wechat_mall_applet/utils/jsonapi-datastore/dist/jsonapi-datastore.js

/**
 * @class JsonApiDataStoreModel
 */
"use strict";

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var JsonApiDataStoreModel = (function () {
  /**
   * @method constructor
   * @param {string} type The type of the model.
   * @param {string} id The id of the model.
   */

  function JsonApiDataStoreModel(type, id) {
    _classCallCheck(this, JsonApiDataStoreModel);

    this.id = id;
    this._type = type;
    this._attributes = [];
    this._relationships = [];
  }

  /**
   * @class JsonApiDataStore
   */

  /**
   * Serialize a model.
   * @method serialize
   * @param {object} opts The options for serialization.  Available properties:
   *
   *  - `{array=}` `attributes` The list of attributes to be serialized (default: all attributes).
   *  - `{array=}` `relationships` The list of relationships to be serialized (default: all relationships).
   * @return {object} JSONAPI-compliant object
   */

  _createClass(JsonApiDataStoreModel, [{
    key: "serialize",
    value: function serialize(opts) {
      var self = this,
          res = { data: { type: this._type } },
          key;

      opts = opts || {};
      opts.attributes = opts.attributes || this._attributes;
      opts.relationships = opts.relationships || this._relationships;

      if (this.id !== undefined) res.data.id = this.id;
      if (opts.attributes.length !== 0) res.data.attributes = {};
      if (opts.relationships.length !== 0) res.data.relationships = {};

      opts.attributes.forEach(function (key) {
        res.data.attributes[key] = self[key];
      });

      opts.relationships.forEach(function (key) {
        function relationshipIdentifier(model) {
          return { type: model._type, id: model.id };
        }
        if (!self[key]) {
          res.data.relationships[key] = { data: null };
        } else if (self[key].constructor === Array) {
          res.data.relationships[key] = {
            data: self[key].map(relationshipIdentifier)
          };
        } else {
          res.data.relationships[key] = {
            data: relationshipIdentifier(self[key])
          };
        }
      });

      return res;
    }

    /**
     * Set/add an attribute to a model.
     * @method setAttribute
     * @param {string} attrName The name of the attribute.
     * @param {object} value The value of the attribute.
     */
  }, {
    key: "setAttribute",
    value: function setAttribute(attrName, value) {
      if (this[attrName] === undefined) this._attributes.push(attrName);
      this[attrName] = value;
    }

    /**
     * Set/add a relationships to a model.
     * @method setRelationship
     * @param {string} relName The name of the relationship.
     * @param {object} models The linked model(s).
     */
  }, {
    key: "setRelationship",
    value: function setRelationship(relName, models) {
      if (this[relName] === undefined) this._relationships.push(relName);
      this[relName] = models;
    }
  }]);

  return JsonApiDataStoreModel;
})();

var JsonApiDataStore = (function () {
  /**
   * @method constructor
   */

  function JsonApiDataStore() {
    _classCallCheck(this, JsonApiDataStore);

    this.graph = {};
  }

  /**
   * Remove a model from the store.
   * @method destroy
   * @param {object} model The model to destroy.
   */

  _createClass(JsonApiDataStore, [{
    key: "destroy",
    value: function destroy(model) {
      delete this.graph[model._type][model.id];
    }

    /**
     * Retrieve a model by type and id. Constant-time lookup.
     * @method find
     * @param {string} type The type of the model.
     * @param {string} id The id of the model.
     * @return {object} The corresponding model if present, and null otherwise.
     */
  }, {
    key: "find",
    value: function find(type, id) {
      if (!this.graph[type] || !this.graph[type][id]) return null;
      return this.graph[type][id];
    }

    /**
     * Retrieve all models by type.
     * @method findAll
     * @param {string} type The type of the model.
     * @return {object} Array of the corresponding model if present, and empty array otherwise.
     */
  }, {
    key: "findAll",
    value: function findAll(type) {
      var self = this;

      if (!this.graph[type]) return [];
      return Object.keys(self.graph[type]).map(function (v) {
        return self.graph[type][v];
      });
    }

    /**
     * Empty the store.
     * @method reset
     */
  }, {
    key: "reset",
    value: function reset() {
      this.graph = {};
    }
  }, {
    key: "initModel",
    value: function initModel(type, id) {
      this.graph[type] = this.graph[type] || {};
      this.graph[type][id] = this.graph[type][id] || new JsonApiDataStoreModel(type, id);

      return this.graph[type][id];
    }
  }, {
    key: "syncRecord",
    value: function syncRecord(rec) {
      var self = this,
          model = this.initModel(rec.type, rec.id),
          key;

      function findOrInit(resource) {
        if (!self.find(resource.type, resource.id)) {
          var placeHolderModel = self.initModel(resource.type, resource.id);
          placeHolderModel._placeHolder = true;
        }
        return self.graph[resource.type][resource.id];
      }

      delete model._placeHolder;

      for (key in rec.attributes) {
        model._attributes.push(key);
        model[key] = rec.attributes[key];
      }

      if (rec.relationships) {
        for (key in rec.relationships) {
          var rel = rec.relationships[key];
          if (rel.data !== undefined) {
            model._relationships.push(key);
            if (rel.data === null) {
              model[key] = null;
            } else if (rel.data.constructor === Array) {
              model[key] = rel.data.map(findOrInit);
            } else {
              model[key] = findOrInit(rel.data);
            }
          }
          if (rel.links) {
            console.log("Warning: Links not implemented yet.");
          }
        }
      }

      return model;
    }

    /**
     * Sync a JSONAPI-compliant payload with the store and return any metadata included in the payload
     * @method syncWithMeta
     * @param {object} data The JSONAPI payload
     * @return {object} The model/array of models corresponding to the payload's primary resource(s) and any metadata.
     */
  }, {
    key: "syncWithMeta",
    value: function syncWithMeta(payload) {
      var primary = payload.data,
          syncRecord = this.syncRecord.bind(this);
      if (!primary) return [];
      if (payload.included) payload.included.map(syncRecord);
      return {
        data: primary.constructor === Array ? primary.map(syncRecord) : syncRecord(primary),
        meta: "meta" in payload ? payload.meta : null
      };
    }

    /**
     * Sync a JSONAPI-compliant payload with the store.
     * @method sync
     * @param {object} data The JSONAPI payload
     * @return {object} The model/array of models corresponding to the payload's primary resource(s).
     */
  }, {
    key: "sync",
    value: function sync(payload) {
      return this.syncWithMeta(payload).data;
    }
  }]);

  return JsonApiDataStore;
})();

if ('undefined' !== typeof module) {
  module.exports = {
    JsonApiDataStore: JsonApiDataStore,
    JsonApiDataStoreModel: JsonApiDataStoreModel
  };
}