chore: restructure llm plugin to be more coherent & fix various bugs in llm ui

Plugins/ZShell/Llm/workspace.cpp

@@ -0,0 +1,89 @@
+#include "workspace.hpp"
+
+#include "session.hpp"
+
+#include <QDebug>
+#include <QDir>
+#include <QFile>
+#include <QFileInfo>
+#include <QMimeDatabase>
+#include <QStandardPaths>
+
+namespace ZShell::llm {
+
+Workspace::Workspace(ChatSession* session, QObject* parent)
+	: QObject(parent), m_session(session) {
+	m_path = pathFor(session->id());
+}
+
+QString Workspace::pathFor(const QString& sessionId) {
+	const QString state =
+		QStandardPaths::writableLocation(QStandardPaths::GenericStateLocation);
+	return state + QStringLiteral("/zshell/sandboxes/") + sessionId;
+}
+
+bool Workspace::ensure() {
+	return QDir().mkpath(m_path);
+}
+
+QList<Attachment*> Workspace::importFiles(
+	const QStringList& paths, QString& error) {
+	error.clear();
+	if (!ensure()) {
+		error = QStringLiteral("Could not create the sandbox directory");
+		return {};
+	}
+
+	QMimeDatabase mimeDatabase;
+	QList<Attachment*> result;
+	for (const QString& rawPath : paths) {
+		const QFileInfo info(rawPath);
+		if (!info.exists() || !info.isFile()) {
+			qWarning() << "Workspace: skipping" << rawPath
+					   << ": file not found or not a file";
+			error = QStringLiteral("File not found: %1").arg(info.fileName());
+			continue;
+		}
+
+		const QString mimeType = mimeDatabase.mimeTypeForFile(info).name();
+		const bool isImage =
+			mimeType.startsWith(QLatin1String("image/"), Qt::CaseInsensitive);
+		const qint64 cap = isImage ? MaxImageBytes : MaxFileBytes;
+		if (info.size() > cap) {
+			qWarning() << "Workspace: skipping" << rawPath << ": too large ("
+					   << info.size() << "bytes, cap" << cap << ")";
+			error = QStringLiteral("File too large: %1").arg(info.fileName());
+			continue;
+		}
+
+		QString destination = m_path + QLatin1Char('/') + info.fileName();
+		int suffix = 1;
+		while (QFile::exists(destination)) {
+			const QString extension = info.suffix().isEmpty()
+										  ? QString()
+										  : QLatin1Char('.') + info.suffix();
+			destination = m_path + QLatin1Char('/') + info.completeBaseName() +
+						  QStringLiteral("_%1%2").arg(suffix).arg(extension);
+			++suffix;
+		}
+
+		if (!QFile::copy(info.absoluteFilePath(), destination)) {
+			qWarning() << "Workspace: skipping" << rawPath << ": copy to"
+					   << destination << "failed";
+			error =
+				QStringLiteral("Could not copy file: %1").arg(info.fileName());
+			continue;
+		}
+
+		result.append(new Attachment(
+			info.fileName(),
+			destination,
+			isImage ? Attachment::Kind::Image : Attachment::Kind::File,
+			mimeType,
+			info.size(),
+			m_session));
+	}
+	return result;
+}
+
+} // namespace ZShell::llm