Method implementAPI

Register.java:79–132

(String[] logs)

        String[] apis = { "register user05 qwerty", "login user05 qwerty", "logout user05"         };          
        implementAPI(apis);      
    }      public static void implementAPI(String[] logs) {         
        String[] res = new String[logs.length];                
        HashMap<String, List<String>> userNamePwdMap = new HashMap<>();          
        for (int i = 0; i < logs.length; i++) {                          
            String[] userInfo = logs[i].split(" ");                          
            if (userInfo[0].equalsIgnoreCase("register")) 
            {                               
                if (userNamePwdMap.containsKey(userInfo[1])) {                     
                    res[i] = "Username already exists";                 
                } 
                else 
                {                                         
                    List<String> list = new ArrayList<>();                     
                    list.add(userInfo[2]);                     
                    list.add("logged_out");                     
                    userNamePwdMap.put(userInfo[1], list);                     
                    res[i] = "Registered successfully";                 
                }             
            } 
            else 
            if (userInfo[0].equalsIgnoreCase("login")) 
            {                 
                if (userNamePwdMap.containsKey(userInfo[1])) {                                  
                    if (userNamePwdMap.get(userInfo[1]).get(0).equals(userInfo[2]) &&                             
                    userNamePwdMap.get(userInfo[1]).get(1).equalsIgnoreCase("logged_out")) {                         
                        userNamePwdMap.get(userInfo[1]).set(1, "logged_in");                         
                        res[i] = "Logged In Successfully";                     
                    } 
                    else 
                    {                                                 
                        res[i] = "Already Logged In";                     
                    }                 
                } else 
                {                     
                    res[i] = "Login Unsuccessful";                 
                }             
            } 
            else 
            if (userInfo[0].equalsIgnoreCase("logout")) {                                 
                if (userNamePwdMap.containsKey(userInfo[1])                         
                && userNamePwdMap.get(userInfo[1]).get(1).equalsIgnoreCase("logged_in")) {                     
                    userNamePwdMap.get(userInfo[1]).set(1,"logged_out");                     
                    res[i] = "Logged out Successfully";                 
                } 
                else 
                {                     
                    res[i] = "Logout Unsuccessful";                 
                }             
            }         
        }          
        for(int i=0;i< res.length;i++){             
            System.out.print(res[i]+",");         
        }         System.out.println();      
    } 
}