EditorDiskDocumentStore.h

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#pragma once
#include "common/Export.h"
 
 
#include "editor/EditorDocumentService.h"
 
#include <filesystem>
#include <functional>
#include <string>
 
namespace eve::editor {
 
class EVENGINE_API_ORCHESTRATION DiskAtomicDocumentStore final : public IAtomicDocumentStore {
public:
    explicit DiskAtomicDocumentStore(std::filesystem::path projectRoot);
 
    Result<StoredDocument> read(const std::string& resourceUri) const override;
    Result<StoredDocument> compareAndSwap(const std::string& resourceUri, Revision expectedRevision,
                                                const std::string& expectedContentHash,
                                                const EditorValue& content) override;
 
    std::filesystem::path resolve(const std::string& resourceUri) const;
    void setBeforeReplaceHook(std::function<bool(const std::filesystem::path&)> hook) {
        beforeReplace_ = std::move(hook);
    }
 
private:
    static Result<StoredDocument> failure(EditorStatus status, const char* rule, std::string message);
    bool replace(const std::filesystem::path& temporary, const std::filesystem::path& destination) const;
 
    std::filesystem::path                             root_;
    std::function<bool(const std::filesystem::path&)> beforeReplace_;
    std::uint64_t                                     sequence_ = 0;
};
 
struct AutosaveDraft {
    DocumentId    document;
    std::string   baseDiskHash;
    std::uint32_t schemaVersion = 1;
    Revision      editRevision  = 0;
    EditorValue   content;
};
 
class EVENGINE_API_ORCHESTRATION AutosaveService {
public:
    AutosaveService(IAtomicDocumentStore* store, std::string projectId)
        : store_(store), projectId_(std::move(projectId)) {}
 
    Result<StoredDocument> writeDraft(const DocumentSnapshot& snapshot, const EditorValue& content);
    Result<AutosaveDraft> readDraft(const DocumentId& document) const;
    bool shouldOfferRecovery(const AutosaveDraft& draft, const DocumentSnapshot& formal) const;
    std::string draftUri(const DocumentId& document) const;
 
private:
    IAtomicDocumentStore* store_ = nullptr;
    std::string           projectId_;
};
 
}  // namespace eve::editor