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The parent constructor requires full json instead of content json now
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This tries to fix getting stuck at exit since NAM has been switched
from QThreadStorage to thread_local
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Previously moc choked on [[attributes]]; deprecated signals, slots etc.
were documented as \deprecated instead. By Qt 5.15, that was fixed.
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It's more straightforward in usage and less prone to leaks
(QThreadStorage doesn't delete objects when on non-main thread).
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Key verification events gain their own base type and
KeyVerificationSession gets a single point of entry for all kinds of
incoming events. This allows to drop a pile of `incoming*` signals in
Connection and a stack of options inside switchOnType in
processIfVerification(). KVS::handleEvent() also makes (some) allowed
state transitions a bit clearer.
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There's a bit convoluted stack of calls involved here, worth laying out.
C++ containers are loaded from JSON containers by calling fromJson<>
on each element of the JSON container, specialised by the element type
of the C++ container. If that element type is not itself an object
(e.g., QString), the respective specialisation of fromJson<> is supposed
to kick-in and override the default template that delegates the
conversion to JsonConverter (which in turn falls back to
JsonObjectConverter unless specialised for that type). Because template
functions cannot be partially specialised, that specialised overload
for, say, QString, is not complete: it accepts QJsonValue but anything
except QJsonValue will hit the generic overload instead. That makes the
whole fromJson<> machinery quite sensitive to the exact JSON type passed
to it; but as of Qt 5, the types actually presented to fromJson() were
limited to QJsonValue and QJsonDocument (okay, QJsonObject and
QJsonArray could also be there but the QJsonObject case is trivial
for JsonConverter and containers loaded from QJsonArray are all caught
with JsonArrayConverter).
Qt 6 started returning (const) QJsonValueRef from
`QJson*::const_iterator::operator*()` - meaning that whenever a simple
type (like, again, QString) is loaded within the bigger container,
the "wrong" fromJson() gets called. To fix this, JsonObjectUnpacker
gained a dedicated function to unpack QJsonValueRef. QJsonValueRef is
an old name existing since Qt 5.15 - no big pain. However, in Qt 6.4
QJsonValueConstRef is getting introduced for the same purpose. It's
possible to wrap the *Ref overloads in some #if/#else brackets but at
that point it becomes easier to just produce QJsonValue from whatever
QJson* iterators dereference to.
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Co-authored-by: Alexey Rusakov <Kitsune-Ral@users.sf.net>
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Since C++17, parentheses only work when a constructor is there, while
braces allow both calling a constructor and aggregate initialisation.
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Ironically, this slicing would not break anything as all the necessary
data are saved in the Event parent class; but the code is very fragile
and scary.
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I guess it was simply overlooked originally; in any case, currently
used compilers deal with the reference just as fine as with the pointer.
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TagEvent is only created to immediately extract content JSON from it;
at the same rate content JSON can be generated directly from content.
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Now that StateEvent name is vacated, the naming for event core classes
can be completely unified: Event, RoomEvent, CallEvent, StateEvent.
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Constrain types to derive from Event (or the chosen class), where
applicable.
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Direct construction (using makeEvent() or explicitly constructing
an event) from JSON may create an event that has a type conflicting
with that stored in JSON. There's no such problem with loadEvent(),
even though it's considerably slower. Driven by the fact that almost
nowhere in the code direct construction is used on checked JSON
(one test is the only valid case), this commit moves all JSON-loading
constructors to the protected section, thereby disabling usage of
makeEvent() in JSON-loading capacity, and switches such cases across
the library to loadEvent().
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These are small enough to comfortably reside in a single translation
unit.
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This gives a more conventional API compared to queryOr() that can be
used for event objects that have content() defined - with the downside
being that content() unpacks the entire object instead of retrieving
one particular piece (but for state events and single key-value content
it's not a problem, and those make for the vast majority of events).
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We don't expose logging internals to the outside world.
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This commit introduces a few things to further reduce the boilerplate
across event type definitions:
- Event type is no more separately stored in Event and therefore no more
passed to base event constructors. Until the previous commit, it was
used by is() to quickly match the event type; with the new event
metatype class, the same is achieved even quicker by comparing
metatype pointers.
- EventTemplate is a generalisation of StateEvent for all event types
providing common constructor signatures and content() for (most) leaf
event types. StateEvent therefore has become a partial specialisation
of EventTemplate for types derived from StateEventBase; as the known
client code base does not use it directly, a compatibility alias is
not provided. Also, DEFINE_SIMPLE_EVENT now expands into a class
deriving from EventTemplate.
- On top of StateEvent->EventTemplate specialisation,
KeyedStateEventBase and KeylessStateEventBase types are introduced
with appropriate constructor signatures (with or without state_key,
respectively) to allow `using` of them from derived event types.
To facilitate writing of constraints, concepts for keyed and keyless
state event types are also introduced; RoomStateView, e.g., makes use
of those to provide appropriate method signatures.
