, GetMonday(day))
+
+		if start.IsZero() || day.Before(start) {
+			start = day
+		}
+		if end.IsZero() || day.After(end) {
+			end = day
+		}
+	}
+	mondays = slices.Compact(mondays)
+	if onlyInRange {
+		return DaysInRange(mondays, start, end)
+	}
+	return mondays
+}
+
+func DaysInRange(days []time.Time, startDate, endDate time.Time) []time.Time {
+	filtered := []time.Time{}
+	startDate = startDate.Add(-time.Minute)
+	endDate = endDate.Add(time.Minute)
+
+	for _, day := range days {
+		if day.After(startDate) && day.Before(endDate) {
+			filtered = append(filtered, day)
+		}
+	}
+	return filtered
+}
+
+func IsMonday(day time.Time) bool {
+	return day.Weekday() == time.Monday
+}
+
+// GenerateDateRange returns a slice of all dates between start and end (inclusive).
+func GenerateDateRange(start, end time.Time) []time.Time {
+	var dates []time.Time
+
+	// Ensure start is before or equal to end
+	if start.After(end) {
+		return dates
+	}
+
+	// Normalize times to midnight
+	current := start.Truncate(time.Hour * 24)
+	end = end.Truncate(time.Hour * 24)
+
+	for !current.After(end) {
+		dates = append(dates, current)
+		current = current.AddDate(0, 0, 1) // Add one day
+	}
+	return dates
+}
+
 func GetFirstOfMonth(ts time.Time) time.Time {
 	if ts.Day() > 1 {
 		return ts.AddDate(0, 0, -(ts.Day() - 1))

Backend/helper/time_test.go

@@ -26,6 +26,101 @@ func TestGetMonday(t *testing.T) {
 	}
 }
 
+func TestIsMonday_ReturnsTrueForMonday(t *testing.T) {
+	monday := time.Date(2023, 4, 3, 0, 0, 0, 0, time.UTC)
+
+	if !IsMonday(monday) {
+		t.Errorf("Expected IsMonday to return true for Monday, got false")
+	}
+}
+
+func TestIsMonday_ReturnsFalseForNonMonday(t *testing.T) {
+	tuesday := time.Date(2023, 4, 4, 0, 0, 0, 0, time.UTC)
+
+	if IsMonday(tuesday) {
+		t.Errorf("Expected IsMonday to return false for Tuesday, got true")
+	}
+}
+
+func TestGenerateDateRange(t *testing.T) {
+	start := time.Date(2026, 2, 9, 0, 0, 0, 0, time.UTC)
+	end := time.Date(2026, 2, 11, 0, 0, 0, 0, time.UTC)
+
+	dates := GenerateDateRange(start, end)
+
+	if len(dates) != 3 {
+		t.Fatalf("expected 3 dates, got %d", len(dates))
+	}
+
+	expected := []string{"2026-02-09", "2026-02-10", "2026-02-11"}
+	for i, d := range dates {
+		got := d.Format("2006-01-02")
+		if got != expected[i] {
+			t.Errorf("expected %s, got %s", expected[i], got)
+		}
+	}
+}
+
+func TestGetMondays_ReturnsOnlyMondays(t *testing.T) {
+	startDate := time.Date(2026, 01, 01, 0, 0, 0, 0, time.UTC)
+	endDate := time.Date(2026, 01, 31, 0, 0, 0, 0, time.UTC)
+
+	daysInMonth := GenerateDateRange(startDate, endDate)
+	result := GetMondays(daysInMonth, false)
+	if len(result) < 5 {
+		t.Errorf("Expected 5 monday, got %d", len(result))
+	} else if len(result) > 5 {
+		t.Errorf("Expected 5 monday, got %d", len(result))
+	}
+
+	if result[0] != time.Date(2025, 12, 29, 0, 0, 0, 0, time.UTC) {
+		t.Errorf("Expected first monday to be %v, got %v", "2025-12-29", result[0])
+	}
+}
+
+func TestGetMondays_ReturnsOnlyMondaysInRange(t *testing.T) {
+	startDate := time.Date(2026, 01, 01, 0, 0, 0, 0, time.UTC)
+	endDate := time.Date(2026, 01, 31, 0, 0, 0, 0, time.UTC)
+
+	daysInMonth := GenerateDateRange(startDate, endDate)
+	result := GetMondays(daysInMonth, true)
+	if len(result) < 4 {
+		t.Errorf("Expected 4 monday, got %d", len(result))
+	} else if len(result) > 4 {
+		t.Errorf("Expected 4 monday, got %d", len(result))
+	}
+
+	if result[0] != time.Date(2026, 1, 5, 0, 0, 0, 0, time.UTC) {
+		t.Errorf("Expected first monday to be %v, got %v", "2026-01-05", result[0])
+	}
+}
+
+func TestDaysInRange(t *testing.T) {
+	days := []time.Time{
+		time.Date(2023, 4, 3, 0, 0, 0, 0, time.UTC), // Tuesday
+		time.Date(2023, 4, 4, 0, 0, 0, 0, time.UTC), // Wednesday
+		time.Date(2023, 4, 5, 0, 0, 0, 0, time.UTC), // Thursday
+		time.Date(2023, 4, 6, 0, 0, 0, 0, time.UTC), // Friday
+	}
+
+	start := time.Date(2023, 4, 3, 0, 0, 0, 0, time.UTC)
+	end := time.Date(2023, 4, 5, 0, 0, 0, 0, time.UTC)
+
+	daysInRange := DaysInRange(days, start, end)
+
+	if len(daysInRange) != 3 {
+		t.Errorf("Expected 3 days in range, got %d", len(daysInRange))
+	}
+
+	if daysInRange[0] != days[0] {
+		t.Errorf("Expected first day in range to be %v, got %v", days[0], daysInRange[0])
+	}
+
+	if daysInRange[2] != days[2] {
+		t.Errorf("Expected third day in range to be %v, got %v", days[2], daysInRange[2])
+	}
+}
+
 func TestFormatDurationFill(t *testing.T) {
 	testCases := []struct {
 		name     string

Backend/helper/web.go

@@ -24,7 +24,7 @@ func SetCors(w http.ResponseWriter) {
 
 func RequiresLogin(session *scs.SessionManager, w http.ResponseWriter, r *http.Request) {
 	r = r.WithContext(context.WithValue(r.Context(), "session", session))
-	if GetEnv("GO_ENV", "production") == "debug" {
+	if IsDebug() {
 		return
 	}
 	if session.Exists(r.Context(), "user") {