oneOf.js

'use strict';
module.exports = function generate_oneOf(it, $keyword, $ruleType) {
  var out = ' ';
  var $lvl = it.level;
  var $dataLvl = it.dataLevel;
  var $schema = it.schema[$keyword];
  var $schemaPath = it.schemaPath + it.util.getProperty($keyword);
  var $errSchemaPath = it.errSchemaPath + '/' + $keyword;
  var $breakOnError = !it.opts.allErrors;
  var $data = 'data' + ($dataLvl || '');
  var $valid = 'valid' + $lvl;
  var $errs = 'errs__' + $lvl;
  var $it = it.util.copy(it);
  var $closingBraces = '';
  $it.level++;
  var $nextValid = 'valid' + $it.level;
  var $currentBaseId = $it.baseId,
    $prevValid = 'prevValid' + $lvl,
    $passingSchemas = 'passingSchemas' + $lvl;
  out += 'var ' + ($errs) + ' = errors , ' + ($prevValid) + ' = false , ' + ($valid) + ' = false , ' + ($passingSchemas) + ' = null; ';
  var $wasComposite = it.compositeRule;
  it.compositeRule = $it.compositeRule = true;
  var arr1 = $schema;
  if (arr1) {
    var $sch, $i = -1,
      l1 = arr1.length - 1;
    while ($i < l1) {
      $sch = arr1[$i += 1];
      if ((it.opts.strictKeywords ? (typeof $sch == 'object' && Object.keys($sch).length > 0) || $sch === false : it.util.schemaHasRules($sch, it.RULES.all))) {
        $it.schema = $sch;
        $it.schemaPath = $schemaPath + '[' + $i + ']';
        $it.errSchemaPath = $errSchemaPath + '/' + $i;
        out += '  ' + (it.validate($it)) + ' ';
        $it.baseId = $currentBaseId;
      } else {
        out += ' var ' + ($nextValid) + ' = true; ';
      }
      if ($i) {
        out += ' if (' + ($nextValid) + ' && ' + ($prevValid) + ') { ' + ($valid) + ' = false; ' + ($passingSchemas) + ' = [' + ($passingSchemas) + ', ' + ($i) + ']; } else { ';
        $closingBraces += '}';
      }
      out += ' if (' + ($nextValid) + ') { ' + ($valid) + ' = ' + ($prevValid) + ' = true; ' + ($passingSchemas) + ' = ' + ($i) + '; }';
    }
  }
  it.compositeRule = $it.compositeRule = $wasComposite;
  out += '' + ($closingBraces) + 'if (!' + ($valid) + ') {   var err =   '; /* istanbul ignore else */
  if (it.createErrors !== false) {
    out += ' { keyword: \'' + ('oneOf') + '\' , dataPath: (dataPath || \'\') + ' + (it.errorPath) + ' , schemaPath: ' + (it.util.toQuotedString($errSchemaPath)) + ' , params: { passingSchemas: ' + ($passingSchemas) + ' } ';
    if (it.opts.messages !== false) {
      out += ' , message: \'should match exactly one schema in oneOf\' ';
    }
    if (it.opts.verbose) {
      out += ' , schema: validate.schema' + ($schemaPath) + ' , parentSchema: validate.schema' + (it.schemaPath) + ' , data: ' + ($data) + ' ';
    }
    out += ' } ';
  } else {
    out += ' {} ';
  }
  out += ';  if (vErrors === null) vErrors = [err]; else vErrors.push(err); errors++; ';
  if (!it.compositeRule && $breakOnError) {
    /* istanbul ignore if */
    if (it.async) {
      out += ' throw new ValidationError(vErrors); ';
    } else {
      out += ' validate.errors = vErrors; return false; ';
    }
  }
  out += '} else {  errors = ' + ($errs) + '; if (vErrors !== null) { if (' + ($errs) + ') vErrors.length = ' + ($errs) + '; else vErrors = null; }';
  if (it.opts.allErrors) {
    out += ' } ';
  }
  return out;
}