- typeId(), unknownEventTypeId(), UnknownEventTypeId are no more
provided - they weren't used throughout the known code base
(Quaternion, NeoChat), and the concept of "unknown event types" is
hereby eliminated entirely.
- RoomKeyEvent no more accepts senderId as a parameter; it has never
been a good practice as the sender is assigned by Connection anyway.
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The new metatype framework replaces
EventFactory/DEFINE_EVENT_TYPEID/REGISTER_EVENT_TYPE; it is faster,
more functional and extensible. Of note:
- EventMetaType mostly reproduces the logic of EventFactory but supports
custom base event types not just for loading (that part EventFactory
also supported) but also for matching - previously you had to have
Event::is*Event() for base type matching. Now Quotient::is() can
match against both base and leaf types.
- Instead of DEFINE_EVENT_TYPEID and REGISTER_EVENT_TYPE there's now
a single macro, QUO_EVENT, intended for use in the way similar to
Q_OBJECT. Actually, the entire framework borrows heavily from
QMetaObject and Q_OBJECT. Making event types full-fledged QObjects
is still not considered because half of QObject functions would not
be applicable (e.g. signals/slots) while another half (in particular,
using Matrix type ids to select event types) would still have to be
done on top of QObject. And QML can just access events as
const QJsonObjects which is arguably more lightweight as well.
- QUO_BASE_EVENT is a new macro replacing EventFactory object
definitions. This was necessary for the same reason why Q_OBJECT is
a macro: aside from a static object definition, this macro
introduces a virtual function override to resolve the metatype at
runtime. This very mechanism is used to make event type
matching/casting as quick as possible
- QUO_BASE_EVENT and QUO_EVENT use the C++20 __VA_OPT__ feature that
is only available with the new MSVC preprocessor (see
https://docs.microsoft.com/en-us/cpp/preprocessor/preprocessor-experimental-overview);
the respective switch was added to CMakeLists.txt.
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SingleKeyValue is a tiny wrapper and supposed to be discreet.
Having to explicitly (even if only with braces) construct its objects
stands in the way of readability on the consuming side of the code and
sometimes prevents direct initialisation of event objects without
constructors getting some kind of ContentParamTs parameter pack where
a single content_type argument would suffice otherwise.
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[skip ci]
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QByteArrays don't like interacting with QStrings
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- Use a dedicated structure, EmojiEntry, instead of QVariantMap
(it's Q_GADGET, should be readable from QML just fine)
- While we're at it, QVector is better than QList in Qt 5.15
- Remove language from the session state - it's used in a single method
- Modernise handleKey() code
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- Common switchOnType() piece for key verification events is factored
out into processIfVerificationEvent()
- Bare event JSON removed from KeyVerificationSession into constructors
of respective events
- Connection::sendToDevice() uses assembleEncryptedContent() introduced
in the previous commit
- commonSupportedMethods() moved out to .cpp; error/string converters
made static
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What was partially factored out before into encryptSessionKeyEvent()
is now the complete algorithm converting any event json into encrypted
content.
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- Use std::chrono for the timeout (it's more readable and
less ambiguous) and make it a local variable
- Only pass a Connection object once to constructors
- Ensure buildability even without E2EE (key verification is disabled
in that case)
- Reorder #includes
- Other cleanup following clang-tidy warnings
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# Conflicts:
# autotests/testfilecrypto.cpp
# lib/connection.cpp
# lib/connection.h
# lib/database.cpp
# lib/database.h
# lib/e2ee/qolmoutboundsession.cpp
# lib/e2ee/qolmoutboundsession.h
# lib/eventitem.h
# lib/events/encryptedevent.cpp
# lib/events/encryptedevent.h
# lib/events/encryptedfile.cpp
# lib/events/encryptedfile.h
# lib/events/keyverificationevent.cpp
# lib/events/keyverificationevent.h
# lib/events/roomkeyevent.h
# lib/room.cpp
# lib/room.h
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There's no particular reason the order of parameters in
StateEventBase::basicJson() should be as it was, and (the only)
loadStateEvent() usage in room.cpp suggests the unified order is more
convenient. Besides, this order is aligned with that in
the StateEventBase constructor.
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The template version has never worked, to the point where instantiating
it would immediately lead to FTBFS. The new version returns an event
pointer as a simpler fix that would make it usable - in particular,
there's no more need to have separate
Connection::Private::unpackAccountData(). To simplify the fix,
eventCast() has been made more tolerating - passing nullptr to it is
processed in an expected (no-op) way now.
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[skip ci]
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This is aligned with the non-moving version.
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In a situation where you have an EventPtr that you want to place
somewhere as an `event_ptr_tt<SomeMoreSpecificEventType>` you have to
carefully check that the stored event is actually of
SomeMoreSpecificType and if it is, release() that event pointer,
downcast, and re-wrap it into that new event_ptr_tt - or, as can be seen
from the diff here, re-loadEvent() from JSON, which is simpler but
inefficient. To help clients, and the library, eventCast() can now
accept an rvalue smart pointer and do all the necessary things with it.
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