1 files changed, 63 insertions, 5 deletions
diff --git a/lib/db_file.h b/lib/db_file.h
index e5ae7b50..4425f52c 100644
--- a/lib/db_file.h
+++ b/lib/db_file.h
@@ -14,17 +14,75 @@ namespace zen
 {
 const Zstring SYNC_DB_FILE_ENDING = Zstr(".ffs_db");
 
-struct DirInformation
+//artificial hierarchy of last synchronous state:
+struct InSyncFile
 {
-    DirContainer baseDirContainer; //hierarchical directory information
+    enum InSyncType
+    {
+        IN_SYNC_BINARY_EQUAL,     //checked file content
+        IN_SYNC_ATTRIBUTES_EQUAL, //only "looks" like they're equal
+    };
+
+    InSyncFile(const FileDescriptor& l, const FileDescriptor& r, InSyncType type) : left(l), right(r), inSyncType(type) {}
+    FileDescriptor left;
+    FileDescriptor right;
+    InSyncType inSyncType;
+};
+
+struct InSyncSymlink
+{
+    InSyncSymlink(const LinkDescriptor& l, const LinkDescriptor& r) : left(l), right(r) {}
+    LinkDescriptor left;
+    LinkDescriptor right;
+};
+
+struct InSyncDir
+{
+    //for directories we have a logical problem: we cannot have "not existent" as an indicator for "no last synchronous state" since this precludes
+    //child elements that may be in sync!
+    enum InSyncStatus
+    {
+        STATUS_IN_SYNC,
+        STATUS_STRAW_MAN //there is no last synchronous state, but used as container only
+    };
+    InSyncDir(InSyncStatus statusIn) : status(statusIn) {}
+
+    InSyncStatus status;
+
+    //------------------------------------------------------------------
+    typedef std::map<Zstring, InSyncDir,     LessFilename> DirList;  //
+    typedef std::map<Zstring, InSyncFile,    LessFilename> FileList; // key: shortName
+    typedef std::map<Zstring, InSyncSymlink, LessFilename> LinkList; //
+    //------------------------------------------------------------------
+
+    DirList  dirs;
+    FileList files;
+    LinkList symlinks; //non-followed symlinks
+
+    //convenience
+    InSyncDir& addDir(const Zstring& shortName, InSyncStatus statusIn)
+    {
+        //use C++11 emplace when available
+        return dirs.insert(std::make_pair(shortName, InSyncDir(statusIn))).first->second;
+    }
+
+    void addFile(const Zstring& shortName, const FileDescriptor& dataL, const FileDescriptor& dataR, InSyncFile::InSyncType type)
+    {
+        files.insert(std::make_pair(shortName, InSyncFile(dataL, dataR, type)));
+    }
+
+    void addSymlink(const Zstring& shortName, const LinkDescriptor& dataL, const LinkDescriptor& dataR)
+    {
+        symlinks.insert(std::make_pair(shortName, InSyncSymlink(dataL, dataR)));
+    }
 };
-typedef std::shared_ptr<const DirInformation> DirInfoPtr;
+
 
 DEFINE_NEW_FILE_ERROR(FileErrorDatabaseNotExisting);
 
-std::pair<DirInfoPtr, DirInfoPtr> loadFromDisk(const BaseDirMapping& baseMapping); //throw FileError, FileErrorDatabaseNotExisting -> return value always bound!
+std::shared_ptr<InSyncDir> loadLastSynchronousState(const BaseDirMapping& baseMapping); //throw FileError, FileErrorDatabaseNotExisting -> return value always bound!
 
-void saveToDisk(const BaseDirMapping& baseMapping); //throw FileError
+void saveLastSynchronousState(const BaseDirMapping& baseMapping); //throw FileError
 }
 
 #endif // DBFILE_H_INCLUDED