<?php
namespace FileBird\Controller;
defined('ABSPATH') || exit;

/**
 * Helps to convert old-data (from filebird old version) to new data
 */

class Convert {

  private static $folder_table = 'fbv';
  private static $relation_table = 'fbv_attachment_folder';

  public function __construct() {
  }
  
  public static function insertToNewTable($folders = null) {
    global $wpdb;
    if(is_null($folders)) $folders = Convert::getOldFolers();
    foreach($folders as $k => $folder) {
      if(is_array($folder)) {
        $folder = json_decode(json_encode($folder));
      }

      $parent = $folder->parent;
      if($parent > 0) {
        $parent = get_term_meta($parent, 'new_fbv_id', true);
      }
      $check = self::detail($folder->name, $parent, $folder->created_by);
      $insert_id = 0;
      if(is_null($check)) {
        $wpdb->insert(self::getTable(self::$folder_table), array(
          'name' => $folder->name,
          'parent' => $parent,
          'created_by' => $folder->created_by,
          'type' => 0
        ));
        $insert_id = (int)$wpdb->insert_id;
      } else {
        $insert_id = (int)$check->id;
      }
      //attachments
      if(isset($folder->attachments)) {
        foreach($folder->attachments as $k2 => $attachment_id) {
          $post = get_post($attachment_id);
          if(is_object($post) && $post->post_type == 'attachment') {
            self::setFolder($attachment_id, $insert_id, false);
          }
        }
      }
      //update new_fbv_id for this term
      update_term_meta($folder->id, 'new_fbv_id', $insert_id);

    }
  }
  private static function setFolder($ids, $folder, $delete_first = false) {
    global $wpdb;
    if(is_numeric($ids)) {
      $ids = array($ids);
    }
    foreach ($ids as $k => $v) {
      if($delete_first) {
        $wpdb->delete(self::getTable(self::$relation_table), array('attachment_id' => $v), array('%d'));
      }
      if((int)$folder > 0) {
        $wpdb->insert(self::getTable(self::$relation_table), array('attachment_id' => (int)$v, 'folder_id' => (int)$folder), array('%d', '%d'));
      }
    }
  }
  private static function detail($name, $parent, $created_by = null) {
    global $wpdb;

    $query = $wpdb->prepare('SELECT id FROM %1$s WHERE `name` = "%2$s" AND `parent` = %3$d', self::getTable(self::$folder_table), $name, $parent);
    
    if(!is_null($created_by)) {
      $query .= " AND created_by = " . (int)$created_by;
    } else {
      $user_has_own_folder = get_option('njt_fbv_folder_per_user', '0') === '1';
      if($user_has_own_folder) {
        $query .= " AND created_by = " . get_current_user_id();
      } else {
        $query .= " AND created_by = 0";
      }
    }
    $check = $wpdb->get_results($query);
    
    if($check != null && count($check) > 0) {
      return $check[0];
    } else {
      return null;
    }
  }
  private static function getTable($table) {
    global $wpdb;
    return $wpdb->prefix . $table;
  }

  public static function getOldFolers() {
    $folders = self::_getOldFolers(0);
    return $folders;
  }

  private static function _getOldFolers($parent) {
    global $wpdb;
    $folders = array();
    $query = $wpdb->prepare("SELECT t.term_id as id, t.name FROM $wpdb->terms as t LEFT JOIN $wpdb->term_taxonomy as tt ON (t.term_id = tt.term_id) WHERE parent = %d and taxonomy = 'nt_wmc_folder'", $parent);
    $folders = $wpdb->get_results($query);
    foreach($folders as $k => $v) {
      $folders[$k]->parent = $parent;
      $folders[$k]->created_by = (int)$wpdb->get_var("SELECT meta_value FROM {$wpdb->termmeta} WHERE meta_key = 'fb_created_by' AND term_id = " . (int)$v->id);
      $folders[$k]->attachments = self::_getAttachments($v->id);
    }
    foreach($folders as $k => $v) {
      $children = self::_getOldFolers($v->id);
      foreach($children as $k2 => $v2) {
        $folders[] = $v2;
      }
    }
    return $folders;
  }
  private static function _getAttachments($term_id) {
    global $wpdb;
    $term_taxonomy_id = $wpdb->get_var($wpdb->prepare("SELECT term_taxonomy_id FROM $wpdb->term_taxonomy WHERE term_id = %d", $term_id));
    $query = $wpdb->prepare("SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term_taxonomy_id);
    
    $_data = $wpdb->get_results($query);
    $ids = array();
    foreach($_data as $k => $v) {
      $ids[] = $v->object_id;
    }
    return $ids;
  }
}