EventStore.swift

//
//  EventStore.swift
//  DavisFriends
//
//  Created by Jerry Au on 4/27/25.
//
import SwiftUI
import MapKit
import Foundation
import FirebaseFirestore

struct Pin: Identifiable, Codable{
    @DocumentID var id: String?
    var lat: Double
    var long: Double
    var locationName: String
    var description: String?
    
    var mkAnnotation: MKPointAnnotation{
        let ann = MKPointAnnotation()
        ann.coordinate = CLLocationCoordinate2D(latitude: lat, longitude: long)
        
        ann.title = locationName
        ann.subtitle = description
        return ann
    }
}
class EventStore: ObservableObject{
    @Published var pins: [Pin] = []
    private var database = Firestore.firestore()
    private var listener: ListenerRegistration?
    init(){
        subscribe()
    }
    deinit{
        listener?.remove()
    }
    func subscribe(){
        listener = database.collection("pins")
            .addSnapshotListener{snapshot, error in guard let docs = snapshot?.documents else {return}
                self.pins = docs.compactMap{try? $0.data(as: Pin.self)}
            }
    }
    func append(_ pin: Pin){
        do {
            _ = try database.collection("pins").addDocument(from: pin)
        }catch{
            print("Error in appending", error)
        }
    }
    func remove(_ pin: Pin){
        guard let id = pin.id else {return}
        database.collection("pins").document(id).delete()
    }
}