refactor: remove old config (#2097)

fixes #1805

---------

Co-authored-by: Ayaz Salikhov <mathbunnyru@users.noreply.github.com>
Co-authored-by: Maria Shodunke <maria-robobug@users.noreply.github.com>
Co-authored-by: Sergey Kuznetsov <skuznetsov@ripple.com>

src/util/config/ObjectView.cpp

@@ -0,0 +1,100 @@
+//------------------------------------------------------------------------------
+/*
+    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/config/ObjectView.hpp"
+
+#include "util/Assert.hpp"
+#include "util/config/ArrayView.hpp"
+#include "util/config/ConfigDefinition.hpp"
+#include "util/config/ValueView.hpp"
+
+#include <fmt/core.h>
+
+#include <algorithm>
+#include <cstddef>
+#include <string>
+#include <string_view>
+#include <utility>
+
+namespace util::config {
+
+ObjectView::ObjectView(std::string_view prefix, ClioConfigDefinition const& clioConfig)
+    : prefix_{prefix}, clioConfig_{clioConfig}
+{
+}
+
+ObjectView::ObjectView(std::string_view prefix, std::size_t arrayIndex, ClioConfigDefinition const& clioConfig)
+    : prefix_{prefix}, arrayIndex_{arrayIndex}, clioConfig_{clioConfig}
+{
+}
+
+bool
+ObjectView::containsKey(std::string_view key) const
+{
+    return clioConfig_.get().contains(getFullKey(key));
+}
+
+ValueView
+ObjectView::getValueView(std::string_view key) const
+{
+    auto const fullKey = getFullKey(key);
+    if (arrayIndex_.has_value()) {
+        return clioConfig_.get().getArray(fullKey).valueAt(arrayIndex_.value());
+    }
+    return clioConfig_.get().getValueView(fullKey);
+}
+
+ObjectView
+ObjectView::getObject(std::string_view key) const
+{
+    auto const fullKey = getFullKey(key);
+    if (startsWithKey(fullKey) && !arrayIndex_.has_value()) {
+        return clioConfig_.get().getObject(fullKey);
+    }
+    if (startsWithKey(fullKey) && arrayIndex_.has_value()) {
+        return ObjectView(fullKey, arrayIndex_.value(), clioConfig_);
+    }
+    ASSERT(false, "Key {} does not exist in object", fullKey);
+    std::unreachable();
+}
+
+ArrayView
+ObjectView::getArray(std::string_view key) const
+{
+    auto fullKey = getFullKey(key);
+    if (!fullKey.contains(".[]"))
+        fullKey += ".[]";
+
+    ASSERT(clioConfig_.get().hasItemsWithPrefix(fullKey), "Key {} does not exist in object", fullKey);
+    return clioConfig_.get().getArray(fullKey);
+}
+
+std::string
+ObjectView::getFullKey(std::string_view key) const
+{
+    return fmt::format("{}.{}", prefix_, key);
+}
+
+bool
+ObjectView::startsWithKey(std::string_view key) const
+{
+    return std::ranges::any_of(clioConfig_.get(), [&key](auto const& pair) { return pair.first.starts_with(key); });
+}
+
+}  // namespace util::config