refactor: add a HashUtils place for hashing stuff

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/modplatform/helpers/HashUtils.h

@@ -0,0 +1,47 @@
+#pragma once
+
+#include <QString>
+
+#include "modplatform/ModIndex.h"
+#include "tasks/Task.h"
+
+namespace Hashing {
+
+class Hasher : public Task {
+   public:
+    using Ptr = shared_qobject_ptr<Hasher>;
+
+    Hasher(QString file_path) : m_path(std::move(file_path)) {}
+
+    /* We can't really abort this task, but we can say we aborted and finish our thing quickly :) */
+    bool abort() override { return true; }
+
+    void executeTask() override = 0;
+
+    QString getResult() const { return m_hash; };
+    QString getPath() const { return m_path; };
+
+   protected:
+    QString m_hash;
+    QString m_path;
+};
+
+class FlameHasher : public Hasher {
+   public:
+    FlameHasher(QString file_path) : Hasher(file_path) { setObjectName(QString("FlameHasher: %1").arg(file_path)); }
+
+    void executeTask() override;
+};
+
+class ModrinthHasher : public Hasher {
+   public:
+    ModrinthHasher(QString file_path) : Hasher(file_path) { setObjectName(QString("ModrinthHasher: %1").arg(file_path)); }
+
+    void executeTask() override;
+};
+
+Hasher::Ptr createHasher(QString file_path, ModPlatform::Provider provider);
+Hasher::Ptr createFlameHasher(QString file_path);
+Hasher::Ptr createModrinthHasher(QString file_path);
+
+}  // namespace Hashing