@openactive/rpde-validator/src/rules/last-page/no-last-page-items-rule.js

A library to walk and validate an RPDE feed

const {
  ValidationErrorCategory,
  ValidationErrorSeverity,
} = require('@openactive/data-model-validator');
const RpdeRule = require('../../rpde-rule');
const RpdeErrorType = require('../../errors/rpde-error-type');

const NoLastPageItemsRule = class extends RpdeRule {
  constructor() {
    super();
    this.deletedItemsFound = false;
    this.meta = {
      name: 'NoLastPageItemsRule',
      description: 'Validates that the last page of the feed contains no items',
      tests: {
        default: {
          description: 'Raises a failure if items are found on the last page of the feed',
          message: 'The last page must not contain any items. See the [last page definition](https://www.openactive.io/realtime-paged-data-exchange/#last-page-definition) for more details.',
          category: ValidationErrorCategory.CONFORMANCE,
          severity: ValidationErrorSeverity.FAILURE,
          type: RpdeErrorType.LAST_PAGE_NO_ITEMS,
        },
      },
    };
  }

  validate(node) {
    if (
      typeof node.data !== 'object'
      || typeof node.data.items === 'undefined'
      || !(node.data.items instanceof Array)
      || node.data.items.length > 0
    ) {
      node.log.addPageError(
        node.url,
        this.createError(
          'default',
          {
            value: node.data,
            url: node.url,
          },
        ),
      );
    }
  }
};

module.exports = NoLastPageItemsRule;