1 files changed, 156 insertions, 0 deletions
diff --git a/launcher/modplatform/modrinth/ModrinthPackManifest.cpp b/launcher/modplatform/modrinth/ModrinthPackManifest.cpp
new file mode 100644
index 00000000..f1ad39ce
--- /dev/null
+++ b/launcher/modplatform/modrinth/ModrinthPackManifest.cpp
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  PolyMC - Minecraft Launcher
+ *  Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *      Copyright 2013-2021 MultiMC Contributors
+ *      Copyright 2022 kb1000
+ *
+ *      Licensed under the Apache License, Version 2.0 (the "License");
+ *      you may not use this file except in compliance with the License.
+ *      You may obtain a copy of the License at
+ *
+ *          http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *      Unless required by applicable law or agreed to in writing, software
+ *      distributed under the License is distributed on an "AS IS" BASIS,
+ *      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *      See the License for the specific language governing permissions and
+ *      limitations under the License.
+ */
+
+#include "ModrinthPackManifest.h"
+#include "Json.h"
+
+#include "modplatform/modrinth/ModrinthAPI.h"
+
+#include "minecraft/MinecraftInstance.h"
+#include "minecraft/PackProfile.h"
+
+static ModrinthAPI api;
+
+namespace Modrinth {
+
+void loadIndexedPack(Modpack& pack, QJsonObject& obj)
+{
+    pack.id = Json::ensureString(obj, "project_id");
+
+    pack.name = Json::ensureString(obj, "title");
+    pack.description = Json::ensureString(obj, "description");
+    auto temp_author_name = Json::ensureString(obj, "author");
+    pack.author = std::make_tuple(temp_author_name, api.getAuthorURL(temp_author_name));
+    pack.iconName = QString("modrinth_%1").arg(Json::ensureString(obj, "slug"));
+    pack.iconUrl = Json::ensureString(obj, "icon_url");
+}
+
+void loadIndexedInfo(Modpack& pack, QJsonObject& obj)
+{
+    pack.extra.body = Json::ensureString(obj, "body");
+    pack.extra.projectUrl = QString("https://modrinth.com/modpack/%1").arg(Json::ensureString(obj, "slug"));
+    pack.extra.sourceUrl = Json::ensureString(obj, "source_url");
+    pack.extra.wikiUrl = Json::ensureString(obj, "wiki_url");
+
+    pack.extraInfoLoaded = true;
+}
+
+void loadIndexedVersions(Modpack& pack, QJsonDocument& doc)
+{
+    QVector<ModpackVersion> unsortedVersions;
+
+    auto arr = Json::requireArray(doc);
+
+    for (auto versionIter : arr) {
+        auto obj = Json::requireObject(versionIter);
+        auto file = loadIndexedVersion(obj);
+
+        if(!file.id.isEmpty()) // Heuristic to check if the returned value is valid
+            unsortedVersions.append(file);
+    }
+    auto orderSortPredicate = [](const ModpackVersion& a, const ModpackVersion& b) -> bool {
+        // dates are in RFC 3339 format
+        return a.date > b.date;
+    };
+
+    std::sort(unsortedVersions.begin(), unsortedVersions.end(), orderSortPredicate);
+
+    pack.versions.swap(unsortedVersions);
+
+    pack.versionsLoaded = true;
+}
+
+auto validateDownloadUrl(QUrl url) -> bool
+{
+    auto domain = url.host();
+    if(domain == "cdn.modrinth.com")
+        return true;
+    if(domain == "edge.forgecdn.net")
+        return true;
+    if(domain == "media.forgecdn.net")
+        return true;
+    if(domain == "github.com")
+        return true;
+    if(domain == "raw.githubusercontent.com")
+        return true;
+
+    return false;
+}
+
+auto loadIndexedVersion(QJsonObject &obj) -> ModpackVersion
+{
+    ModpackVersion file;
+
+    file.name = Json::requireString(obj, "name");
+    file.version = Json::requireString(obj, "version_number");
+
+    file.id = Json::requireString(obj, "id");
+    file.project_id = Json::requireString(obj, "project_id");
+    
+    file.date = Json::requireString(obj, "date_published");
+
+    auto files = Json::requireArray(obj, "files");
+
+
+    for (auto file_iter : files) {
+        File indexed_file;
+        auto parent = Json::requireObject(file_iter);
+        auto is_primary = Json::ensureBoolean(parent, "primary", false);
+        if (!is_primary) {
+            auto filename = Json::ensureString(parent, "filename");
+            // Checking suffix here is fine because it's the response from Modrinth,
+            // so one would assume it will always be in English.
+            if(!filename.endsWith("mrpack") && !filename.endsWith("zip"))
+                continue;
+        }
+
+        auto url = Json::requireString(parent, "url");
+
+        if(!validateDownloadUrl(url))
+            continue;
+
+        file.download_url = url;
+        if(is_primary)
+            break;
+    }
+
+    if(file.download_url.isEmpty())
+        return {};
+
+    return file;
+}        
+
+}  // namespace Modrinth