Moved all the bobbycar gui code into this library

src/textinterface.h

@@ -0,0 +1,77 @@
+#pragma once
+
+// system includes
+#include <string>
+
+// 3rdparty lib includes
+#include <fmt/core.h>
+
+namespace espgui {
+class TextInterface {
+public:
+    virtual std::string text() const = 0;
+};
+
+class EmptyText : public virtual TextInterface
+{
+public:
+    std::string text() const override { return {}; }
+};
+
+template<const char *Ttext>
+class StaticText : public virtual TextInterface
+{
+public:
+    static constexpr const char *STATIC_TEXT = Ttext;
+
+    std::string text() const override { return Ttext; }
+};
+
+class ChangeableText : public virtual TextInterface
+{
+public:
+    std::string text() const override { return m_title; }
+    void setTitle(std::string &&title) { m_title = std::move(title); }
+    void setTitle(const std::string &title) { m_title = title; }
+
+private:
+    std::string m_title;
+};
+
+template<typename T>
+class CachedText : public virtual T
+{
+public:
+    std::string text() const override
+    {
+        if (!m_loaded)
+        {
+            m_text = T::text();
+            m_loaded = true;
+        }
+
+        return m_text;
+    }
+
+private:
+    mutable bool m_loaded{};
+    mutable std::string m_text;
+};
+
+template<typename T>
+class StaticallyCachedText : public virtual T
+{
+public:
+    std::string text() const override
+    {
+        static const auto text = T::text();
+        return text;
+    }
+};
+
+template<const char *Tprefix, typename Taccessor>
+struct TextWithValueHelper : public virtual TextInterface
+{
+    std::string text() const override { return fmt::format("{} {}", Tprefix, Taccessor{}.getValue()); }
+};
+} // namespace espgui