ArchiveFileSystem.h

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#pragma once
 
#include <fstream>
#include <map>
#include <string>
#include <vector>
 
#include <tdme/tdme.h>
#include <tdme/os/filesystem/fwd-tdme.h>
#include <tdme/os/filesystem/FileSystemInterface.h>
#include <tdme/os/threading/Mutex.h>
#include <tdme/utilities/fwd-tdme.h>
 
using std::ifstream;
using std::map;
using std::string;
using std::vector;
 
using tdme::os::filesystem::FileNameFilter;
using tdme::os::filesystem::FileSystemInterface;
using tdme::os::threading::Mutex;
 
/**
 * Archive file system implementation
 * @author Andreas Drewke
 */
class tdme::os::filesystem::ArchiveFileSystem final: public FileSystemInterface
{
private:
    struct FileInformation {
        string name;
        uint64_t bytes;
        uint8_t compressed;
        uint64_t bytesCompressed;
        uint64_t offset;
        bool executable;
    };
    string fileName;
    Mutex ifsMutex;
    ifstream ifs;
    map<string, FileInformation> fileInformations;
 
    /**
     * Decompress from archive
     * @param inContent compressed content
     * @param outContent uncompressed out content
     * @throws tdme::os::filesystem::FileSystemException
     */
    void decompress(vector<uint8_t>& inContent, vector<uint8_t>& outContent);
 
public:
    /**
     * Public constructor
     * @param fileName archive file name
     */
    ArchiveFileSystem(const string& fileName = "archive.ta");
 
    /**
     * Public destructor
     */
    virtual ~ArchiveFileSystem();
 
    /**
     * @return Returns underlying TDME2 archive file name
     */
    const string& getArchiveFileName();
 
    // overridden methods
    const string getFileName(const string& path, const string& fileName) override;
    void list(const string& pathName, vector<string>& files, FileNameFilter* filter = nullptr, bool addDrives = false) override;
    bool isPath(const string& pathName) override;
    bool isDrive(const string& pathName) override;
    bool fileExists(const string& fileName) override;
    bool isExecutable(const string& pathName, const string& fileName) override;
    void setExecutable(const string& pathName, const string& fileName) override;
    uint64_t getFileSize(const string& pathName, const string& fileName) override;
    const string getContentAsString(const string& pathName, const string& fileName) override;
    void setContentFromString(const string& pathName, const string& fileName, const string& content) override;
    void getContent(const string& pathName, const string& fileName, vector<uint8_t>& content) override;
    void setContent(const string& pathName, const string& fileName, const vector<uint8_t>& content) override;
    void getContentAsStringArray(const string& pathName, const string& fileName, vector<string>& content) override;
    void setContentFromStringArray(const string& pathName, const string& fileName, const vector<string>& content) override;
    const string getCanonicalPath(const string& pathName, const string& fileName) override;
    const string getCurrentWorkingPathName() override;
    void changePath(const string& pathName) override;
    const string getPathName(const string& fileName) override;
    const string getFileName(const string& fileName) override;
    void createPath(const string& pathName) override;
    void removePath(const string& pathName, bool recursive) override;
    void removeFile(const string& pathName, const string& fileName) override;
    bool getThumbnailAttachment(const string& pathName, const string& fileName, vector<uint8_t>& thumbnailAttachmentContent) override;
    bool getThumbnailAttachment(const vector<uint8_t>& content, vector<uint8_t>& thumbnailAttachmentContent) override;
 
    /**
     * Compute SHA256 hash
     */
    const string computeSHA256Hash();
};