tns-oauth-native-view-controller.ios.ts

import { Frame } from "@nativescript/core";

import {
  TnsOAuthClient,
  ITnsOAuthTokenResult,
  TnsOAuthClientLoginBlock,
  TnsOAuthClientLogoutBlock,
} from "./index";
import {
  ITnsOAuthLoginController,
  TnsOAuthLoginSubController,
} from "./tns-oauth-login-sub-controller";

function setup() {
  @NativeClass()
  class TnsOAuthLoginNativeViewController
    extends NSObject
    implements SFSafariViewControllerDelegate, ITnsOAuthLoginController {
    public static ObjCProtocols = [SFSafariViewControllerDelegate];

    private loginController: TnsOAuthLoginSubController = null;
    private safariViewController: SFSafariViewController;

    public static initWithClient(client: TnsOAuthClient) {
      const instance = new TnsOAuthLoginNativeViewController();
      if (instance) {
        instance.loginController = new TnsOAuthLoginSubController(client);
      }
      return instance;
    }

    public loginWithParametersFrameCompletion(
      parameters,
      frame: Frame,
      urlScheme?: string,
      completion?: TnsOAuthClientLoginBlock
    ) {
      const fullUrl = this.loginController.preLoginSetup(
        frame,
        urlScheme,
        completion
      );

      this.openUrlWithParametersCompletion(fullUrl, frame);
    }

    public logoutWithParametersFrameCompletion(
      parameters,
      frame: Frame,
      urlScheme?: string,
      completion?: TnsOAuthClientLogoutBlock
    ) {
      const fullUrl = this.loginController.preLogoutSetup(
        frame,
        urlScheme,
        completion
      );

      this.openUrlWithParametersCompletion(fullUrl, frame);
    }

    private openUrlWithParametersCompletion(
      fullUrl: string,
      frame: Frame
    ): void {
      this.safariViewController = SFSafariViewController.alloc().initWithURLEntersReaderIfAvailable(
        NSURL.URLWithString(fullUrl),
        false
      );

      this.safariViewController.delegate = this;

      if (frame.parent) {
        let topmostParent = frame.parent;
        while (topmostParent.parent) {
          topmostParent = topmostParent.parent;
        }
        topmostParent.viewController.presentViewControllerAnimatedCompletion(
          this.safariViewController,
          true,
          null
        );
      } else {
        frame.ios.controller.presentViewControllerAnimatedCompletion(
          this.safariViewController,
          true,
          null
        );
      }
    }

    public resumeWithUrl(url: string): boolean {
      return this.loginController.resumeWithUrl(
        url,
        (tokenResult: ITnsOAuthTokenResult, error) => {
          if (this.safariViewController) {
            this.safariViewController.dismissViewControllerAnimatedCompletion(
              true,
              () => {
                this.loginController.completeLoginWithTokenResponseError(
                  tokenResult,
                  error
                );
              }
            );
          } else {
            this.loginController.completeLoginWithTokenResponseError(
              tokenResult,
              error
            );
          }
        }
      );
    }

    // SFSafariViewControllerDelegate delegate members
    public safariViewControllerDidFinish(
      controller: SFSafariViewController
    ): void {
      if (controller !== this.safariViewController) {
        // Ignore this call if safari view controller doesn't match
        return;
      }

      if (!this.loginController.authState) {
        // Ignore this call if there is no pending login flow
        return;
      }

      const er = "The login operation was canceled.";
      this.loginController.completeLoginWithTokenResponseError(null, er);
    }
  }

  return TnsOAuthLoginNativeViewController;
}

export const TnsOAuthLoginNativeViewController = setup();