mikeschinkel/functions.php

## functions.php
<?php
/*
 * Code Examples for Master WordPress Custom Post Types - WordCamp Atlanta 2012
 *
 * Author: Mike Schinkel
 * Author URI: http://about.me/mikeschinkel
 *
 */
add_action( 'init', 'mikes_theme_init' );
function mikes_theme_init() {
	register_post_type( 'comic', array(
		'public' => true,
		'label' => 'Comics',
		'query_var' => 'comic_qv',
		'rewrite' => array(
			'slug'				=>'comics',
			'with_front' 	=> false
		),
	));
	register_post_type( 'episode', array(
		'label' => 'Episodes',
		'public' => true,
			'query_var' => 'episode_qv',
		'rewrite' => false,
		'supports' => array(
		 'title',
		 'thumbnail',
		 'excerpt',
		),
 	));
	register_taxonomy( 'art-style', 'comic',  array(
		'hierarchical' 	=> true,
		'label' 				=> 'Art Styles',
		'rewrite' 			=> array(
			'slug'				=> 'art-styles',
			'with_front' 	=> false
		),
	));
	add_rewrite_rule(
		'^comics/([^/]*)/([^/]*)/?',
		'index.php?post_type=episode&comic_qv=$matches[1]&episode_qv=$matches[2]',
		'top'
	);

}
add_action( 'restrict_manage_posts', 'mikes_theme_restrict_manage_posts' );
function mikes_theme_restrict_manage_posts() {
	$comic_id = empty( $_GET['comic_id'] ) ? 0 : $_GET['comic_id'];
	echo 'Comic: ' . mikes_theme_comic_dropdown( $comic_id, 'comic_id' );
}
add_filter('pre_get_posts','mikes_theme_pre_get_posts');
function mikes_theme_pre_get_posts( $query ) {
	global $pagenow;
	global $typenow;
	global $wp_the_query;
	if ( $query === $wp_the_query &&
			 'edit.php' == $pagenow &&
			 'episode' == $typenow &&
			 ! empty( $_GET['comic_id'] ) ) {
		$query->set( 'post_parent', intval( $_GET['comic_id'] ) );
	}
}

add_action( 'post_type_link', 'mikes_theme_post_type_link', 10, 4 );
function mikes_theme_post_type_link( $link, $post, $leavename, $sample ) {
	if ( 'episode' == $post->post_type ) {
		$parent = get_post( $post->post_parent );
		$comic_slug = isset( $parent->post_name ) ? $parent->post_name : '%comic%';
		$episode_slug = $sample ? '%postname%' : $post->post_name;
		$link = preg_replace( '#^(https?://[^/]+/).*$#', "$1comics/{$comic_slug}/{$episode_slug}/", $link );
	}
	return $link;
}

add_action( 'request', 'mikes_theme_request' );
function mikes_theme_request( $query_vars ) {
	global $wp;
	/**
	 * Trigger this test if the match URL rewrite rule is the one added by this plugin
	 */
	if ( ! is_admin() && isset( $query_vars['post_type'] ) && 'episode' == $query_vars['post_type'] ) {
		/**
		 * Lookup the client's post
		 */
		$comic = get_page_by_path( $query_vars['comic_qv'], OBJECT, 'comic' );
		/**
		 * Lookup the client project's post, scoped to the client
		 */
		$episode_query = new WP_Query( array(
			'name'              => $query_vars['episode_qv'],
			'post_type'         => 'episode',
			'fields'            => 'ids',
			'post_parent'       => $comic->ID,
			'posts_per_page'    => 1,
			'suppress_filters'  => true,
		));
		/**
		 * If the client project was not found for the client, trigger 404 error.
		 */
		if ( 0 == count( $episode_query->posts ) ) {
			$query_vars = array( 'error' => '404' );
		}
	}
	return $query_vars;
}


