create update step for migration of anonymous mode

scm-webapp/src/main/java/sonia/scm/update/repository/AnonymousModeUpdateStep.java

@@ -0,0 +1,100 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.update.repository;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import sonia.scm.SCMContextProvider;
+import sonia.scm.config.ScmConfiguration;
+import sonia.scm.migration.UpdateStep;
+import sonia.scm.security.AnonymousMode;
+import sonia.scm.store.ConfigurationStore;
+import sonia.scm.store.ConfigurationStoreFactory;
+import sonia.scm.store.StoreConstants;
+import sonia.scm.version.Version;
+
+import javax.inject.Inject;
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+import java.io.File;
+import java.nio.file.Path;
+
+import static sonia.scm.version.Version.parse;
+
+public class AnonymousModeUpdateStep implements UpdateStep {
+
+  private final SCMContextProvider contextProvider;
+  private final ConfigurationStore<ScmConfiguration> configStore;
+
+  @Inject
+  public AnonymousModeUpdateStep(SCMContextProvider contextProvider, ConfigurationStoreFactory configurationStoreFactory) {
+    this.contextProvider = contextProvider;
+    this.configStore = configurationStoreFactory.withType(ScmConfiguration.class).withName("config").build();
+  }
+
+  @Override
+  public void doUpdate() throws JAXBException {
+    Path configFile = determineConfigDirectory().resolve("config" + StoreConstants.FILE_EXTENSION);
+
+    if (configFile.toFile().exists()) {
+      ScmConfiguration config = configStore.get();
+      if (getPreUpdateScmConfigurationFromOldConfig(configFile).isAnonymousAccessEnabled()) {
+        config.setAnonymousMode(AnonymousMode.PROTOCOL_ONLY);
+      } else {
+        config.setAnonymousMode(AnonymousMode.OFF);
+      }
+    }
+  }
+
+  @Override
+  public Version getTargetVersion() {
+    return parse("2.4.0");
+  }
+
+  @Override
+  public String getAffectedDataType() {
+    return "config.xml";
+  }
+
+  private PreUpdateScmConfiguration getPreUpdateScmConfigurationFromOldConfig(Path configFile) throws JAXBException {
+    JAXBContext jaxbContext = JAXBContext.newInstance(AnonymousModeUpdateStep.PreUpdateScmConfiguration.class);
+    return (AnonymousModeUpdateStep.PreUpdateScmConfiguration) jaxbContext.createUnmarshaller().unmarshal(configFile.toFile());
+  }
+
+  private Path determineConfigDirectory() {
+    return new File(contextProvider.getBaseDirectory(), StoreConstants.CONFIG_DIRECTORY_NAME).toPath();
+  }
+
+  @XmlRootElement(name = "scm-config")
+  @XmlAccessorType(XmlAccessType.FIELD)
+  @NoArgsConstructor
+  @Getter
+  static class PreUpdateScmConfiguration {
+    private boolean anonymousAccessEnabled;
+  }
+}