<?php

/**

 * WordPress Plugin Install Administration API

 *

 * @package WordPress

 * @subpackage Administration

 */

/**

 * Retrieve plugin installer pages from WordPress Plugins API.

 *

 * It is possible for a plugin to override the Plugin API result with three

 * filters. Assume this is for plugins, which can extend on the Plugin Info to

 * offer more choices. This is very powerful and must be used with care, when

 * overridding the filters.

 *

 * The first filter, 'plugins_api_args', is for the args and gives the action as

 * the second parameter. The hook for 'plugins_api_args' must ensure that an

 * object is returned.

 *

 * The second filter, 'plugins_api', is the result that would be returned.

 *

 * @since 2.7.0

 *

 * @param string $action

 * @param array|object $args Optional. Arguments to serialize for the Plugin Info API.

 * @return mixed

 */

function plugins_api($action, $args = null) {

	if( is_array($args) )

		$args = (object)$args;

	if ( !isset($args->per_page) )

		$args->per_page = 24;

	$args = apply_filters('plugins_api_args', $args, $action); //NOTE: Ensure that an object is returned via this filter.

	$res = apply_filters('plugins_api', false, $action, $args); //NOTE: Allows a plugin to completely override the builtin WordPress.org API.

	if ( ! $res ) {

		$request = wp_remote_post('http://api.wordpress.org/plugins/info/1.0/', array( 'body' => array('action' => $action, 'request' => serialize($args))) );

		if ( is_wp_error($request) ) {

			$res = new WP_Error('plugins_api_failed', __('An Unexpected HTTP Error occurred during the API request.</p> <p><a href="?" onclick="document.location.reload(); return false;">Try again</a>'), $request->get_error_message() );

		} else {

			$res = unserialize($request['body']);

			if ( ! $res )

				$res = new WP_Error('plugins_api_failed', __('An unknown error occurred'), $request['body']);

		}

	} elseif ( !is_wp_error($res) ) {

		$res->external = true;

	}

	return apply_filters('plugins_api_result', $res, $action, $args);

}

/**

 * Retrieve popular WordPress plugin tags.

 *

 * @since 2.7.0

 *

 * @param array $args

 * @return array

 */

function install_popular_tags( $args = array() ) {

	if ( ! ($cache = wp_cache_get('popular_tags', 'api')) && ! ($cache = get_option('wporg_popular_tags')) )

		add_option('wporg_popular_tags', array(), '', 'no'); ///No autoload.

	if ( $cache && $cache->timeout + 3 * 60 * 60 > time() )

		return $cache->cached;

	$tags = plugins_api('hot_tags', $args);

	if ( is_wp_error($tags) )

		return $tags;

	$cache = (object) array('timeout' => time(), 'cached' => $tags);

	update_option('wporg_popular_tags', $cache);

	wp_cache_set('popular_tags', $cache, 'api');

	return $tags;

}

add_action('install_plugins_search', 'install_search', 10, 1);

/**

 * Display search results and display as tag cloud.

 *

 * @since 2.7.0

 *

 * @param string $page

 */

function install_search($page) {

	$type = isset($_REQUEST['type']) ? stripslashes( $_REQUEST['type'] ) : '';

	$term = isset($_REQUEST['s']) ? stripslashes( $_REQUEST['s'] ) : '';

	$args = array();

	switch( $type ){

		case 'tag':

			$args['tag'] = sanitize_title_with_dashes($term);

			break;

		case 'term':

			$args['search'] = $term;

			break;

		case 'author':

			$args['author'] = $term;

			break;

	}

	$args['page'] = $page;

	$api = plugins_api('query_plugins', $args);

	if ( is_wp_error($api) )

		wp_die($api);

	add_action('install_plugins_table_header', 'install_search_form');

	display_plugins_table($api->plugins, $api->info['page'], $api->info['pages']);

	return;

}

add_action('install_plugins_dashboard', 'install_dashboard');

function install_dashboard() {

	?>

	<p><?php _e('Plugins extend and expand the functionality of WordPress. You may automatically install plugins from the <a href="http://wordpress.org/extend/plugins/">WordPress Plugin Directory</a> or upload a plugin in .zip format via this page.') ?></p>

	<h4><?php _e('Search') ?></h4>

	<p class="install-help"><?php _e('Search for plugins by keyword, author, or tag.') ?></p>

	<?php install_search_form(); ?>

	<h4><?php _e('Popular tags') ?></h4>

	<p class="install-help"><?php _e('You may also browse based on the most popular tags in the Plugin Directory:') ?></p>

	<?php

	$api_tags = install_popular_tags();

	//Set up the tags in a way which can be interprated by wp_generate_tag_cloud()

	$tags = array();

	foreach ( (array)$api_tags as $tag )

		$tags[ $tag['name'] ] = (object) array(

								'link' => esc_url( admin_url('plugin-install.php?tab=search&type=tag&s=' . urlencode($tag['name'])) ),

								'name' => $tag['name'],

								'id' => sanitize_title_with_dashes($tag['name']),

								'count' => $tag['count'] );

	echo '<p class="popular-tags">';

	echo wp_generate_tag_cloud($tags, array( 'single_text' => __('%d plugin'), 'multiple_text' => __('%d plugins') ) );

	echo '</p><br class="clear" />';

}

/**

 * Display search form for searching plugins.

