Move NeoChatConnection and NeoChatRoom to LibNeoChat

Move `NeoChatConnection` and `NeoChatRoom` to `LibNeoChat` along with any required dependencies.

src/libneochat/utils.cpp

@@ -0,0 +1,80 @@
+// SPDX-FileCopyrightText: 2024 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: LGPL-2.0-or-later
+
+#include "utils.h"
+
+#ifdef HAVE_ICU
+#include <QTextBoundaryFinder>
+#include <QTextCharFormat>
+#include <unicode/uchar.h>
+#include <unicode/urename.h>
+#endif
+
+#include <Quotient/connection.h>
+
+#include <QJsonDocument>
+#include <QQuickWindow>
+
+using namespace Quotient;
+
+bool QmlUtils::isEmoji(const QString &text)
+{
+    return Utils::isEmoji(text);
+}
+bool QmlUtils::isValidJson(const QByteArray &json)
+{
+    return !QJsonDocument::fromJson(json).isNull();
+}
+
+QString QmlUtils::escapeString(const QString &string)
+{
+    return string.toHtmlEscaped();
+}
+
+QColor QmlUtils::getUserColor(qreal hueF)
+{
+    const auto lightness = static_cast<QGuiApplication *>(QGuiApplication::instance())->palette().color(QPalette::Active, QPalette::Window).lightnessF();
+    // https://github.com/quotient-im/libQuotient/wiki/User-color-coding-standard-draft-proposal
+    return QColor::fromHslF(hueF, 1, -0.7 * lightness + 0.9, 1);
+}
+
+QQuickItem *QmlUtils::focusedWindowItem()
+{
+    const auto window = qobject_cast<QQuickWindow *>(QGuiApplication::focusWindow());
+    if (window) {
+        return window->contentItem();
+    } else {
+        return nullptr;
+    }
+}
+
+QString QmlUtils::nameForPowerLevelValue(const int value)
+{
+    return PowerLevel::nameForLevel(PowerLevel::levelForValue(value));
+}
+
+bool Utils::isEmoji(const QString &text)
+{
+#ifdef HAVE_ICU
+    QTextBoundaryFinder finder(QTextBoundaryFinder::Grapheme, text);
+    int from = 0;
+    while (finder.toNextBoundary() != -1) {
+        auto to = finder.position();
+        if (text[from].isSpace()) {
+            from = to;
+            continue;
+        }
+
+        auto first = text.mid(from, to - from).toUcs4()[0];
+        if (!u_hasBinaryProperty(first, UCHAR_EMOJI_PRESENTATION)) {
+            return false;
+        }
+        from = to;
+    }
+    return true;
+#else
+    return false;
+#endif
+}
+
+#include "moc_utils.cpp"