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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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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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Constrain types to derive from Event (or the chosen class), where
applicable.
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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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- 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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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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Although Qt 5 didn't complain about that, you could never really use
sendToDevices() in its slot (or even invocable) capacity because
Qt's meta-type system could not handle move-only UsersToDevicesToEvents.
Qt 6 is more stringent; the build fails at trying to instantiate
QMetaType for that type (with a rather unhelpful error message thrown
by Clang, and more helpful but very verbose diagnostic from MSVC)
because it does not provide a copy constructor.
However, sendToDevice doesn't really need to have full-blown events
in that parameter; just the content of the event is equally fine.
This commit does exactly that: replaces UsersToDevicesToEvents with
UsersToDevicesToContent that contains QJsonObject's instead of
EventPtr's. The code around is updated accordingly.
Also: factor out the key event JSON creation from
makeMessageEventForSessionKey() because it's the same JSON for each
target device; the function therefore is called encryptSessionKeyEvent()
now.
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Functions (Room::Private::)createOlmSession, payloadForUserDevice
and sendRoomKeyToDevices don't have a lot to do with the given Room
object but deal with quite a few things stored in Connection. This
commit moves them to Connection::Private, exposing
sendSessionKeyToDevices (the new name for sendRoomKeyToDevices) in
Connection so that Room could call it from Room::P::sendMegolmSession().
While moving these over, a few additional things were adjusted:
- more functions marked as const
- a few functions could be moved now from Connection
to Connection::Private
- false slots in Connection (such as picklingMode) are moved out of
the slots block
- keys.yml in Matrix CS API definitions has been adjusted to match
the real structure of `/claim` response (see quotient-im/matrix-spec
repo); csapi/keys.h has been regenerated accordingly.
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Notably, replace a multi-level hash map with QMultiHash and factor out
Room::P::createOlmSession().
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Besides having a misleading name (and it goes back to the spec),
EncryptedFile under `file` key preempts the `url` (or `thumbnail_url`)
string value so only one of the two should exist. This is a case for
using std::variant<> - despite its clumsy syntax, it can actually
simplify and streamline code when all the necessary bits are in place
(such as conversion to JSON and getting the common piece - the URL -
out of it). This commit replaces `FileInfo::url` and `FileInfo::file`
with a common field `source` of type `FileSourceInfo` that is an alias
for a variant type covering both underlying types; and `url()` is
reintroduced as a function instead, to allow simplified access
to whichever URL is available inside the variant.
Oh, and EncryptedFile is EncryptedFileMetadata now, to clarify that it
does not represent the file payload itself but rather the data necessary
to obtain that payload.
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Co-authored-by: Alexey Rusakov <Kitsune-Ral@users.sf.net>
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Mainly driven by clang-tidy and SonarCloud warnings (sadly, SonarCloud
doesn't store historical reports so no link can be provided here).
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The result is FTBFS as yet; next commits will fix that, along with a few
other things.
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Improvements:
- Quotient::lift() - a way to invoke a function on an optional (including
Omittable) or a pointer if it's 'truthy'. Doesn't need enhanced
function_traits<>, only the standard library; works on any number
of arguments that can be dereferenced and casted to bool.
- then() - the version of lift() as a member function.
- edit() was renamed to ensure() (edit() might become a read-write
counterpart of then() at some point). It's not really used across
libQuotient codebase (or elsewhere) but is staying there just in case.
It can also accept an initializer, removing the requirement of
default-constructibility.
- Quotient::merge() is simplified, with one universal implementation
covering both Omittable/optional and plain values.
- All that now lives in its dedicated pair of files, further
decluttering util.h
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Although parented to Connection, SsoSession was pretty leaky in that
unsuccessful login attempts didn't delete the object and in some errors
didn't even close the local HTTP socket (though new connections would no
more be accepted). Also, without the documentation it wasn't clear who
owns the object returned by Connection::prepareForSso(). Now it is.
Unfortunately, it's not easy to cover SsoSession with tests. Basically,
it takes a homeserver and a mock "SSO agent" that would check
the SSO URL for validity and then both send the login authorisation
to the homeserver as well as ping the callback given by SsoSession.
Maybe for another time.
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The original (more complex and comprehensive) solution belongs to
https://oliora.github.io/2015/12/29/pimpl-and-rule-of-zero.html - this
commit only provides a small wrapper for non-copyable Private class
implementations common throughout libQuotient. Unlike the original,
default initialisation is made explicit - you have to pass
ZeroImpl<Private>() instead (and I firmly believe it's a good thing:
normally pointers to Private should not remain nullptr). The reason
ZeroImpl<> is not a template variable is quite simple: unique_ptr is
non-copyable and so cannot be initialised from; while a template
function will initialise the value in-place thanks to copy elision.
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This include all (hopefully) classes/structures and functions that have
non-inline definitions, as well as namespaces with Q_NAMESPACE since
those have non-inline (as of Qt 5.15) QMetaObject - for that a new
macro, QUO_NAMESPACE, has been devised to accommodate the lack of
Q_NAMESPACE_EXPORT in Qt before 5.14.
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Because that's what it really is.
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There's no need to return lambdas where pointers to specialised function
templates would work just fine.
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