test: add snapshot tests for MessageBuilder (#5598)

src/util/IrcHelpers.cpp

@@ -0,0 +1,72 @@
+#include "util/IrcHelpers.hpp"
+
+#include "Application.hpp"
+
+namespace {
+
+using namespace chatterino;
+
+QDateTime calculateMessageTimeBase(const Communi::IrcMessage *message)
+{
+    // Check if message is from recent-messages API
+    if (message->tags().contains("historical"))
+    {
+        bool customReceived = false;
+        auto ts =
+            message->tags().value("rm-received-ts").toLongLong(&customReceived);
+        if (!customReceived)
+        {
+            ts = message->tags().value("tmi-sent-ts").toLongLong();
+        }
+
+        return QDateTime::fromMSecsSinceEpoch(ts);
+    }
+
+    // If present, handle tmi-sent-ts tag and use it as timestamp
+    if (message->tags().contains("tmi-sent-ts"))
+    {
+        auto ts = message->tags().value("tmi-sent-ts").toLongLong();
+        return QDateTime::fromMSecsSinceEpoch(ts);
+    }
+
+    // Some IRC Servers might have server-time tag containing UTC date in ISO format, use it as timestamp
+    // See: https://ircv3.net/irc/#server-time
+    if (message->tags().contains("time"))
+    {
+        QString timedate = message->tags().value("time").toString();
+
+        auto date = QDateTime::fromString(timedate, Qt::ISODate);
+        date.setTimeZone(QTimeZone::utc());
+        return date.toLocalTime();
+    }
+
+    // Fallback to current time
+#ifdef CHATTERINO_WITH_TESTS
+    if (getApp()->isTest())
+    {
+        return QDateTime::fromMSecsSinceEpoch(0, QTimeZone::utc());
+    }
+#endif
+
+    return QDateTime::currentDateTime();
+}
+
+}  // namespace
+
+namespace chatterino {
+
+QDateTime calculateMessageTime(const Communi::IrcMessage *message)
+{
+    auto dt = calculateMessageTimeBase(message);
+
+#ifdef CHATTERINO_WITH_TESTS
+    if (getApp()->isTest())
+    {
+        return dt.toUTC();
+    }
+#endif
+
+    return dt;
+}
+
+}  // namespace chatterino