feat: Add tooling support to google provider (#237)

providers/GoogleMessage.hpp

@@ -0,0 +1,62 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QHash>
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QObject>
+
+#include <llmcore/ContentBlocks.hpp>
+
+namespace QodeAssist::Providers {
+
+class GoogleMessage : public QObject
+{
+    Q_OBJECT
+public:
+    explicit GoogleMessage(QObject *parent = nullptr);
+
+    void handleContentDelta(const QString &text);
+    void handleFunctionCallStart(const QString &name);
+    void handleFunctionCallArgsDelta(const QString &argsJson);
+    void handleFunctionCallComplete();
+    void handleFinishReason(const QString &reason);
+
+    QJsonObject toProviderFormat() const;
+    QJsonArray createToolResultParts(const QHash<QString, QString> &toolResults) const;
+
+    QList<LLMCore::ToolUseContent *> getCurrentToolUseContent() const;
+    QList<LLMCore::ContentBlock *> currentBlocks() const { return m_currentBlocks; }
+
+    LLMCore::MessageState state() const { return m_state; }
+    void startNewContinuation();
+
+private:
+    void updateStateFromFinishReason();
+
+    QList<LLMCore::ContentBlock *> m_currentBlocks;
+    QString m_pendingFunctionArgs;
+    QString m_currentFunctionName;
+    QString m_finishReason;
+    LLMCore::MessageState m_state = LLMCore::MessageState::Building;
+};
+
+} // namespace QodeAssist::Providers