hostabee-mapper-mixin.html

<!--
@license
Copyright (c) 2019 Hostabee SAS.
This program is available under Apache License Version 2.0.
-->

<script>
  /**
   * @namespace Hostabee
   */
  window.Hostabee = window.Hostabee || {};

  /**
   * @mixinFunction
   * @polymer
   * @memberof Hostabee
   */
  Hostabee.MapperMixin = (superClass) => class MapperMixin extends superClass {
    /**
     * Transforms the given entity using the provided mapping. Returns a copy
     * of the comment with properties listed in the mapping values renamed
     * like the keys.
     * 
     * For example, if the mapping is `{prop: 'myProp'}`, the property
     * "myProp" of the given comment will be renamed "prop".
     * 
     * @param {Object} entity The entity to be transformed/converted.
     * @param {Object} mapping The mapping to use for the transformation/conversion.
     * @return a copy of the entity with all properties present in the mapper
     * values renamed like the keys.
     */
    applyMapping(entity, mapping = {}) {
      var obj = Object.assign({}, entity);
      Object.keys(mapping).forEach(key => {
        obj[key] = obj[mapping[key]];
        delete obj[mapping[key]];
      });
      return obj;
    }

    /**
     * Transforms the given entity using the provided mapping. Returns a copy
     * of the comment with properties listed in the mapping values renamed
     * like the keys.
     * 
     * For example, if the mapping is `{prop: 'myProp'}`, the property
     * "prop" of the given comment will be renamed "myProp".
     * 
     * @param {Object} entity The entity to be transformed/converted.
     * @param {Object} mapping The mapping to use for the transformation/conversion.
     * @return a copy of the entity with all properties present in the
     * mapper keys renamed like the values.
     */
    reverseApplyMapping(entity, mapping = {}) {
      var obj = Object.assign({}, entity);
      Object.keys(mapping).forEach(key => {
        obj[mapping[key]] = obj[key];
        delete obj[key];
      });
      return obj;
    }
  };
</script>