<?php

/**
 * The concrete command that clone events.
 *
 * @author     Time.ly Network Inc.
 * @since      2.0
 *
 * @package    AI1EC
 * @subpackage AI1EC.Command
 */
class Ai1ec_Command_Clone extends Ai1ec_Command {

    /**
     * @var array The posts that must be cloned
     */
    protected $_posts = array();

    /**
     * @var bool Whether to redirect or not
     */
    protected $_redirect = false;

    /**
     * The abstract method concrete command must implement.
     *
     * Retrieve whats needed and returns it
     *
     * @return array
     */
    public function do_execute() {
        $id = 0;
        foreach ( $this->_posts as $post ) {
            $id = $this->ai1ec_duplicate_post_create_duplicate(
                $post['post'],
                $post['status']
            );
        }
        if ( true === $this->_redirect ) {
            if ( '' === $post['status'] ) {
                return array(
                    'url'        => ai1ec_admin_url(
                        'edit.php?post_type=' . AI1EC_POST_TYPE
                    ),
                    'query_args' => array()
                );
            } else {
                return array(
                    'url'        => ai1ec_admin_url(
                        'post.php?action=edit&post=' . $id
                    ),
                    'query_args' => array()
                );
            }
        }
        // no redirect, just go on with the page
        return array();
    }

    /**
     * Returns whether this is the command to be executed.
     *
     * I handle the logi of execution at this levele, which is not usual for
     * The front controller pattern, because othe extensions need to inject
     * logic into the resolver ( oAuth or ics export for instance )
     * and this seems to me to be the most logical way to do this.
     *
     * @return boolean
     */
    public function is_this_to_execute() {
        $current_action = $this->_registry->get(
            'http.request'
        )->get_current_action();

        if (
            current_user_can( 'edit_ai1ec_events' ) &&
            'clone' === $current_action &&
            ! empty( $_REQUEST['post'] ) &&
            ! empty( $_REQUEST['_wpnonce'] ) &&
            wp_verify_nonce( $_REQUEST['_wpnonce'], 'bulk-posts' )
        ) {
            foreach ( $_REQUEST['post'] as $post_id ) {
                $this->_posts[] = array(
                    'status' => '',
                    'post'   => get_post( $post_id )
                );
            }
            return true;
        }

        // other actions need the nonce to be verified

        // duplicate single post
        if (
            $current_action === 'ai1ec_duplicate_post_save_as_new_post' &&
            ! empty( $_REQUEST['post'] )
        ) {
            check_admin_referer( 'ai1ec_clone_'. $_REQUEST['post'] );

            $this->_posts[] = array(
                'status' => '',
                'post'   => get_post( $_REQUEST['post'] )
            );
            $this->_redirect = true;
            return true;
        }
        // duplicate single post as draft
        if (
            $current_action === 'ai1ec_duplicate_post_save_as_new_post_draft' &&
            ! empty( $_REQUEST['post'] )
        ) {
            check_admin_referer( 'ai1ec_clone_'. $_REQUEST['post'] );
            $this->_posts[] = array(
                'status' => 'draft',
                'post'   => get_post( $_REQUEST['post'] )
            );
            $this->_redirect = true;
            return true;
        }
        return false;
    }

    /**
     * Sets the render strategy.
     *
     * @param Ai1ec_Request_Parser $request
     */
    public function set_render_strategy( Ai1ec_Request_Parser $request ) {
        if ( true === $this->_redirect ) {
            $this->_render_strategy = $this->_registry
                ->get( 'http.response.render.strategy.redirect' );
        } else {
            $this->_render_strategy = $this->_registry
                ->get( 'http.response.render.strategy.void' );
        }
    }

    /**
     * Create a duplicate from a posts' instance
     */
    public function ai1ec_duplicate_post_create_duplicate( $post, $status = '' ) {
        $post            = get_post( $post );
        $new_post_author = $this->_ai1ec_duplicate_post_get_current_user();
        $new_post_status = $status;
        if ( empty( $new_post_status ) ) {
            $new_post_status = $post->post_status;
        }
        $new_post_status = $this->_get_new_post_status( $new_post_status );

