Date Test Approach 2 fetchMonthData and fetchYearData

fetchMonthData.swift

func fetchMonthData() {
  do {
    let calendar = Calendar.init(identifier: .iso8601)
    let date = calendar.date(from: DateComponents(year: year, month: month: day: 1))!
    let weekOfMonth = calendar.component(.weekOfMonth, from: date)
    var predicate: Predicate<ApproachModel>
    if (weekOfMonth == 0) {
      let weekOfYear = calendar.component(.weekOfYear, from: date)
      predicate = #Predicate { todo in
        ((todo.year == year && todo.month == month) || (todo.week == weekOfYear)) && todo.shownInMonth == true
      }
    } else {
      predicate = #Predicate { todo in
        todo.year == year && todo.month == month && todo.shownInMonth == true
      }
    }
    let descriptor = FetchDescriptor<ApproachModel>(predicate: predicate)
    todos = try modelContext.fetch(descriptor)
  } catch {
    print("Failed to fetch month data")
  }
}

func fetchYearData() {
  do {
    let calendar = Calendar.init(identifier: .iso8601)
    let date = calendar.date(from: DateComponents(year: year, month: 1, day: 1))!
    let dayOfWeek = calendar.component(.weekday, from: date)
    var predicate: Predicate<ApproachModel>
    if (dayOfWeek != 2) {
      let previousYear = calendar.date(from: DateComponents(year: year - 1, month: 1, day: 1))!
      let previousYearRange = calendar.range(of: .weekOfYear, in: .yearForWeekOfYear, for: previousYear)
      predicate = #Predicate { todo in
        ((todo.year == year && todo.month == month) || (todo.year == year - 1 && todo.week == previousYearRange?.count)) && todo.shownInMonth == true
      }
    } else {
      predicate = #Predicate { todo in
        todo.year == year && todo.month == month && todo.shownInMonth == true
      }
    }
    let descriptor = FetchDescriptor<ApproachModel>(predicate: predicate)
    todos = try modelContext.fetch(descriptor)
  } catch {
    print("Failed to fetch year data")
  }
}