c@23: 
c@23: #include "VampJson.h"
c@23: #include "VampnProto.h"
c@23: 
c@31: #include "bits/RequestOrResponse.h"
c@32: #include "bits/PreservingPluginHandleMapper.h"
c@31: 
c@23: #include <iostream>
c@23: #include <sstream>
c@23: #include <stdexcept>
c@23: 
c@23: using namespace std;
c@23: using namespace json11;
c@23: using namespace vampipe;
c@23: 
c@23: void usage()
c@23: {
c@23:     string myname = "vampipe-convert";
c@23:     cerr << "\n" << myname <<
c@24: 	": Validate and convert Vamp request and response messages\n\n"
c@24: 	"    Usage: " << myname << " [-i <informat>] [-o <outformat>] request\n"
c@24: 	"           " << myname << " [-i <informat>] [-o <outformat>] response\n\n"
c@24: 	"    where\n"
c@24: 	"       <informat>: the format to read from stdin\n"
c@24: 	"           (\"json\" or \"capnp\", default is \"json\")\n"
c@24: 	"       <outformat>: the format to convert to and write to stdout\n"
c@44: 	"           (\"json\", \"json-b64\" or \"capnp\", default is \"json\")\n"
c@44: 	"       request|response: whether messages are Vamp request or response type\n\n"
c@24: 	"If <informat> and <outformat> differ, convert from <informat> to <outformat>.\n"
c@24: 	"If <informat> and <outformat> are the same, just check validity of incoming\n"
c@44: 	"messages and pass them to output.\n\n"
c@44: 	"Specifying \"json-b64\" as output format forces base64 encoding for process and\n"
c@44: 	"feature blocks, unlike the \"json\" output format which uses text encoding.\n"
c@44: 	"The \"json\" input format accepts either.\n\n";
c@24: 
c@23:     exit(2);
c@23: }
c@23: 
c@24: Json
c@24: convertRequestJson(string input)
c@24: {
c@24:     string err;
c@24:     Json j = Json::parse(input, err);
c@24:     if (err != "") {
c@24: 	throw VampJson::Failure("invalid json: " + err);
c@24:     }
c@24:     if (!j.is_object()) {
c@24: 	throw VampJson::Failure("object expected at top level");
c@24:     }
c@24:     if (!j["type"].is_string()) {
c@24: 	throw VampJson::Failure("string expected for type field");
c@24:     }
c@42:     if (!j["content"].is_null() && !j["content"].is_object()) {
c@24: 	throw VampJson::Failure("object expected for content field");
c@24:     }
c@24:     return j;
c@24: }
c@24: 
c@24: Json
c@24: convertResponseJson(string input)
c@24: {
c@24:     string err;
c@24:     Json j = Json::parse(input, err);
c@24:     if (err != "") {
c@24: 	throw VampJson::Failure("invalid json: " + err);
c@24:     }
c@24:     if (!j.is_object()) {
c@24: 	throw VampJson::Failure("object expected at top level");
c@24:     }
c@24:     if (!j["success"].is_bool()) {
c@24: 	throw VampJson::Failure("bool expected for success field");
c@24:     }
c@24:     if (!j["content"].is_object()) {
c@24: 	throw VampJson::Failure("object expected for content field");
c@24:     }
c@24:     return j;
c@24: }
c@24: 
c@30: //!!! Lots of potential for refactoring the conversion classes based
c@30: //!!! on the common matter in the following eight functions...