add_action( 'add_meta_boxes', 'mikes_theme_add_meta_boxes' );
function mikes_theme_add_meta_boxes( $post_type ) {
	if ( 'comic' == $post_type )
		add_meta_box( 'comic_info_box', // $id
			'Comic Information', // $title
			'mikes_theme_comic_meta_box', // $callback
			'comic', 	// $post_type
			'normal', // $context
			'high' 		// $priority
		);
	if ( 'episode' == $post_type )
		add_meta_box( 'episode_info_box', // $id
			'Episode Info', // $title
			'mikes_theme_episode_meta_box', // $callback
			'episode', 	// $post_type
			'side', // $context
			'low' 		// $priority
		);
}
function mikes_theme_episode_meta_box( $post ) {
	$select_html = mikes_theme_comic_dropdown( $post->post_parent );
	$html =<<<HTML
<table>
	<tr>
		<th><label for="parent_id">Comic:</label></th>
		<td>{$select_html}</td>
	</tr>
</table>
HTML;
	echo $html;
}
function mikes_theme_comic_meta_box( $post ) {
	$cartoonist = get_post_meta( $post->ID, '_cartoonist', true );
	$since = get_post_meta( $post->ID, '_since', true );
	$website = get_post_meta( $post->ID, '_website', true );
	$html =<<<HTML
<table>
	<tr>
		<th><label for="cartoonist">Cartoonist:</label></th>
		<td><input type="text" name="cartoonist" value="{$cartoonist}" size="25" /></td>
	</tr>
	<tr>
		<th><label for="since">Since:</label></th>
		<td><input type="text" name="since" value="{$since}" size="15" /></td>
	</tr>
	<tr>
		<th><label for="website">Website:</label></th>
		<td><input type="text" name="website" value="{$website}" size="25" /></td>
	</tr>
</table>
HTML;
	echo $html;
}
add_action( 'save_post', 'mikes_theme_save_post' );
function mikes_theme_save_post( $post_id ) {
	if ( 'comic' == $post_type ) {
		update_post_meta( $post_id, '_cartoonist', $_POST['cartoonist'] );
		update_post_meta( $post_id, '_since', $_POST['since'] );
		update_post_meta( $post_id, '_website', $_POST['website'] );
	}
}

add_filter( 'manage_edit-comic_columns', 'mikes_theme_manage_edit_comic_columns' );
function mikes_theme_manage_edit_comic_columns( $columns ) {
	$new_columns = array();
	foreach( $columns as $key => $value ) {
		if ( 'date' == $key ) {
			$new_columns['cartoonist'] = 'Cartoonist';
			$new_columns['website'] = 'Website';
		}
		$new_columns[$key] = $value;
	}
	return $new_columns;
}

add_filter( 'manage_edit-episode_columns', 'mikes_theme_manage_edit_episode_columns' );
function mikes_theme_manage_edit_episode_columns( $columns ) {
	$new_columns = array();
	foreach( $columns as $key => $value ) {
		if ( 'date' == $key ) {
			$new_columns['comic'] = 'Comic';
		}
		$new_columns[$key] = $value;
	}
	return $new_columns;
}

add_filter( 'manage_comic_posts_custom_column', 'mikes_theme_manage_comic_posts_custom_column', 10, 2 );
function mikes_theme_manage_comic_posts_custom_column( $column_name, $post_id ) {
	switch ( $column_name ) {
		case 'cartoonist':
			echo get_post_meta( $post_id, "_cartoonist", true );
			break;
		case 'website':
			$website = get_post_meta( $post_id, "_website", true );
			$domain = trim( str_replace( 'http://', '', $website ), '/' );
			echo "<a href=\"{$website}\">{$domain}</a>";
			break;
	}
}
add_filter( 'manage_episode_posts_custom_column', 'mikes_theme_manage_episode_posts_custom_column', 10, 2 );
function mikes_theme_manage_episode_posts_custom_column( $column_name, $post_id ) {
	switch ( $column_name ) {
		case 'comic':
			$post = get_post( $post_id );
			if ( !empty( $post->post_parent ) ) {
				$title = get_the_title( $post->post_parent );
				$link = admin_url( "post.php?post={$post->post_parent}&action=edit" );
				$html = <<<HTML
<a href="{$link}">{$title}</a>
HTML;
				echo $html;
			}
			break;
	}
}

