Moderation Buddy

moderation-buddy.php

<?php
/*
Plugin Name: Moderation Buddy
Description: A friendly assistent to make sure you don't get behind on your comment moderation tasks.
Version: 0.1
Author: Mark Jaquith
Author URI: http://coveredwebservices.com/
*/

class CWS_Moderation_Buddy_Plugin {
	static $instance;
	private $bar;

	function __construct() {
		self::$instance = $this;
		add_action( 'init', array( $this, 'init' ), 15 );
	}

	function init() {
		if ( isset( $GLOBALS['wp_admin_bar'] ) && is_object( $GLOBALS['wp_admin_bar'] ) ) {
			add_action( 'wp_before_admin_bar_render', array( $this, 'add_css' ) );
			add_action( 'admin_bar_menu', array( $this, 'admin_bar_menu' ) );
		}
	}

	function comments_pending() {
		return wp_count_comments()->moderated;
	}

	function admin_bar_menu( $bar ) {
		$this->bar = $bar;
	}

	function render_css( $level = 1 ) {
		switch( $level ) {
			case 3 :
				echo $this->animate( '#FF3333', '0.5' );
				break;
			case 2 :
				echo $this->animate( '#FF3333', '1' );
				break;
			case 1 :
			default :
					echo $this->animate( '#B94A00', '2' );
				break;
		}
	}

	function css_vendors() {
		return array( '', '-moz-', '-webkit-' );
	}

	function css3( $prop, $value ) {
		$return = '';
		foreach ( $this->css_vendors() as $vendor ) {
			$return .= $vendor . $prop . ':' . $value . ';';
		}
		return $return;
	}

	function css3_keyframes( $name, $frames ) {
		$return = '';
		foreach ( $this->css_vendors() as $vendor ) {
			$return .= '@' . $vendor . 'keyframes ' . $name . ' {' . $frames . '}';
		}
		return $return;
	}

	function animate( $color, $duration ) {
		return $this->style( $this->css3_keyframes('cwsmoderationbuddy', '
			80% { background-color: ' . $color . ' }
			100% { background-color: #464646 }'
		) .
		'#wp-admin-bar-comments { background-color: ' . $color . ' !important;'
		. $this->css3( 'animation-name', 'cwsmoderationbuddy' )
		. $this->css3( 'animation-duration', $duration . 's' )
		. $this->css3( 'animation-iteration-count', 'infinite' )
		. $this->css3( 'animation-direction', 'alternate' )
		. $this->css3( 'animation-timing-function', 'ease-in-out' ) );
	}

	function style( $css ) {
		return '<style>' . $css . '</style>';
	}

	function add_css() {
		if ( $this->bar->get_node( 'comments' ) ) {
			$pending = $this->comments_pending();
			if ( $pending < 5 ) {
				return;
			} elseif ( $pending < 10 ) {
				$this->render_css( 1 );
			} elseif ( $pending < 25  ) {
				$this->render_css( 2 );
			} else {
				$this->render_css( 3 );
			}
		}
	}
}

new CWS_Moderation_Buddy_Plugin;