c@30: 
c@32: PreservingPluginHandleMapper mapper;
c@32: 
c@23: RequestOrResponse
c@24: readRequestJson()
c@23: {
c@23:     RequestOrResponse rr;
c@24:     rr.direction = RequestOrResponse::Request;
c@24: 
c@24:     string input;
c@24:     if (!getline(cin, input)) {
c@25: 	rr.type = RRType::NotValid;
c@24: 	return rr;
c@24:     }
c@24:     
c@24:     Json j = convertRequestJson(input);
c@27: 
c@25:     rr.type = VampJson::getRequestResponseType(j);
c@44:     VampJson::BufferSerialisation serialisation = VampJson::BufferSerialisation::Text;
c@24: 
c@27:     switch (rr.type) {
c@27: 
c@27:     case RRType::List:
c@27: 	VampJson::toVampRequest_List(j); // type check only
c@27: 	break;
c@27:     case RRType::Load:
c@24: 	rr.loadRequest = VampJson::toVampRequest_Load(j);
c@27: 	break;
c@27:     case RRType::Configure:
c@32: 	rr.configurationRequest = VampJson::toVampRequest_Configure(j, mapper);
c@27: 	break;
c@27:     case RRType::Process:
c@44: 	rr.processRequest = VampJson::toVampRequest_Process(j, mapper, serialisation);
c@27: 	break;
c@27:     case RRType::Finish:
c@55: 	rr.finishRequest = VampJson::toVampRequest_Finish(j, mapper);
c@27: 	break;
c@27:     case RRType::NotValid:
c@27: 	break;
c@24:     }
c@24: 
c@24:     return rr;
c@24: }
c@24: 
c@24: void
c@44: writeRequestJson(RequestOrResponse &rr, bool useBase64)
c@24: {
c@24:     Json j;
c@24: 
c@54:     VampJson::BufferSerialisation serialisation =
c@54:         (useBase64 ?
c@54:          VampJson::BufferSerialisation::Base64 :
c@54:          VampJson::BufferSerialisation::Text);
c@54: 
c@27:     switch (rr.type) {
c@27: 
c@27:     case RRType::List:
c@24: 	j = VampJson::fromVampRequest_List();
c@27: 	break;
c@27:     case RRType::Load:
c@24: 	j = VampJson::fromVampRequest_Load(rr.loadRequest);
c@27: 	break;
c@27:     case RRType::Configure:
c@32: 	j = VampJson::fromVampRequest_Configure(rr.configurationRequest, mapper);
c@27: 	break;
c@27:     case RRType::Process:
c@44: 	j = VampJson::fromVampRequest_Process
c@54: 	    (rr.processRequest, mapper, serialisation);
c@27: 	break;
c@27:     case RRType::Finish:
c@55: 	j = VampJson::fromVampRequest_Finish(rr.finishRequest, mapper);
c@27: 	break;
c@27:     case RRType::NotValid:
c@27: 	break;
c@24:     }
c@24: 
c@24:     cout << j.dump() << endl;
c@24: }
c@24: 
c@24: RequestOrResponse
c@24: readResponseJson()
c@24: {
c@24:     RequestOrResponse rr;
c@24:     rr.direction = RequestOrResponse::Response;
c@24: 
c@23:     string input;
c@23:     if (!getline(cin, input)) {
c@25: 	rr.type = RRType::NotValid;
c@23: 	return rr;
c@23:     }
c@23: 
c@24:     Json j = convertResponseJson(input);
c@27: 
c@25:     rr.type = VampJson::getRequestResponseType(j);
c@44:     VampJson::BufferSerialisation serialisation = VampJson::BufferSerialisation::Text;
c@23: 
c@52:     rr.success = j["success"].bool_value();
c@52:     rr.errorText = j["errorText"].string_value();
c@52: 
c@27:     switch (rr.type) {
c@27: 
c@27:     case RRType::List:
c@24: 	rr.listResponse = VampJson::toVampResponse_List(j);
c@27: 	break;
c@27:     case RRType::Load:
c@32: 	rr.loadResponse = VampJson::toVampResponse_Load(j, mapper);
c@27: 	break;
c@27:     case RRType::Configure:
c@55: 	rr.configurationResponse = VampJson::toVampResponse_Configure(j, mapper);
c@27: 	break;
c@27:     case RRType::Process: 
c@51: 	rr.processResponse = VampJson::toVampResponse_Process(j, mapper, serialisation);
c@27: 	break;
c@27:     case RRType::Finish:
c@51: 	rr.finishResponse = VampJson::toVampResponse_Finish(j, mapper, serialisation);
c@27: 	break;
c@27:     case RRType::NotValid:
c@27: 	break;
c@23:     }
c@23: 
c@23:     return rr;
c@23: }
c@23: 
c@24: void
c@44: writeResponseJson(RequestOrResponse &rr, bool useBase64)
c@24: {
c@24:     Json j;
c@24: 
c@53:     VampJson::BufferSerialisation serialisation =
c@54:         (useBase64 ?
