Salesforce - Mass generate roles within Salesforce

RoleGenerator

/*
    DESCRIPTION: Genreate roles in Salesforce in bulk. Save your sweat
    USAGE: For details go to https://www.vermanshul.com/2020/02/salesforce-quick-tips-mass-upload-roles.html

*/
public with sharing class RoleGenerator {

    String topRole;
        
    Map<String, String> mapRoleNames = new Map<String, String>();
    

    public RoleGenerator(){
        // Add the top level role manually within your instance and add it's name here
        topRole = 'CEO';

        // EDIT HERE: Replace lines 13-17 with your CODE Column data
        mapRoleNames.put('VP', topRole);
        mapRoleNames.put('VP - Director 1', 'VP');
        mapRoleNames.put('VP - Director 2', 'VP');
        mapRoleNames.put('VP - Director 1 - Manager 1', 'VP - Director 1');
        mapRoleNames.put('VP - Director 1 - Manager 2', 'VP - Director 1');

    } 
    
    // Generate roles and associate roles in given hierarchy
 
    public void generateRoles(){
        UserRole parentRole = [select id, name from UserRole where name = :topRole];
        
        //GENERATE ROLE RECORDS
        Map<String, UserRole> mapRoleObj = new Map<String, UserRole>();
        for(String roleName :mapRoleNames.keyset()){
            UserRole newRole = new UserRole ();
            newRole.Name = roleName;
            newRole.Developername = roleName.replace('/','').replace('+','').replace('-', '_').replace('"', '').replace('/', '').replace('\'', '').replace('(', '').replace(')','').replace(' ','').replace('__','_').trim();
            newRole.ParentRoleId = parentRole.id;
            mapRoleObj.put(roleName, newRole);
        }
        
        // INSERT ROLES
        insert mapRoleObj.values();
        
        mapRoleObj.put('Merchandising - Top Level',parentRole);
        
        //ASSOCIATE ROLES WITH PARENT
        for(UserRole rl : mapRoleObj.values()){
            String parentRoleName = mapRoleNames.get(rl.Name);
            if(mapRoleObj.containsKey(parentRoleName)) rl.ParentRoleId = mapRoleObj.get(parentRoleName).id;
        }
        
        update mapRoleObj.values();
    }
}