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logos-protocol/cpp/logos_api_client.h
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#ifndef LOGOS_API_CLIENT_H
#define LOGOS_API_CLIENT_H
#include <QObject>
#include <QString>
#include <QVariant>
#include <QVariantList>
#include <QMap>
#include <functional>
#include <string>
#include <vector>
#include "logos_call_error.h"
#include "logos_mode.h"
#include "logos_transport_config.h"
#include <nlohmann/json.hpp>
class LogosAPI;
class LogosAPIConsumer;
class LogosObject;
class TokenManager;
/**
* @brief LogosAPIClient provides a high-level interface for remote method calls
*
* This class serves as a facade over LogosAPIConsumer, providing a clean interface
* for applications that need to call remote methods and handle events.
*/
class LogosAPIClient : public QObject
{
Q_OBJECT
public:
/**
* @brief Construct a client with explicit transports for both the
* target module *and* `capability_module`.
*
* Two transports because the SDK's auto-`requestModule` flow inside
* invokeRemoteMethod{,Async} dials `capability_module` to fetch a
* per-target token. When the daemon advertises capability_module on
* a different transport from the target (e.g. CLI on host →
* core_service over TCP, but capability_module also over TCP on a
* sibling port), the auto-dial must use the right one. Pre-building
* the consumer once in the constructor (see m_capability_consumer)
* keeps the hot path free of per-call lookups.
*/
LogosAPIClient(const QString& module_to_talk_to,
const QString& origin_module,
TokenManager* token_manager,
const LogosTransportConfig& target_transport,
const LogosTransportConfig& capability_transport,
QObject *parent = nullptr);
/**
* @brief No-transport constructor — both target and
* capability_module use the process-global default
* (LocalSocket) via LogosTransportConfigGlobal::getDefault().
*/
explicit LogosAPIClient(const QString& module_to_talk_to,
const QString& origin_module,
TokenManager* token_manager,
QObject *parent = nullptr);
~LogosAPIClient();
/**
* @brief Request a LogosObject handle by name
* @return LogosObject* handle, or nullptr if failed
*/
LogosObject* requestObject(const QString& objectName, Timeout timeout = Timeout());
bool isConnected() const;
QString registryUrl() const;
bool reconnect();
QVariant invokeRemoteMethod(const QString& objectName, const QString& methodName,
const QVariantList& args = QVariantList(), Timeout timeout = Timeout());
/**
* @brief invokeRemoteMethod with an explicit error out-channel.
*
* Fills *err with the canonical {code, message, origin} call error when
* the failure is detectable (today: "object_unavailable" when the target
* object cannot be acquired); cleared on success. Generated typed client
* wrappers call this overload and throw logos::LogosCallError so callers
* can distinguish a failed call from a legitimately default-valued
* result.
*/
QVariant invokeRemoteMethod(const QString& objectName, const QString& methodName,
const QVariantList& args, Timeout timeout, logos::CallError* err);
QVariant invokeRemoteMethod(const QString& objectName, const QString& methodName,
const QVariant& arg, Timeout timeout = Timeout());
QVariant invokeRemoteMethod(const QString& objectName, const QString& methodName,
const QVariant& arg1, const QVariant& arg2, Timeout timeout = Timeout());
QVariant invokeRemoteMethod(const QString& objectName, const QString& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3, Timeout timeout = Timeout());
QVariant invokeRemoteMethod(const QString& objectName, const QString& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
const QVariant& arg4, Timeout timeout = Timeout());
QVariant invokeRemoteMethod(const QString& objectName, const QString& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
const QVariant& arg4, const QVariant& arg5, Timeout timeout = Timeout());
// const char* overloads — resolve ambiguity for string literals
QVariant invokeRemoteMethod(const char* objectName, const char* methodName,
const QVariantList& args = QVariantList(), Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString(objectName), QString(methodName), args, timeout); }
QVariant invokeRemoteMethod(const char* objectName, const char* methodName,
const QVariant& arg, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString(objectName), QString(methodName), arg, timeout); }
QVariant invokeRemoteMethod(const char* objectName, const char* methodName,