c@53:          VampJson::BufferSerialisation::Base64 :
c@53:          VampJson::BufferSerialisation::Text);
c@53: 
c@52:     if (!rr.success) {
c@27: 
c@52: 	j = VampJson::fromError(rr.errorText, rr.type);
c@52: 
c@52:     } else {
c@52:     
c@52: 	switch (rr.type) {
c@52: 
c@52: 	case RRType::List:
c@59: 	    j = VampJson::fromVampResponse_List(rr.listResponse);
c@52: 	    break;
c@52: 	case RRType::Load:
c@52: 	    j = VampJson::fromVampResponse_Load(rr.loadResponse, mapper);
c@52: 	    break;
c@52: 	case RRType::Configure:
c@55: 	    j = VampJson::fromVampResponse_Configure(rr.configurationResponse,
c@55:                                                      mapper);
c@52: 	    break;
c@52: 	case RRType::Process:
c@52: 	    j = VampJson::fromVampResponse_Process
c@53: 		(rr.processResponse, mapper, serialisation);
c@52: 	    break;
c@52: 	case RRType::Finish:
c@52: 	    j = VampJson::fromVampResponse_Finish
c@53: 		(rr.finishResponse, mapper, serialisation);
c@52: 	    break;
c@52: 	case RRType::NotValid:
c@52: 	    break;
c@52: 	}
c@24:     }
c@52:     
c@27:     cout << j.dump() << endl;
c@27: }
c@25: 
c@27: RequestOrResponse
c@33: readRequestCapnp(kj::BufferedInputStreamWrapper &buffered)
c@27: {
c@27:     RequestOrResponse rr;
c@27:     rr.direction = RequestOrResponse::Request;
c@27: 
c@33:     ::capnp::InputStreamMessageReader message(buffered);
c@27:     VampRequest::Reader reader = message.getRoot<VampRequest>();
c@27:     
c@27:     rr.type = VampnProto::getRequestResponseType(reader);
c@27: 
c@27:     switch (rr.type) {
c@27: 
c@27:     case RRType::List:
c@27: 	VampnProto::readVampRequest_List(reader); // type check only
c@27: 	break;
c@27:     case RRType::Load:
c@27: 	VampnProto::readVampRequest_Load(rr.loadRequest, reader);
c@27: 	break;
c@27:     case RRType::Configure:
c@32: 	VampnProto::readVampRequest_Configure(rr.configurationRequest,
c@32: 					      reader, mapper);
c@27: 	break;
c@27:     case RRType::Process:
c@32: 	VampnProto::readVampRequest_Process(rr.processRequest, reader, mapper);
c@27: 	break;
c@27:     case RRType::Finish:
c@55: 	VampnProto::readVampRequest_Finish(rr.finishRequest, reader, mapper);
c@27: 	break;
c@27:     case RRType::NotValid:
c@27: 	break;
c@27:     }
c@27: 
c@27:     return rr;
c@27: }
c@27: 
c@29: void
c@29: writeRequestCapnp(RequestOrResponse &rr)
c@29: {
c@29:     ::capnp::MallocMessageBuilder message;
c@29:     VampRequest::Builder builder = message.initRoot<VampRequest>();
c@29: 
c@29:     switch (rr.type) {
c@29: 
c@29:     case RRType::List:
c@29: 	VampnProto::buildVampRequest_List(builder);
c@29: 	break;
c@29:     case RRType::Load:
c@29: 	VampnProto::buildVampRequest_Load(builder, rr.loadRequest);
c@29: 	break;
c@29:     case RRType::Configure:
c@29: 	VampnProto::buildVampRequest_Configure(builder,
c@32: 					       rr.configurationRequest, mapper);
c@29: 	break;
c@29:     case RRType::Process:
c@32: 	VampnProto::buildVampRequest_Process(builder, rr.processRequest, mapper);
c@29: 	break;
c@29:     case RRType::Finish:
c@55: 	VampnProto::buildVampRequest_Finish(builder, rr.finishRequest, mapper);
c@29: 	break;
c@29:     case RRType::NotValid:
c@29: 	break;
c@29:     }
c@29: 
c@33:     writeMessageToFd(1, message);
c@29: }
c@29: 
c@27: RequestOrResponse
c@33: readResponseCapnp(kj::BufferedInputStreamWrapper &buffered)
c@27: {
c@27:     RequestOrResponse rr;
c@27:     rr.direction = RequestOrResponse::Response;
c@27: 
c@33:     ::capnp::InputStreamMessageReader message(buffered);
c@27:     VampResponse::Reader reader = message.getRoot<VampResponse>();
c@27:     
c@27:     rr.type = VampnProto::getRequestResponseType(reader);
c@52:     rr.success = reader.getSuccess();
c@52:     rr.errorText = reader.getErrorText();
c@27: 
c@27:     switch (rr.type) {
c@27: 
c@27:     case RRType::List:
c@27: 	VampnProto::readVampResponse_List(rr.listResponse, reader);
c@27: 	break;
c@27:     case RRType::Load:
c@32: 	VampnProto::readVampResponse_Load(rr.loadResponse, reader, mapper);
c@27: 	break;
c@27:     case RRType::Configure:
c@27: 	VampnProto::readVampResponse_Configure(rr.configurationResponse,
c@55: 					       reader, mapper);
c@27: 	break;
c@27:     case RRType::Process:
c@51: 	VampnProto::readVampResponse_Process(rr.processResponse, reader, mapper);
c@27: 	break;
c@27:     case RRType::Finish:
c@51: 	VampnProto::readVampResponse_Finish(rr.finishResponse, reader, mapper);
c@27: 	break;
c@27:     case RRType::NotValid:
c@27: 	break;
c@27:     }
c@27: 
c@27:     return rr;
c@24: }
c@24: 
c@29: void
c@29: writeResponseCapnp(RequestOrResponse &rr)
c@29: {
c@29:     ::capnp::MallocMessageBuilder message;
c@29:     VampResponse::Builder builder = message.initRoot<VampResponse>();
c@29: 
c@52:     if (!rr.success) {
c@29: 
c@52: 	VampnProto::buildVampResponse_Error(builder, rr.errorText, rr.type);
c@52: 
c@52:     } else {
c@52: 	
c@52: 	switch (rr.type) {
c@52: 
c@52: 	case RRType::List:
c@56: 	    VampnProto::buildVampResponse_List(builder, rr.listResponse);
c@52: 	    break;
c@52: 	case RRType::Load:
c@52: 	    VampnProto::buildVampResponse_Load(builder, rr.loadResponse, mapper);
c@52: 	    break;
c@52: 	case RRType::Configure:
c@55: 	    VampnProto::buildVampResponse_Configure(builder, rr.configurationResponse, mapper);
c@52: 	    break;
c@52: 	case RRType::Process:
c@52: 	    VampnProto::buildVampResponse_Process(builder, rr.processResponse, mapper);
c@52: 	    break;
c@52: 	case RRType::Finish:
c@52: 	    VampnProto::buildVampResponse_Finish(builder, rr.finishResponse, mapper);
c@52: 	    break;
c@52: 	case RRType::NotValid:
c@52: 	    break;
c@52: 	}
c@29:     }
c@52:     
c@33:     writeMessageToFd(1, message);
c@33: }
c@33: 
c@33: RequestOrResponse
c@33: readInputJson(RequestOrResponse::Direction direction)
c@33: {
c@33:     if (direction == RequestOrResponse::Request) {
c@33: 	return readRequestJson();
c@33:     } else {
c@33: 	return readResponseJson();
c@33:     }
c@33: }
c@33: 
c@33: RequestOrResponse
c@33: readInputCapnp(RequestOrResponse::Direction direction)
c@33: {
c@33:     static kj::FdInputStream stream(0); // stdin
