Add ZoneScriptString class to store zone script strings

src/ZoneCommon/Zone/ZoneScriptStrings.cpp

@@ -0,0 +1,57 @@
+#include "ZoneScriptStrings.h"
+
+#include <stdexcept>
+#include <sstream>
+
+scr_string_t ZoneScriptStrings::AddScriptString(const std::string& value)
+{
+    if(m_scr_strings.empty())
+    {
+        m_scr_strings.emplace_back("");
+        m_scr_string_lookup[""] = static_cast<scr_string_t>(0);
+    }
+    else
+    {
+        const auto existingScriptString = m_scr_string_lookup.find(value);
+        if (existingScriptString != m_scr_string_lookup.end())
+            return existingScriptString->second;
+    }
+
+    const auto newScrStringIndex = static_cast<scr_string_t>(m_scr_strings.size());
+    m_scr_strings.emplace_back(value);
+    m_scr_string_lookup[value] = newScrStringIndex;
+
+    return newScrStringIndex;
+}
+
+size_t ZoneScriptStrings::Count() const
+{
+    return m_scr_strings.size();
+}
+
+bool ZoneScriptStrings::Empty() const
+{
+    return m_scr_strings.empty();
+}
+
+const std::string& ZoneScriptStrings::operator[](const size_t index) const
+{
+    if(index > m_scr_strings.size())
+    {
+        std::ostringstream str;
+        str << "Script string index '" << index << "' is not inside range of zone script strings (count: " << m_scr_strings.size() << ")";
+        throw std::runtime_error(str.str());
+    }
+
+    return m_scr_strings[index];
+}
+
+std::vector<std::string>::const_iterator ZoneScriptStrings::begin() const
+{
+    return m_scr_strings.cbegin();
+}
+
+std::vector<std::string>::const_iterator ZoneScriptStrings::end() const
+{
+    return m_scr_strings.end();
+}