gistfile1.php

<?php
/*
Plugin Name: P-Ntil Quote Source
Plugin URI: http://luketeaford.com/plugins/pntil-quote-source
Description: A plugin to add author and source to quote post formats. Last updated 8/7/2013.
Version: 0.1
Author: Luke Teaford
Author URI: http://luketeaford.com
License: GPL2
*/

// ACTIVATION
function pntil_quote_source_activate() {
  flush_rewrite_rules();
}

register_activation_hook( __FILE__, 'quote_source_activate' );
add_action( 'init', 'film_journal_activate', 0 );

add_action('admin_init', 'meta_box_loader');

function meta_box_loader() {
  if ( get_post_format($_GET['id']) == "format" ) {
      add_action( 'add_meta_boxes', 'pntil_quote_source_meta_box' );
  }
}

function pntil_quote_source_meta_box() {
	add_meta_box( 'pntil_quote_source_meta_box',
		'Quote Source',
		'display_pntil_quote_source_meta_box',
		'post', 'normal', 'high'
	 );
}

function display_pntil_quote_source_meta_box( $quote ) {
  
	$quote_author = esc_html( get_post_meta( $quote->ID, 'quote_author', true ) );
	$quote_source = esc_html( get_post_meta( $quote->ID, 'quote_source', true ) );?>
	
	<table>
	<tr>
	<td>Author</td>
	<td><input type="text" name="quote_author_name" placeholder="Author" value="<?php echo $quote_author; ?>"></td>
	</tr>
	<tr>
	<td>Source</td>
	<td><input type="text" name="quote_source_name" placeholder="Source" value="<?php echo $quote_source; ?>"></td>
	</tr>
	</table>
  <?php 
} //END OF FUNCTION DISPLAY PNTIL QUOTE SOURCE META BOX

add_action( 'save_post', 'add_pntil_quote_source_fields', 10, 2 );

function add_pntil_quote_source_fields( $quote_post_id, $quote_post ) {
    if ( $quote_post->post_type == 'post') {//THIS DOESN'T WORK HOW I WOULD EXPECT (PROBABLY BECAUSE THIS ISN'T IN THE LOOP)
        if ( isset( $_POST['quote_author_name'] ) && $_POST['quote_author_name'] != '' ) {
            update_post_meta( $quote_post_id, 'quote_author', $_POST['quote_author_name'] );
        }
        if ( isset( $_POST['quote_source_name'] ) && $_POST['quote_source_name'] != '' ) {
            update_post_meta( $quote_post_id, 'quote_source', $_POST['quote_source_name'] );
        }
    }
}

//REGISTER DEACTIVATION HOOK
function pntil_quote_source_deactivate() {
	flush_rewrite_rules();
}
register_deactivation_hook( __FILE__, 'pntil_quote_source_deactivate' );?>