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