(function(define) {
    'use strict';

    define(['backbone', 'js/edxnotes/utils/utils', 'underscore.string'], function(Backbone, Utils, str) {
        var NoteModel = Backbone.Model.extend({
            defaults: {
                id: null,
                created: '',
                updated: '',
                user: '',
                usage_id: '',
                course_id: '',
                text: '',
                quote: '',
                ranges: [],
                tags: [],
                unit: {
                    display_name: '',
                    url: '',
                    location: ''
                },
                section: {
                    display_name: '',
                    location: '',
                    children: []
                },
                chapter: {
                    display_name: '',
                    location: '',
                    index: 0,
                    children: []
                },
                // Flag indicating current state of the note: expanded or collapsed.
                is_expanded: false,
                // Flag indicating whether `More` link should be shown.
                show_link: false
            },

            textSize: 300,

            initialize: function() {
                if (this.get('quote').length > this.textSize) {
                    this.set('show_link', true);
                }
            },

            getQuote: function() {
                var message = this.get('quote');

                if (!this.get('is_expanded') && this.get('show_link')) {
                    message = str.prune(message, this.textSize);
                }

                return message;
            }

        });

        return NoteModel;
    });
}).call(this, define || RequireJS.define);