const QVariant& arg1, const QVariant& arg2, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString(objectName), QString(methodName), arg1, arg2, timeout); }
QVariant invokeRemoteMethod(const char* objectName, const char* methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString(objectName), QString(methodName), arg1, arg2, arg3, timeout); }
QVariant invokeRemoteMethod(const char* objectName, const char* methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
const QVariant& arg4, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString(objectName), QString(methodName), arg1, arg2, arg3, arg4, timeout); }
QVariant invokeRemoteMethod(const char* objectName, const char* methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
const QVariant& arg4, const QVariant& arg5, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString(objectName), QString(methodName), arg1, arg2, arg3, arg4, arg5, timeout); }
// std::string overloads — thin wrappers that convert internally
QVariant invokeRemoteMethod(const std::string& objectName, const std::string& methodName,
const QVariantList& args = QVariantList(), Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString::fromStdString(objectName), QString::fromStdString(methodName), args, timeout); }
QVariant invokeRemoteMethod(const std::string& objectName, const std::string& methodName,
const QVariant& arg, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString::fromStdString(objectName), QString::fromStdString(methodName), arg, timeout); }
QVariant invokeRemoteMethod(const std::string& objectName, const std::string& methodName,
const QVariant& arg1, const QVariant& arg2, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString::fromStdString(objectName), QString::fromStdString(methodName), arg1, arg2, timeout); }
QVariant invokeRemoteMethod(const std::string& objectName, const std::string& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString::fromStdString(objectName), QString::fromStdString(methodName), arg1, arg2, arg3, timeout); }
QVariant invokeRemoteMethod(const std::string& objectName, const std::string& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
const QVariant& arg4, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString::fromStdString(objectName), QString::fromStdString(methodName), arg1, arg2, arg3, arg4, timeout); }
QVariant invokeRemoteMethod(const std::string& objectName, const std::string& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
const QVariant& arg4, const QVariant& arg5, Timeout timeout = Timeout())
{ return invokeRemoteMethod(QString::fromStdString(objectName), QString::fromStdString(methodName), arg1, arg2, arg3, arg4, arg5, timeout); }
// const char* onEvent overload
void onEvent(LogosObject* originObject, const char* eventName,
std::function<void(const QString&, const QVariantList&)> callback)
{ onEvent(originObject, QString(eventName), callback); }
// std::string onEvent overloads
void onEvent(LogosObject* originObject, const std::string& eventName,
std::function<void(const QString&, const QVariantList&)> callback)
{ onEvent(originObject, QString::fromStdString(eventName), callback); }
void onEvent(LogosObject* originObject, const std::string& eventName,
std::function<void(const std::string&, const QVariantList&)> callback)
{
onEvent(originObject, QString::fromStdString(eventName),
[cb = std::move(callback)](const QString& name, const QVariantList& args) {
cb(name.toStdString(), args);
});
}
void onEvent(LogosObject* originObject, const char* eventName,
std::function<void(const std::string&, const QVariantList&)> callback)
{
onEvent(originObject, QString(eventName),
[cb = std::move(callback)](const QString& name, const QVariantList& args) {
cb(name.toStdString(), args);
});
}
using AsyncResultCallback = std::function<void(QVariant)>;
/**
* @brief Async callback with an explicit error out-channel.
*
* Mirrors the sync `invokeRemoteMethod(..., CallError*)` overload. Set to
* code="object_unavailable" when the target object cannot be acquired,
* cleared on success. Callers that need to distinguish acquire failure
* from a legitimately empty QVariant result should use this overload.
*/
using AsyncResultErrorCallback = std::function<void(QVariant, const logos::CallError&)>;
void invokeRemoteMethodAsync(const QString& objectName, const QString& methodName,
const QVariantList& args, AsyncResultCallback callback,
Timeout timeout = Timeout());
/**
* @brief invokeRemoteMethodAsync with an explicit error out-channel.
* See AsyncResultErrorCallback docs above.
