Filtering events by date in Swift4 - arrays

Question

I'm building an application that provides autistic children with a very simple visual calendar based on scheduled events. So far, I've had no major issues and my events are filtering correctly when the first one is added for each recurrence frequency (daily, weekly, monthly, yearly).
However, for some reason, when I attempt to add a second event with a recurrence frequency that matches any events previously added, it will not populate.
I have attempted to debug and narrow down the issue myself to no avail. I'm sure I'm missing something extremely simple. Thank you in advance for any assistance tracking this down.
This function filters the entire list of dates by date:
func filterEvents() {
filteredEvents = []
tempEvents = []
dates = []
removeOldEvents()
generateRecurrances()
extractDates()
var currentIndex = 0
for date in dates {
if filteredEvents.count == 0 {
filteredEvents.append([])
}
else if filteredEvents.count != currentIndex + 1 {
filteredEvents.append([])
}
filteredEvents[currentIndex] = tempEvents.filter({ $0.filterDate() == date })
currentIndex += 1
}
}
This function is used to extract the necessary information to filter by date:
func extractDates() {
for event in tempEvents {
let extractedDate: (month: Int, day: Int, year: Int) = (event.month(), event.day(), event.year())
dates.append(extractedDate)
}
var currentIndex = 0
for date in dates {
if currentIndex != 0 {
if date.month == dates[currentIndex - 1].month && date.day == dates[currentIndex - 1].day && date.year == dates[currentIndex - 1].year {
dates.remove(at: currentIndex)
currentIndex -= 1
}
}
currentIndex += 1
}
}
This function generates recurring future events based on the user's preference when creating the original event:
func generateRecurrances() {
var dateComponent = DateComponents()
var daysToAdd = 0
var weeksToAdd = 0
var monthsToAdd = 0
var yearsToAdd = 0
for event in events {
if event.recurrenceFrequency == 1 {
for _ in 1...60 {
dateComponent.day = daysToAdd
dateComponent.month = 0
dateComponent.year = 0
let newDate = Calendar.current.date(byAdding: dateComponent, to: event.date)
tempEvents.append(Event(name: event.name, date: newDate!, image: event.image, completion: event.requiresCompletion, recurrenceFrequency: event.recurrenceFrequency))
daysToAdd += 1
}
}
else if event.recurrenceFrequency == 2 {
for _ in 1...8 {
dateComponent.day = weeksToAdd
dateComponent.month = 0
dateComponent.year = 0
let newDate = Calendar.current.date(byAdding: dateComponent, to: event.date)
tempEvents.append(Event(name: event.name, date: newDate!, image: event.image, completion: event.requiresCompletion, recurrenceFrequency: event.recurrenceFrequency))
weeksToAdd += 7
}
}
else if event.recurrenceFrequency == 3 {
for _ in 1...2 {
dateComponent.day = 0
dateComponent.month = monthsToAdd
dateComponent.year = 0
let newDate = Calendar.current.date(byAdding: dateComponent, to: event.date)
tempEvents.append(Event(name: event.name, date: newDate!, image: event.image, completion: event.requiresCompletion, recurrenceFrequency: event.recurrenceFrequency))
monthsToAdd += 1
}
}
else if event.recurrenceFrequency == 4 {
for _ in 1...2 {
dateComponent.day = 0
dateComponent.month = 0
dateComponent.year = yearsToAdd
let newDate = Calendar.current.date(byAdding: dateComponent, to: event.date)
tempEvents.append(Event(name: event.name, date: newDate!, image: event.image, completion: event.requiresCompletion, recurrenceFrequency: event.recurrenceFrequency))
yearsToAdd += 1
}
}
else if event.recurrenceFrequency == 0 {
tempEvents.append(event)
}
}
daysToAdd = 0
}
I really don't think this is related but, just for safety, here is the function that is used to automatically remove events with a date prior to the current date:
func removeOldEvents() {
var currentIndex = 0
let now = Event(name: "Now", date: Date(), image: #imageLiteral(resourceName: "Logo"), completion: false, recurrenceFrequency: 0)
for event in events {
if event.year() < now.year() {
events.remove(at: currentIndex)
currentIndex -= 1
}
else if event.month() < now.month() {
events.remove(at: currentIndex)
currentIndex -= 1
}
else if event.day() < now.day() {
events.remove(at: currentIndex)
currentIndex -= 1
}
currentIndex += 1
}
}

Answer 1

This modification to extractDates() has resolved this issue. Thank you for pointing me in the right direction.
func extractDates() {
for event in tempEvents {
dates.append(event.date)
}
var currentIndex = 0
for date in dates {
let newDate = Calendar.current.date(bySettingHour: 0, minute: 0, second: 0, of: date)!
dates[currentIndex] = newDate
print(dates[currentIndex])
currentIndex += 1
}
var tempDates = dates.removingDuplicates()
tempDates = tempDates.sorted()
dates = tempDates
for date in dates {
let calendar = Calendar.current
let year = calendar.component(.year, from: date)
let month = calendar.component(.month, from: date)
let day = calendar.component(.day, from: date)
dateComponents.append((month, day, year))
}
}