GooglePlace.swift

import Foundation
import GooglePlaces

final class GooglePlaceService {
    
    private var placesClient: GMSPlacesClient!
    private var filter = GMSAutocompleteFilter()
  
    // Map the Google Category to your own category
    private let typesToDrink = ["bar", "cafe"]
    private let typesToEat = ["meal_delivery", "meal_takeaway", "restaurant"]


    init() {
        // Initialization of the iOS SDK
        placesClient = GMSPlacesClient.shared()
        filter.type = .establishment
    }
    
    func retrieve(from: String, completionBlock: @escaping ([Place]) -> Void) {
        var places = [Place]()
      
        // AUTOCOMPLETE REQUEST
        placesClient.findAutocompletePredictions(
            fromQuery: from,
            filter: filter,
            sessionToken: nil) { (predictions: [GMSAutocompletePrediction]?, error: Error?) in
                
                if let error = error {
                    print("GPT ERROR PLACE: An error occurred: \(error.localizedDescription)")
                    return
                }
                
                if let choices = predictions {
                    for choice in choices {
                        var place = Place()
                        place.name =  choice.attributedPrimaryText.string
                        place.comment = choice.placeID
                        var address = Address()
                        address.street = choice.attributedSecondaryText?.string ?? ""
                        place.addresses.append(address)
                        places.append(place)
                    }
                }
                completionBlock(places)
        }
        
    }
    
    // SECOND REQUEST - Necessary to retrieve Detail information
    func retrieve(place placeId: String, completionBlock: @escaping (Place?) -> Void) {
    
        // Define the fields you want in the response
        let fields = GMSPlaceField(rawValue:
        UInt(GMSPlaceField.name.rawValue)
            | UInt(GMSPlaceField.placeID.rawValue)
            | UInt(GMSPlaceField.addressComponents.rawValue)
            | UInt(GMSPlaceField.formattedAddress.rawValue)
            | UInt(GMSPlaceField.types.rawValue)
            | UInt(GMSPlaceField.coordinate.rawValue)
        )!
        
        placesClient.fetchPlace(
            fromPlaceID: placeId,
            placeFields: fields,
            sessionToken: nil,
            callback: { (googlePlace: GMSPlace?, error: Error?) in
                if let error = error {
                    print("GPT ERROR PLACE: An error occurred: \(error.localizedDescription)")
                    return
                }
                if let googlePlace = googlePlace, let name = googlePlace.name {
                    var place = Place()
                    place.name = name
                    
                    //Address
                    var address = Address()
                    address.street = googlePlace.addressComponents?.first(where: {$0.types.contains("route")})?.name ?? ""
                    // handle the rest of the address
                    place.addresses.append(address)
                    
                    completionBlock(place)
                }
        })
    }

}