forked from GNUsocial/gnu-social
250 lines
8.4 KiB
PHP
250 lines
8.4 KiB
PHP
<?php
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* Plugin to add Disqus commenting to notice pages
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Plugin
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* @package StatusNet
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* @author Zach Copley <zach@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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exit(1);
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}
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/**
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*
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* This plugin adds Disqus commenting to your notices. Enabling this
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* plugin will make each notice page display the Disqus widget, and
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* notice lists will display the number of commments each notice has.
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*
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* To use this plugin, you need to first register your site with Disqus
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* and get a Discus 'shortname' for it.
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*
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* http://disqus.com
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*
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* To enable the plugin, put the following in you config.php:
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*
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* addPlugin(
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* 'Disqus', array(
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* 'shortname' => 'YOURSHORTNAME',
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* 'divStyle' => 'width:675px; padding-top:10px; position:relative; float:left;'
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* )
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* );
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*
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* If you only want to allow commenting on a specific user's notices or
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* a specific set of users' notices initialize the plugin with the "restricted"
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* parameter and grant the "richedit" role to those users. E.g.:
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*
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* addPlugin(
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* 'Disqus', array(
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* 'shortname' => 'YOURSHORTNAME',
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* 'divStyle' => 'width:675px; padding-top:10px; position:relative; float:left;',
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* 'restricted' => true
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* )
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* );
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*
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* $ php userrole.php -s#### -nusername -rrichedit
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*
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*
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* NOTE: the 'divStyle' in an optional parameter that passes in some
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* inline CSS when creating the Disqus widget. It's a shortcut to make
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* the widget look OK with the default StatusNet theme. If you leave
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* it out you'll have to edit your theme CSS files to make the widget
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* look good. You can also control the way the widget looks by
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* adding style rules to your theme.
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*
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* See: http://help.disqus.com/entries/100878-css-customization
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*
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*
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* @category Plugin
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* @package StatusNet
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* @author Zach Copley <zach@status.net>
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*
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* @see Event
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*/
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class DisqusPlugin extends Plugin
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{
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public $shortname; // Required 'shortname' for actually triggering Disqus
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public $divStyle; // Optional CSS chunk for the main <div>
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// By default, Disqus commenting will be available to all users.
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// With restricted on, only users who have been granted the
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// "richedit" role get it.
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public $restricted = false;
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/**
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* Add a Disqus commenting section to the end of an individual
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* notice page's content block
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*
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* @param Action $action The current action
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*/
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function onEndShowContentBlock($action)
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{
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if (get_class($action) == 'ShownoticeAction') {
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$profile = Profile::staticGet('id', $action->notice->profile_id);
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if ($this->isAllowedRichEdit($profile)) {
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$attrs = array();
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$attrs['id'] = 'disqus_thread';
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if ($this->divStyle) {
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$attrs['style'] = $this->divStyle;
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}
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$action->element('div', $attrs, null);
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$script = <<<ENDOFSCRIPT
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var disqus_identifier = %d;
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(function() {
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var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
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dsq.src = 'http://%s.disqus.com/embed.js';
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(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
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})();
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ENDOFSCRIPT;
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$action->inlineScript(sprintf($script, $action->notice->id, $this->shortname));
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$attrs = array();
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$attrs['id'] = 'disqus_thread_footer';
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if ($this->divStyle) {
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$attrs['style'] = $this->divStyle;
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}
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$action->elementStart('div', $attrs);
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$action->elementStart('noscript');
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// TRANS: User notification that JavaScript is required for Disqus comment display.
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$noScriptMsg = sprintf(_m("Please enable JavaScript to view the [comments powered by Disqus](http://disqus.com/?ref_noscript=%s)."), $this->shortname);
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$output = common_markup_to_html($noScriptMsg);
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$action->raw($output);
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$action->elementEnd('noscript');
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$action->elementStart('a', array('href' => 'http://disqus.com', 'class' => 'dsq-brlink'));
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// TRANS: This message is followed by a Disqus logo. Alt text is "Disqus".
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$action->raw(_m('Comments powered by '));
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$action->element('span', array('class' => 'logo-disqus'), 'Disqus');
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$action->elementEnd('a');
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$action->elementEnd('div');
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}
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}
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}
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/**
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* Add Disqus comment count script to the end of the scripts section
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*
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* @param Action $action the current action
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*
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*/
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function onEndShowScripts($action)
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{
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// fugly
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$script = <<<ENDOFSCRIPT
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var disqus_shortname = '%s';
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(function () {
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var s = document.createElement('script'); s.async = true;
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s.src = 'http://disqus.com/forums/%s/count.js';
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(document.getElementsByTagName('HEAD')[0] || document.getElementsByTagName('BODY')[0]).appendChild(s);
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}());
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ENDOFSCRIPT;
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$action->inlineScript(sprintf($script, $this->shortname, $this->shortname));
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}
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/**
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* Tack on a Disqus comments link to the notice options stanza
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* (the link displays the total number of comments for each notice)
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*
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* @param NoticeListItem $noticeListItem
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*
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*/
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function onEndShowNoticeInfo($noticeListItem)
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{
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// Don't enable commenting for remote notices
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if (empty($noticeListItem->notice->is_local)) {
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return;
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}
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$profile = Profile::staticGet('id', $noticeListItem->notice->profile_id);
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if ($this->isAllowedRichEdit($profile)) {
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$noticeUrl = $noticeListItem->notice->bestUrl();
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$noticeUrl .= '#disqus_thread';
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$noticeListItem->out->element(
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'a',
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array('href' => $noticeUrl, 'class' => 'disqus_count'),
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// TRANS: Plugin supplied feature for Disqus comments to notices.
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_m('Comments')
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);
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}
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}
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/**
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* Does the current user have permission to use the Disqus plugin?
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* Always true unless the plugin's "restricted" setting is on, in which
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* case it's limited to users with the "richedit" role.
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*
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* @fixme make that more sanely configurable :)
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*
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* @param Profile $profile the profile to check
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*
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* @return boolean
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*/
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private function isAllowedRichEdit($profile)
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{
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if ($this->restricted) {
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$user = User::staticGet($profile->id);
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return !empty($user) && $user->hasRole('richedit');
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} else {
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return true;
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}
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}
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/**
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* Plugin details
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*
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* @param &$versions Array of current plugins
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*
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* @return boolean true
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*/
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function onPluginVersion(&$versions)
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{
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$versions[] = array('name' => 'Disqus',
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'version' => STATUSNET_VERSION,
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'author' => 'Zach Copley',
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'homepage' => 'http://status.net/wiki/Plugin:Disqus',
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'rawdescription' =>
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// TRANS: Plugin description.
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_m('Use <a href="http://disqus.com/">Disqus</a>'.
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' to add commenting to notice pages.'));
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return true;
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}
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}
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