url_parser.h

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#ifndef COCKATRICE_URL_PARSER_H
#define COCKATRICE_URL_PARSER_H
 
#include <QList>
#include <QMetaObject>
#include <QObject>
#include <QString>
#include <QUrlQuery>
#include <qtmetamacros.h>
 
class Intent;
class MainWindow;
struct ContextJoinGame;

struct PendingIntentChain
{
    QList<Intent *> intents;
 
    // Snapshot of the session in place when this chain started running, so a
    // queued chain follows whichever server the chain before it settled on.
    QString previousServerHost;
    QString previousServerPort;
 
    // Recorded at parse time when the user confirmed migrating away from a live
    // session to the host/port named by the link.
    QString migrationTargetHost;
    QString migrationTargetPort;
    bool pendingRestore = false;
};

class IntentUrlParser : public QObject
{
    Q_OBJECT
 
public:
    IntentUrlParser(QObject *parent, MainWindow *mainWindow);
    void handle(const QString &urlStr);
 
signals:
    void urlChainFinished(bool connected);
 
private:
    Intent *createJoinGameIntent(const QUrlQuery &query, PendingIntentChain &chain);
    Intent *createOpenDeckIntent(const QUrlQuery &query, PendingIntentChain &chain);
    QString generateJoinGameMessage(const ContextJoinGame &context, const QString &gameDescription);
    [[nodiscard]] bool isConnectedTo(const QString &hostname, const QString &port) const;
    void startNextChain();
    void chainEnded(bool chainSucceeded);
    void onChainIntentDestroyed();
    void restorePreviousServer(const PendingIntentChain &chain);
    void restoreToPreviousServer(const PendingIntentChain &chain);
 
    MainWindow *mainWindow;
    QList<PendingIntentChain> pendingChains;
    bool chainRunning = false;
    // Disconnects the destroyed-signal backstop once a chain ends, so an old
    // intent's deferred deletion cannot end the chain that runs after it.
    QMetaObject::Connection chainBackstopConnection;
};
 
#endif // COCKATRICE_URL_PARSER_H