Triggers

trigger InsereAccountNumberNaoRepetido on Account (before insert) {
    for (Account a : Trigger.new) {
        System.debug('Nome da conta: '+a.name);
        System.debug('AccountNumber: '+a.accountnumber);
        if(a.accountnumber != null){
            if(a.accountnumber.length() != 8 || a.accountnumber == ''){
                a.accountnumber = AccountNumber.geraAccountNumber();
            }else{
                while(AccountNumber.verificaExistencia(a.AccountNumber)){
                    System.debug('Verifica existencia: '+AccountNumber.verificaExistencia(a.AccountNumber));
                    a.AccountNumber = AccountNumber.geraAccountNumber();
                }
            }
        }
        System.debug('Nome da conta: '+a.name);
        System.debug('AccountNumber: '+a.accountnumber);
        System.debug('Site: '+a.website);
    }

}

public class AccountNumber {
    public static String geraAccountNumber(){
        Double d = Math.random()*(10^17);
        String ran = String.valueOf(d);
        String an = ran.right(8);
        return an;
    }

    public static Boolean verificaExistencia(String an){
        List<Account> lista = [SELECT AccountNumber FROM Account WHERE AccountNumber = :an];
        return lista.size()!=0?true:false;
    }
}


trigger ClosedOpportunityTrigger on Opportunity (after insert, after update) {
  List<Task> taskList = new List<Task>();

  for(Opportunity opp:Trigger.new){
    if(Trigger.isInsert){
      if(opp.StageName == 'Closed Won'){
        taskList.add(new Task(Subject = 'Follow up test task', WhatId = opp.Id));
      }
    }
    if(Trigger.isUpdate){
      Opportunity o = Trigger.oldMap.get(opp.Id);
      if(opp.StageName == 'Closed Won' && opp.StageName != o.StageName){
        taskList.add(new Task(Subject = 'Follow up test task', WhatId = opp.Id));
      }
    }
  }
  if(taskList.size()>0){
    ClasseDAO.insereListaTask(taskList);
  }
}

public with sharing class ClasseDAO {
    public static void insereListaTask(List<Task> tasks){
        try{
            Database.SaveResult[] resultados = Database.insert(tasks, false);
            for(Database.SaveResult dsr:resultados){
                if(dsr.isSuccess()){
                    System.debug('Task inserida com sucesso: '+dsr.getId());
                }else{
                    List<Database.Error> dbeList = dsr.getErrors();
                    for(Database.Error dbe:dbeList){
                        System.debug('Erro: ');
                        System.debug(dbe.getStatusCode()+' - '+dbe.getMessage());
                        System.debug('Campos do erro: ');
                        System.debug(dbe.getFields());
                    }
                }
            }
        }catch(Exception e){
            System.debug(e.getMessage());
        }
    }
}

//Anonymous
try{
List<Opportunity> ops = new List<Opportunity>{
new Opportunity(Name='Oportunidade teste Prospecting', StageName='Prospecting', CloseDate= Date.valueOf('2023-05-15'), Description='Nova oportunidade'),
new Opportunity(Name='Oportunidade teste ClosedLost', StageName='Closed Lost', CloseDate=Date.valueOf('2023-05-15'), Description='Nova oportunidade'),
new Opportunity(Name='Oportunidade teste ClosedWon', StageName='Closed Won', CloseDate=Date.valueOf('2023-05-15'), Description='Nova oportunidade'),
new Opportunity(Id='0068Y00001OBqmZQAT', StageName='Closed Won', CloseDate=Date.valueOf('2023-05-15'), Description='Nova oportunidade'),
new Opportunity(Id='0068Y00001OBqmhQAD', StageName='Closed Won', CloseDate=Date.valueOf('2023-05-15'), Description='Nova oportunidade')};//Está em Closed Won - Edge
upsert ops;
}catch(Exception e){
  System.debug(e.getMessage());
}