*/
void invokeRemoteMethodAsync(const QString& objectName, const QString& methodName,
const QVariantList& args, AsyncResultErrorCallback callback,
Timeout timeout = Timeout());
void invokeRemoteMethodAsync(const QString& objectName, const QString& methodName,
const QVariant& arg, AsyncResultCallback callback,
Timeout timeout = Timeout());
void invokeRemoteMethodAsync(const QString& objectName, const QString& methodName,
const QVariant& arg1, const QVariant& arg2,
AsyncResultCallback callback, Timeout timeout = Timeout());
void invokeRemoteMethodAsync(const QString& objectName, const QString& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
AsyncResultCallback callback, Timeout timeout = Timeout());
void invokeRemoteMethodAsync(const QString& objectName, const QString& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
const QVariant& arg4, AsyncResultCallback callback,
Timeout timeout = Timeout());
void invokeRemoteMethodAsync(const QString& objectName, const QString& methodName,
const QVariant& arg1, const QVariant& arg2, const QVariant& arg3,
const QVariant& arg4, const QVariant& arg5,
AsyncResultCallback callback, Timeout timeout = Timeout());
/**
* @brief Register an event listener via LogosObject's callback mechanism
* @param originObject The LogosObject that will emit the event
* @param eventName The name of the event to listen for
* @param callback Function to call when the event is triggered
*/
void onEvent(LogosObject* originObject, const QString& eventName,
std::function<void(const QString&, const QVariantList&)> callback);
/**
* @brief Emit an event on a LogosObject (for plugins that act as event sources)
* @param object The LogosObject to emit the event on
* @param eventName The name of the event
* @param data The event data
*/
void onEventResponse(LogosObject* object, const QString& eventName, const QVariantList& data);
/**
* @brief Backward-compatible overload for QObject-based plugins.
*
* Old-API plugins call onEventResponse(this, ...) where `this` is a QObject*.
* This overload invokes the eventResponse signal on the QObject via QMetaObject.
*/
void onEventResponse(QObject* object, const QString& eventName, const QVariantList& data);
bool informModuleToken(const QString& authToken, const QString& moduleName, const QString& token);
bool informModuleToken(const char* authToken, const char* moduleName, const char* token)
{ return informModuleToken(QString(authToken), QString(moduleName), QString(token)); }
bool informModuleToken(const std::string& authToken, const std::string& moduleName, const std::string& token);
bool informModuleToken_module(const QString& authToken, const QString& originModule, const QString& moduleName, const QString& token);
TokenManager* getTokenManager() const;
QString getToken(const QString& module_name);
// nlohmann::json overloads — args is a JSON array, result is a JSON value.
// These convert between nlohmann::json and QVariant internally so callers
// never need to touch Qt JSON types.
nlohmann::json invokeRemoteMethod(const std::string& objectName,
const std::string& methodName,
const nlohmann::json& args,
Timeout timeout = Timeout());
// nlohmann::json event callback overload — data arrives as a json array.
void onEvent(LogosObject* originObject, const std::string& eventName,
std::function<void(const std::string&, const nlohmann::json&)> callback);
private:
// ABI note: this private layout is consumed by every plugin that
// statically links libsdk. Adding a new field in the middle of
// this section shifts the offsets of subsequent fields and
// SILENTLY breaks any plugin compiled before the change — it
// reads m_token_manager at the wrong offset and segfaults on
// the first cross-process call. New private members MUST be
// appended to the end. (Long-term cure: pimpl this class so
// sizeof / offsets become opaque to consumers.)
LogosAPIConsumer* m_consumer;
QMap<QString, QString> m_tokens;
TokenManager* m_token_manager;
QString m_origin_module;
// Pre-built consumer for the auto-`requestModule` token-fetch path
// in invokeRemoteMethod{,Async}. Constructed once with the right
// transport (see the two-transport ctor) so the hot path doesn't
// chase a back-pointer to LogosAPI just to look up the transport
// registry. Null only when `m_consumer` itself is for
// capability_module (no recursion). In-class default to nullptr
// so any old constructor that doesn't list this field still
// leaves a defined value.
LogosAPIConsumer* m_capability_consumer = nullptr;
// Per-target queue of continuations waiting on an in-flight async
// requestModule handshake. The FIRST async call to an un-tokened target
// starts exactly one handshake; concurrent calls to the same target queue
// here and all drain with the single minted token when it resolves. Without
// this coalescing a fan-out of N first-calls fires N racing handshakes whose
// distinct tokens overwrite each other on the target — so already-dispatched
// calls carry a superseded token and get rejected. Touched only on the
// owner thread (invokeRemoteMethodAsync marshals there), so it needs no
// lock. Appended last per the ABI note above; defaults to empty.
QMap<QString, std::vector<std::function<void(const QString&)>>> m_pendingHandshakes;
};
#endif // LOGOS_API_CLIENT_H