+package org.asamk.signal.jsonrpc;
+
+import com.fasterxml.jackson.core.TreeNode;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ContainerNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import org.asamk.signal.commands.Command;
+import org.asamk.signal.commands.JsonRpcMultiCommand;
+import org.asamk.signal.commands.JsonRpcRegistrationCommand;
+import org.asamk.signal.commands.JsonRpcSingleCommand;
+import org.asamk.signal.commands.exceptions.CommandException;
+import org.asamk.signal.commands.exceptions.IOErrorException;
+import org.asamk.signal.commands.exceptions.UntrustedKeyErrorException;
+import org.asamk.signal.commands.exceptions.UserErrorException;
+import org.asamk.signal.manager.Manager;
+import org.asamk.signal.manager.MultiAccountManager;
+import org.asamk.signal.manager.RegistrationManager;
+import org.asamk.signal.output.JsonWriter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.channels.OverlappingFileLockException;
+import java.util.Map;
+import java.util.function.Function;
+
+public class SignalJsonRpcCommandHandler {
+
+ private final static Logger logger = LoggerFactory.getLogger(SignalJsonRpcDispatcherHandler.class);
+
+ private static final int USER_ERROR = -1;
+ private static final int IO_ERROR = -3;
+ private static final int UNTRUSTED_KEY_ERROR = -4;
+
+ private final Manager m;
+ private final MultiAccountManager c;
+ private final Function<String, Command> commandProvider;
+
+ public SignalJsonRpcCommandHandler(final Manager m, final Function<String, Command> commandProvider) {
+ this.c = null;
+ this.m = m;
+ this.commandProvider = commandProvider;
+ }
+
+ public SignalJsonRpcCommandHandler(final MultiAccountManager c, final Function<String, Command> commandProvider) {
+ this.c = c;
+ this.m = null;
+ this.commandProvider = commandProvider;
+ }
+
+ JsonNode handleRequest(
+ final ObjectMapper objectMapper, final String method, ContainerNode<?> params
+ ) throws JsonRpcException {
+ var command = getCommand(method);
+ if (c != null) {
+ if (command instanceof JsonRpcSingleCommand<?> jsonRpcCommand) {
+ final var manager = getManagerFromParams(params);
+ if (manager != null) {
+ return runCommand(objectMapper, params, new CommandRunnerImpl<>(manager, jsonRpcCommand));
+ }
+ }
+ if (command instanceof JsonRpcMultiCommand<?> jsonRpcCommand) {
+ return runCommand(objectMapper, params, new MultiCommandRunnerImpl<>(c, jsonRpcCommand));
+ }
+ if (command instanceof JsonRpcRegistrationCommand<?> jsonRpcCommand) {
+ try (var manager = getRegistrationManagerFromParams(params)) {
+ if (manager != null) {
+ return runCommand(objectMapper,
+ params,
+ new RegistrationCommandRunnerImpl<>(manager, c, jsonRpcCommand));
+ } else {
+ throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INVALID_PARAMS,
+ "Method requires valid account parameter",
+ null));
+ }
+ } catch (IOException e) {
+ logger.warn("Failed to close registration manager", e);
+ }
+ }
+ }
+ if (command instanceof JsonRpcSingleCommand<?> jsonRpcCommand) {
+ if (m != null) {
+ return runCommand(objectMapper, params, new CommandRunnerImpl<>(m, jsonRpcCommand));
+ }
+
+ final var manager = getManagerFromParams(params);
+ if (manager != null) {
+ return runCommand(objectMapper, params, new CommandRunnerImpl<>(manager, jsonRpcCommand));
+ } else {
+ throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INVALID_PARAMS,
+ "Method requires valid account parameter",
+ null));
+ }
+ }
+
+ throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.METHOD_NOT_FOUND,
+ "Method not implemented",
+ null));
+ }
+
+ private Manager getManagerFromParams(final ContainerNode<?> params) throws JsonRpcException {
+ if (params != null && params.hasNonNull("account")) {
+ final var manager = c.getManager(params.get("account").asText());
+ ((ObjectNode) params).remove("account");
+ if (manager == null) {
+ throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INVALID_PARAMS,
+ "Specified account does not exist",
+ null));
+ }
+ return manager;
+ }
+ return null;
+ }
+
+ private RegistrationManager getRegistrationManagerFromParams(final ContainerNode<?> params) {
+ if (params != null && params.has("account")) {
+ try {
