1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.text.MessageFormat;
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7 |
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8 | import org.openstreetmap.josm.Main;
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9 | import org.openstreetmap.josm.data.Preferences.PreferenceChangeEvent;
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10 | import org.openstreetmap.josm.data.Preferences.PreferenceChangedListener;
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11 | import org.openstreetmap.josm.data.osm.User;
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12 | import org.openstreetmap.josm.data.osm.UserInfo;
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13 | import org.openstreetmap.josm.data.preferences.StringSetting;
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14 | import org.openstreetmap.josm.gui.preferences.server.OAuthAccessTokenHolder;
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15 | import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
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16 | import org.openstreetmap.josm.io.OnlineResource;
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17 | import org.openstreetmap.josm.io.OsmApi;
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18 | import org.openstreetmap.josm.io.OsmServerUserInfoReader;
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19 | import org.openstreetmap.josm.io.OsmTransferException;
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20 | import org.openstreetmap.josm.io.auth.CredentialsManager;
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21 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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22 |
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23 | /**
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24 | * JosmUserIdentityManager is a global object which keeps track of what JOSM knows about
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25 | * the identity of the current user.
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26 | *
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27 | * JOSM can be operated anonymously provided the current user never invokes an operation
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28 | * on the OSM server which required authentication. In this case JOSM neither knows
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29 | * the user name of the OSM account of the current user nor its unique id. Perhaps the
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30 | * user doesn't have one.
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31 | *
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32 | * If the current user supplies a user name and a password in the JOSM preferences JOSM
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33 | * can partially identify the user.
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34 | *
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35 | * The current user is fully identified if JOSM knows both the user name and the unique
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36 | * id of the users OSM account. The latter is retrieved from the OSM server with a
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37 | * <tt>GET /api/0.6/user/details</tt> request, submitted with the user name and password
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38 | * of the current user.
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39 | *
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40 | * The global JosmUserIdentityManager listens to {@link PreferenceChangeEvent}s and keeps track
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41 | * of what the current JOSM instance knows about the current user. Other subsystems can
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42 | * let the global JosmUserIdentityManager know in case they fully identify the current user, see
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43 | * {@link #setFullyIdentified}.
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44 | *
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45 | * The information kept by the JosmUserIdentityManager can be used to
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46 | * <ul>
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47 | * <li>safely query changesets owned by the current user based on its user id, not on its user name</li>
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48 | * <li>safely search for objects last touched by the current user based on its user id, not on its user name</li>
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49 | * </ul>
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50 | *
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51 | */
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52 | public final class JosmUserIdentityManager implements PreferenceChangedListener {
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53 |
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54 | private static JosmUserIdentityManager instance;
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55 |
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56 | /**
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57 | * Replies the unique instance of the JOSM user identity manager
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58 | *
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59 | * @return the unique instance of the JOSM user identity manager
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60 | */
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61 | public static synchronized JosmUserIdentityManager getInstance() {
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62 | if (instance == null) {
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63 | instance = new JosmUserIdentityManager();
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64 | if (OsmApi.isUsingOAuth() && OAuthAccessTokenHolder.getInstance().containsAccessToken() &&
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65 | !Main.isOffline(OnlineResource.OSM_API)) {
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66 | try {
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67 | instance.initFromOAuth();
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68 | } catch (RuntimeException e) {
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69 | Main.error(e);
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70 | // Fall back to preferences if OAuth identification fails for any reason
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71 | instance.initFromPreferences();
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72 | }
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73 | } else {
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74 | instance.initFromPreferences();
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75 | }
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76 | Main.pref.addPreferenceChangeListener(instance);
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77 | }
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78 | return instance;
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79 | }
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80 |
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81 | private String userName;
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82 | private UserInfo userInfo;
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83 | private boolean accessTokenKeyChanged;
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84 | private boolean accessTokenSecretChanged;
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85 |
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86 | private JosmUserIdentityManager() {
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87 | }
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88 |
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89 | /**
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90 | * Remembers the fact that the current JOSM user is anonymous.
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91 | */
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92 | public void setAnonymous() {
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93 | userName = null;
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94 | userInfo = null;
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95 | }
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96 |
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97 | /**
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98 | * Remebers the fact that the current JOSM user is partially identified
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99 | * by the user name of its OSM account.
