// Copyright IBM Corp. 2016. All Rights Reserved.
  // Node module: loopback-datasource-juggler
  // This file is licensed under the MIT License.
  // License text available at https://opensource.org/licenses/MIT
  'use strict';
  
  module.exports = HookMonitor;
  
  function HookMonitor(opts) {
    if (!(this instanceof HookMonitor)) {
      return new HookMonitor();
    }
  
    this.options = opts || {};
    this.names = [];
  };
  
  HookMonitor.prototype.install = function(ObservedModel, hookNames) {
    var monitor = this;
    this.names = [];
    ObservedModel._notify = ObservedModel.notifyObserversOf;
    ObservedModel.notifyObserversOf = function(operation, context, callback) {
      if (!Array.isArray(hookNames) || hookNames.indexOf(operation) !== -1) {
        var item = monitor.options.includeModelName ?
          ObservedModel.modelName + ':' + operation :
          operation;
        monitor.names.push(item);
      }
      this._notify.apply(this, arguments);
    };
  };
  
  HookMonitor.prototype.resetNames = function() {
    this.names = [];
  };