function mikes_theme_comic_dropdown( $selected_id, $name = 'parent_id' ) {
	$query = new WP_Query( 'post_type=comic&posts_per_page=-1' );
	$comics = array();
	foreach( $query->posts as $comic ) {
		$title = get_the_title( $comic->ID );
		$selected = $comic->ID == intval( $selected_id ) ? ' selected' : '';
		$comics[ $comic->ID ] = <<<HTML
<option value="{$comic->ID}"{$selected}>{$title}</option>
HTML;
	}
	$comics = implode( '', $comics );
	$html =<<<HTML
<select name="{$name}">
<option value="0">None selected</option>
{$comics}
</select>
HTML;
	return $html;
}
	<?php
	/*
	* Code Examples for Master WordPress Custom Post Types - WordCamp Atlanta 2012
	*
	* Author: Mike Schinkel
	* Author URI: http://about.me/mikeschinkel
	*
	*/
	add_action( 'init', 'mikes_theme_init' );
	function mikes_theme_init() {
	register_post_type( 'comic', array(
	'public' => true,
	'label' => 'Comics',
	'query_var' => 'comic_qv',
	'rewrite' => array(
	'slug' =>'comics',
	'with_front' => false
	),
	));
	register_post_type( 'episode', array(
	'label' => 'Episodes',
	'public' => true,
	'query_var' => 'episode_qv',
	'rewrite' => false,
	'supports' => array(
	'title',
	'thumbnail',
	'excerpt',
	),
	));
	register_taxonomy( 'art-style', 'comic', array(
	'hierarchical' => true,
	'label' => 'Art Styles',
	'rewrite' => array(
	'slug' => 'art-styles',
	'with_front' => false
	),
	));
	add_rewrite_rule(
	'^comics/([^/])/([^/])/?',
	'index.php?post_type=episode&comic_qv=$matches[1]&episode_qv=$matches[2]',
	'top'
	);

	}
	add_action( 'restrict_manage_posts', 'mikes_theme_restrict_manage_posts' );
	function mikes_theme_restrict_manage_posts() {
	$comic_id = empty( $_GET['comic_id'] ) ? 0 : $_GET['comic_id'];
	echo 'Comic: ' . mikes_theme_comic_dropdown( $comic_id, 'comic_id' );
	}
	add_filter('pre_get_posts','mikes_theme_pre_get_posts');
	function mikes_theme_pre_get_posts( $query ) {
	global $pagenow;
	global $typenow;
	global $wp_the_query;
	if ( $query === $wp_the_query &&
	'edit.php' == $pagenow &&
	'episode' == $typenow &&
	! empty( $_GET['comic_id'] ) ) {
	$query->set( 'post_parent', intval( $_GET['comic_id'] ) );
	}
	}

	add_action( 'post_type_link', 'mikes_theme_post_type_link', 10, 4 );
	function mikes_theme_post_type_link( $link, $post, $leavename, $sample ) {
	if ( 'episode' == $post->post_type ) {
	$parent = get_post( $post->post_parent );
	$comic_slug = isset( $parent->post_name ) ? $parent->post_name : '%comic%';
	$episode_slug = $sample ? '%postname%' : $post->post_name;
	$link = preg_replace( '#^(https?://[^/]+/).*$#', "$1comics/{$comic_slug}/{$episode_slug}/", $link );
	}
	return $link;
	}

	add_action( 'request', 'mikes_theme_request' );
	function mikes_theme_request( $query_vars ) {
	global $wp;
	/**
	* Trigger this test if the match URL rewrite rule is the one added by this plugin
	*/
	if ( ! is_admin() && isset( $query_vars['post_type'] ) && 'episode' == $query_vars['post_type'] ) {
	/**
	* Lookup the client's post
	*/
	$comic = get_page_by_path( $query_vars['comic_qv'], OBJECT, 'comic' );
	/**
	* Lookup the client project's post, scoped to the client
	*/
	$episode_query = new WP_Query( array(
	'name' => $query_vars['episode_qv'],
	'post_type' => 'episode',
	'fields' => 'ids',
	'post_parent' => $comic->ID,
	'posts_per_page' => 1,
	'suppress_filters' => true,
	));
	/**
	* If the client project was not found for the client, trigger 404 error.
	*/
	if ( 0 == count( $episode_query->posts ) ) {
	$query_vars = array( 'error' => '404' );
	}
	}
	return $query_vars;
	}