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100 | *
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101 | * @param userName the user name. Must not be null. Must not be empty (whitespace only).
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102 | * @throws IllegalArgumentException if userName is null
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103 | * @throws IllegalArgumentException if userName is empty
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104 | */
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105 | public void setPartiallyIdentified(String userName) {
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106 | CheckParameterUtil.ensureParameterNotNull(userName, "userName");
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107 | if (userName.trim().isEmpty())
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108 | throw new IllegalArgumentException(
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109 | MessageFormat.format("Expected non-empty value for parameter ''{0}'', got ''{1}''", "userName", userName));
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110 | this.userName = userName;
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111 | userInfo = null;
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112 | }
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113 |
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114 | /**
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115 | * Remembers the fact that the current JOSM user is fully identified with a
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116 | * verified pair of user name and user id.
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117 | *
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118 | * @param username the user name. Must not be null. Must not be empty.
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119 | * @param userinfo additional information about the user, retrieved from the OSM server and including the user id
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120 | * @throws IllegalArgumentException if userName is null
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121 | * @throws IllegalArgumentException if userName is empty
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122 | * @throws IllegalArgumentException if userinfo is null
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123 | */
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124 | public void setFullyIdentified(String username, UserInfo userinfo) {
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125 | CheckParameterUtil.ensureParameterNotNull(username, "username");
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126 | if (username.trim().isEmpty())
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127 | throw new IllegalArgumentException(tr("Expected non-empty value for parameter ''{0}'', got ''{1}''", "userName", userName));
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128 | CheckParameterUtil.ensureParameterNotNull(userinfo, "userinfo");
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129 | this.userName = username;
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130 | this.userInfo = userinfo;
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131 | }
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132 |
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133 | /**
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134 | * Replies true if the current JOSM user is anonymous.
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135 | *
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136 | * @return {@code true} if the current user is anonymous.
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137 | */
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138 | public boolean isAnonymous() {
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139 | return userName == null && userInfo == null;
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140 | }
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141 |
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142 | /**
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143 | * Replies true if the current JOSM user is partially identified.
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144 | *
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145 | * @return true if the current JOSM user is partially identified.
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146 | */
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147 | public boolean isPartiallyIdentified() {
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148 | return userName != null && userInfo == null;
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149 | }
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150 |
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151 | /**
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152 | * Replies true if the current JOSM user is fully identified.
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153 | *
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154 | * @return true if the current JOSM user is fully identified.
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155 | */
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156 | public boolean isFullyIdentified() {
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157 | return userName != null && userInfo != null;
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158 | }
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159 |
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160 | /**
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161 | * Replies the user name of the current JOSM user. null, if {@link #isAnonymous()} is true.
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162 | *
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163 | * @return the user name of the current JOSM user
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164 | */
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165 | public String getUserName() {
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166 | return userName;
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167 | }
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168 |
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169 | /**
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170 | * Replies the user id of the current JOSM user. 0, if {@link #isAnonymous()} or
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171 | * {@link #isPartiallyIdentified()} is true.
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172 | *
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173 | * @return the user id of the current JOSM user
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174 | */
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175 | public int getUserId() {
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176 | if (userInfo == null) return 0;
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177 | return userInfo.getId();
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178 | }
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179 |
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180 | /**
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181 | * Replies verified additional information about the current user if the user is
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182 | * {@link #isFullyIdentified()}.
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183 | *
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184 | * @return verified additional information about the current user
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185 | */
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186 | public UserInfo getUserInfo() {
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187 | return userInfo;
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188 | }
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189 |
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190 | /**
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191 | * Returns the identity as a {@link User} object
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192 | *
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193 | * @return the identity as user, or {@link User#getAnonymous()} if {@link #isAnonymous()}
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194 | */
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195 | public User asUser() {
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196 | return isAnonymous() ? User.getAnonymous() : User.createOsmUser(userInfo != null ? userInfo.getId() : 0, userName);
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197 | }
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198 |
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199 | /**
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200 | * Initializes the user identity manager from Basic Authentication values in the {@link org.openstreetmap.josm.data.Preferences}
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201 | * This method should be called if {@code osm-server.auth-method} is set to {@code basic}.
