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/Array.cpp

@@ -0,0 +1,101 @@
+//------------------------------------------------------------------------------
+/*
+    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/Array.hpp"
+
+#include "util/Assert.hpp"
+#include "util/config/ConfigValue.hpp"
+#include "util/config/Error.hpp"
+#include "util/config/Types.hpp"
+
+#include <cstddef>
+#include <optional>
+#include <string_view>
+#include <utility>
+#include <vector>
+
+namespace util::config {
+
+Array::Array(ConfigValue arg) : itemPattern_{std::move(arg)}
+{
+}
+
+std::string_view
+Array::prefix(std::string_view key)
+{
+    static constexpr std::string_view kARRAY_SUFFIX = ".[]";
+    ASSERT(key.contains(kARRAY_SUFFIX), "Provided key is not an array key: {}", key);
+
+    return key.substr(0, key.rfind(kARRAY_SUFFIX) + kARRAY_SUFFIX.size());
+}
+
+std::optional<Error>
+Array::addValue(Value value, std::optional<std::string_view> key)
+{
+    auto newItem = itemPattern_;
+
+    if (auto const maybeError = newItem.setValue(value, key); maybeError.has_value())
+        return maybeError;
+    elements_.emplace_back(std::move(newItem));
+    return std::nullopt;
+}
+
+std::optional<Error>
+Array::addNull(std::optional<std::string_view> key)
+{
+    if (not itemPattern_.isOptional() and not itemPattern_.hasValue()) {
+        return Error{key.value_or("Unknown_key"), "value for the array (or object field inside array) is required"};
+    }
+
+    elements_.push_back(itemPattern_);
+    return std::nullopt;
+}
+
+size_t
+Array::size() const
+{
+    return elements_.size();
+}
+
+ConfigValue const&
+Array::at(std::size_t idx) const
+{
+    ASSERT(idx < elements_.size(), "Index is out of scope");
+    return elements_[idx];
+}
+
+ConfigValue const&
+Array::getArrayPattern() const
+{
+    return itemPattern_;
+}
+
+std::vector<ConfigValue>::const_iterator
+Array::begin() const
+{
+    return elements_.begin();
+}
+
+std::vector<ConfigValue>::const_iterator
+Array::end() const
+{
+    return elements_.end();
+}
+
+}  // namespace util::config