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#pragma once
#include <QSet>
#include <QUrl>
#include <QWebEngineUrlRequestInterceptor>
/// Deny-by-default request policy for the message view.
///
/// A message body is untrusted input from a stranger. Everything is blocked
/// unless explicitly permitted: remote loads leak the fact that a message was
/// read (tracking pixels) and file: loads would expose the local filesystem.
class RequestInterceptor : public QWebEngineUrlRequestInterceptor
{
Q_OBJECT
public:
explicit RequestInterceptor(QObject *parent = nullptr);
/// The whole policy, as a pure function so it can be tested directly.
bool shouldAllow(const QUrl &url);
void interceptRequest(QWebEngineUrlRequestInfo &info) override;
/// Content-IDs belonging to the currently displayed message.
void setAllowedCids(const QSet<QString> &cids) { m_allowedCids = cids; }
/// Per-message opt-in, triggered by the user clicking "Load remote content".
/// Never persisted, never carried to the next message.
void setAllowRemote(bool allow) { m_allowRemote = allow; }
bool allowRemote() const { return m_allowRemote; }
/// True once any request has been denied, so the UI can offer the button.
bool blockedAnything() const { return m_blockedAnything; }
/// Called before rendering a new message: clears both the remote grant and
/// the blocked flag.
void resetForNewMessage();
private:
QSet<QString> m_allowedCids;
bool m_allowRemote = false;
bool m_blockedAnything = false;
};
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