added tutorial cmd and 2 levels

include/levels.hpp

@@ -0,0 +1,5 @@
+#include <string>
+void print_instructions(std::string p);
+void print_no_access_to_level();
+
+bool check_password(int level);

include/tutorial.hpp

@@ -0,0 +1,5 @@
+#pragma once
+
+int roosh_exec_tutorial(char **args, int num_args);
+int roosh_tutorial();
+int create_tutorial_folder();

src/launch.cpp

@@ -1,18 +1,24 @@
 #include "../include/launch.hpp"
 
+#include <cstring>
 #include <string>
 #include <vector>
 
 #include "../include/parse.hpp"
 #include "../include/pipe.hpp"
 #include "../include/redirect.hpp"
+#include "../include/tutorial.hpp"
 
 using namespace std;
 
 bool roosh_launch(const string &line)
 {
     vector<string> cmds = roosh_tokenizer(line, '|');
-
+    auto [args, num_args] = roosh_parse(line);
+    if (strcmp(args[0], "tutorial") == 0)
+    {
+        return roosh_exec_tutorial(args, num_args);
+    }
     // take input for first command
     // from a file if required
     int in_fd = redirect_input(cmds[0]);
@@ -22,6 +28,6 @@ bool roosh_launch(const string &line)
     {
         return 1;
     }
-    
+
     return pipe_exec(cmds, 0, in_fd);
 }

src/levels.cpp

@@ -0,0 +1,57 @@
+#include <iostream>
+#include <cstring>
+#include <fstream>
+using namespace std;
+
+const char *passwd_list[] = {
+
+    "XfwQrTY8drdyR8CDdpcgBSYq",
+    "B7GXVdmXZGDgBXjUrP2aKhnc",
+    "j7uvv2CwUFSujANxHnM2dM4L",
+    "wdJPxNNK66cUGra6JJjbCLRe",
+    "8X8jevLsYwWpZkhvDHXUWu5Q",
+    "fcyHejqsN4LUgqVD9SACZLzh",
+    "Y99Ch3hbZy8QhDm639BCxayF",
+    "Q9n59xHrrTmyRcWc6Ag8m8d9",
+    "JtfU4VftpqH3wbB6cVdjdLqr",
+    "NZAbCFvQuSrPmDgrQHRCj2GZ"};
+
+string curr_pass;
+int curr_level = 1;
+bool unlocked[10];
+
+void print_instructions(string p)
+{
+    string line;
+    ifstream myfile(p);
+    if (myfile.is_open())
+    {
+        while (getline(myfile, line))
+        {
+            cout << line << '\n';
+        }
+        myfile.close();
+    }
+    else
+        cout << "Unable to open file.\nPlease try again.";
+}
+
+void print_no_access_to_level()
+{
+    cout << "Oops! you need to solve all previous levels to unlock this level. Currently you can attempt level " << curr_level << " .\n";
+}
+
+bool check_password(int level)
+{
+    cout << "enter password\n";
+    cin >> curr_pass;
+    if (curr_pass == passwd_list[level - 1])
+    {
+        cout << "Success!!\n";
+        unlocked[level] = 1;
+        curr_level++;
+    }
+    else
+        cout << "wrong password!!\n";
+    return 1;
+}

src/main.cpp

@@ -8,10 +8,12 @@
 #include "../include/launch.hpp"
 #include "../include/input.hpp"
 #include "../include/builtin.hpp"
-using namespace std;
+#include "../include/tutorial.hpp"
 
+using namespace std;
 
-void signal_handler(int sig_num){
+void signal_handler(int sig_num)
+{
     // Prevent user to exit with Ctrl+C
     signal(SIGINT, signal_handler);
     cout << "\n Oops! It seems you are trying to exit. Please use exit command\n";
@@ -23,6 +25,8 @@ int main(int argc, char *argv[])
 {
 
     signal(SIGINT, signal_handler);
+    create_tutorial_folder();
+
     if (argc > 2)
     {
         cerr << "unexpected arguments\n";

src/tutorial.cpp

@@ -0,0 +1,117 @@
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <cstring>
+#include <unistd.h>
+#include <pwd.h>
+#include "../include/parse.hpp"
+#include "../include/launch.hpp"
+#include "../include/levels.hpp"
+#include "../include/tutorial.hpp"
+
+using namespace std;
+
+string home_dir;
+extern bool unlocked[10];
+extern int level;
+int roosh_tutorial();
+
+int create_tutorial_folder()
+{
+    char *home;
+    struct passwd *pw = getpwuid(getuid());
+    home = strdup(pw->pw_dir);
+    home_dir = home;
+    roosh_launch("cp -r tutorial " + home_dir);
+    return 0;
+}
+
+int roosh_exec_tutorial(char **args, int num_args)
+{
+    //number of arguments can be =>
+    // 1 i.e. tutorial
+    // 3 i.e. tutorial level <1-10>
+    // 4 i.e. tutorial level <1-10> password
+
+    //tutorial cmd
+    if (num_args == 1)
+    {
+
+        return roosh_tutorial();
+    }
+
+    // case of 3 or 4 arguments
+    else if ((num_args == 3 || num_args == 4) && (strcmp(args[1], "level") == 0))
+    {
+        if (num_args == 4)
+        { //error if fourth arg is not password
+            if ((strcmp(args[3], "password") != 0))
+            {
+                cerr << "no such command exists\n";
+                return 1;
+            }
+        }
+
+        //parse the level value to int
+        int level;
+        stringstream ss;
+        ss << args[2];
+        ss >> level;
+
+        //level must be b/w 1-10
+        if (level > 0 && level <= 10 && (strlen(args[2]) == level / 10 + 1))
+        {
+
+            if (num_args == 3)
+            {
+                //display corresponding instructins
+                string path = (home_dir + "/tutorial/lvl_instrns/level" + args[2] + ".txt");
+                print_instructions(path);
+
+                //navigate to corresponding directory
+                path = (home_dir + "/tutorial/tutorial_levels/level" + args[2]);
+                chdir(path.c_str());
+            }
+
+            else
+            { // for level 1 just check the password entered
+                if (level == 1)
+                {
+                    check_password(level);
+                    return 1;
+                }
+                //else first check whether the level is unlocked or not
+                else if (unlocked[level - 1])
+                {
+                    check_password(level);
+                    return 1;
+                }
+
+                else
+                {
+                    print_no_access_to_level();
+                }
+            }
+            return 1;
+        }
+
+        else
+        {
+            //display error if level is not an integer bw 1 nd 10
+            cerr << "Please enter a level between 1 to 10.\n";
+            return 1;
+        }
+    }
+
+    else
+    {
+        cerr << "no such command exists\n";
+        return 1;
+    }
+}
+
+int roosh_tutorial()
+{
+    cout << "My tutorial :)\n";
+    return 1;
+}

tutorial/lvl_instrns/level1.txt

@@ -0,0 +1,2 @@
+Commands you may need to solve the level
+ls cd cat

tutorial/lvl_instrns/level2.txt

@@ -0,0 +1,4 @@
+Commands you may need to solve the level
+ls cd cat
+
+Hint: ever heard about hidden files??

tutorial/tutorial_levels/level1/pass.txt

@@ -0,0 +1 @@
+XfwQrTY8drdyR8CDdpcgBSYq

tutorial/tutorial_levels/level2/.here.txt

@@ -0,0 +1 @@
+The password is B7GXVdmXZGDgBXjUrP2aKhnc