P2 Privately Published Posts

p2-privately-published-posts.php

<?php
/* Plugin Name: P2 Privately Published Posts
 * Description: Allows you to publish private posts to a P2.
 * Author: Andrew Nacin
 * Author URI: http://andrewnacin.com/
 */

/* WARNING about studying and copying this code:
 * 
 * P2 is not currently an ideal platform for developing extensions. Some of this
 * plugin is hacky and may make kittens and core developers cry. It is not
 * guaranteed to work as-is in a future version of P2. While I'll keep it updated
 * to work, please do your best to avoid these techniques. Do as I say, not as I do.
 *
 * -- Nacin
 */

/**
 * @package P2_Privately_Published_Posts
 */
class P2_Privately_Published_Posts {

	static $instance;

	/**
	 * Constructor. Saves instance and sets up initial hook.
	 */
	function __construct() {
		self::$instance = $this;
		add_action( 'after_setup_theme', array( $this, 'after_setup_theme' ) );
	}

	/**
	 * Sets up initial hooks, if the P2 theme is in play.
	 */
	function after_setup_theme() {
		if ( ! class_exists( 'P2' ) )
			return;
		add_action( 'p2_ajax', array( $this, 'p2_ajax' ) );
		add_action( 'wp_head', array( $this, 'wp_head' ) );
		add_action( 'p2_post_form', array( $this, 'p2_post_form' ) );
		add_action( 'wp_footer', array( $this, 'wp_footer' ) );
		add_action( 'p2_action_links', array( $this, 'p2_action_links' ) );
	}

	/**
	 * Fires on the p2_ajax hook. Calls the method appropriate for the action.
	 */
	function p2_ajax( $action ) {
		if ( method_exists( $this, 'p2_ajax_' . $action ) )
			call_user_func( array( $this, 'p2_ajax_' . $action ) );
	}

	/**
	 * Fires on the new_post action for p2_ajax. Removes any 'private' tag and adds
	 * a filter that will later modify the post status.
	 */
	function p2_ajax_new_post() {
		$tags = $_POST['tags'];
        $tags = is_array( $tags ) ? $tags : explode( ',', trim( $tags, " \n\t\r\0\x0B," ) );
		if ( in_array( 'private', $tags ) ) {
			unset( $tags[ array_search( 'private', $tags ) ] );
			$_POST['tags'] = implode( ',', $tags );
			add_filter( 'wp_insert_post_data', array( $this, 'wp_insert_post_data' ), 10, 2 );
		}
	}

	/**
	 * Fires on the get_latest_posts action for p2_ajax. Adds a hook to pre_get_posts that
	 * addresses an issue in P2_Ajax::get_lastest_posts().
	 */
	function p2_ajax_get_latest_posts() {
		add_action( 'pre_get_posts', array( $this, 'pre_get_posts' ) );
	}


	function wp_insert_post_data( $data, $postarr ) {
		remove_filter( 'wp_insert_post_data', array( $this, 'wp_insert_post_data' ), 10, 2 );
		$data['post_status'] = 'private';
		return $data;
	}

	/**
	 * Works around an issue where post_status=publish is unnecessarily passed to query_posts(),
	 * rather than letting WP_Query decide what the user is allowed to see.
	 */
	function pre_get_posts( $query ) {
		remove_action( 'pre_get_posts', array( $this, 'pre_get_posts' ) );
		unset( $query->query_vars['post_status'] );
	}

	/**
	 * Adds 'Private Post' near the action links.
	 */
	function p2_action_links() {
		global $post;
		if ( 'private' == $post->post_status )
			echo ' | <strong class="p5">' . __( 'Private Post', 'p2-privately-published-posts' ) . '</strong>';
	}

	/**
	 * Drop in some CSS.
	 */
	function wp_head() {
		echo "<style> span.actions { padding-right: 3px; }
li.status-private { background: #FEF0F0; }
#p5-private-wrap { visibility: hidden; }
#p5-private-wrap label { font-size: 1.2em }
strong.p5 { color: #900;  } </style>\n";
	}

	/**
	 * Add checkbox for privately publishing a post.
	 */
	function p2_post_form() {
		echo '<div id="p5-private-wrap"><label for="p5-private"><input type="checkbox" id="p5-private" /> ' . __( 'Privately publish this post', 'p2-privately-published-posts' ) . '</label></div>';
	}

	/**
	 * Drop in some JS.
	 */
	function wp_footer() {
?>
<script>
(function($){
	$(document).ready( function() {
		$('#p5-private-wrap').css('visibility', 'visible');
		$('#p5-private').change( function() {
			var tags, original, tagIt;
			tags = $('#tags').val();
			tags = tags.length ? tags.split(',') : [];
			tags = $.map( tags, function(i) { return $.trim(i); } );
			tagIt = tags.indexOf('<?php echo esc_js( __( 'Tag it', 'p2' ) ); ?>');
			if ( -1 !== tagIt )
				tags.splice( tagIt, 1 );
			original = tags.slice();
			if ( this.checked && -1 === $.inArray( 'private', tags ) ) {
				tags.push('private');
			} else if ( ! this.checked && -1 !== $.inArray( 'private', tags ) ) {
				tags.splice( tags.indexOf('private'), 1 );
			}
			if ( original !== tags )
				$('#tags').val( tags.join(', ') );
		});
		$('#tags').change( function() {
			var tags = $(this).val().split(',');
			tags = $.map( tags, function(i) { return $.trim(i); } );
			$('#p5-private').prop('checked', -1 !== tags.indexOf('private'));
		});
	});
})(jQuery);
</script>
<?php
	}

}
new P2_Privately_Published_Posts;

why not release this to the WP.org plugin repository?

Probably will at some point. Though, of the three plugins, this one employs the worst hack by far.