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This introduces enumTo/FromJsonString() and flagTo/FromJsonString(),
four facility functions to simplify conversion between C++ enums and
JSON, and refactors a couple of places where it's useful.
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fromJson() is generalised to accept any JSON-like type while passing
QJsonObject to JsonConverter<>::load (instead of doLoad). This allows to
(still) rely on JsonConverter<> as a customisation point while providing
an opportunity to overload fromJson for custom types in a pointed way
(specifically, by providing the overload for
`fromJson(const QJsonObject&)`), instead of having to go with full-blown
JsonConverter<> specialisation. This will be used in a further commit
to simplify ReceiptEvent definition.
Using if constexpr in combination with constraints (`requires()`) -
the first such case in Quotient codebase - allowed to put the entire
logic in a single JsonConverter<>::load() body instead of having a
facility JsonExporter<> class for SFINAE.
Aside from that, fromJson<QJsonValue, QJsonValue> is entirely dropped
because it's not supposed to be used that way (it's no-op after all);
reflecting that, Event::unsignedPart() and Event::contentPart() no more
default to QJsonValue as the expected return type, you have to
explicitly provide the type instead (and as one can see from the changes
in the commit, it's actually better that way since it's better
to validate the value inside JSON - e.g. check QString or QJsonObject
for emptiness - than the QJsonValue envelope which may still wrap
an empty value).
toJson() is also generalised, replacing 3 functions with one that has
a constexpr if to discern between two kinds of types.
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This is mainly to plug the definition of a string-to-variant map
for one-time keys (see
https://spec.matrix.org/v1.2/client-server-api/#key-algorithms) into
the CS API generated code (see the "shortcut OneTimeKeys" commit for
gtad.yaml); but along with it came considerable streamlining of code
in qolmaccount.cpp. Using std::variant to store that map also warranted
converters.h to gain support for that type (even wider than toJson()
that is already in dev - a non-trivial merge from dev is in order).
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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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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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This is a rework of EventContent::SimpleContent previously defined in
simplestateevents.h. Quite a few events (and not only state events) have
just a single key-value pair in their content - this structure (which
is really just a template wrapper around the value) and the accompanying
JsonConverter<> specialisation encapsulate the concept to streamline
definition of such events. This commit only has simplestateevents.h
using it; further commits will use SingleKeyValue in other places.
toSnakeCase is a facility function that converts camelCase used for
C++ variables into snake_case used in JSON payloads. Combined with
the preprocessor trick that makes a string literal from an identifier,
this allows to reduce boilerplate code that repeats the same name for
fields in C++ event classes and fields in JSON. SingleKeyValue uses it,
and there are other cases for it coming.
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Previously you could not use toJson() on a polymorphic structure such
as one of those defined in eventcontent.h because it is not assignable
and the default specialisation of JsonObjectConverter used assignment.
To avoid that limitation, one had to specialise JsonObjectConverter for
each descendant of EventContent::Base, which is a lot of boilerplate.
The new JsonConverter (the template underpinning the "default"
to/fromJson implementation) improves on two things:
1. dump() allows to construct your own QJsonObject - or anything else
convertable to QJsonValue - instead of requiring to fill in the
pre-constructed one.
2. load() allows to construct your value type directly from QJsonObject
instead of default-constructing it in advance.
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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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When internal linkage is necessary, anonymous namespaces fulfil the same
purpose in a better way. See also:
https://stackoverflow.com/questions/4422507/superiority-of-unnamed-namespace-over-static
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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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There was a lot of excess redirection in fromJson() and toJson() with
most of JsonConverter<> specialisations being unnecessary boilerplate.
These have been replaced by overloads for toJson() and explicit
specialisations for fromJson() wherever possible without breaking
the conversion logic.
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It's might look weird; but without making fromJson() a specialisation
it becomes an overload next to an implicit specialisation of
the template function defined just above, and then loses to that
specialisation because it (also) has the perfect match.
(would be great if the compiler shaded the implicit specialisation in
such cases - alas it's not how the standard works.)
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Makes the Room::P::toJson() code more readable.
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QUrl can now be converted even with QT_NO_URL_CAST_FROM_STRING; and it
can also be put to queries. QByteArray did not really need conversion
in JSON context; and QJsonObject is/was never used in queries.
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After going through all the files and the history of commits on them
it was clear that some copyright statements are obsolete (the code has
been overwritten since) and some are missing. This commit tries best to
remedy that, along with adding SPDX tags where they were still not used.
Also, a minimal SPDX convention is documented for further contributions.
