<?php
/**
 * Admin Functions
 *
 * General admin area functions. Also see page.php.
 *
 * @package    Widget_Importer_Exporter
 * @subpackage Functions
 * @copyright  Copyright (c) 2017, ChurchThemes.com
 * @link       https://churchthemes.com/plugins/widget-importer-exporter/
 * @license    GPLv2 or later
 * @since      1.4
 */

// No direct access.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Enqueue admin styles.
 *
 * @since 1.5
 */
function wie_enqueue_styles() {

	// Get current screen.
	$screen = get_current_screen();

	// Only on WIE and Dashboard screens.
	if ( ! in_array( $screen->base, array( 'dashboard', 'tools_page_widget-importer-exporter' ), true ) ) {
		return;
	}

	// Enqueue styles
	wp_enqueue_style( 'wie-main', WIE_URL . '/' . WIE_CSS_DIR . '/style.css', false, WIE_VERSION ); // Bust cache on update.

}

add_action( 'admin_enqueue_scripts', 'wie_enqueue_styles' ); // admin-end only.

/**
 * Add plugin action link.
 *
 * Insert an "Import/Export" link into the plugin's action links (Plugin page's list)
 *
 * @since 1.4
 * @param array $links Existing action links.
 * @return array Modified action links
 */
function wie_add_plugin_action_link( $links ) {

	// If has permission.
	if ( ! current_user_can( 'edit_theme_options' ) ) {
		return array();
	}

	// Have links array?
	if ( is_array( $links ) ) {

		// Append "Settings" link.
		$links[] = sprintf(
			'<a href="%1$s">%2$s</a>',
			esc_url( admin_url( 'tools.php?page=widget-importer-exporter' ) ),
			esc_html__( 'Import/Export', 'widget-importer-exporter' )
		);

	}

	return $links;

}

add_filter( 'plugin_action_links_' . plugin_basename( WIE_FILE ), 'wie_add_plugin_action_link' );

/**
 * Add link on Widgets page
 *
 * Insert an "Import/Export" link on the Widgets screen after 'Manage with Live Preview'.
 * This is done with JavaScript since there is no hook for this area.
 *
 * @since 1.4
 */
function wie_add_widgets_screen_link() {

	// Build link with same style as 'Manage with Live Preview'.
	$link_html = sprintf(
		wp_kses(
			' <a href="%1$s" class="page-title-action">%2$s</a>',
			array(
				// Link tag only.
				'a' => array(
					'href'  => array(),
					'class' => array(),
				),
			)
		),
		esc_url( admin_url( 'tools.php?page=widget-importer-exporter' ) ),
		esc_html__( 'Import/Export', 'widget-importer-exporter' )
	);

	// Output JavaScript to insert link after 'Manage with Live Preview'.
	?>

	<script type="text/javascript">

		jQuery( document ).ready( function ( $ ) {

			// Encode string for security
			var link_html = <?php echo wp_json_encode( $link_html ); ?>;

			// Insert after last button by title
			$( '.page-title-action' ).last().after( link_html );

		} );

	</script>
	<?php

}

// WP 4.6+.
add_action( 'admin_print_footer_scripts-widgets.php', 'wie_add_widgets_screen_link' );