<?php
// Register Custom Taxonomy
if ( ! function_exists( 'tqe_custom_taxonomy_edition' ) ) {
function tqe_custom_taxonomy_edition() {

	$labels = array(
		'name'                       => _x( 'Editions', 'Taxonomy General Name', 'tqe' ),
		'singular_name'              => _x( 'Edition', 'Taxonomy Singular Name', 'tqe' ),
		'menu_name'                  => __( 'Edition', 'tqe' ),
		'all_items'                  => __( 'All Editions', 'tqe' ),
		'parent_item'                => __( 'Parent Edition', 'tqe' ),
		'parent_item_colon'          => __( 'Parent Edition:', 'tqe' ),
		'new_item_name'              => __( 'New Edition Name', 'tqe' ),
		'add_new_item'               => __( 'Add New Edition', 'tqe' ),
		'edit_item'                  => __( 'Edit Edition', 'tqe' ),
		'update_item'                => __( 'Update Edition', 'tqe' ),
		'view_item'                  => __( 'View Edition', 'tqe' ),
		'separate_items_with_commas' => __( 'Separate editions with commas', 'tqe' ),
		'add_or_remove_items'        => __( 'Add or remove items', 'tqe' ),
		'choose_from_most_used'      => __( 'Choose from the most used', 'tqe' ),
		'popular_items'              => __( 'Popular Editions', 'tqe' ),
		'search_items'               => __( 'Search Editions', 'tqe' ),
		'not_found'                  => __( 'Not Found', 'tqe' ),
		'no_terms'                   => __( 'No editions', 'tqe' ),
		'items_list'                 => __( 'Editions list', 'tqe' ),
		'items_list_navigation'      => __( 'Editions list navigation', 'tqe' ),
	);
	$args = array(
		'labels'                     => $labels,
		'hierarchical'               => true,
		'public'                     => true,
		'show_ui'                    => true,
		'show_admin_column'          => true,
		'show_in_nav_menus'          => true,
		'show_tagcloud'              => true,
	);
	register_taxonomy( 'edition', array( 'post' ), $args );

}
add_action( 'init', 'tqe_custom_taxonomy_edition', 0 );

}

/**
 * Register columns for our taxonomy
 */
function tqe_register_category_columns( $columns ) {

	$columns['first-appeared'] = __( 'First Appeared', 'tqe' );

	return $columns;
}
add_filter( 'manage_edit-edition_columns', 'tqe_register_category_columns' );

/**
 * Retrieve value for our custom column
 *
 * @param string $string      Blank string.
 * @param string $column_name Name of the column.
 * @param int    $term_id     Term ID.
 */
function tqe_category_column_display( $string = '', $column_name, $term_id ) {

	return esc_html( get_term_meta( $term_id, $column_name, true ) ); // XSS ok.

}
add_filter( 'manage_edition_custom_column', 'tqe_category_column_display', 10, 3 );

// Prepare field markup for Quick Edit box & store user-input data
/**
 * Display markup or template for custom field
 */
function tqe_quick_edit_category_field( $column_name, $screen ) {
	// If we're not iterating over our custom column, then skip
	if ( $screen != 'edition' && $column_name != 'first-appeared' ) {
		return false;
	}
	?>
	<fieldset>
		<div id="gwp-first-appeared" class="inline-edit-col">
			<label>
				<span class="title"><?php _e( 'First Appeared', 'tqe' ); ?></span>
				<span class="input-text-wrap"><input type="text" name="<?php echo esc_attr( $column_name ); ?>" class="ptitle" value=""></span>
			</label>
		</div>
	</fieldset>
	<?php
}
add_action( 'quick_edit_custom_box', 'tqe_quick_edit_category_field', 10, 2 );

/**
 * Callback runs when category is updated
 * Will save user-provided input into the wp_termmeta DB table
 */
function tqe_quick_edit_save_category_field( $term_id ) {
	if ( isset( $_POST['first-appeared'] ) ) {
		// security tip: kses
		update_term_meta( $term_id, 'first-appeared', $_POST['first-appeared'] );
	}
}
add_action( 'edited_edition', 'tqe_quick_edit_save_category_field' );

// Display new Taxonomy custom column
/**
 * Front-end stuff for pulling in user-input values dynamically
 * into our input field.
 */
function tqe_quickedit_category_javascript() {
	$current_screen = get_current_screen();

	if ( $current_screen->id != 'edit-edition' || $current_screen->taxonomy != 'edition' ) {
		return;
	}

	// Ensure jQuery library is loaded
	wp_enqueue_script( 'jquery' );
	?>
	<script type="text/javascript">
		/*global jQuery*/
		jQuery(function($) {
			$('#the-list').on( 'click', 'a.editinline', function( e ) {
				e.preventDefault();
				var $tr = $(this).closest('tr');
				var val = $tr.find('td.first-appeared').text();
				// Update field
				$('tr.inline-edit-row :input[name="first-appeared"]').val(val ? val : '');
			});
		});
	</script>
	<?php
}
add_action( 'admin_print_footer_scripts-edit-tags.php', 'tqe_quickedit_category_javascript' );