Implement startLink and finishLink for jsonrpc daemon

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

@@ -0,0 +1,73 @@
+package org.asamk.signal.commands;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+
+import org.asamk.signal.JsonWriter;
+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.MultiAccountManager;
+import org.asamk.signal.manager.UserAlreadyExists;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.concurrent.TimeoutException;
+
+public class FinishLinkCommand implements JsonRpcMultiCommand<FinishLinkCommand.FinishLinkParams> {
+
+    private final static Logger logger = LoggerFactory.getLogger(FinishLinkCommand.class);
+
+    @Override
+    public String getName() {
+        return "finishLink";
+    }
+
+    @Override
+    public TypeReference<FinishLinkParams> getRequestType() {
+        return new TypeReference<>() {};
+    }
+
+    @Override
+    public void handleCommand(
+            final FinishLinkParams request, final MultiAccountManager m, final JsonWriter jsonWriter
+    ) throws CommandException {
+        final URI deviceLinkUri;
+        try {
+            deviceLinkUri = new URI(request.deviceLinkUri());
+        } catch (URISyntaxException e) {
+            throw new UserErrorException("Invalid device link uri.");
+        }
+        final var provisioningManager = m.getProvisioningManagerFor(deviceLinkUri);
+        if (provisioningManager == null) {
+            throw new UserErrorException("Unknown device link uri.");
+        }
+
+        var deviceName = request.deviceName();
+        if (deviceName == null) {
+            deviceName = "cli";
+        }
+        final String number;
+        try {
+            number = provisioningManager.finishDeviceLink(deviceName);
+        } catch (TimeoutException e) {
+            throw new UserErrorException("Link request timed out, please try again.");
+        } catch (IOException e) {
+            throw new IOErrorException("Link request error: " + e.getMessage(), e);
+        } catch (UserAlreadyExists e) {
+            throw new UserErrorException("The user "
+                    + e.getNumber()
+                    + " already exists\nDelete \""
+                    + e.getFileName()
+                    + "\" before trying again.");
+        }
+
+        jsonWriter.write(new JsonFinishLink(number));
+    }
+
+    record FinishLinkParams(String deviceLinkUri, String deviceName) {}
+
+    private record JsonFinishLink(String number) {}
+}