        $new_post = array(
            'menu_order'     => $post->menu_order,
            'comment_status' => $post->comment_status,
            'ping_status'    => $post->ping_status,
            'pinged'         => $post->pinged,
            'post_author'    => $new_post_author->ID,
            'post_content'   => $post->post_content,
            'post_date'      => $post->post_date,
            'post_date_gmt'  => get_gmt_from_date( $post->post_date  ),
            'post_excerpt'   => $post->post_excerpt,
            'post_parent'    => $post->post_parent,
            'post_password'  => $post->post_password,
            'post_status'    => $new_post_status,
            'post_title'     => $post->post_title,
            'post_type'      => $post->post_type,
            'to_ping'        => $post->to_ping,
        );

        $new_post_id    = wp_insert_post( $new_post );
        $edit_event_url = esc_attr(
            ai1ec_admin_url( "post.php?post={$new_post_id}&action=edit" )
        );
        $message = sprintf(
            __( '<p>The event <strong>%s</strong> was cloned succesfully. <a href="%s">Edit cloned event</a></p>', AI1EC_PLUGIN_NAME ),
            $post->post_title,
            $edit_event_url
        );
        $notification   = $this->_registry->get( 'notification.admin' );
        $notification->store( $message );
        $this->_ai1ec_duplicate_post_copy_post_taxonomies( $new_post_id, $post );
        $this->_ai1ec_duplicate_post_copy_attachments(     $new_post_id, $post );
        $this->_ai1ec_duplicate_post_copy_post_meta_info(  $new_post_id, $post );

        $api = $this->_registry->get( 'model.api.api-ticketing' );
        $api->clear_event_metadata( $new_post_id );

        if ( $this->_registry->get( 'acl.aco' )->is_our_post_type( $post ) ) {
            try {
                $old_event = $this->_registry->get( 'model.event', $post->ID );
                $old_event->set( 'post_id',         $new_post_id );
                $old_event->set( 'post',            null );
                $old_event->set( 'ical_feed_url',   null );
                $old_event->set( 'ical_source_url', null );
                $old_event->set( 'ical_organizer',  null );
                $old_event->set( 'ical_contact',    null );
                $old_event->set( 'ical_uid',        null );
                $old_event->save();
            } catch ( Ai1ec_Event_Not_Found_Exception $exception ) {
                /* ignore */
            }
        }

        $meta_post = $this->_registry->get( 'model.meta-post' );
        $meta_post->delete( $new_post_id, '_dp_original' );
        $meta_post->add(    $new_post_id, '_dp_original', $post->ID );

        // If the copy gets immediately published, we have to set a proper slug.
        if (
            $new_post_status == 'publish' ||
            $new_post_status == 'future'
        ) {
            $post_name = wp_unique_post_slug(
                $post->post_name,
                $new_post_id,
                $new_post_status,
                $post->post_type,
                $post->post_parent
            );

            $new_post = array();
            $new_post['ID']        = $new_post_id;
            $new_post['post_name'] = $post_name;

            // Update the post into the database
            wp_update_post( $new_post );
        }

        return $new_post_id;
    }

    /**
     * Copy the meta information of a post to another post
     */
    protected function _ai1ec_duplicate_post_copy_post_meta_info( $new_id, $post ) {
        $post_meta_keys = get_post_custom_keys( $post->ID );
        if ( empty( $post_meta_keys ) ) {
            return;
        }

        foreach ( $post_meta_keys as $meta_key ) {
            $meta_values = get_post_custom_values( $meta_key, $post->ID );
            foreach ( $meta_values as $meta_value ) {
                $meta_value = maybe_unserialize( $meta_value );
                $meta_value = apply_filters(
                    'ai1ec_duplicate_post_meta_value',
                    $meta_value,
                    $meta_key,
                    $post,
                    $new_id
                );
                if ( null !== $meta_value ) {
                    add_post_meta( $new_id, $meta_key, $meta_value );
                }
            }
        }
    }

