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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.boschindego.internal;
  14
  15 import static org.openhab.binding.boschindego.internal.BoschIndegoBindingConstants.*;
  16
  17 import java.io.IOException;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.openhab.binding.boschindego.internal.exceptions.IndegoAuthenticationException;
  21 import org.openhab.core.auth.client.oauth2.AccessTokenResponse;
  22 import org.openhab.core.auth.client.oauth2.OAuthClientService;
  23 import org.openhab.core.auth.client.oauth2.OAuthException;
  24 import org.openhab.core.auth.client.oauth2.OAuthResponseException;
  25
  26 /**
  27  * The {@link AuthorizationController} acts as a bridge between
  28  * {@link OAuthClientService} and {@link IndegoController}.
  29  *
  30  * @author Jacob Laursen - Initial contribution
  31  */
  32 @NonNullByDefault
  33 public class AuthorizationController implements AuthorizationProvider {
  34
  35     private static final String BEARER = "Bearer ";
  36
  37     private final AuthorizationListener listener;
  38
  39     private OAuthClientService oAuthClientService;
  40
  41     public AuthorizationController(OAuthClientService oAuthClientService, AuthorizationListener listener) {
  42         this.oAuthClientService = oAuthClientService;
  43         this.listener = listener;
  44     }
  45
  46     public void setOAuthClientService(OAuthClientService oAuthClientService) {
  47         this.oAuthClientService = oAuthClientService;
  48     }
  49
  50     public String getAuthorizationHeader() throws IndegoAuthenticationException {
  51         final AccessTokenResponse accessTokenResponse;
  52         try {
  53             accessTokenResponse = getAccessToken();
  54         } catch (OAuthException | OAuthResponseException e) {
  55             var throwable = new IndegoAuthenticationException(
  56                     "Error fetching access token. Invalid authcode? Please generate a new one -> "
  57                             + getAuthorizationUrl(),
  58                     e);
  59             listener.onFailedAuthorization(throwable);
  60             throw throwable;
  61         } catch (IOException e) {
  62             var throwable = new IndegoAuthenticationException("An unexpected IOException occurred: " + e.getMessage(),
  63                     e);
  64             listener.onFailedAuthorization(throwable);
  65             throw throwable;
  66         }
  67
  68         String accessToken = accessTokenResponse.getAccessToken();
  69         if (accessToken == null || accessToken.isEmpty()) {
  70             var throwable = new IndegoAuthenticationException(
  71                     "No access token. Is this thing authorized? -> " + getAuthorizationUrl());
  72             listener.onFailedAuthorization(throwable);
  73             throw throwable;
  74         }
  75         if (accessTokenResponse.getRefreshToken() == null || accessTokenResponse.getRefreshToken().isEmpty()) {
  76             var throwable = new IndegoAuthenticationException(
  77                     "No refresh token. Please reauthorize -> " + getAuthorizationUrl());
  78             listener.onFailedAuthorization(throwable);
  79             throw throwable;
  80         }
  81
  82         listener.onSuccessfulAuthorization();
  83
  84         return BEARER + accessToken;
  85     }
  86
  87     public AccessTokenResponse getAccessToken() throws OAuthException, OAuthResponseException, IOException {
  88         AccessTokenResponse accessTokenResponse = oAuthClientService.getAccessTokenResponse();
  89         if (accessTokenResponse == null) {
  90             throw new OAuthException("No access token response");
  91         }
  92
  93         return accessTokenResponse;
  94     }
  95
  96     private String getAuthorizationUrl() {
  97         try {
  98             return oAuthClientService.getAuthorizationUrl(BSK_REDIRECT_URI, BSK_SCOPE, null);
  99         } catch (OAuthException e) {
 100             return "";
 101         }
 102     }
 103 }