Add command to delete local account data

Fixes #912

src/main/java/org/asamk/signal/commands/Commands.java

@@ -13,6 +13,7 @@ public class Commands {
         addCommand(new AddDeviceCommand());
         addCommand(new BlockCommand());
         addCommand(new DaemonCommand());
+        addCommand(new DeleteLocalAccountDataCommand());
         addCommand(new FinishLinkCommand());
         addCommand(new GetUserStatusCommand());
         addCommand(new JoinGroupCommand());

src/main/java/org/asamk/signal/commands/DeleteLocalAccountDataCommand.java

@@ -0,0 +1,68 @@
+package org.asamk.signal.commands;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+
+import net.sourceforge.argparse4j.impl.Arguments;
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+
+import org.asamk.signal.OutputType;
+import org.asamk.signal.commands.exceptions.CommandException;
+import org.asamk.signal.commands.exceptions.IOErrorException;
+import org.asamk.signal.commands.exceptions.UserErrorException;
+import org.asamk.signal.manager.RegistrationManager;
+import org.asamk.signal.output.JsonWriter;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+public class DeleteLocalAccountDataCommand implements RegistrationCommand, JsonRpcRegistrationCommand<Map<String, Object>> {
+
+    @Override
+    public String getName() {
+        return "deleteLocalAccountData";
+    }
+
+    @Override
+    public void attachToSubparser(final Subparser subparser) {
+        subparser.help(
+                "Delete all local data for this account. Data should only be deleted if the account is unregistered. CAUTION: This cannot be undone.");
+        subparser.addArgument("--ignore-registered")
+                .help("Delete the account data even though the account is still registered on the Signal servers.")
+                .action(Arguments.storeTrue());
+    }
+
+    @Override
+    public void handleCommand(final Namespace ns, final RegistrationManager m) throws CommandException {
+        try {
+            final var ignoreRegistered = Boolean.TRUE.equals(ns.getBoolean("ignore-registered"));
+            if (m.isRegistered() && !ignoreRegistered) {
+                throw new UserErrorException(
+                        "Not deleting account, it is still registered. Use --ignore-registered to delete it anyway.");
+            }
+
+            m.deleteLocalAccountData();
+        } catch (IOException e) {
+            throw new IOErrorException("Deletion error: " + e.getMessage(), e);
+        }
+    }
+
+    @Override
+    public TypeReference<Map<String, Object>> getRequestType() {
+        return new TypeReference<>() {};
+    }
+
+    @Override
+    public List<OutputType> getSupportedOutputTypes() {
+        return List.of(OutputType.PLAIN_TEXT, OutputType.JSON);
+    }
+
+    @Override
+    public void handleCommand(
+            Map<String, Object> request, RegistrationManager m, JsonWriter jsonWriter
+    ) throws CommandException {
+        Namespace commandNamespace = new JsonRpcNamespace(request == null ? Map.of() : request);
+        handleCommand(commandNamespace, m);
+    }
+}

src/main/java/org/asamk/signal/dbus/DbusRegistrationManagerImpl.java

@@ -47,6 +47,16 @@ public class DbusRegistrationManagerImpl implements RegistrationManager {
         }
     }
 
+    @Override
+    public void deleteLocalAccountData() throws IOException {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isRegistered() {
+        throw new UnsupportedOperationException();
+    }
+
     @Override
     public void close() {
     }