snapshot.cpp

/*============================================================
    @author - Rushitkumar Jasani   @rollno - 2018201034
=============================================================*/
#ifndef MYHEADER_H
#define MYHEADER_H
#include "myheader.h"
#endif

#ifndef GLOBAL_H
#define GLOBAL_H
#include "global.h"
#endif

/*============================================================
helper function for DFS in snapshot recursively.
=============================================================*/
void snapshot_file(string d_path, string p_path)
{
    DIR* dp;
    dp = opendir(d_path.c_str());
    struct dirent* d;
    vector<string> dir;
    if (dp == NULL) {
        perror("opendir");
        return;
    }
    fout << p_path << " :" << endl;
    while ((d = readdir(dp))) {
        if (strcmp(d->d_name, ".") == 0 || strcmp(d->d_name, "..") == 0)
            continue;
        else {
            string name = string(d->d_name);
            fout << name << endl;
            string tmp_path = d_path + "/" + name;
            if (isDirectory(tmp_path))
                dir.push_back(name);
        }
    }
    fout << endl
         << endl;
    for (unsigned int i = 0; i < dir.size(); i++) {
        string d1 = d_path + "/" + dir[i];
        string p1 = p_path + "/" + dir[i];
        snapshot_file(d1, p1);
    }
    return;
}
/*============================================================
snapshot <folder> <file>
=============================================================*/
void snapshot()
{
    if (my_command.size() != 3)
        printf("improper arguments\n");
    else {
        string d_path = create_absolute_path(my_command[1]);
        if (!isDirectory(d_path)) {
            cout << "First Argument must be valid Folder name." << endl;
            return;
        }
        string file_path = create_absolute_path(my_command[2]);
        if (isFileExist(file_path)) {
            cout << "File Already Exist" << endl;
            return;
        }
        fout.open(file_path);
        snapshot_file(d_path, ".");
        fout.close();
        cout << "snapshot saved" << endl;
    }
    return;
}