Data Export Button with UX improvements

UXImprovedDataExportButton.swift

import SwiftUI
import SwiftData

struct DataExportButton: View {
  @Environment(\.modelContext) var modelContext
  @State private var generatingExport = false
  @State private var showExportError = false
  @Binding var sharingExport: Bool = false
  @Binding var exportUrl: URL?
  
  var body: some View {
    Section {
      Button("Export your data") {
        generatingExport = true
        Task {
          exportData()
        }
      }
      .disabled(generatingExport)
      .alert("Unexpected error generating export", isPresented: $showExportError) {
        Button("Close") {
          handleClosingExportErrorAlert() 
        }
    } header: {
      Text("Export your data")
    } footer: {
      if  generatingExport {
        Text("Currently generating export")
      }
    }
  }
    
  func handleClosingExportErrorAlert() {
    showExportError = false
  }
  
  func getMarkdown(records: [Record]) -> String {
    var markdown: String = "# Data Export\n\n"
    for record in records {
      exportData += "## Header\n\(record.somePropertyToInclude)\n"
    }
    return markdown
  }
  
  func dataExportUrl() {
    let descriptor = FetchDescriptor<Record>()
    let fetchedRecords = try? modelContext.fetch(descriptor)
    if let records = fetchedRecords {
      let markdown = getMarkdown(records)
      let dateFormatter = DateFormatter()
      dateFormatter.dateFormat = "yyyy-MM-dd"
      let url = FileManager.default.temporaryDirectory.appendingPathComponent("export-\(dateFormatter.string(from: Date.now))").appendingPathExtension("md")
      try? markdown.write(to: url, atomically: true, encoding: .utf8)
      generatingExport = false
      exportUrl = url
      sharingExport = true
    } else {
      generatingExport = false
      showExportError = true
    }
  }
}