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/**
 * @copyright (c) 2017 Arthur Schiwon <blizzz@arthur-schiwon.de>
 *
 * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 */

(function(OCP) {
	"use strict";

	OCP.Comments = {

		/*
		 * Detects links:
		 * Either the http(s) protocol is given or two strings, basically limited to ascii with the last
		 * 	word being at least one digit long,
		 * followed by at least another character
		 *
		 * The downside: anything not ascii is excluded. Not sure how common it is in areas using different
		 * alphabets… the upside: fake domains with similar looking characters won't be formatted as links
		 */
		urlRegex: /(\b(https?:\/\/|([-A-Z0-9+_])*\.([-A-Z])+)[-A-Z0-9+&@#\/%?=~_|!:,.;()]*[-A-Z0-9+&@#\/%=~_|()])/ig,
		protocolRegex: /^https:\/\//,

		plainToRich: function(content) {
			content = this.formatLinksRich(content);
			return content;
		},

		richToPlain: function(content) {
			content = this.formatLinksPlain(content);
			return content;
		},

		formatLinksRich: function(content) {
			var self = this;
			return content.replace(this.urlRegex, function(url) {
				var hasProtocol = (url.indexOf('https://') !== -1) || (url.indexOf('http://') !== -1);
				if(!hasProtocol) {
					url = 'https://' + url;
				}

				var linkText = url.replace(self.protocolRegex, '');
				return '<a class="external" target="_blank" rel="noopener noreferrer" href="' + url + '">' + linkText + '</a>';
			});
		},

		formatLinksPlain: function(content) {
			var $content = $('<div></div>').html(content);
			$content.find('a').each(function () {
				var $this = $(this);
				$this.html($this.attr('href'));
			});
			return $content.html();
		}

	};
})(OCP);