I'm currently working on a project which let users to rent extra spaces. You can think clone of airbnb. In this iOS app, I'm using Firebase for Back-end as a Service.
I want to retrieve the flats that satisfy the filtering options like, bed count, bedroom count, Smoking etc. Logically, I'm grouping all flats by time slots first, then fetching the flats satisfies filtered city, then i'm fetching the flats which satisfies the filters. Then I'm iterating all the flats one by one to fetch their images.
My Json tree is like:
filter_flats/FlatCity/FlatID
time_slots/timestamp/flatID:true
flat_images/FlatID
Here is what I'm trying:
import Foundation
import Firebase
import FirebaseStorage
protocol QuerymasterDelegate :class
{
func getFilteredFlats(filter:FilterModel, completion: @escaping ([FilteredFlat]) -> ())
}
class Querymaster:QuerymasterDelegate
{
var flatEndpoint = FIRFlat()
var returningFlats = [FilteredFlat]()
/////////////////////////////////////////////////////////////
//MARK: This method pulls all flats with required timeslot.//
/////////////////////////////////////////////////////////////
internal func getFilteredFlats(filter: FilterModel, completion: @escaping ([FilteredFlat]) -> ()) {
var zamanAraliginaUygunFlatlar = [String]()
FIRREF.instance().getRef().child("time_slots").queryOrderedByKey().queryStarting(atValue: filter.fromDate?.toTimeStamp()).queryEnding(atValue: filter.toDate?.toTimeStamp()).observeSingleEvent(of: .value, with: { (ss) in
for ts in ss.children.allObjects
{
let timeslotFlatObj = ts as! FIRDataSnapshot
let timeslotForFlat = timeslotFlatObj.value as! [String:Bool]
for x in timeslotForFlat
{
if (x.value == true && !zamanAraliginaUygunFlatlar.contains(x.key))
{
zamanAraliginaUygunFlatlar.append(x.key)
}
}
}
/////////////////////////////////////////////////////////
//MARK: This method pulls all flats with filtered city.//
/////////////////////////////////////////////////////////
FIRREF.instance().getRef().child("filter_flats/" + filter.city!).observe(.value, with: { (ss) in
var sehirdekiFlatler = [String:Flat]()
for i in ss.children.allObjects
{
let flt = Flat()
let flatObject = i as! FIRDataSnapshot
let mainDict = flatObject.value as! [String:Any]
flt.userID = (mainDict["userId"] as? String)!
flt.id = flatObject.key
flt.city = filter.city
flt.title = mainDict["title"] as? String
flt.bathroomCount = mainDict["bathroomCount"] as? Int
flt.bedCount = mainDict["bedCount"] as? Int
flt.bedroomCount = mainDict["bedroomCount"] as? Int
flt.internet = mainDict["internet"] as? Bool
flt.elevator = mainDict["elevator"] as? Bool
flt.heating = mainDict["heating"] as? Bool
flt.gateKeeper = mainDict["gateKeeper"] as?Bool
flt.parking = mainDict["parking"] as? Bool
flt.pool = mainDict["pool"] as? Bool
flt.smoking = mainDict["smoking"] as? Bool
flt.tv = mainDict["tv"] as? Bool
flt.flatCapacity = mainDict["capacity"] as? Int
flt.cooling = mainDict["cooling"] as? Bool
flt.price = mainDict["price"] as? Double
flt.washingMachine = mainDict["washingMachine"] as? Bool
sehirdekiFlatler[flt.id] = flt
if(!(zamanAraliginaUygunFlatlar).contains(flt.id))
{
if(filter.bathroomCount == nil || filter.bathroomCount! <= flt.bathroomCount!)
{
if(filter.bedCount == nil || filter.bedCount! <= flt.bedCount!)
{
if(filter.bedroomCount == nil || filter.bedroomCount! <= flt.bedroomCount!)
{
if(filter.internet == false || filter.internet! == flt.internet!)
{
if(filter.elevator == false || filter.elevator! == flt.elevator!)
{
if(filter.heating == false || filter.heating! == flt.heating!)
{
if(filter.gateKeeper == false || filter.gateKeeper! == flt.gateKeeper!)
{
if(filter.parking == false || filter.parking! == flt.parking!)
{
if(filter.pool == false || filter.pool! == flt.pool!)
{
if(filter.smoking! == false || filter.smoking! == flt.smoking!)
{
if(filter.tv! == false || filter.tv! == flt.tv!)
{
if(filter.capacity == nil || filter.capacity! <= flt.flatCapacity!)
{
if(filter.cooling == false || filter.cooling! == flt.cooling!)
{
if(filter.priceFrom == nil || filter.priceFrom! <= flt.price!)
{
if(filter.priceTo == nil || filter.priceTo! >= flt.price!)
{
if(filter.washingMachine == false || filter.washingMachine! == flt.washingMachine!)
{
let filteredFlat = FilteredFlat()
filteredFlat.flatCity = flt.city
filteredFlat.flatID = flt.id
filteredFlat.flatPrice = flt.price
filteredFlat.flatTitle = flt.title
filteredFlat.userID = flt.userID
self.returningFlats.append(filteredFlat)
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
////////////////////////////////////////////////////////////////
//MARK: This method pulls thumbnail image for returning Flats.//
////////////////////////////////////////////////////////////////
if self.returningFlats.count > 0
{
for a in self.returningFlats
{
FIRREF.instance().getRef().child("flat_images/" + a.flatID!).observeSingleEvent(of: .value, with: { (ss) in
let dict = ss.children.allObjects[0] as! FIRDataSnapshot
let obj = dict.value as! [String:String]
let flatImageDownloaded = FlatImageDownloaded(imageID: dict.key, imageDownloadURL: obj["downloadURL"]!)
a.flatThumbnailImage = flatImageDownloaded
completion(self.returningFlats)
})
}
}
})
})
}
}
The marked code This method pulls thumbnail image for returning Flats. is usually fetching data slower because of jumping among nodes of flats.
I didn't realized that what i'm doing wrong. Can you suggest more efficient method?
Thanks in advance.
