<?php
/**
 * AnsPresss
 *
 * @package   AnsPress
 * @author    Rahul Aryan <admin@tovolt.com>
 * @license   GPL-2.0+
 * @link      http://tovolt.com
 * @copyright 2014 ToVolt
 */

/**
 * anspress_admin class. This class should ideally be used to work with the
 * administrative side of the WordPress site.
 *
 * @package AnsPress
 * @author  Rahul Aryan <admin@tovolt.com>
 */
class anspress_admin {

	/**
	 * Instance of this class.
	 
	 * @var      object
	 */
	protected static $instance = null;

	/**
	 * Slug of the plugin screen.
	 
	 * @var      string
	 */
	protected $plugin_screen_hook_suffix = null;
	
	// Name of the array
	protected $option_name = 'anspress_opt';

	
	/**
	 * Initialize the plugin by loading admin scripts & styles and adding a
	 * settings page and menu.
	 *
	 */
	private function __construct() {
		/*
		 * Call $plugin_slug from public plugin class.
		 *
		 */
		$plugin = anspress::get_instance();
		$this->plugin_slug = $plugin->get_plugin_slug();

		// Load admin style sheet and JavaScript.
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_styles' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_scripts' ) );

		// Add the options page and menu item.
		add_action( 'admin_menu', array( $this, 'add_plugin_admin_menu' ) );

		// Add an action link pointing to the options page.
		$plugin_basename = plugin_basename( plugin_dir_path( __DIR__ ) . $this->plugin_slug . '.php' );
		add_filter( 'plugin_action_links_' . $plugin_basename, array( $this, 'add_action_links' ) );
		
		add_action('admin_init', array($this, 'register_setting'));
		
		// flush rewrite rule if option updated
		add_action('admin_init', array($this, 'flush_rules'));

	}

	/**
	 * Return an instance of this class.
	 * @return    object    A single instance of this class.
	 */
	public static function get_instance() {
		// If the single instance hasn't been set, set it now.
		if ( null == self::$instance ) {
			self::$instance = new self;
		}

		return self::$instance;
	}

	/**
	 * Register and enqueue admin-specific style sheet.
	 * @return    null    Return early if no settings page is registered.
	 */
	public function enqueue_admin_styles() {

		$screen = get_current_screen();
		if ( $this->plugin_screen_hook_suffix == $screen->id  || 'question' == get_post_type() || 'answer' == get_post_type() || is_tax( 'question_category' ) || is_tax( 'question_tags' )) {	
			wp_enqueue_style( 'ap-admin-css', ANSPRESS_URL.'assets/ap-admin.css');
			wp_enqueue_style( 'ap-bootstrap-css', ANSPRESS_URL.'assets/bootstrap.css');
		}

	}

	/**
	 * Register and enqueue admin-specific JavaScript.
	 * @return    null    Return early if no settings page is registered.
	 */
	public function enqueue_admin_scripts() {
		$screen = get_current_screen();
		if ( $this->plugin_screen_hook_suffix == $screen->id  || 'question' == get_post_type() || 'answer' == get_post_type() || is_tax( 'question_category' ) || is_tax( 'question_tags' )) {
			wp_enqueue_script( 'jquery-ui-autocomplete' );
			wp_enqueue_script( 'ap-bootstrap-js', ANSPRESS_URL.'assets/bootstrap.js');		
			wp_enqueue_script( 'ap-admin-js', ANSPRESS_URL.'assets/ap-admin.js');		
		}
		

	}

	/**
	 * Register the administration menu for this plugin into the WordPress Dashboard menu.
	 */
	public function add_plugin_admin_menu() {

		/*
		 * Add a settings page for this plugin to the Settings menu.
		 *
		 * NOTE:  Alternative menu locations are available via WordPress administration menu functions.
		 *
		 *        Administration Menus: http://codex.wordpress.org/Administration_Menus
		*/
		$this->plugin_screen_hook_suffix = add_options_page(
			__( 'AnsPress Options', $this->plugin_slug ),
			__( 'AnsPress Options', $this->plugin_slug ),
			'manage_options',
			'anspress_settings',
			array( $this, 'display_plugin_admin_page' )
		);
	}

	/**
	 * Render the settings page for this plugin.
	 */
	public function display_plugin_admin_page() {
		include_once( 'views/admin.php' );
	}

	/**
	 * Add settings action link to the plugins page.
	 */
	public function add_action_links( $links ) {

		return array_merge(
			array(
				'settings' => '<a href="' . admin_url( 'options-general.php?page=' . $this->plugin_slug ) . '">' . __( 'Settings', $this->plugin_slug ) . '</a>'
			),
			$links
		);

	}
	//register settings
	public function register_setting(){
		// Register settings and call sanitation functions
		register_setting( 'anspress_options', 'anspress_opt', array($this, 'validate_options') );
	}
	public function validate_options( $input ) {
		global $sa_options, $sa_categories, $sa_layouts;

		$settings = get_option( 'sa_options', $sa_options );
		
		// We strip all tags from the text field, to avoid vulnerablilties like XSS
		$input['footer_copyright'] = wp_filter_nohtml_kses( $input['footer_copyright'] );
		
		// We strip all tags from the text field, to avoid vulnerablilties like XSS
		$input['intro_text'] = wp_filter_post_kses( $input['intro_text'] );
		
		// We select the previous value of the field, to restore it in case an invalid entry has been given
		$prev = $settings['featured_cat'];
		// We verify if the given value exists in the categories array
		if ( !array_key_exists( $input['featured_cat'], $sa_categories ) )
			$input['featured_cat'] = $prev;
		
		// We select the previous value of the field, to restore it in case an invalid entry has been given
		$prev = $settings['layout_view'];
		// We verify if the given value exists in the layouts array
		if ( !array_key_exists( $input['layout_view'], $sa_layouts ) )
			$input['layout_view'] = $prev;
		
		// If the checkbox has not been checked, we void it
		if ( ! isset( $input['author_credits'] ) )
			$input['author_credits'] = null;
		// We verify if the input is a boolean value
		$input['author_credits'] = ( $input['author_credits'] == 1 ? 1 : 0 );
		
		return $input;
	}
	public function flush_rules(){
		// flush_rules if option updated	
	
		if(isset($_GET['page']) && ('anspress_settings' == $_GET['page']) && isset($_GET['settings-updated']) && $_GET['settings-updated']){
			flush_rewrite_rules();
		}
	}


}