<?php
/**
 * AnsPress.
 *
 * @package   AnsPress
 * @author    Rahul Aryan <admin@rahularyan.com>
 * @license   GPL-2.0+
 * @link      http://rahularyan.com
 * @copyright 2014 Rahul Aryan
 */


class anspress_view {

	/**
	 * Instance of this class.
	 */
	protected static $instance = null;

	 /**
     * 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::$instance;
    }
	/**
	 * Initialize the plugin by setting localization and loading public scripts
	 * and styles.
	 */
	private function __construct() {
		add_action( 'template_redirect', array($this, 'insert_views') );
	}

	public function insert_views($template){
		//Log current time as user meta, so later we can check when user was active.
		if(is_user_logged_in())
			update_user_meta( get_current_user_id(), '__last_active', current_time('mysql'));

		if(is_question())
			ap_insert_views(get_question_id(), 'question');
		if(is_ap_user() && ap_get_displayed_user_id() != get_current_user_id() && ap_get_displayed_user_id())
			ap_insert_views(ap_get_displayed_user_id(), 'profile');

	}
}

/**
 * Insert view data in ap_meta table and update post meta ANSPRESS_VIEW_META
 * @param  integer $data_id
 * @param  string $type
 * @return boolean
 */
function ap_insert_views($data_id, $type){
	if($type == 'question'){

		$userid = get_current_user_id();

		// log in DB only if not viewed before and not anonymous
		if(!ap_is_already_viewed(get_current_user_id(), $data_id) && $userid != 0){

			/**
			 * FILTER: ap_log_ip_view
			 * Toggle ip logging for view count
			 * @var boolean
			 */
			$log_ip = apply_filters( 'ap_log_ip_view', true );

			$ip = $log_ip ? $_SERVER['REMOTE_ADDR'] : '';

			ap_add_meta($userid, 'post_view', $data_id, $ip );
		}

		$view = ap_get_qa_views($data_id);

		$view = $view+1;

		update_post_meta( $data_id, ANSPRESS_VIEW_META, apply_filters('ap_insert_views', $view ));

		do_action('after_insert_views', $data_id, $view);

		return true;

	}elseif($type == 'profile'){

		$userid = get_current_user_id();

		// log in DB only if not viewed before and not anonymous
		if(!ap_is_already_viewed(get_current_user_id(), $data_id, 'profile_view') && $userid != 0)
			ap_add_meta($userid, 'profile_view', $data_id, $_SERVER['REMOTE_ADDR'] );

		$view = ap_get_profile_views($data_id);

		$view = $view+1;

		update_user_meta( $data_id, '__profile_views', apply_filters('ap_insert_views', $view ));

		do_action('after_insert_views', $data_id, $view);

		return true;
	}
	return false;
}

function ap_get_qa_views($id = false){
	if(!$id) $id = get_the_ID();
	$views = get_post_meta( $id, ANSPRESS_VIEW_META, true );
	$views = empty($views) ? 1 : $views;

	return apply_filters('ap_post_views', $views);
}

function ap_get_profile_views($user_id = false){

	if(!$user_id) $user_id = ap_get_displayed_user_id();

	$views = get_user_meta( $user_id, '__profile_views', true );
	$views = empty($views) ? 1 : $views;

	return apply_filters('ap_profile_views', $views);
}

/**
 * @param integer $id
 */
function ap_get_views_db($id){
	return ap_meta_total_count('post_view', $id);
}

/**
 * @param integer $data_id
 */
function ap_is_already_viewed($user_id, $data_id, $type ='post_view'){

	$ip = sanitize_text_field($_SERVER['REMOTE_ADDR']);

	$done = ap_meta_user_done($type, $user_id, $data_id, false, $ip);

	return $done > 0 ? true : false;
}