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#include "uri.h"
#include "logging.h"
#include <QtCore/QRegularExpression>
using namespace Quotient;
struct ReplacePair { QByteArray uriString; char sigil; };
/// Defines bi-directional mapping of path prefixes and sigils
static const auto replacePairs = {
ReplacePair { "user/", '@' },
{ "roomid/", '!' },
{ "room/", '#' },
// The notation for bare event ids is not proposed in MSC2312 but there's
// https://github.com/matrix-org/matrix-doc/pull/2644
{ "event/", '$' }
};
Uri::Uri(QByteArray primaryId, QByteArray secondaryId, QString query)
{
if (primaryId.isEmpty())
primaryType_ = Empty;
else {
setScheme("matrix");
QString pathToBe;
primaryType_ = Invalid;
if (primaryId.size() < 2) // There should be something after sigil
return;
for (const auto& p: replacePairs)
if (primaryId[0] == p.sigil) {
primaryType_ = Type(p.sigil);
auto safePrimaryId = primaryId.mid(1);
safePrimaryId.replace('/', "%2F");
pathToBe = p.uriString + std::move(safePrimaryId);
break;
}
if (!secondaryId.isEmpty()) {
if (secondaryId.size() < 2) {
primaryType_ = Invalid;
return;
}
auto safeSecondaryId = secondaryId.mid(1);
safeSecondaryId.replace('/', "%2F");
pathToBe += "/event/" + std::move(safeSecondaryId);
}
setPath(pathToBe, QUrl::TolerantMode);
}
if (!query.isEmpty())
setQuery(std::move(query));
}
static inline auto encodedPath(const QUrl& url)
{
return url.path(QUrl::EncodeDelimiters | QUrl::EncodeUnicode);
}
static QString pathSegment(const QUrl& url, int which)
{
return QUrl::fromPercentEncoding(
encodedPath(url).section('/', which, which).toUtf8());
}
static auto decodeFragmentPart(const QStringRef& part)
{
return QUrl::fromPercentEncoding(part.toLatin1()).toUtf8();
}
static auto matrixToUrlRegexInit()
{
// See https://matrix.org/docs/spec/appendices#matrix-to-navigation
const QRegularExpression MatrixToUrlRE {
"^/(?<main>[^:]+:[^/?]+)(/(?<sec>(\\$|%24)[^?]+))?(\\?(?<query>.+))?$"
};
Q_ASSERT(MatrixToUrlRE.isValid());
return MatrixToUrlRE;
}
Uri::Uri(QUrl url) : QUrl(std::move(url))
{
// NB: don't try to use `url` from here on, it's moved-from and empty
if (isEmpty())
return; // primaryType_ == Empty
primaryType_ = Invalid;
if (!QUrl::isValid()) // MatrixUri::isValid() checks primaryType_
return;
if (scheme() == "matrix") {
// Check sanity as per https://github.com/matrix-org/matrix-doc/pull/2312
const auto& urlPath = encodedPath(*this);
const auto& splitPath = urlPath.splitRef('/');
switch (splitPath.size()) {
case 2:
break;
case 4:
if (splitPath[2] == "event")
break;
[[fallthrough]];
default:
return; // Invalid
}
for (const auto& p: replacePairs)
if (urlPath.startsWith(p.uriString)) {
primaryType_ = Type(p.sigil);
return; // The only valid return path for matrix: URIs
}
qCDebug(MAIN) << "The matrix: URI is not recognised:"
<< toDisplayString();
return;
}
primaryType_ = NonMatrix; // Default, unless overridden by the code below
if (scheme() == "https" && authority() == "matrix.to") {
static const auto MatrixToUrlRE = matrixToUrlRegexInit();
// matrix.to accepts both literal sigils (as well as & and ? used in
// its "query" substitute) and their %-encoded forms;
// so force QUrl to decode everything.
auto f = fragment(QUrl::EncodeUnicode);
if (auto&& m = MatrixToUrlRE.match(f); m.hasMatch())
*this = Uri { decodeFragmentPart(m.capturedRef("main")),
decodeFragmentPart(m.capturedRef("sec")),
decodeFragmentPart(m.capturedRef("query")) };
}
}
Uri::Uri(const QString& uriOrId) : Uri(fromUserInput(uriOrId)) {}
Uri Uri::fromUserInput(const QString& uriOrId)
{
if (uriOrId.isEmpty())
return {}; // type() == None
// A quick check if uriOrId is a plain Matrix id
// Bare event ids cannot be resolved without a room scope as per the current
// spec but there's a movement towards making them navigable (see, e.g.,
// https://github.com/matrix-org/matrix-doc/pull/2644) - so treat them
// as valid
if (QStringLiteral("!@#+$").contains(uriOrId[0]))
return Uri { uriOrId.toUtf8() };
return Uri { QUrl::fromUserInput(uriOrId) };
}
Uri::Type Uri::type() const { return primaryType_; }
Uri::SecondaryType Uri::secondaryType() const
{
return pathSegment(*this, 2) == "event" ? EventId : NoSecondaryId;
}
QUrl Uri::toUrl(UriForm form) const
{
if (!isValid())
return {};
if (form == CanonicalUri || type() == NonMatrix)
return *this;
QUrl url;
url.setScheme("https");
url.setHost("matrix.to");
url.setPath("/");
auto fragment = '/' + primaryId();
if (const auto& secId = secondaryId(); !secId.isEmpty())
fragment += '/' + secId;
if (const auto& q = query(); !q.isEmpty())
fragment += '?' + q;
url.setFragment(fragment);
return url;
}
QString Uri::primaryId() const
{
if (primaryType_ == Empty || primaryType_ == Invalid)
return {};
const auto& idStem = pathSegment(*this, 1);
return idStem.isEmpty() ? idStem : primaryType_ + idStem;
}
QString Uri::secondaryId() const
{
const auto& idStem = pathSegment(*this, 3);
return idStem.isEmpty() ? idStem : secondaryType() + idStem;
}
static const auto ActionKey = QStringLiteral("action");
QString Uri::action() const
{
return type() == NonMatrix || !isValid()
? QString()
: QUrlQuery { query() }.queryItemValue(ActionKey);
}
void Uri::setAction(const QString& newAction)
{
if (!isValid()) {
qCWarning(MAIN) << "Cannot set an action on an invalid Quotient::Uri";
return;
}
QUrlQuery q { query() };
q.removeQueryItem(ActionKey);
q.addQueryItem(ActionKey, newAction);
setQuery(q);
}
QStringList Uri::viaServers() const
{
return QUrlQuery { query() }.allQueryItemValues(QStringLiteral("via"),
QUrl::EncodeReserved);
}
bool Uri::isValid() const
{
return primaryType_ != Empty && primaryType_ != Invalid;
}
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