 *

 * @since 2.7.0

 */

function install_search_form(){

	$type = isset($_REQUEST['type']) ? stripslashes( $_REQUEST['type'] ) : '';

	$term = isset($_REQUEST['s']) ? stripslashes( $_REQUEST['s'] ) : '';

	?><form id="search-plugins" method="post" action="<?php echo admin_url('plugin-install.php?tab=search'); ?>">

		<select name="type" id="typeselector">

			<option value="term"<?php selected('term', $type) ?>><?php _e('Term'); ?></option>

			<option value="author"<?php selected('author', $type) ?>><?php _e('Author'); ?></option>

			<option value="tag"<?php selected('tag', $type) ?>><?php echo _x('Tag', 'Plugin Installer'); ?></option>

		</select>

		<input type="text" name="s" value="<?php echo esc_attr($term) ?>" />

		<label class="screen-reader-text" for="plugin-search-input"><?php _e('Search Plugins'); ?></label>

		<input type="submit" id="plugin-search-input" name="search" value="<?php esc_attr_e('Search Plugins'); ?>" class="button" />

	</form><?php

}

add_action('install_plugins_featured', 'install_featured', 10, 1);

/**

 * Display featured plugins.

 *

 * @since 2.7.0

 *

 * @param string $page

 */

function install_featured($page = 1) {

	$args = array('browse' => 'featured', 'page' => $page);

	$api = plugins_api('query_plugins', $args);

	if ( is_wp_error($api) )

		wp_die($api);

	display_plugins_table($api->plugins, $api->info['page'], $api->info['pages']);

}

add_action('install_plugins_popular', 'install_popular', 10, 1);

/**

 * Display popular plugins.

 *

 * @since 2.7.0

 *

 * @param string $page

 */

function install_popular($page = 1) {

	$args = array('browse' => 'popular', 'page' => $page);

	$api = plugins_api('query_plugins', $args);

	display_plugins_table($api->plugins, $api->info['page'], $api->info['pages']);

}

add_action('install_plugins_upload', 'install_plugins_upload', 10, 1);

/**

 * Upload from zip

 * @since 2.8.0

 *

 * @param string $page

 */

function install_plugins_upload( $page = 1 ) {

?>

	<h4><?php _e('Install a plugin in .zip format') ?></h4>

	<p class="install-help"><?php _e('If you have a plugin in a .zip format, You may install it by uploading it here.') ?></p>

	<form method="post" enctype="multipart/form-data" action="<?php echo admin_url('update.php?action=upload-plugin') ?>">

		<?php wp_nonce_field( 'plugin-upload') ?>

		<label class="screen-reader-text" for="pluginzip"><?php _e('Plugin zip file'); ?></label>

		<input type="file" id="pluginzip" name="pluginzip" />

		<input type="submit" class="button" value="<?php esc_attr_e('Install Now') ?>" />

	</form>

<?php

}

add_action('install_plugins_new', 'install_new', 10, 1);

/**

 * Display new plugins.

 *

 * @since 2.7.0

 *

 * @param string $page

 */

function install_new($page = 1) {

	$args = array('browse' => 'new', 'page' => $page);

	$api = plugins_api('query_plugins', $args);

	if ( is_wp_error($api) )

		wp_die($api);

	display_plugins_table($api->plugins, $api->info['page'], $api->info['pages']);

}

add_action('install_plugins_updated', 'install_updated', 10, 1);

/**

 * Display recently updated plugins.

 *

 * @since 2.7.0

 *

 * @param string $page

 */

function install_updated($page = 1) {

	$args = array('browse' => 'updated', 'page' => $page);

	$api = plugins_api('query_plugins', $args);

	display_plugins_table($api->plugins, $api->info['page'], $api->info['pages']);

}

/**

 * Display plugin content based on plugin list.

 *

 * @since 2.7.0

 *

 * @param array $plugins List of plugins.

 * @param string $page

 * @param int $totalpages Number of pages.

