SwiftUI，Firestore获取一个集合并与另一个集合匹配

import SwiftUI
import Firebase

FirebaseApp.configure()

struct Item: Identifiable {
    let id: String
    let name: String
    // 其他属性...
}

class DataManager: ObservableObject {
    @Published var items: [Item] = []
    
    init() {
        fetchItems()
    }
    
    func fetchItems() {
        let db = Firestore.firestore()
        
        db.collection("collection1").getDocuments { (snapshot, error) in
            if let error = error {
                print("Error fetching collection1: \(error)")
                return
            }
            
            guard let documents = snapshot?.documents else {
                print("No documents in collection1")
                return
            }
            
            self.items = documents.map { document in
                let data = document.data()
                let id = document.documentID
                let name = data["name"] as? String ?? ""
                // 解析其他属性...
                
                return Item(id: id, name: name)
            }
            
            self.matchItems()
        }
    }
    
    func matchItems() {
        let db = Firestore.firestore()
        
        for item in items {
            db.collection("collection2").whereField("name", isEqualTo: item.name).getDocuments { (snapshot, error) in
                if let error = error {
                    print("Error fetching collection2: \(error)")
                    return
                }
                
                guard let documents = snapshot?.documents else {
                    print("No documents in collection2")
                    return
                }
                
                // 处理匹配的结果...
            }
        }
    }
}

struct ContentView: View {
    @ObservedObject var dataManager = DataManager()
    
    var body: some View {
        List(dataManager.items) { item in
            Text(item.name)
            // 显示其他属性...
        }
    }
}