Ledger entry type filter for account_objects and ledger_data (#1116)

Fix #1109

src/util/TxUtils.cpp

@@ -0,0 +1,47 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of clio: https://github.com/XRPLF/clio
+    Copyright (c) 2024, the clio developers.
+
+    Permission to use, copy, modify, and distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL,  DIRECT,  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include "util/JsonUtils.h"
+
+#include <ripple/protocol/TxFormats.h>
+
+#include <algorithm>
+#include <iterator>
+#include <string>
+#include <unordered_set>
+
+namespace util {
+
+std::unordered_set<std::string> const&
+getTxTypesInLowercase()
+{
+    static std::unordered_set<std::string> const typesKeysInLowercase = []() {
+        std::unordered_set<std::string> keys;
+        std::transform(
+            ripple::TxFormats::getInstance().begin(),
+            ripple::TxFormats::getInstance().end(),
+            std::inserter(keys, keys.begin()),
+            [](auto const& pair) { return util::toLower(pair.getName()); }
+        );
+        return keys;
+    }();
+
+    return typesKeysInLowercase;
+}
+}  // namespace util