forest-express/dist/deserializers/resource.js

Official package for all Forest Express Lianas

"use strict";

var _ = require('lodash');
var P = require('bluebird');
var logger = require('../services/logger');
var Schemas = require('../generators/schemas');
function ResourceDeserializer(Implementation, model, params, withRelationships, opts) {
  if (!opts) {
    opts = {};
  }
  var schema = Schemas.schemas[Implementation.getModelName(model)];
  function extractAttributes() {
    var attributes = params.data.attributes;
    if (params.data.attributes) {
      attributes[schema.idField] = params.data.attributes[schema.idField] || params.data.id;
    }

    // NOTICE: Look for some Smart Field setters and apply them if any.
    var smartFields = _.filter(schema.fields, function (field) {
      if (field.isVirtual && field.set && field.reference) {
        logger.warn("The \"".concat(field.field, "\" Smart Relationship cannot be updated implementing a \"set\" function."));
      }
      return field.isVirtual && field.set && !field.reference;
    });
    _.each(schema.fields, function (field) {
      if (field.type === 'Point' && params.data.attributes[field.field]) {
        var coordinates = params.data.attributes[field.field].split(',');
        params.data.attributes[field.field] = {
          type: 'Point',
          coordinates: coordinates
        };
      }
    });
    return P.each(smartFields, function (field) {
      // WARNING: The Smart Fields setters may override other changes.
      if (field.field in attributes) {
        return field.set(attributes, attributes[field.field]);
      }
      return null;
    }).then(function () {
      if (opts.omitNullAttributes) {
        attributes = _.pickBy(attributes, function (value) {
          return !_.isNull(value);
        });
      }
      return attributes || {};
    });
  }
  function extractRelationships() {
    return new P(function (resolve) {
      var relationships = {};
      _.each(schema.fields, function (field) {
        if (field.reference && params.data.relationships && params.data.relationships[field.field]) {
          if (params.data.relationships[field.field].data === null) {
            // Remove the relationships
            relationships[field.field] = null;
          } else if (params.data.relationships[field.field].data) {
            // Set the relationship
            if (_.isArray(params.data.relationships[field.field].data)) {
              relationships[field.field] = params.data.relationships[field.field].data.map(function (d) {
                return d.id;
              });
            } else {
              relationships[field.field] = params.data.relationships[field.field].data.id;
            }
          } // Else ignore the relationship
        }
      });

      resolve(relationships);
    });
  }
  this.perform = function () {
    if (withRelationships) {
      return P.all([extractAttributes(), extractRelationships()]).spread(function (attributes, relationships) {
        return _.extend(attributes, relationships);
      });
    }
    return extractAttributes();
  };
}
module.exports = ResourceDeserializer;