	add_action( 'add_meta_boxes', 'mikes_theme_add_meta_boxes' );
	function mikes_theme_add_meta_boxes( $post_type ) {
	if ( 'comic' == $post_type )
	add_meta_box( 'comic_info_box', // $id
	'Comic Information', // $title
	'mikes_theme_comic_meta_box', // $callback
	'comic', // $post_type
	'normal', // $context
	'high' // $priority
	);
	if ( 'episode' == $post_type )
	add_meta_box( 'episode_info_box', // $id
	'Episode Info', // $title
	'mikes_theme_episode_meta_box', // $callback
	'episode', // $post_type
	'side', // $context
	'low' // $priority
	);
	}
	function mikes_theme_episode_meta_box( $post ) {
	$select_html = mikes_theme_comic_dropdown( $post->post_parent );
	$html =<<<HTML
	<table>
	<tr>
	<th><label for="parent_id">Comic:</label></th>
	<td>{$select_html}</td>
	</tr>
	</table>
	HTML;
	echo $html;
	}
	function mikes_theme_comic_meta_box( $post ) {
	$cartoonist = get_post_meta( $post->ID, '_cartoonist', true );
	$since = get_post_meta( $post->ID, '_since', true );
	$website = get_post_meta( $post->ID, '_website', true );
	$html =<<<HTML
	<table>
	<tr>
	<th><label for="cartoonist">Cartoonist:</label></th>
	<td><input type="text" name="cartoonist" value="{$cartoonist}" size="25" /></td>
	</tr>
	<tr>
	<th><label for="since">Since:</label></th>
	<td><input type="text" name="since" value="{$since}" size="15" /></td>
	</tr>
	<tr>
	<th><label for="website">Website:</label></th>
	<td><input type="text" name="website" value="{$website}" size="25" /></td>
	</tr>
	</table>
	HTML;
	echo $html;
	}
	add_action( 'save_post', 'mikes_theme_save_post' );
	function mikes_theme_save_post( $post_id ) {
	if ( 'comic' == $post_type ) {
	update_post_meta( $post_id, '_cartoonist', $_POST['cartoonist'] );
	update_post_meta( $post_id, '_since', $_POST['since'] );
	update_post_meta( $post_id, '_website', $_POST['website'] );
	}
	}

	add_filter( 'manage_edit-comic_columns', 'mikes_theme_manage_edit_comic_columns' );
	function mikes_theme_manage_edit_comic_columns( $columns ) {
	$new_columns = array();
	foreach( $columns as $key => $value ) {
	if ( 'date' == $key ) {
	$new_columns['cartoonist'] = 'Cartoonist';
	$new_columns['website'] = 'Website';
	}
	$new_columns[$key] = $value;
	}
	return $new_columns;
	}

	add_filter( 'manage_edit-episode_columns', 'mikes_theme_manage_edit_episode_columns' );
	function mikes_theme_manage_edit_episode_columns( $columns ) {
	$new_columns = array();
	foreach( $columns as $key => $value ) {
	if ( 'date' == $key ) {
	$new_columns['comic'] = 'Comic';
	}
	$new_columns[$key] = $value;
	}
	return $new_columns;
	}

	add_filter( 'manage_comic_posts_custom_column', 'mikes_theme_manage_comic_posts_custom_column', 10, 2 );
	function mikes_theme_manage_comic_posts_custom_column( $column_name, $post_id ) {
	switch ( $column_name ) {
	case 'cartoonist':
	echo get_post_meta( $post_id, "_cartoonist", true );
	break;
	case 'website':
	$website = get_post_meta( $post_id, "_website", true );
	$domain = trim( str_replace( 'http://', '', $website ), '/' );
	echo "<a href=\"{$website}\">{$domain}</a>";
	break;
	}
	}
	add_filter( 'manage_episode_posts_custom_column', 'mikes_theme_manage_episode_posts_custom_column', 10, 2 );
	function mikes_theme_manage_episode_posts_custom_column( $column_name, $post_id ) {
	switch ( $column_name ) {
	case 'comic':
	$post = get_post( $post_id );
	if ( !empty( $post->post_parent ) ) {
	$title = get_the_title( $post->post_parent );
	$link = admin_url( "post.php?post={$post->post_parent}&action=edit" );
	$html = <<<HTML
	<a href="{$link}">{$title}</a>
	HTML;
	echo $html;
	}
	break;
	}
	}

	function mikes_theme_comic_dropdown( $selected_id, $name = 'parent_id' ) {
	$query = new WP_Query( 'post_type=comic&posts_per_page=-1' );
	$comics = array();
	foreach( $query->posts as $comic ) {
	$title = get_the_title( $comic->ID );
	$selected = $comic->ID == intval( $selected_id ) ? ' selected' : '';
	$comics[ $comic->ID ] = <<<HTML
	<option value="{$comic->ID}"{$selected}>{$title}</option>
	HTML;
	}
	$comics = implode( '', $comics );
	$html =<<<HTML
	<select name="{$name}">
	<option value="0">None selected</option>
	{$comics}
	</select>
	HTML;
	return $html;
	}