1 files changed, 86 insertions, 0 deletions
diff --git a/launcher/modplatform/ModIndex.cpp b/launcher/modplatform/ModIndex.cpp
new file mode 100644
index 00000000..3c4b7887
--- /dev/null
+++ b/launcher/modplatform/ModIndex.cpp
@@ -0,0 +1,86 @@
+// 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/>.
+*/
+
+#include "modplatform/ModIndex.h"
+
+#include <QCryptographicHash>
+
+namespace ModPlatform {
+
+auto ProviderCapabilities::name(Provider p) -> const char*
+{
+    switch (p) {
+        case Provider::MODRINTH:
+            return "modrinth";
+        case Provider::FLAME:
+            return "curseforge";
+    }
+    return {};
+}
+auto ProviderCapabilities::readableName(Provider p) -> QString
+{
+    switch (p) {
+        case Provider::MODRINTH:
+            return "Modrinth";
+        case Provider::FLAME:
+            return "CurseForge";
+    }
+    return {};
+}
+auto ProviderCapabilities::hashType(Provider p) -> QStringList
+{
+    switch (p) {
+        case Provider::MODRINTH:
+            return { "sha512", "sha1" };
+        case Provider::FLAME:
+            // Try newer formats first, fall back to old format
+            return { "sha1", "md5", "murmur2" };
+    }
+    return {};
+}
+auto ProviderCapabilities::hash(Provider p, QByteArray& data, QString type) -> QByteArray
+{
+    switch (p) {
+        case Provider::MODRINTH: {
+            // NOTE: Data is the result of reading the entire JAR file!
+
+            // If 'type' was specified, we use that
+            if (!type.isEmpty() && hashType(p).contains(type)) {
+                if (type == "sha512")
+                    return QCryptographicHash::hash(data, QCryptographicHash::Sha512);
+                else if (type == "sha1")
+                    return QCryptographicHash::hash(data, QCryptographicHash::Sha1);
+            }
+
+            return QCryptographicHash::hash(data, QCryptographicHash::Sha512);
+        }
+        case Provider::FLAME:
+            // If 'type' was specified, we use that
+            if (!type.isEmpty() && hashType(p).contains(type)) {
+                if(type == "sha1")
+                    return QCryptographicHash::hash(data, QCryptographicHash::Sha1);
+                else if (type == "md5")
+                    return QCryptographicHash::hash(data, QCryptographicHash::Md5);
+            }
+            
+            break;
+    }
+    return {};
+}
+
+}  // namespace ModPlatform