Data Export with Share Sheet

DataExportWithShareSheet.swift

import SwiftUI
import SwiftData

struct ContentView: View {
  @Environment(\.modelContext) var modelContext
  @State private var sharingExport: Bool = false
  @State private var exportUrl: URL?
  
  var body: some View {
    Button("Export your data") {
      exportData()
    }
    .sheet(isPresented: $sharingExport) {
      if let exportData = exportUrl {
        ShareSheet(showing: $sharingExport, sharing: [exportData])
      } else {
        Text("Export being processed")
      }
    }
  }
  
  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)
      exportUrl = url
      sharingExport = true
    } else {
      // something when there's no records
    }
  }
}