 */

function display_plugins_table($plugins, $page = 1, $totalpages = 1){

	$type = isset($_REQUEST['type']) ? stripslashes( $_REQUEST['type'] ) : '';

	$term = isset($_REQUEST['s']) ? stripslashes( $_REQUEST['s'] ) : '';

	$plugins_allowedtags = array('a' => array('href' => array(),'title' => array(), 'target' => array()),

								'abbr' => array('title' => array()),'acronym' => array('title' => array()),

								'code' => array(), 'pre' => array(), 'em' => array(),'strong' => array(),

								'ul' => array(), 'ol' => array(), 'li' => array(), 'p' => array(), 'br' => array());

?>

	<div class="tablenav">

		<div class="alignleft actions">

		<?php do_action('install_plugins_table_header'); ?>

		</div>

		<?php

			$url = esc_url($_SERVER['REQUEST_URI']);

			if ( ! empty($term) )

				$url = add_query_arg('s', $term, $url);

			if ( ! empty($type) )

				$url = add_query_arg('type', $type, $url);

			$page_links = paginate_links( array(

				'base' => add_query_arg('paged', '%#%', $url),

				'format' => '',

				'prev_text' => __('«'),

				'next_text' => __('»'),

				'total' => $totalpages,

				'current' => $page

			));

			if ( $page_links )

				echo "\t\t<div class='tablenav-pages'>$page_links</div>";

?>

		<br class="clear" />

	</div>

	<table class="widefat" id="install-plugins" cellspacing="0">

		<thead>

			<tr>

				<th scope="col" class="name"><?php _e('Name'); ?></th>

				<th scope="col" class="num"><?php _e('Version'); ?></th>

				<th scope="col" class="num"><?php _e('Rating'); ?></th>

				<th scope="col" class="desc"><?php _e('Description'); ?></th>

				<th scope="col" class="action-links"><?php _e('Actions'); ?></th>

			</tr>

		</thead>

		<tfoot>

			<tr>

				<th scope="col" class="name"><?php _e('Name'); ?></th>

				<th scope="col" class="num"><?php _e('Version'); ?></th>

				<th scope="col" class="num"><?php _e('Rating'); ?></th>

				<th scope="col" class="desc"><?php _e('Description'); ?></th>

				<th scope="col" class="action-links"><?php _e('Actions'); ?></th>

			</tr>

		</tfoot>

		<tbody class="plugins">

		<?php

			if( empty($plugins) )

				echo '<tr><td colspan="5">', __('No plugins match your request.'), '</td></tr>';

			foreach( (array) $plugins as $plugin ){

				if ( is_object($plugin) )

					$plugin = (array) $plugin;

				$title = wp_kses($plugin['name'], $plugins_allowedtags);

				//Limit description to 400char, and remove any HTML.

				$description = strip_tags($plugin['description']);

				if ( strlen($description) > 400 )

					$description = mb_substr($description, 0, 400) . '…';

				//remove any trailing entities

				$description = preg_replace('/&[^;\s]{0,6}$/', '', $description);

				//strip leading/trailing & multiple consecutive lines

				$description = trim($description);

				$description = preg_replace("|(\r?\n)+|", "\n", $description);

				//\n => <br>

				$description = nl2br($description);

				$version = wp_kses($plugin['version'], $plugins_allowedtags);

				$name = strip_tags($title . ' ' . $version);

				$author = $plugin['author'];

				if( ! empty($plugin['author']) )

					$author = ' <cite>' . sprintf( __('By %s'), $author ) . '.</cite>';

				$author = wp_kses($author, $plugins_allowedtags);

				if( isset($plugin['homepage']) )

					$title = '<a target="_blank" href="' . esc_attr($plugin['homepage']) . '">' . $title . '</a>';

				$action_links = array();

				$action_links[] = '<a href="' . admin_url('plugin-install.php?tab=plugin-information&amp;plugin=' . $plugin['slug'] .

									'&TB_iframe=true&width=600&height=550') . '" class="thickbox onclick" title="' .

									esc_attr($name) . '">' . __('Install') . '</a>';

				$action_links = apply_filters('plugin_install_action_links', $action_links, $plugin);

			?>

			<tr>

				<td class="name"><?php echo $title; ?></td>

				<td class="vers"><?php echo $version; ?></td>

				<td class="vers">

					<div class="star-holder" title="<?php printf(_n('(based on %s rating)', '(based on %s ratings)', $plugin['num_ratings']), number_format_i18n($plugin['num_ratings'])) ?>">

						<div class="star star-rating" style="width: <?php echo esc_attr($plugin['rating']) ?>px"></div>

						<div class="star star5"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('5 stars') ?>" /></div>

						<div class="star star4"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('4 stars') ?>" /></div>

						<div class="star star3"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('3 stars') ?>" /></div>

						<div class="star star2"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('2 stars') ?>" /></div>

						<div class="star star1"><img src="<?php echo admin_url('images/star.gif'); ?>" alt="<?php _e('1 star') ?>" /></div>

					</div>

				</td>

				<td class="desc"><?php echo $description, $author; ?></td>

				<td class="action-links"><?php if ( !empty($action_links) )	echo implode(' | ', $action_links); ?></td>

			</tr>

			<?php

			}