+ final var registrationManager = c.getNewRegistrationManager(params.get("account").asText());
+ ((ObjectNode) params).remove("account");
+ return registrationManager;
+ } catch (OverlappingFileLockException e) {
+ logger.warn("Account is already in use");
+ return null;
+ } catch (IOException | IllegalStateException e) {
+ logger.warn("Failed to load registration manager", e);
+ return null;
+ }
+ }
+ return null;
+ }
+
+ private Command getCommand(final String method) {
+ return commandProvider.apply(method);
+ }
+
+ private record CommandRunnerImpl<T>(Manager m, JsonRpcSingleCommand<T> command) implements CommandRunner<T> {
+
+ @Override
+ public void handleCommand(final T request, final JsonWriter jsonWriter) throws CommandException {
+ command.handleCommand(request, m, jsonWriter);
+ }
+
+ @Override
+ public TypeReference<T> getRequestType() {
+ return command.getRequestType();
+ }
+ }
+
+ private record RegistrationCommandRunnerImpl<T>(
+ RegistrationManager m, MultiAccountManager c, JsonRpcRegistrationCommand<T> command
+ ) implements CommandRunner<T> {
+
+ @Override
+ public void handleCommand(final T request, final JsonWriter jsonWriter) throws CommandException {
+ command.handleCommand(request, m, jsonWriter);
+ }
+
+ @Override
+ public TypeReference<T> getRequestType() {
+ return command.getRequestType();
+ }
+ }
+
+ private record MultiCommandRunnerImpl<T>(
+ MultiAccountManager c, JsonRpcMultiCommand<T> command
+ ) implements CommandRunner<T> {
+
+ @Override
+ public void handleCommand(final T request, final JsonWriter jsonWriter) throws CommandException {
+ command.handleCommand(request, c, jsonWriter);
+ }
+
+ @Override
+ public TypeReference<T> getRequestType() {
+ return command.getRequestType();
+ }
+ }
+
+ interface CommandRunner<T> {
+
+ void handleCommand(T request, JsonWriter jsonWriter) throws CommandException;
+
+ TypeReference<T> getRequestType();
+ }
+
+ private JsonNode runCommand(
+ final ObjectMapper objectMapper, final ContainerNode<?> params, final CommandRunner<?> command
+ ) throws JsonRpcException {
+ final Object[] result = {null};
+ final JsonWriter commandJsonWriter = s -> {
+ if (result[0] != null) {
+ throw new AssertionError("Command may only write one json result");
+ }
+
+ result[0] = s;
+ };
+
+ try {
+ parseParamsAndRunCommand(objectMapper, params, commandJsonWriter, command);
+ } catch (JsonMappingException e) {
+ throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INVALID_REQUEST,
+ e.getMessage(),
+ null));
+ } catch (UserErrorException e) {
+ throw new JsonRpcException(new JsonRpcResponse.Error(USER_ERROR,
+ e.getMessage(),
+ getErrorDataNode(objectMapper, result)));
+ } catch (IOErrorException e) {
+ throw new JsonRpcException(new JsonRpcResponse.Error(IO_ERROR,
+ e.getMessage(),
+ getErrorDataNode(objectMapper, result)));
+ } catch (UntrustedKeyErrorException e) {
+ throw new JsonRpcException(new JsonRpcResponse.Error(UNTRUSTED_KEY_ERROR,
+ e.getMessage(),
+ getErrorDataNode(objectMapper, result)));
+ } catch (Throwable e) {
+ logger.error("Command execution failed", e);
+ throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INTERNAL_ERROR,
+ e.getMessage(),
+ getErrorDataNode(objectMapper, result)));
+ }
+
+ Object output = result[0] == null ? Map.of() : result[0];
+ return objectMapper.valueToTree(output);
+ }
+
+ private JsonNode getErrorDataNode(final ObjectMapper objectMapper, final Object[] result) {
+ if (result[0] == null) {
+ return null;
+ }
+ return objectMapper.valueToTree(Map.of("response", result[0]));
+ }
+
+ private <T> void parseParamsAndRunCommand(
+ final ObjectMapper objectMapper,
+ final TreeNode params,
+ final JsonWriter jsonWriter,
+ final CommandRunner<T> command
+ ) throws CommandException, JsonMappingException {
+ T requestParams = null;
+ final var requestType = command.getRequestType();
+ if (params != null && requestType != null) {
+ try {
+ requestParams = objectMapper.readValue(objectMapper.treeAsTokens(params), requestType);
+ } catch (JsonMappingException e) {
+ throw e;
+ } catch (IOException e) {
+ throw new AssertionError(e);
+ }
+ }
+ command.handleCommand(requestParams, jsonWriter);
+ }
+}
git.nmode.ca / signal-cli / commitdiff
