Worlds indexing

src/content/ContentLUT.h

@@ -0,0 +1,58 @@
+#ifndef CONTENT_CONTENT_LUT_H_
+#define CONTENT_CONTENT_LUT_H_
+
+#include <string>
+#include <vector>
+#include <filesystem>
+
+#include "../typedefs.h"
+#include "../constants.h"
+
+class Content;
+
+/* Content indices lookup table or report 
+   used to convert world with different indices
+   Building with indices.json */
+class ContentLUT {
+    std::vector<blockid_t> blocks;
+    std::vector<std::string> blockNames;
+
+    bool reorderContent = false;
+    bool missingContent = false;
+public:
+    ContentLUT(size_t blocks, const Content* content);
+
+    inline const std::string& getBlockName(blockid_t index) const {
+        return blockNames[index];
+    }
+
+    inline blockid_t getBlockId(blockid_t index) const {
+        return blocks[index];
+    }
+
+    inline void setBlock(blockid_t index, std::string name, blockid_t id) {
+        blocks[index] = id;
+        blockNames[index] = name;
+        if (id == BLOCK_VOID) {
+            missingContent = true;
+        } else if (index != id) {
+            reorderContent = true;
+        }
+    }
+
+    static ContentLUT* create(const std::filesystem::path& filename, 
+                                   const Content* content);
+    
+    inline bool hasContentReorder() const {
+        return reorderContent;
+    }
+    inline bool hasMissingContent() const {
+        return missingContent;
+    }
+
+    inline size_t countBlocks() const {
+        return blocks.size();
+    }
+};
+
+#endif // CONTENT_CONTENT_LUT_H_