    /**
     * Copy the attachments
     * It simply copies the table entries, actual file won't be duplicated
     */
    protected function _ai1ec_duplicate_post_copy_attachments( $new_id, $post ) {
        //if (get_option('ai1ec_duplicate_post_copyattachments') == 0) return;

        // get old attachments
        $attachments = get_posts(
            array(
                'post_type'   => 'attachment',
                'numberposts' => -1,
                'post_status' => null,
                'post_parent' => $post->ID,
            )
        );
        // clone old attachments
        foreach ( $attachments as $att ) {
            $new_att_author = $this->_ai1ec_duplicate_post_get_current_user();

            $new_att = array(
                'menu_order'     => $att->menu_order,
                'comment_status' => $att->comment_status,
                'guid'           => $att->guid,
                'ping_status'    => $att->ping_status,
                'pinged'         => $att->pinged,
                'post_author'    => $new_att_author->ID,
                'post_content'   => $att->post_content,
                'post_date'      => $att->post_date,
                'post_date_gmt'  => get_gmt_from_date( $att->post_date ),
                'post_excerpt'   => $att->post_excerpt,
                'post_mime_type' => $att->post_mime_type,
                'post_parent'    => $new_id,
                'post_password'  => $att->post_password,
                'post_status'    => $this->_get_new_post_status(
                    $att->post_status
                ),
                'post_title'     => $att->post_title,
                'post_type'      => $att->post_type,
                'to_ping'        => $att->to_ping,
            );

            $new_att_id = wp_insert_post( $new_att );

            // get and apply a unique slug
            $att_name = wp_unique_post_slug(
                $att->post_name,
                $new_att_id,
                $att->post_status,
                $att->post_type,
                $new_id
            );
            $new_att = array();
            $new_att['ID']        = $new_att_id;
            $new_att['post_name'] = $att_name;

            wp_update_post( $new_att );


        }
    }

    /**
     * Copy the taxonomies of a post to another post
     */
    protected function _ai1ec_duplicate_post_copy_post_taxonomies( $new_id, $post ) {
        $db = $this->_registry->get( 'dbi.dbi' );
        if ( $db->are_terms_set() ) {
            // Clear default category (added by wp_insert_post)
            wp_set_object_terms( $new_id, NULL, 'category' );

            $post_taxonomies = get_object_taxonomies( $post->post_type );

            $taxonomies_blacklist = array();
            $taxonomies = array_diff( $post_taxonomies, $taxonomies_blacklist );
            foreach ( $taxonomies as $taxonomy ) {
                $post_terms = wp_get_object_terms(
                    $post->ID,
                    $taxonomy,
                    array( 'orderby' => 'term_order' )
                );
                $terms = array();
                for ( $i = 0; $i < count( $post_terms ); $i++ ) {
                    $terms[] = $post_terms[ $i ]->slug;
                }
                wp_set_object_terms( $new_id, $terms, $taxonomy );
            }
        }
    }

    /**
     * Get the currently registered user
     */
    protected function _ai1ec_duplicate_post_get_current_user() {
        if ( function_exists( 'wp_get_current_user' ) ) {
            return wp_get_current_user();
        } else {
            $db = $this->_registry->get( 'dbi.dbi' );
            $query = $db->prepare(
                'SELECT * FROM ' . $wpdb->users . ' WHERE user_login = %s',
                $_COOKIE[ USER_COOKIE ]
            );
            $current_user = $db->get_results( $query );
            return $current_user;
        }
    }

    /**
     * Get the status for `duplicate' post
     *
     * If user cannot publish post (event), and original post status is
     * *publish*, then it will be duplicated with *pending* status.
     * In other cases original status will remain.
     *
     * @param string $old_status Status of old post
     *
     * @return string Status for new post
     */
    protected  function _get_new_post_status( $old_status ) {
        if (
            'publish' === $old_status &&
            ! current_user_can( 'publish_ai1ec_events' )
        ) {
            return 'pending';
        }
        return $old_status;
    }
}