changing the js sdk assets class.

Author: hiteshbal91

src/core/modules/assets.js

@@ -0,0 +1,134 @@
+import * as Utils from '../lib/utils';
+import Stack from '../stack';
+import Query from './query';
+
+const _extend = function(type) {
+    return function() {
+        this._query[type] = this._query[type] || {};
+        switch (arguments.length) {
+            case 1:
+                if (Array.isArray(arguments[0]) || typeof arguments[0] === "string") {
+                    let query = this._query[type]['BASE'] || [];
+                    query = query.concat(arguments[0]);
+                    this._query[type]['BASE'] = query;
+                    return this;
+                } else {
+                    console.error("Kindly provide valid parameters");
+                }
+                break;
+            case 2:
+                if (typeof arguments[0] === "string" && (Array.isArray(arguments[1]) || typeof arguments[1] === "string")) {
+                    let query = this._query[type][arguments[0]] || [];
+                    query = query.concat(arguments[1]);
+                    this._query[type][arguments[0]] = query;
+                    return this;
+                } else {
+                    console.error("Kindly provide valid parameters");
+                }
+                break;
+            default:
+                console.error("Kindly provide valid parameters");
+        }
+    };
+};
+/**
+ * @summary Creates an instance of `Assets`.
+ * @description An initializer is responsible for creating Asset object.
+ * @param {String} uid - uid of the asset
+ * @example
+ * let Assets = Contentstack.Stack().Assets('bltsomething123');
+ * @returns {Assets}
+ * @ignore
+ */
+export default class Assets {
+    constructor() {
+        /**
+         * @method only
+         * @description This method is use to show the selected fields of the assets in resultset.
+         * @param {String} [key=BASE] - single field in asset
+         * @param {Array} values - array of fields to be show in resultset
+         * @example
+         * <caption> .only with field uid </caption>
+         * Assets().only('title')
+         * @example
+         * <caption> .only with field uid </caption>
+         * Assets().only('BASE','title')
+         * @example
+         * <caption> .only with field uids(array) </caption>
+         * Assets().only(['title','description'])
+         * @returns {Asset}
+         */
+        this.only = _extend('only');
+        return this;
+    }
+
+    /**
+     * @method Query
+     * @description Query instance to provide support for all search queries.
+     * @example Assets().Query()
+     * @returns {Query}
+     */
+    Query() {
+        let query = new Query();
+        return Utils.merge(query, this);
+    }
+
+    /**
+     * @method addQuery
+     * @description This method is used to add query to Entry object.
+     * @param {String} key - key of the query
+     * @param {String} value - value of the query
+     * @example Assets().addQuery('include_schema',true)
+     * @returns {Entry}
+     */
+    addQuery(key, value) {
+        if (key && value && typeof key === 'string') {
+            this._query[key] = value;
+            return this;
+        } else {
+            console.error("First argument should be a String.");
+        }
+    }
+
+    /**
+     * @method toJSON
+     * @description This method is used to convert the result in to plain javascript object.
+     * @example
+     * assetQuery
+     *      .toJSON()
+     *      .then(function (result) {
+     *          let value = result.get(field_uid)
+     *       },function (error) {
+     *          // error function
+     *      })
+     * @returns {Object}
+     */
+    toJSON() {
+        this.tojson = true;
+        return this;
+    }
+
+
+    /**
+     * @method fetch
+     * @description fetch asset obhect of requested Asset uid of defined query if present.
+     * @example
+     * Stack.Assets('bltsomething123').fetch()
+     */
+    fetch() {
+        if (this.asset_uid) {
+            this.requestParams = {
+                method: 'POST',
+                headers: this.headers,
+                url: this.config.protocol + "://" + this.config.host + ':' + this.config.port + '/' + this.config.version + this.config.urls.assets + this.asset_uid,
+                body: {
+                    _method: 'GET',
+                    query: this._query
+                }
+            }
+            return Utils.sendRequest(this);
+        } else {
+            console.error("Kindly provide an asset uid. e.g. .Assets('bltsomething123')");
+        }
+    }
+}