Refactor toJson/fillJson

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.

1 files changed, 8 insertions, 15 deletions

diff --git a/lib/csapi/definitions/push_condition.cpp b/lib/csapi/definitions/push_condition.cpp
index 045094bc..ace02755 100644
--- a/lib/csapi/definitions/push_condition.cpp
+++ b/lib/csapi/definitions/push_condition.cpp
@@ -6,28 +6,21 @@
 
 using namespace QMatrixClient;
 
-QJsonObject QMatrixClient::toJson(const PushCondition& pod)
+void JsonObjectConverter<PushCondition>::dumpTo(
+        QJsonObject& jo, const PushCondition& pod)
 {
-    QJsonObject jo;
     addParam<>(jo, QStringLiteral("kind"), pod.kind);
     addParam<IfNotEmpty>(jo, QStringLiteral("key"), pod.key);
     addParam<IfNotEmpty>(jo, QStringLiteral("pattern"), pod.pattern);
     addParam<IfNotEmpty>(jo, QStringLiteral("is"), pod.is);
-    return jo;
 }
 
-PushCondition FromJsonObject<PushCondition>::operator()(const QJsonObject& jo) const
+void JsonObjectConverter<PushCondition>::fillFrom(
+    const QJsonObject& jo, PushCondition& result)
 {
-    PushCondition result;
-    result.kind =
-        fromJson<QString>(jo.value("kind"_ls));
-    result.key =
-        fromJson<QString>(jo.value("key"_ls));
-    result.pattern =
-        fromJson<QString>(jo.value("pattern"_ls));
-    result.is =
-        fromJson<QString>(jo.value("is"_ls));
-
-    return result;
+    fromJson(jo.value("kind"_ls), result.kind);
+    fromJson(jo.value("key"_ls), result.key);
+    fromJson(jo.value("pattern"_ls), result.pattern);
+    fromJson(jo.value("is"_ls), result.is);
 }