GeoKnow/Jassa-Core

var Class = require('../../ext/Class');
var ListService = require('./ListService');

var shared = require('../../util/shared');
var Promise = shared.Promise;

/**
 * A list service that transforms the input concept to another
 * which gets passed to the underlying list service
 *
 */
var ListServiceTransformItems = Class.create(ListService, {
    initialize: function(listService, fnTransformItems) {
        this.listService = listService;
        this.fnTransformItems = fnTransformItems;
    },

    fetchItems: function(concept, limit, offset) {

        var self = this;
        var result = this.listService.fetchItems(concept, limit, offset).then(function(items) {
            var r = self.fnTransformItems(items);
            return r;
        });

        return result;
    },

    fetchCount: function(concept, itemLimit, rowLimit) {
        var result = this.listService.fetchCount(concept, itemLimit, rowLimit);
        return result;
    },

});

module.exports = ListServiceTransformItems;