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#include "timestampsupdater.h"

#include "artifact.h"
#include "artifactvisitor.h"
#include "productbuilddata.h"
#include "projectbuilddata.h"

#include <language/language.h>
#include <tools/fileinfo.h>
#include <tools/filetime.h>
#include <tools/qbsassert.h>

#include <QtCore/qfile.h>

namespace qbs {
namespace Internal {

class TimestampsUpdateVisitor : public ArtifactVisitor
{
public:
    TimestampsUpdateVisitor()
        : ArtifactVisitor(Artifact::Generated), m_now(FileTime::currentTime()) {}

    void visitProduct(const ResolvedProductConstPtr &product)
    {
        QBS_CHECK(product->buildData);
        ArtifactVisitor::visitProduct(product);

        // For target artifacts, we have to update the on-disk timestamp, because
        // the executor will look at it.
        for (Artifact * const targetArtifact : product->targetArtifacts()) {
            if (FileInfo(targetArtifact->filePath()).exists())
                (void) QFile(targetArtifact->filePath())
                    .open(QIODevice::WriteOnly | QIODevice::Append);
        }
    }

private:
    void doVisit(Artifact *artifact) override
    {
        if (FileInfo(artifact->filePath()).exists())
            artifact->setTimestamp(m_now);
    }

    FileTime m_now;
};

void TimestampsUpdater::updateTimestamps(const TopLevelProjectPtr &project,
        const QVector<ResolvedProductPtr> &products, const Logger &logger)
{
    TimestampsUpdateVisitor v;
    for (const ResolvedProductPtr &product : products)
        v.visitProduct(product);
    if (!products.empty())
        project->buildData->setDirty();
    project->store(logger);
}

} // namespace Internal
} // namespace qbs
