function sms_valid_validate in SMS Framework 6

Same name and namespace in other branches

1. 6.2 modules/sms_valid/sms_valid.module \sms_valid_validate()
2. 7 modules/sms_valid/sms_valid.module \sms_valid_validate()

Validate a number

Parameters

$number: A phone number.

$options: An array of options.

• dir : Direction of message. See SMS_DIR_* constants.

Return value

Array with the validation result.

• pass : The validation result.
  • TRUE if the number passed validation checks.
  • FALSE if the number is denied by validation.
  • NULL if the number could not be validated.
• log : Array of log strings. The last record is the most significant.

2 calls to sms_valid_validate()

sms_valid_admin_test_form_submit in modules/sms_valid/sms_valid.admin.inc

sms_valid_sms_validate in modules/sms_valid/sms_valid.module

Implement hook_sms_validate()

File

modules/sms_valid/sms_valid.module, line 460

Number validation feature module for Drupal SMS Framework.

Code

function sms_valid_validate(&$number, &$options = array()) {
  $result = array(
    'pass' => NULL,
    'log' => array(),
  );

  // Set the default direction if not specified in options
  $dir = array_key_exists('dir', $options) ? $options['dir'] : SMS_DIR_OUT;
  $use_global_ruleset = variable_get('sms_valid_use_global_ruleset', FALSE);
  $global_ruleset = variable_get('sms_valid_global_ruleset', '64');
  $local_number_prefix = variable_get('sms_valid_local_number_prefix', '0');
  $local_number_ruleset = variable_get('sms_valid_local_number_ruleset', '64');
  $last_resort_enabled = variable_get('sms_valid_last_resort_enabled', FALSE);
  $last_resort_ruleset = variable_get('sms_valid_last_resort_ruleset', NULL);

  // Check if we should use a specific ruleset prefix
  if (array_key_exists('prefix', $options) && $options['prefix'] >= 0) {
    $specific_prefix = $options['prefix'];
  }
  else {
    $specific_prefix = NULL;
  }

  // Check for zero-length value
  if (!strlen($number)) {
    $result['log'][] = t('You must enter a phone number.');
    return $result;
  }

  // Remove all whitespace
  $number = preg_replace('/[^\\d]/', '', $number);

  // Check if we should use a specific ruleset
  if ($specific_prefix) {
    $prefix = $specific_prefix;
    $ruleset = sms_valid_get_ruleset($prefix);

    // Strip ruleset prefix (if exist) and leading zeros from the number
    $num = preg_replace("/^{$prefix}/", '', $number);
    $num = ltrim($num, '0');
  }
  elseif ($use_global_ruleset) {
    $result['log'][] = 'Using the global prefix validation ruleset.';
    $prefix = $global_ruleset;
    $ruleset = sms_valid_get_ruleset($prefix);
    $num = $number;
  }
  elseif (sms_valid_is_local_number($number)) {
    $prefix = $local_number_ruleset;
    $ruleset = sms_valid_get_ruleset($prefix);
    $result['log'][] = 'Identified local number. Using ruleset prefix ' . $prefix;

    // Strip the local prefix from number
    $num = preg_replace("/^{$local_number_prefix}/", '', $number);
  }
  else {
    $ruleset = sms_valid_get_ruleset_for_number($number);
    if ($ruleset) {
      $result['log'][] = 'Identified ruleset prefix ' . $prefix;
      $prefix = $ruleset['prefix'];
    }
    else {

      // Could not identify ruleset prefix
      $result['log'][] = 'Could NOT identify the ruleset prefix for number ' . $number;
      if ($last_resort_enabled && $last_resort_ruleset) {

        // We have a last resort to use
        $result['log'][] = 'Using last resort ruleset prefix ' . $last_resort_ruleset;
        $prefix = $last_resort_ruleset;
        $ruleset = sms_valid_get_ruleset($prefix);
      }
      else {

        // No last resort. Fail hard.
        $result['log'][] = 'No matching rulesets and no last resort ruleset configured.';
        $result['log'][] = 'Cannot validate this number. Denied by default.';
        return $result;
      }
    }

    // Strip the ruleset prefix from the number
    $num = preg_replace("/^{$prefix}/", '', $number);
  }

  // Get the rules for this ruleset
  $rules = $ruleset['rules'];

  // Sort the rules by prefix (key) in reverse order (largest to smallest)
  krsort($rules);

  // Check whether this ruleset is enabled for the direction of communication
  if (!sms_valid_ruleset_is_enabled($prefix, $dir)) {
    $result['log'][] = "Number prefix {$prefix} does not allow messages in this direction.";
    $result['pass'] = FALSE;
    return $result;
  }

  // Test the number against each rule prefix until we get a match
  if (!empty($rules)) {
    foreach ($rules as $rule_prefix => $rule) {
      $result['log'][] = 'Trying rule with prefix ' . $rule_prefix . ' on number ' . $num;
      if (preg_match("/^{$rule_prefix}/", $num)) {
        if ($rule['allow']) {

          // Set the full validated number and return
          $number = $prefix . $num;
          $result['log'][] = "Explicit allow for prefix {$prefix} {$rule_prefix}";
          $result['pass'] = TRUE;
          return $result;
        }
        else {
          $result['log'][] = "Explicit deny for prefix {$prefix} {$rule_prefix}";
          $result['pass'] = FALSE;
          return $result;
        }
      }
    }
  }

  # No matching rules. Default deny.
  $result['log'][] = "Cannot validate this number. Denied by default.";
  return $result;
}