c@33:     static kj::BufferedInputStreamWrapper buffered(stream);
c@33: 
c@33:     if (buffered.tryGetReadBuffer() == nullptr) {
c@33: 	return {};
c@33:     }
c@33:     
c@33:     if (direction == RequestOrResponse::Request) {
c@33: 	return readRequestCapnp(buffered);
c@33:     } else {
c@33: 	return readResponseCapnp(buffered);
c@33:     }
c@29: }
c@29: 
c@23: RequestOrResponse
c@24: readInput(string format, RequestOrResponse::Direction direction)
c@23: {
c@23:     if (format == "json") {
c@33: 	return readInputJson(direction);
c@27:     } else if (format == "capnp") {
c@33: 	return readInputCapnp(direction);
c@23:     } else {
c@27: 	throw runtime_error("unknown input format \"" + format + "\"");
c@23:     }
c@23: }
c@23: 
c@23: void
c@24: writeOutput(string format, RequestOrResponse &rr)
c@23: {
c@24:     if (format == "json") {
c@24: 	if (rr.direction == RequestOrResponse::Request) {
c@44: 	    writeRequestJson(rr, false);
c@24: 	} else {
c@44: 	    writeResponseJson(rr, false);
c@44: 	}
c@44:     } else if (format == "json-b64") {
c@44: 	if (rr.direction == RequestOrResponse::Request) {
c@44: 	    writeRequestJson(rr, true);
c@44: 	} else {
c@44: 	    writeResponseJson(rr, true);
c@24: 	}
c@29:     } else if (format == "capnp") {
c@29: 	if (rr.direction == RequestOrResponse::Request) {
c@29: 	    writeRequestCapnp(rr);
c@29: 	} else {
c@29: 	    writeResponseCapnp(rr);
c@29: 	}
c@24:     } else {
c@27: 	throw runtime_error("unknown output format \"" + format + "\"");
c@24:     }
c@23: }
c@23: 
c@23: int main(int argc, char **argv)
c@23: {
c@24:     if (argc < 2) {
c@23: 	usage();
c@23:     }
c@23: 
c@24:     string informat = "json", outformat = "json";
c@27:     RequestOrResponse::Direction direction = RequestOrResponse::Request;
c@24:     bool haveDirection = false;
c@23:     
c@24:     for (int i = 1; i < argc; ++i) {
c@23: 
c@23: 	string arg = argv[i];
c@24: 	bool final = (i + 1 == argc);
c@23: 	
c@23: 	if (arg == "-i") {
c@27: 	    if (final) usage();
c@23: 	    else informat = argv[++i];
c@23: 
c@23: 	} else if (arg == "-o") {
c@27: 	    if (final) usage();
c@23: 	    else outformat = argv[++i];
c@23: 
c@24: 	} else if (arg == "request") {
c@24: 	    direction = RequestOrResponse::Request;
c@24: 	    haveDirection = true;
c@24: 
c@24: 	} else if (arg == "response") {
c@24: 	    direction = RequestOrResponse::Response;
c@24: 	    haveDirection = true;
c@24: 	    
c@23: 	} else {
c@23: 	    usage();
c@23: 	}
c@23:     }
c@23: 
c@24:     if (informat == "" || outformat == "" || !haveDirection) {
c@23: 	usage();
c@23:     }
c@23: 
c@23:     while (true) {
c@23: 
c@23: 	try {
c@23: 
c@24: 	    RequestOrResponse rr = readInput(informat, direction);
c@29: 
c@29: 	    // NotValid without an exception indicates EOF:
c@25: 	    if (rr.type == RRType::NotValid) break;
c@29: 
c@23: 	    writeOutput(outformat, rr);
c@23: 	    
c@23: 	} catch (std::exception &e) {
c@52: 
c@23: 	    cerr << "Error: " << e.what() << endl;
c@23: 	    exit(1);
c@23: 	}
c@23:     }
c@23: 
c@23:     exit(0);
c@23: }
c@23: 
c@23: