app_vue2/services/utils/hydraParser.ts

import {AnyJson} from "~/types/types";

export default class HydraParser {
  constructor() {
  }

  parse(response: AnyJson): AnyJson {
    if (response['hydra:member']) {
      response.totalCount = response['hydra:totalItems'];
      return this.parseCollection(response);
    } else {
      return this.parseItem(response);
    }
  }

  populateId(data: AnyJson) {
    if (data['@id'] && data['@id'] instanceof String) {
      var iriParts = data['@id'].split('/');
      data.id = iriParts[iriParts.length - 1];
    }
  }

  populateAllData(data: AnyJson):void {
    this.populateId(data);
    for (const key in data) {
      const value = data[key];
      if (value instanceof Object) {
        this.populateAllData(value);
      }
    }
  }

  parseItem(data: AnyJson): AnyJson {
    this.populateId(data);

    if (data['hydra:previous']) {
      let iriParts = data['hydra:previous'].split('/');
      data.previous = iriParts[iriParts.length - 1];
    }
    if (data['hydra:next']) {
      let iriParts = data['hydra:next'].split('/');
      data.next = iriParts[iriParts.length - 1];
    }
    if (data['hydra:totalItems']) {
      data.totalItems = data['hydra:totalItems'];
    }
    if (data['hydra:itemPosition']) {
      data.itemPosition = data['hydra:itemPosition'];
    }
    return data;
  }

  parseCollection(data: AnyJson): AnyJson {
    let collectionResponse = data['hydra:member'];
    collectionResponse.metadata = {};
    collectionResponse.order = {};
    collectionResponse.search = {};

    // Put metadata in a property of the collection
    for (const key in data) {
      const value = data[key];
      if ('hydra:member' !== key) {
        collectionResponse.metadata[key] = value;
      }
    }

    // Populate href property for all elements of the collection
    for (const key in collectionResponse) {
      const value = collectionResponse[key];
      this.populateAllData(value);
    }

    if ('undefined' !== typeof (data['hydra:search'])) {
      let collectionSearch = data['hydra:search']['hydra:mapping'];
      for (const key in collectionSearch) {
        const value = collectionSearch[key];
        if (value['variable'].indexOf("filter[order]") === 0) {
          collectionResponse.order[value['property']] = value;
        } else if (value['variable'].indexOf("filter[where]") === 0) {
          collectionResponse.search[value['property']] = value;
        }
      }
    }
    return collectionResponse;
  }
}