Add member function to process db into more friendly form.

src/common/db.cpp

@@ -18,7 +18,8 @@
 
 #include "db.h"
 
-#include <buffer.h>
+#include "buffer.h"
+#include "common.h"
 
 std::string getSqlType(FieldType type)
 {
@@ -146,3 +147,45 @@ void db::open(const path &p)
     for (auto &v : values)
         v.load_fields(t, b);
 }
+
+polygon4::tools::db::processed_db db::process() const
+{
+    auto process_string = [](const auto &s)
+    {
+        return str2utf8(s);
+    };
+
+    polygon4::tools::db::processed_db pdb;
+    for (auto &v : values)
+    {
+        auto tbl = t.tables.find(v.table_id);
+        if (tbl == t.tables.end())
+            continue;
+        polygon4::tools::db::record r;
+        for (auto &f : v.fields)
+        {
+            auto fld = t.fields.find(f.field_id);
+            if (fld == t.fields.end())
+                continue;
+            auto name = process_string(fld->second.name);
+            switch (fld->second.type)
+            {
+            case FieldType::String:
+                r[name] = process_string(f.s.c_str());
+                break;
+            case FieldType::Integer:
+                r[name] = f.i;
+                break;
+            case FieldType::Float:
+                r[name] = f.f;
+                break;
+            default:
+                assert(false);
+            }
+        }
+        auto table_name = process_string(tbl->second.name);
+        auto row_name = process_string(v.name);
+        pdb[table_name][row_name] = r;
+    }
+    return pdb;
+}

src/common/db.h

@@ -90,6 +90,14 @@ struct value
     void load_fields(const tab &tab, buffer &b);
 };
 
+namespace polygon4::tools::db
+{
+    using value = std::variant<std::string, int, float>;
+    using record = std::map<std::string, value>;
+    using table = std::map<std::string, record>;
+    using processed_db = std::map<std::string, table>;
+};
+
 struct db
 {
     uint32_t number_of_values = 0;
@@ -99,4 +107,5 @@ struct db
 
     void load(const buffer &b);
     void open(const path &basename);
+    polygon4::tools::db::processed_db process() const;
 };