Universal-Updater Full Rewrite based of UniStore v3.0.0. (#51)

* No Nightlies for the Full-Rewrite.

* Initial push, i guess.

* Forgot to push the Test UniStore + T3X...

* Use C2D flags for wrapping and centering

* gitignore t3x correctly

* Remove Test Store and hardcode to `sdmc:/3ds/Universal-Updater/stores/Universal-DB.unistore` for now.

* Is functional now.

* *More special checks and work.*

* const <typename T> &.

* Universal-DB, not Universal DB.

* Derp.

* Make 3DSX, NDS & Archive path configurable.

* Last fixes + Fade out screen on exit.

* See Desc. for more.

- Add QR Code scan for downloading UniStores.
- Add new Graphics.
- Some fixes + improvements.

* Fix search filtering, re-sort after search

* Fix update check

* Clear search items with X, not just reset results

* The next progress.

* PLEASE tell me, this is the only error..

Co-authored-by: Pk11 <epicpkmn11@outlook.com>

source/utils/lang.cpp

@@ -0,0 +1,55 @@
+/*
+*   This file is part of Universal-Updater
+*   Copyright (C) 2019-2020 Universal-Team
+*
+*   This program is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*
+*   Additional Terms 7.b and 7.c of GPLv3 apply to this file:
+*       * Requiring preservation of specified reasonable legal notices or
+*         author attributions in that material or in the Appropriate Legal
+*         Notices displayed by works containing it.
+*       * Prohibiting misrepresentation of the origin of that material,
+*         or requiring that modified versions of such material be marked in
+*         reasonable ways as different from the original version.
+*/
+
+#include "lang.hpp"
+#include <stdio.h>
+#include <unistd.h>
+
+static nlohmann::json appJson;
+
+std::string Lang::get(const std::string &key) {
+	if (!appJson.contains(key)) return "";
+
+	return appJson.at(key).get_ref<const std::string&>();
+}
+
+void Lang::load(const std::string &lang) {
+	FILE *values;
+
+	/* Check if exist. */
+	if (access(("romfs:/lang/" + lang + "/app.json").c_str(), F_OK) == 0) {
+		values = fopen(std::string(("romfs:/lang/" + lang + "/app.json")).c_str(), "rt");
+		appJson = nlohmann::json::parse(values, nullptr, false);
+		fclose(values);
+		return;
+
+	} else {
+		values = fopen(("romfs:/lang/en/app.json"), "rt");
+		appJson = nlohmann::json::parse(values, nullptr, false);
+		fclose(values);
+		return;
+	}
+}