Support data sharing with App Groups for App Clips

[IsaiahJTurner]

We use App Group and would like to use a shared app group container so our App Clip can have the same identity. Currently, this workaround of swizzling various parts of Persistence seems to work but is not ideal.

public extension URL {
  static var dataDirectory: URL? {
    let appGroupURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: Constants.appGroupId)
    let defaultDirectory = try? FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
    return appGroupURL ?? defaultDirectory
  }
}

extension FileManager {
  
  // Swizzled method
  @objc private func swizzled_urls(for directory: FileManager.SearchPathDirectory, in domainMask: FileManager.SearchPathDomainMask) -> [URL] {
    if Thread.callStackSymbols.joined().contains("Mixpanel"), let dataDirectory = URL.dataDirectory {
      return [dataDirectory]
    }
    return swizzled_urls(for: directory, in: domainMask)
  }
  
  static let swizzleURLs: Void = {
    let originalSelector = #selector(FileManager.urls(for:in:))
    let swizzledSelector = #selector(FileManager.swizzled_urls(for:in:))
    
    guard
      let originalMethod = class_getInstanceMethod(FileManager.self, originalSelector),
      let swizzledMethod = class_getInstanceMethod(FileManager.self, swizzledSelector)
    else {
      return
    }
    
    method_exchangeImplementations(originalMethod, swizzledMethod)
  }()
}

public extension UserDefaults {
  static let swizzleSuiteName: Void = {
      let originalSelector = #selector(UserDefaults.init(suiteName:))
    let swizzledSelector = #selector(UserDefaults.init(swizzled_init:))

      guard let originalMethod = class_getInstanceMethod(UserDefaults.self, originalSelector),
            let swizzledMethod = class_getInstanceMethod(UserDefaults.self, swizzledSelector) else {
          return
      }

      method_exchangeImplementations(originalMethod, swizzledMethod)
  }()

  @objc convenience init?(swizzled_init suiteName: String?) {
      if suiteName == "Mixpanel" {
          self.init(suiteName: Constants.appGroupId)
      } else {
          self.init(swizzled_init: suiteName)
      }
  }
}