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// SPDX-FileCopyrightText: 2020 Kitsune Ral <kitsune-ral@users.sf.net>
// SPDX-License-Identifier: LGPL-2.1-or-later
#include "uri.h"
#include "logging_categories_p.h"
#include "util.h"
#include <QtCore/QRegularExpression>
using namespace Quotient;
namespace {
struct ReplacePair { QLatin1String uriString; char sigil; };
/// \brief Defines bi-directional mapping of path prefixes and sigils
///
/// When there are two prefixes for the same sigil, the first matching
/// entry for a given sigil is used.
constexpr auto replacePairs = std::to_array<ReplacePair>({ { "u/"_L1, '@' },
{ "user/"_L1, '@' },
{ "roomid/"_L1, '!' },
{ "r/"_L1, '#' },
{ "room/"_L1, '#' },
// This is here to support bare (without
// roomid) event ids proposed in MSC2644
{ "e/"_L1, '$' },
{ "event/"_L1, '$' } });
inline auto encodedPath(const QUrl& url)
{
return url.path(QUrl::EncodeDelimiters | QUrl::EncodeUnicode);
}
QString pathSegment(const QUrl& url, int which)
{
return QUrl::fromPercentEncoding(
encodedPath(url).section(u'/', which, which).toUtf8());
}
auto decodeFragmentPart(QStringView part)
{
return QUrl::fromPercentEncoding(part.toLatin1()).toUtf8();
}
}
Uri::Uri(QByteArray primaryId, QByteArray secondaryId, QString query)
{
if (primaryId.isEmpty())
primaryType_ = Empty;
else {
setScheme("matrix"_L1);
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 + QString::fromUtf8(safePrimaryId);
break;
}
if (!secondaryId.isEmpty()) {
if (secondaryId.size() < 2) {
primaryType_ = Invalid;
return;
}
auto safeSecondaryId = secondaryId.mid(1);
safeSecondaryId.replace('/', "%2F");
pathToBe += "/event/"_L1 + QString::fromUtf8(safeSecondaryId);
}
setPath(pathToBe, QUrl::TolerantMode);
}
if (!query.isEmpty())
setQuery(query);
}
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"_L1) {
// Check sanity according to MSC2312
const auto& urlPath = encodedPath(*this);
const auto& splitPath = urlPath.split(u'/');
switch (splitPath.size()) {
case 2:
break;
case 4:
if (splitPath[2] == "event"_L1 || splitPath[2] == "e"_L1)
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"_L1 && authority() == "matrix.to"_L1) {
static const QRegularExpression MatrixToUrlRE(
"^/(?<main>[^:]+(:|%3A|%3a)[^/?]+)(/(?<sec>(\\$|%24)[^?]+))?(\\?(?<query>.+))?$"_L1);
static const auto _ [[maybe_unused]] = QUO_CHECK(MatrixToUrlRE.isValid());
// matrix.to accepts both literal sigils (as well as & and ? used in
// its "query" substitute) and their %-encoded forms;
// so force QUrl to decode everything.
auto f = fragment(QUrl::EncodeUnicode);
if (auto&& m = MatrixToUrlRE.match(f); m.hasMatch())
*this = Uri { decodeFragmentPart(m.capturedView(u"main")),
decodeFragmentPart(m.capturedView(u"sec")),
QString::fromUtf8(decodeFragmentPart(m.capturedView(u"query"))) };
}
}
Uri::Uri(const QString& uriOrId) : Uri(fromUserInput(uriOrId)) {}
Uri Uri::fromUserInput(const QString& uriOrId)
{
if (uriOrId.isEmpty())
return {}; // type() == None
// A quick check if uriOrId is a plain Matrix id
// Bare event ids cannot be resolved without a room scope as per the current
// spec but there's a movement towards making them navigable (see, e.g.,
// https://github.com/matrix-org/matrix-doc/pull/2644) - so treat them
// as valid
if ("!@#+$"_L1.contains(uriOrId[0]))
return Uri { uriOrId.toUtf8() };
return Uri { QUrl::fromUserInput(uriOrId) };
}
Uri::Type Uri::type() const { return primaryType_; }
Uri::SecondaryType Uri::secondaryType() const
{
const auto& type2 = pathSegment(*this, 2);
return type2 == "event"_L1 || type2 == "e"_L1 ? EventId : NoSecondaryId;
}
QUrl Uri::toUrl(UriForm form) const
{
if (!isValid())
return {};
if (form == CanonicalUri || type() == NonMatrix)
return SLICE(*this, QUrl);
QUrl url;
url.setScheme("https"_L1);
url.setHost("matrix.to"_L1);
url.setPath("/"_L1);
auto fragment = u'/' + primaryId();
if (const auto& secId = secondaryId(); !secId.isEmpty())
fragment += u'/' + secId;
if (const auto& q = query(); !q.isEmpty())
fragment += u'?' + q;
url.setFragment(fragment);
return url;
}
QString Uri::primaryId() const
{
if (primaryType_ == Empty || primaryType_ == Invalid)
return {};
auto idStem = pathSegment(*this, 1);
if (!idStem.isEmpty())
idStem.push_front(QChar::fromLatin1(primaryType_));
return idStem;
}
QString Uri::secondaryId() const
{
auto idStem = pathSegment(*this, 3);
if (!idStem.isEmpty())
idStem.push_front(QChar::fromLatin1(secondaryType()));
return idStem;
}
namespace {
inline constexpr auto ActionKey = "action"_L1;
}
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(u"via"_s, QUrl::EncodeReserved);
}
bool Uri::isValid() const
{
return primaryType_ != Empty && primaryType_ != Invalid;
}
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