<?php

class IbanValidator {
  
  public static function validate($iban, $bic = false) {
    if(!$iban) {
      return false;
    }

    if(!defined("TT_IBAN_VALIDATOR_BASEURL") || !TT_IBAN_VALIDATOR_BASEURL) {
        return ["bank" => "none", "iban" => "none", "bic" => [], "iban_correct" => true, "iban_sus" => false, "bic_correct" => true];
    }
    
    $creds = TT_IBAN_VALIDATOR_USER.":".TT_IBAN_VALIDATOR_PASS;
    $b64creds = base64_encode($creds);
    
    $ctx = stream_context_create([
      "http" => [
        "header" => "Authorization: Basic $b64creds"
      ]
    ]);
    
    $url = TT_IBAN_VALIDATOR_BASEURL.$iban;
    $resp = file_get_contents($url, false, $ctx);
    
    if($resp) {
      $data = json_decode($resp);
    }
    
    $iban_correct = false;
    $iban_sus = false;
    $bic_correct = false;
    $potential_bics = [];
    $bank = false;
    
    if($data->result == "passed") {
      $iban_correct = true;
    }
    
    if(is_array($data->all_bic_candidates) && count($data->all_bic_candidates)) {
      foreach($data->all_bic_candidates as $bic_candidate) {
        if(!$bic_candidate->bic) continue;
        $potential_bics[] = $bic_candidate->bic;
        
        if($bic_candidate->bic == $bic) {
          $bic_correct = true;
        }
      }
    }
    
    if($data->iban_listed) {
      $iban_sus = $data->iban_listed;
    }
    
    if($data->bank) {
      $bank = $data->bank;
    }
    
    return ["bank" => $bank, "iban" => $data->iban, "bic" => $potential_bics, "iban_correct" => $iban_correct, "iban_sus" => $iban_sus, "bic_correct" => $bic_correct];
  }
}