global class BatchDeactivateUsers implements Database.Batchable<sobject> {
    global Database.QueryLocator start(Database.BatchableContext BC) {
        Map<String,daystodeactivateuser__c> csdaystodeactivateuser = daystodeactivateuser__c.getAll();
        integer noOfDays=0;
        if(csdaystodeactivateuser!=null){
            noOfDays = integer.ValueOf(csdaystodeactivateuser.get('numberofdaysemailnotificationsent').Numberofdays__c);
        }
        string query = 'SELECT Id,isActive,LastLoginDate,UserDeactivationDate__c FROM User where isActive=true and UserDeactivationDate__c!=null and UserDeactivationDate__c = TODAY and lastlogindate < LAST_N_DAYS:'+noOfDays;
        if (!Test.IsRunningTest()) {
            return Database.getQueryLocator(query);
        } else {
            return Database.getQueryLocator('SELECT Id,isActive,LastLoginDate,UserDeactivationDate__c FROM User limit 1');
        }
    }
    global void execute(Database.BatchableContext BC, List<user> userList) {
        for (User usrRec: userList) {
            usrRec.isActive = false;
            if(usrRec.contactId!=null){
                usrRec.isPortalenabled = false;  
            }
        }
        if (userList.size() > 0 && !Test.isRunningTest()) {
            update userList;
        }
    }
    global void finish(Database.BatchableContext BC) {}
}