Make link regular expression only be created once

src/common/LinkParser.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <QRegularExpressionMatch>
+#include <QString>
+
+namespace chatterino {
+
+class LinkParser
+{
+public:
+    explicit LinkParser(const QString &unparsedString);
+
+    bool hasMatch() const
+    {
+        return this->match_.hasMatch();
+    }
+
+    QString getCaptured() const
+    {
+        return this->match_.captured();
+    }
+
+private:
+    QRegularExpressionMatch match_;
+};
+
+}  // namespace chatterino