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202 | * @see #initFromOAuth
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203 | */
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204 | public void initFromPreferences() {
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205 | String userName = CredentialsManager.getInstance().getUsername();
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206 | if (isAnonymous()) {
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207 | if (userName != null && !userName.trim().isEmpty()) {
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208 | setPartiallyIdentified(userName);
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209 | }
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210 | } else {
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211 | if (userName != null && !userName.equals(this.userName)) {
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212 | setPartiallyIdentified(userName);
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213 | }
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214 | // else: same name in the preferences as JOSM already knows about.
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215 | // keep the state, be it partially or fully identified
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216 | }
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217 | }
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218 |
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219 | /**
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220 | * Initializes the user identity manager from OAuth request of user details.
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221 | * This method should be called if {@code osm-server.auth-method} is set to {@code oauth}.
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222 | * @see #initFromPreferences
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223 | * @since 5434
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224 | */
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225 | public void initFromOAuth() {
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226 | try {
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227 | UserInfo info = new OsmServerUserInfoReader().fetchUserInfo(NullProgressMonitor.INSTANCE);
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228 | setFullyIdentified(info.getDisplayName(), info);
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229 | } catch (IllegalArgumentException | OsmTransferException e) {
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230 | Main.error(e);
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231 | }
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232 | }
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233 |
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234 | /**
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235 | * Replies true if the user with name <code>username</code> is the current user
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236 | *
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237 | * @param username the user name
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238 | * @return true if the user with name <code>username</code> is the current user
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239 | */
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240 | public boolean isCurrentUser(String username) {
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241 | return username != null && this.userName != null && this.userName.equals(username);
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242 | }
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243 |
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244 | /**
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245 | * Replies true if the current user is {@link #isFullyIdentified() fully identified} and the {@link #getUserId() user ids} match,
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246 | * or if the current user is not {@link #isFullyIdentified() fully identified} and the {@link #userName user names} match.
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247 | *
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248 | * @param user the user to test
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249 | * @return true if given user is the current user
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250 | */
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251 | public boolean isCurrentUser(User user) {
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252 | if (user == null) {
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253 | return false;
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254 | } else if (isFullyIdentified()) {
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255 | return getUserId() == user.getId();
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256 | } else {
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257 | return isCurrentUser(user.getName());
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258 | }
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259 | }
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260 |
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261 | /* ------------------------------------------------------------------- */
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262 | /* interface PreferenceChangeListener */
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263 | /* ------------------------------------------------------------------- */
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264 | @Override
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265 | public void preferenceChanged(PreferenceChangeEvent evt) {
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266 | switch (evt.getKey()) {
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267 | case "osm-server.username":
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268 | String newUserName = null;
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269 | if (evt.getNewValue() instanceof StringSetting) {
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270 | newUserName = ((StringSetting) evt.getNewValue()).getValue();
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271 | }
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272 | if (newUserName == null || newUserName.trim().isEmpty()) {
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273 | setAnonymous();
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274 | } else {
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275 | if (!newUserName.equals(userName)) {
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276 | setPartiallyIdentified(newUserName);
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277 | }
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278 | }
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279 | return;
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280 | case "osm-server.url":
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281 | String newUrl = null;
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282 | if (evt.getNewValue() instanceof StringSetting) {
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283 | newUrl = ((StringSetting) evt.getNewValue()).getValue();
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284 | }
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285 | if (newUrl == null || newUrl.trim().isEmpty()) {
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286 | setAnonymous();
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287 | } else if (isFullyIdentified()) {
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288 | setPartiallyIdentified(getUserName());
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289 | }
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290 | break;
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291 | case "oauth.access-token.key":
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292 | accessTokenKeyChanged = true;
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293 | break;
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294 | case "oauth.access-token.secret":
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295 | accessTokenSecretChanged = true;
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296 | break;
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297 | default: // Do nothing
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298 | }
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299 |
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300 | if (accessTokenKeyChanged && accessTokenSecretChanged) {
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301 | accessTokenKeyChanged = false;
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302 | accessTokenSecretChanged = false;
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303 | if (OsmApi.isUsingOAuth()) {
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304 | getInstance().initFromOAuth();
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305 | }
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306 | }
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307 | }
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308 | }
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