Closes #426.
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That breaks API all over the place but:
1. The fixes are trivial.
2. More of std:: is used instead of home-baking the same stuff.
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Invading into std:: is frowned upon, even though legitimate from the C++ standard perspective. Given that it's possible to pass a hash object to unordered_map, it only takes an alias for std::unordered_map to avoid having to specialize std::hash. And besides, a generic compatibility bridge between qHash and std::hash has been long needed.
std::hash<QString> in converters.h remains for now; it will be dropped separately when the API files get regenerated to use UnorderedMap.
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general improvements
Single-argument fromJson<Omittable<T>>() now works as well.
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[skip ci]
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# Conflicts:
# CMakeLists.txt
# lib/avatar.cpp
# lib/connection.cpp
# lib/connection.h
# lib/connectiondata.cpp
# lib/csapi/account-data.cpp
# lib/csapi/account-data.h
# lib/csapi/capabilities.cpp
# lib/csapi/capabilities.h
# lib/csapi/content-repo.cpp
# lib/csapi/create_room.cpp
# lib/csapi/filter.cpp
# lib/csapi/joining.cpp
# lib/csapi/keys.cpp
# lib/csapi/list_joined_rooms.cpp
# lib/csapi/notifications.cpp
# lib/csapi/openid.cpp
# lib/csapi/presence.cpp
# lib/csapi/pushrules.cpp
# lib/csapi/registration.cpp
# lib/csapi/room_upgrades.cpp
# lib/csapi/room_upgrades.h
# lib/csapi/search.cpp
# lib/csapi/users.cpp
# lib/csapi/versions.cpp
# lib/csapi/whoami.cpp
# lib/csapi/{{base}}.cpp.mustache
# lib/events/accountdataevents.h
# lib/events/eventcontent.h
# lib/events/roommemberevent.cpp
# lib/events/stateevent.cpp
# lib/jobs/basejob.cpp
# lib/jobs/basejob.h
# lib/networkaccessmanager.cpp
# lib/networksettings.cpp
# lib/room.cpp
# lib/room.h
# lib/settings.cpp
# lib/settings.h
# lib/syncdata.cpp
# lib/user.cpp
# lib/user.h
# lib/util.cpp
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Both now use through a common JsonConverter<> template class with its
base definition tuned for structs/QJsonObjects and specialisations for
non-object types. This new implementation doesn't work with virtual
fillJson functions yet (so EventContent classes still use toJson as a
member function) and does not cope quite well with non-constructible
objects (you have to specialise JsonConverter<> rather than, more
intuitively, JsonObjectConverter<>), but overall is more streamlined
compared to the previous implementation. It also fixes one important
issue that pushed for a rewrite: the previous implementation was not
working with structure hierarchies at all so (in particular) the Filter
part of CS API was totally disfunctional.
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- registerEventType(): comment the cryptic _ variable
- Room::postEvent: document the return value
- Room::Private: upgrade comments to doc-comments - even though in Private, they still are helpful to show hints in IDEs.
- General cleanup
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This commit consists of two parts: upgrading the API infrastructure and trivial but sweeping update to the generated files.
1. The API infrastructure (converters.h, *.mustache and some other non-generated files) now can deal with top-level JSON arrays and response inlining; better supports property maps; and gets some formatting fixes in generated code.
2. Generated files now use QJsonValue instead of QJsonObject as a default type
to (un)marshall Matrix API data structures, to match the change in the infrastructure above
This commit is still using the old Matrix API definitions, before CS API 0.4.0. Getting to CS API 0.4.0 will come next.
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The Spec wasn't entirely consistent on this until recently but floats actually are used in the wild, rather than strings.
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Most of the actual change was in the API definition files (thanks to @anoadragon453), plus a converter from a QJsonObject map to the URL query string.
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There were two common points that had to be updated every time a new event is introduced:
the EventType enumeration and one of 3 doMakeEvent<> specialisations. The new code
has a template class, EventFactory<>, that uses a list of static factory methods
to create events instead of typelists used in doMakeEvent<>(); the EventType enumeration
is replaced with a namespace populated with constants as necessary.
In general, EventType is considered a deprecated mechanism altogether; instead, a set
of facilities is provided: is<>() to check if an event has a certain type (to replace
comparison against an EventType value) and visit<>() to execute actions based on
the event type (replacing switch statements over EventType values).
Closes #129.
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Also: toJson<optional> is no more (was #if 0'd anyway).
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Some folks are still on Ubuntu vivid :(
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